2669 lines
61 KiB
Plaintext
2669 lines
61 KiB
Plaintext
//
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// MIPS Architecture:
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//
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// CPU Instruction Set (mips16)
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//
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// The instructions in this section are ordered according
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// to http://www.sgi.com/MIPS/arch/MIPS16/mips16.pdf.
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// FIXME: Instead of having the code for mips16 instructions here.
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// these instructions should instead call the corresponding 32bit
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// instruction (or a function implementing that instructions code).
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// Load and Store Instructions
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10000,xxx,ddd,55555:RRI:16::LB
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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signed_word op1 = (instruction >> 8) & 0x7;
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int destreg = (instruction >> 5) & 0x7;
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int offset = (instruction >> 0) & 0x1f;
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if (op1 < 2)
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op1 += 16;
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op1 = GPR[op1];
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 0;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
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LoadMemory(&memval,&memval1,uncached,AccessLength_BYTE,paddr,vaddr,isDATA,isREAL);
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byte = ((vaddr & mask) ^ (bigend << shift));
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GPR[destreg] = (SIGNEXTEND(((memval >> (8 * byte)) & 0x000000FF),8));
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}
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}
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}
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}
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10100,xxx,ddd,55555:RRI:16::LBU
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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signed_word op1 = (instruction >> 8) & 0x7;
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int destreg = (instruction >> 5) & 0x7;
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int offset = (instruction >> 0) & 0x1f;
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if (op1 < 2)
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op1 += 16;
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op1 = GPR[op1];
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 0;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
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LoadMemory(&memval,&memval1,uncached,AccessLength_BYTE,paddr,vaddr,isDATA,isREAL);
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byte = ((vaddr & mask) ^ (bigend << shift));
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GPR[destreg] = (((memval >> (8 * byte)) & 0x000000FF));
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}
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}
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}
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}
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10001,xxx,ddd,HHHHH:RRI:16::LH
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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signed_word op1 = (instruction >> 8) & 0x7;
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int destreg = (instruction >> 5) & 0x7;
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int offset = (instruction >> 0) & 0x1f;
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if (op1 < 2)
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op1 += 16;
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op1 = GPR[op1];
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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offset <<= 1;
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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if ((vaddr & 1) != 0)
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SignalExceptionAddressLoad();
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else
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 1;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
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LoadMemory(&memval,&memval1,uncached,AccessLength_HALFWORD,paddr,vaddr,isDATA,isREAL);
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byte = ((vaddr & mask) ^ (bigend << shift));
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GPR[destreg] = (SIGNEXTEND(((memval >> (8 * byte)) & 0x0000FFFF),16));
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}
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}
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}
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}
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10101,xxx,ddd,HHHHH:RRI:16::LHU
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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signed_word op1 = (instruction >> 8) & 0x7;
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int destreg = (instruction >> 5) & 0x7;
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int offset = (instruction >> 0) & 0x1f;
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if (op1 < 2)
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op1 += 16;
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op1 = GPR[op1];
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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offset <<= 1;
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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if ((vaddr & 1) != 0)
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SignalExceptionAddressLoad();
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else
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 1;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
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LoadMemory(&memval,&memval1,uncached,AccessLength_HALFWORD,paddr,vaddr,isDATA,isREAL);
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byte = ((vaddr & mask) ^ (bigend << shift));
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GPR[destreg] = (((memval >> (8 * byte)) & 0x0000FFFF));
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}
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}
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}
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}
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10011,xxx,ddd,WWWWW:RRI:16::LW
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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signed_word op1 = (instruction >> 8) & 0x7;
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int destreg = (instruction >> 5) & 0x7;
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int offset = (instruction >> 0) & 0x1f;
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if (op1 < 2)
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op1 += 16;
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op1 = GPR[op1];
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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offset <<= 2;
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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if ((vaddr & 3) != 0)
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SignalExceptionAddressLoad();
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else
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 2;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
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LoadMemory(&memval,&memval1,uncached,AccessLength_WORD,paddr,vaddr,isDATA,isREAL);
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byte = ((vaddr & mask) ^ (bigend << shift));
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GPR[destreg] = (SIGNEXTEND(((memval >> (8 * byte)) & 0xFFFFFFFF),32));
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}
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}
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}
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}
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10110,ddd,VVVVVVVV,P:RI:16::LWPC
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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int destreg = (instruction >> 8) & 0x7;
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int offset = (instruction >> 0) & 0xff;
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signed_word op1 = ((INDELAYSLOT () ? (INJALDELAYSLOT () ? IPC - 4 : IPC - 2) : (have_extendval ? IPC - 2 : IPC)) & ~ (unsigned64) 1) & ~ (unsigned64) 0x3;
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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offset <<= 2;
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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if ((vaddr & 3) != 0)
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SignalExceptionAddressLoad();
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else
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 2;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
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LoadMemory(&memval,&memval1,uncached,AccessLength_WORD,paddr,vaddr,isDATA,isREAL);
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byte = ((vaddr & mask) ^ (bigend << shift));
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GPR[destreg] = (SIGNEXTEND(((memval >> (8 * byte)) & 0xFFFFFFFF),32));
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}
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}
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}
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}
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10010,ddd,VVVVVVVV,s:RI:16::LWSP
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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int destreg = (instruction >> 8) & 0x7;
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int offset = (instruction >> 0) & 0xff;
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signed_word op1 = 29;
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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offset <<= 2;
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}
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op1 = GPR[op1];
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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if ((vaddr & 3) != 0)
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SignalExceptionAddressLoad();
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else
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 2;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
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LoadMemory(&memval,&memval1,uncached,AccessLength_WORD,paddr,vaddr,isDATA,isREAL);
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byte = ((vaddr & mask) ^ (bigend << shift));
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GPR[destreg] = (SIGNEXTEND(((memval >> (8 * byte)) & 0xFFFFFFFF),32));
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}
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}
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}
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}
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10111,xxx,ddd,WWWWW:RRI:16::LWU
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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signed_word op1 = (instruction >> 8) & 0x7;
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int destreg = (instruction >> 5) & 0x7;
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int offset = (instruction >> 0) & 0x1f;
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if (op1 < 2)
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op1 += 16;
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op1 = GPR[op1];
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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offset <<= 2;
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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if ((vaddr & 3) != 0)
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SignalExceptionAddressLoad();
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else
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 2;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
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LoadMemory(&memval,&memval1,uncached,AccessLength_WORD,paddr,vaddr,isDATA,isREAL);
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byte = ((vaddr & mask) ^ (bigend << shift));
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GPR[destreg] = (((memval >> (8 * byte)) & 0xFFFFFFFF));
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}
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}
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}
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}
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00111,xxx,ddd,DDDDD:RRI:16::LD
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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signed_word op1 = (instruction >> 8) & 0x7;
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int destreg = (instruction >> 5) & 0x7;
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int offset = (instruction >> 0) & 0x1f;
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if (op1 < 2)
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op1 += 16;
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op1 = GPR[op1];
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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offset <<= 3;
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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if ((vaddr & 7) != 0)
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SignalExceptionAddressLoad();
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else
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
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unsigned64 memval1 = 0;
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unsigned64 mask = 0x7;
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unsigned int shift = 4;
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unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
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unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
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unsigned int byte;
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LoadMemory(&memval,&memval1,uncached,AccessLength_DOUBLEWORD,paddr,vaddr,isDATA,isREAL);
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GPR[destreg] = memval;
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}
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}
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}
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}
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11111100,ddd,5.RD,P:RI64:16::LDPC
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*mips16:
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{
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unsigned32 instruction = instruction_0;
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int destreg = (instruction >> 5) & 0x7;
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int offset = (instruction >> 0) & 0x1f;
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signed_word op1 = ((INDELAYSLOT () ? (INJALDELAYSLOT () ? IPC - 4 : IPC - 2) : (have_extendval ? IPC - 2 : IPC)) & ~ (unsigned64) 1) & ~ (unsigned64) 0x7;
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if (destreg < 2)
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destreg += 16;
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if (have_extendval)
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{
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offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
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if (offset >= 0x8000)
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offset -= 0x10000;
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have_extendval = 0;
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}
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else
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{
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offset <<= 3;
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}
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if (have_extendval)
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SignalException (ReservedInstruction, instruction);
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{
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address_word vaddr = ((unsigned64)op1 + offset);
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address_word paddr;
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int uncached;
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if ((vaddr & 7) != 0)
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SignalExceptionAddressLoad();
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else
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{
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if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
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{
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unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
unsigned64 mask = 0x7;
|
|
unsigned int shift = 4;
|
|
unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
|
|
unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
|
|
unsigned int byte;
|
|
LoadMemory(&memval,&memval1,uncached,AccessLength_DOUBLEWORD,paddr,vaddr,isDATA,isREAL);
|
|
GPR[destreg] = memval;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11111000,ddd,5.RD,s:RI64:16::LDSP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 5) & 0x7;
|
|
int offset = (instruction >> 0) & 0x1f;
|
|
signed_word op1 = 29;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
offset <<= 3;
|
|
}
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
if ((vaddr & 7) != 0)
|
|
SignalExceptionAddressLoad();
|
|
else
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
unsigned64 mask = 0x7;
|
|
unsigned int shift = 4;
|
|
unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
|
|
unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
|
|
unsigned int byte;
|
|
LoadMemory(&memval,&memval1,uncached,AccessLength_DOUBLEWORD,paddr,vaddr,isDATA,isREAL);
|
|
GPR[destreg] = memval;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11000,xxx,yyy,55555:RRI:16::SB
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int offset = (instruction >> 0) & 0x1f;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
unsigned64 mask = 0x7;
|
|
unsigned int shift = 0;
|
|
unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
|
|
unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
|
|
unsigned int byte;
|
|
paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
|
|
byte = ((vaddr & mask) ^ (bigend << shift));
|
|
memval = ((unsigned64) op2 << (8 * byte));
|
|
{
|
|
StoreMemory(uncached,AccessLength_BYTE,memval,memval1,paddr,vaddr,isREAL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11001,xxx,yyy,HHHHH:RRI:16::SH
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int offset = (instruction >> 0) & 0x1f;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
offset <<= 1;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
if ((vaddr & 1) != 0)
|
|
SignalExceptionAddressStore();
|
|
else
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
unsigned64 mask = 0x7;
|
|
unsigned int shift = 1;
|
|
unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);
|
|
unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);
|
|
unsigned int byte;
|
|
paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
|
|
byte = ((vaddr & mask) ^ (bigend << shift));
|
|
memval = ((unsigned64) op2 << (8 * byte));
|
|
{
|
|
StoreMemory(uncached,AccessLength_HALFWORD,memval,memval1,paddr,vaddr,isREAL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11011,xxx,yyy,WWWWW:RRI:16::SW
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int offset = (instruction >> 0) & 0x1f;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
offset <<= 2;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
if ((vaddr & 3) != 0)
|
|
SignalExceptionAddressStore();
|
|
else
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
unsigned64 mask = 0x7;
|
|
unsigned int byte;
|
|
paddr = ((paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)));
|
|
byte = ((vaddr & mask) ^ (BigEndianCPU << 2));
|
|
memval = ((unsigned64) op2 << (8 * byte));
|
|
{
|
|
StoreMemory(uncached,AccessLength_WORD,memval,memval1,paddr,vaddr,isREAL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11010,yyy,VVVVVVVV,s:RI:16::SWSP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op2 = (instruction >> 8) & 0x7;
|
|
int offset = (instruction >> 0) & 0xff;
|
|
signed_word op1 = 29;
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
offset <<= 2;
|
|
}
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
if ((vaddr & 3) != 0)
|
|
SignalExceptionAddressStore();
|
|
else
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
unsigned64 mask = 0x7;
|
|
unsigned int byte;
|
|
paddr = ((paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)));
|
|
byte = ((vaddr & mask) ^ (BigEndianCPU << 2));
|
|
memval = ((unsigned64) op2 << (8 * byte));
|
|
{
|
|
StoreMemory(uncached,AccessLength_WORD,memval,memval1,paddr,vaddr,isREAL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
01100010,VVVVVVVV,Q,s:I8:16::SWRASP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int offset = (instruction >> 0) & 0xff;
|
|
signed_word op2 = 31;
|
|
signed_word op1 = 29;
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
offset <<= 2;
|
|
}
|
|
op2 = GPR[op2];
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
if ((vaddr & 3) != 0)
|
|
SignalExceptionAddressStore();
|
|
else
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
unsigned64 mask = 0x7;
|
|
unsigned int byte;
|
|
paddr = ((paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)));
|
|
byte = ((vaddr & mask) ^ (BigEndianCPU << 2));
|
|
memval = ((unsigned64) op2 << (8 * byte));
|
|
{
|
|
StoreMemory(uncached,AccessLength_WORD,memval,memval1,paddr,vaddr,isREAL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
01111,xxx,yyy,DDDDD:RRI:16::SD
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int offset = (instruction >> 0) & 0x1f;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
offset <<= 3;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
if ((vaddr & 7) != 0)
|
|
SignalExceptionAddressStore();
|
|
else
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
memval = op2;
|
|
{
|
|
StoreMemory(uncached,AccessLength_DOUBLEWORD,memval,memval1,paddr,vaddr,isREAL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11111001,yyy,5.RD,s:RI64:16::SDSP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int offset = (instruction >> 0) & 0x1f;
|
|
signed_word op1 = 29;
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
offset <<= 3;
|
|
}
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
if ((vaddr & 7) != 0)
|
|
SignalExceptionAddressStore();
|
|
else
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
memval = op2;
|
|
{
|
|
StoreMemory(uncached,AccessLength_DOUBLEWORD,memval,memval1,paddr,vaddr,isREAL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11111010,CCCCCCCC,s,Q:I64:16::SDRASP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int offset = (instruction >> 0) & 0xff;
|
|
signed_word op1 = 29;
|
|
signed_word op2 = 31;
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
offset <<= 3;
|
|
}
|
|
op1 = GPR[op1];
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
address_word vaddr = ((unsigned64)op1 + offset);
|
|
address_word paddr;
|
|
int uncached;
|
|
if ((vaddr & 7) != 0)
|
|
SignalExceptionAddressStore();
|
|
else
|
|
{
|
|
if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&uncached,isTARGET,isREAL))
|
|
{
|
|
unsigned64 memval = 0;
|
|
unsigned64 memval1 = 0;
|
|
memval = op2;
|
|
{
|
|
StoreMemory(uncached,AccessLength_DOUBLEWORD,memval,memval1,paddr,vaddr,isREAL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// ALU Immediate Instructions
|
|
|
|
|
|
01101,ddd,UUUUUUUU,Z:RI:16::LI
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
signed_word op1 = 0;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if (destreg != 0)
|
|
GPR[destreg] = (op1 | op2);
|
|
}
|
|
}
|
|
|
|
|
|
01000,xxx,ddd,04444:RRI_A:16::ADDIU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int destreg = (instruction >> 5) & 0x7;
|
|
int op2 = (instruction >> 0) & 0xf;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0xf) << 11) | (extendval & 0x7f0);
|
|
if (op2 >= 0x4000)
|
|
op2 -= 0x8000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op2 >= 0x8)
|
|
op2 -= 0x10;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int temp = (unsigned int)(op1 + op2);
|
|
signed int tempS = (signed int)temp;
|
|
GPR[destreg] = SIGNEXTEND(((unsigned64)temp),32);
|
|
}
|
|
}
|
|
|
|
|
|
01001,www,kkkkkkkk:RI:16::ADDIU8
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int destreg;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
destreg = op1;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op2 >= 0x80)
|
|
op2 -= 0x100;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int temp = (unsigned int)(op1 + op2);
|
|
signed int tempS = (signed int)temp;
|
|
GPR[destreg] = SIGNEXTEND(((unsigned64)temp),32);
|
|
}
|
|
}
|
|
|
|
|
|
01100011,KKKKKKKK,S:I8:16::ADJSP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
signed_word op1 = 29;
|
|
int destreg;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op2 >= 0x80)
|
|
op2 -= 0x100;
|
|
op2 <<= 3;
|
|
}
|
|
destreg = op1;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int temp = (unsigned int)(op1 + op2);
|
|
signed int tempS = (signed int)temp;
|
|
GPR[destreg] = SIGNEXTEND(((unsigned64)temp),32);
|
|
}
|
|
}
|
|
|
|
|
|
00001,ddd,AAAAAAAA,P:RI:16::ADDIUPC
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
signed_word op1 = ((INDELAYSLOT () ? (INJALDELAYSLOT () ? IPC - 4 : IPC - 2) : (have_extendval ? IPC - 2 : IPC)) & ~ (unsigned64) 1) & ~ (unsigned64) 0x3;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
op2 <<= 2;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int temp = (unsigned int)(op1 + op2);
|
|
signed int tempS = (signed int)temp;
|
|
GPR[destreg] = SIGNEXTEND(((unsigned64)temp),32);
|
|
}
|
|
}
|
|
|
|
|
|
00000,ddd,AAAAAAAA,s:RI:16::ADDIUSP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
signed_word op1 = 29;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
op2 <<= 2;
|
|
}
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int temp = (unsigned int)(op1 + op2);
|
|
signed int tempS = (signed int)temp;
|
|
GPR[destreg] = SIGNEXTEND(((unsigned64)temp),32);
|
|
}
|
|
}
|
|
|
|
|
|
01000,xxx,ddd,14444:RRI_A:16::DADDIU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int destreg = (instruction >> 5) & 0x7;
|
|
int op2 = (instruction >> 0) & 0xf;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0xf) << 11) | (extendval & 0x7f0);
|
|
if (op2 >= 0x4000)
|
|
op2 -= 0x8000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op2 >= 0x8)
|
|
op2 -= 0x10;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 temp = (unsigned64)(op1 + op2);
|
|
word64 tempS = (word64)temp;
|
|
GPR[destreg] = (unsigned64)temp;
|
|
}
|
|
}
|
|
|
|
|
|
11111101,www,jjjjj:RI64:16::DADDIU5
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
int op2 = (instruction >> 0) & 0x1f;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
destreg = op1;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op2 >= 0x10)
|
|
op2 -= 0x20;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 temp = (unsigned64)(op1 + op2);
|
|
word64 tempS = (word64)temp;
|
|
GPR[destreg] = (unsigned64)temp;
|
|
}
|
|
}
|
|
|
|
|
|
11111011,KKKKKKKK,S:I64:16::DADJSP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
signed_word op1 = 29;
|
|
int destreg;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op2 >= 0x80)
|
|
op2 -= 0x100;
|
|
op2 <<= 3;
|
|
}
|
|
destreg = op1;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 temp = (unsigned64)(op1 + op2);
|
|
word64 tempS = (word64)temp;
|
|
GPR[destreg] = (unsigned64)temp;
|
|
}
|
|
}
|
|
|
|
|
|
11111110,ddd,EEEEE,P:RI64:16::DADDIUPC
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 5) & 0x7;
|
|
int op2 = (instruction >> 0) & 0x1f;
|
|
signed_word op1 = ((INDELAYSLOT () ? (INJALDELAYSLOT () ? IPC - 4 : IPC - 2) : (have_extendval ? IPC - 2 : IPC)) & ~ (unsigned64) 1) & ~ (unsigned64) 0x3;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
op2 <<= 2;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 temp = (unsigned64)(op1 + op2);
|
|
word64 tempS = (word64)temp;
|
|
GPR[destreg] = (unsigned64)temp;
|
|
}
|
|
}
|
|
|
|
|
|
11111111,ddd,EEEEE,s:RI64:16::DADDIUSP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 5) & 0x7;
|
|
int op2 = (instruction >> 0) & 0x1f;
|
|
signed_word op1 = 29;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
op2 <<= 2;
|
|
}
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 temp = (unsigned64)(op1 + op2);
|
|
word64 tempS = (word64)temp;
|
|
GPR[destreg] = (unsigned64)temp;
|
|
}
|
|
}
|
|
|
|
|
|
01010,xxx,88888888,T:RI:16::SLTI
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
int destreg = 24;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if ((word64)op1 < (word64)op2)
|
|
GPR[destreg] = 1;
|
|
else
|
|
GPR[destreg] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
01011,xxx,88888888,T:RI:16::SLTIU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
int destreg = 24;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (op2 >= 0x8000)
|
|
op2 -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if ((unsigned64)op1 < (unsigned64)op2)
|
|
GPR[destreg] = 1;
|
|
else
|
|
GPR[destreg] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,01010,T:RR:16::CMP
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg = 24;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = (op1 ^ op2);
|
|
}
|
|
}
|
|
|
|
|
|
01110,xxx,UUUUUUUU,T:RI:16::CMPI
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int op2 = (instruction >> 0) & 0xff;
|
|
int destreg = 24;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
{
|
|
op2 |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = (op1 ^ op2);
|
|
}
|
|
}
|
|
|
|
|
|
// Two/Three Operand, Register-Type
|
|
|
|
|
|
11100,xxx,yyy,ddd,01:RRR:16::ADDU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg = (instruction >> 2) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int temp = (unsigned int)(op1 + op2);
|
|
signed int tempS = (signed int)temp;
|
|
GPR[destreg] = SIGNEXTEND(((unsigned64)temp),32);
|
|
}
|
|
}
|
|
|
|
|
|
11100,xxx,yyy,ddd,11:RRR:16::SUBU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg = (instruction >> 2) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int temp = (unsigned int)(op1 - op2);
|
|
signed int tempS = (signed int)temp;
|
|
GPR[destreg] = SIGNEXTEND(((unsigned64)temp),32);
|
|
}
|
|
}
|
|
|
|
|
|
11100,xxx,yyy,ddd,00:RRR:16::DADDU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg = (instruction >> 2) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 temp = (unsigned64)(op1 + op2);
|
|
word64 tempS = (word64)temp;
|
|
GPR[destreg] = (unsigned64)temp;
|
|
}
|
|
}
|
|
|
|
|
|
11100,xxx,yyy,ddd,10:RRR:16::DSUBU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg = (instruction >> 2) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 temp = (unsigned64)(op1 - op2);
|
|
word64 tempS = (word64)temp;
|
|
GPR[destreg] = (unsigned64)temp;
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,00010,T:RR:16::SLT
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg = 24;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if ((word64)op1 < (word64)op2)
|
|
GPR[destreg] = 1;
|
|
else
|
|
GPR[destreg] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,00011,T:RR:16::SLTU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg = 24;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if ((unsigned64)op1 < (unsigned64)op2)
|
|
GPR[destreg] = 1;
|
|
else
|
|
GPR[destreg] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
11101,ddd,yyy,01011,Z:RR:16::NEG
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
signed_word op1 = 0;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int temp = (unsigned int)(op1 - op2);
|
|
signed int tempS = (signed int)temp;
|
|
GPR[destreg] = SIGNEXTEND(((unsigned64)temp),32);
|
|
}
|
|
}
|
|
|
|
|
|
11101,www,yyy,01100:RR:16::AND
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int destreg;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
destreg = op1;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = (op1 & op2);
|
|
}
|
|
}
|
|
|
|
|
|
11101,www,yyy,01101:RR:16::OR
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int destreg;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
destreg = op1;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if (destreg != 0)
|
|
GPR[destreg] = (op1 | op2);
|
|
}
|
|
}
|
|
|
|
|
|
11101,www,yyy,01110:RR:16::XOR
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int destreg;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
destreg = op1;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = (op1 ^ op2);
|
|
}
|
|
}
|
|
|
|
|
|
11101,ddd,yyy,01111,Z:RR:16::NOT
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
signed_word op1 = 0;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if (destreg != 0)
|
|
GPR[destreg] = ~(op1 | op2);
|
|
}
|
|
}
|
|
|
|
|
|
01100111,ddd,XXXXX,z:I8_MOVR32:16::MOVR32
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 5) & 0x7;
|
|
signed_word op1 = (instruction >> 0) & 0x1f;
|
|
signed_word op2 = 0;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if (destreg != 0)
|
|
GPR[destreg] = (op1 | op2);
|
|
}
|
|
}
|
|
|
|
|
|
01100101,YYYYY,xxx,z:I8_MOV32R:16::MOV32R
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 3) & 0x1f;
|
|
signed_word op1 = (instruction >> 0) & 0x7;
|
|
signed_word op2 = 0;
|
|
destreg = (destreg >> 2) | ((destreg & 3) << 3);
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
if (destreg != 0)
|
|
GPR[destreg] = (op1 | op2);
|
|
}
|
|
}
|
|
|
|
|
|
00110,ddd,yyy,sss,00:ISHIFT:16::SLL
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int op1 = (instruction >> 2) & 0x7;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
op1 = (extendval >> 6) & 0x1f;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op1 == 0)
|
|
op1 = 8;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = ((unsigned64)op2 << op1);
|
|
GPR[destreg] = SIGNEXTEND(GPR[destreg],32);
|
|
}
|
|
}
|
|
|
|
|
|
00110,ddd,yyy,sss,10:ISHIFT:16::SRL
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int op1 = (instruction >> 2) & 0x7;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
op1 = (extendval >> 6) & 0x1f;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op1 == 0)
|
|
op1 = 8;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = ((unsigned64)(op2 & 0xFFFFFFFF) >> op1);
|
|
GPR[destreg] = SIGNEXTEND(GPR[destreg],32);
|
|
}
|
|
}
|
|
|
|
|
|
00110,ddd,yyy,sss,11:ISHIFT:16::SRA
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int op1 = (instruction >> 2) & 0x7;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
op1 = (extendval >> 6) & 0x1f;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op1 == 0)
|
|
op1 = 8;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int highbit = (unsigned int)1 << 31;
|
|
GPR[destreg] = ((unsigned64)(op2 & 0xFFFFFFFF) >> op1);
|
|
GPR[destreg] |= (op1 != 0 && (op2 & highbit) ? ((((unsigned int)1 << op1) - 1) << (32 - op1)) : 0);
|
|
GPR[destreg] = SIGNEXTEND(GPR[destreg],32);
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,vvv,00100:RR:16::SLLV
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
destreg = op2;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
op1 &= 0x1F;
|
|
GPR[destreg] = ((unsigned64)op2 << op1);
|
|
GPR[destreg] = SIGNEXTEND(GPR[destreg],32);
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,vvv,00110:RR:16::SRLV
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
destreg = op2;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
op1 &= 0x1F;
|
|
GPR[destreg] = ((unsigned64)(op2 & 0xFFFFFFFF) >> op1);
|
|
GPR[destreg] = SIGNEXTEND(GPR[destreg],32);
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,vvv,00111:RR:16::SRAV
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
destreg = op2;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned int highbit = (unsigned int)1 << 31;
|
|
op1 &= 0x1F;
|
|
GPR[destreg] = ((unsigned64)(op2 & 0xFFFFFFFF) >> op1);
|
|
GPR[destreg] |= (op1 != 0 && (op2 & highbit) ? ((((unsigned int)1 << op1) - 1) << (32 - op1)) : 0);
|
|
GPR[destreg] = SIGNEXTEND(GPR[destreg],32);
|
|
}
|
|
}
|
|
|
|
|
|
00110,ddd,yyy,[[[,01:ISHIFT:16::DSLL
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int op1 = (instruction >> 2) & 0x7;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
{
|
|
op1 = ((extendval >> 6) & 0x1f) | (extendval & 0x20);
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op1 == 0)
|
|
op1 = 8;
|
|
}
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = ((unsigned64)op2 << op1);
|
|
}
|
|
}
|
|
|
|
|
|
11101,XXX,vvv,01000:RR:16::DSRL
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
if (have_extendval)
|
|
{
|
|
op1 = ((extendval >> 6) & 0x1f) | (extendval & 0x20);
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op1 == 0)
|
|
op1 = 8;
|
|
}
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
destreg = op2;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = ((unsigned64)(op2) >> op1);
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,vvv,10011:RR:16::DSRA
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
if (have_extendval)
|
|
{
|
|
op1 = ((extendval >> 6) & 0x1f) | (extendval & 0x20);
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (op1 == 0)
|
|
op1 = 8;
|
|
}
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
destreg = op2;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 highbit = (unsigned64)1 << 63;
|
|
GPR[destreg] = ((unsigned64)(op2) >> op1);
|
|
GPR[destreg] |= (op1 != 0 && (op2 & highbit) ? ((((unsigned64)1 << op1) - 1) << (64 - op1)) : 0);
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,vvv,10100:RR:16::DSLLV
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
destreg = op2;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
op1 &= 0x3F;
|
|
GPR[destreg] = ((unsigned64)op2 << op1);
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,vvv,10110:RR:16::DSRLV
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
destreg = op2;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
op1 &= 0x3F;
|
|
GPR[destreg] = ((unsigned64)(op2) >> op1);
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,vvv,10111:RR:16::DSRAV
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
int destreg;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
destreg = op2;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
unsigned64 highbit = (unsigned64)1 << 63;
|
|
op1 &= 0x3F;
|
|
GPR[destreg] = ((unsigned64)(op2) >> op1);
|
|
GPR[destreg] |= (op1 != 0 && (op2 & highbit) ? ((((unsigned64)1 << op1) - 1) << (64 - op1)) : 0);
|
|
}
|
|
}
|
|
|
|
|
|
// Multiply /Divide Instructions
|
|
|
|
|
|
11101,xxx,yyy,11000:RR:16::MULT
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
CHECKHILO("Multiplication");
|
|
{
|
|
unsigned64 temp = ((word64) op1 * (word64) op2);
|
|
LO = SIGNEXTEND((unsigned64)VL4_8(temp),32);
|
|
HI = SIGNEXTEND((unsigned64)VH4_8(temp),32);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,11001:RR:16::MULTU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
CHECKHILO("Multiplication");
|
|
{
|
|
unsigned64 temp = ((unsigned64)(op1 & 0xffffffff) * (unsigned64)(op2 & 0xffffffff));
|
|
LO = SIGNEXTEND((unsigned64)VL4_8(temp),32);
|
|
HI = SIGNEXTEND((unsigned64)VH4_8(temp),32);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,11010:RR:16::DIV
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
CHECKHILO("Division");
|
|
{
|
|
int d1 = op1;
|
|
int d2 = op2;
|
|
if (d2 == 0)
|
|
{
|
|
LO = SIGNEXTEND(0x80000000,32);
|
|
HI = SIGNEXTEND(0,32);
|
|
}
|
|
else if (d2 == -1 && d1 == 0x80000000)
|
|
{
|
|
LO = SIGNEXTEND(0x80000000,32);
|
|
HI = SIGNEXTEND(0,32);
|
|
}
|
|
else
|
|
{
|
|
LO = SIGNEXTEND((d1 / d2),32);
|
|
HI = SIGNEXTEND((d1 % d2),32);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,11011:RR:16::DIVU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
CHECKHILO("Division");
|
|
{
|
|
unsigned int d1 = op1;
|
|
unsigned int d2 = op2;
|
|
if (d2 == 0)
|
|
{
|
|
LO = SIGNEXTEND(0x80000000,32);
|
|
HI = SIGNEXTEND(0,32);
|
|
}
|
|
else if (d2 == -1 && d1 == 0x80000000)
|
|
{
|
|
LO = SIGNEXTEND(0x80000000,32);
|
|
HI = SIGNEXTEND(0,32);
|
|
}
|
|
else
|
|
{
|
|
LO = SIGNEXTEND((d1 / d2),32);
|
|
HI = SIGNEXTEND((d1 % d2),32);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11101,ddd,00010000:RR:16::MFHI
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = HI;
|
|
HIACCESS = 3; /* 3rd instruction will be safe */
|
|
}
|
|
}
|
|
|
|
|
|
11101,ddd,00010010:RR:16::MFLO
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int destreg = (instruction >> 8) & 0x7;
|
|
if (destreg < 2)
|
|
destreg += 16;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = LO;
|
|
LOACCESS = 3; /* 3rd instruction will be safe */
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,11100:RR:16::DMULT
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
CHECKHILO("Multiplication");
|
|
{
|
|
unsigned64 mid;
|
|
unsigned64 midhi;
|
|
unsigned64 temp;
|
|
int sign = 0;
|
|
if (op1 < 0) { op1 = - op1; ++sign; }
|
|
if (op2 < 0) { op2 = - op2; ++sign; }
|
|
LO = ((unsigned64)VL4_8(op1) * VL4_8(op2));
|
|
HI = ((unsigned64)VH4_8(op1) * VH4_8(op2));
|
|
mid = ((unsigned64)VH4_8(op1) * VL4_8(op2));
|
|
midhi = SET64HI(VL4_8(mid));
|
|
temp = (LO + midhi);
|
|
if ((temp == midhi) ? (LO != 0) : (temp < midhi))
|
|
HI += 1;
|
|
HI += VH4_8(mid);
|
|
mid = ((unsigned64)VL4_8(op1) * VH4_8(op2));
|
|
midhi = SET64HI(VL4_8(mid));
|
|
LO = (temp + midhi);
|
|
if ((LO == midhi) ? (temp != 0) : (LO < midhi))
|
|
HI += 1;
|
|
HI += VH4_8(mid);
|
|
if (sign & 1) { LO = - LO; HI = (LO == 0 ? 0 : -1) - HI; }
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,11101:RR:16::DMULTU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
CHECKHILO("Multiplication");
|
|
{
|
|
unsigned64 mid;
|
|
unsigned64 midhi;
|
|
unsigned64 temp;
|
|
LO = ((unsigned64)VL4_8(op1) * VL4_8(op2));
|
|
HI = ((unsigned64)VH4_8(op1) * VH4_8(op2));
|
|
mid = ((unsigned64)VH4_8(op1) * VL4_8(op2));
|
|
midhi = SET64HI(VL4_8(mid));
|
|
temp = (LO + midhi);
|
|
if ((temp == midhi) ? (LO != 0) : (temp < midhi))
|
|
HI += 1;
|
|
HI += VH4_8(mid);
|
|
mid = ((unsigned64)VL4_8(op1) * VH4_8(op2));
|
|
midhi = SET64HI(VL4_8(mid));
|
|
LO = (temp + midhi);
|
|
if ((LO == midhi) ? (temp != 0) : (LO < midhi))
|
|
HI += 1;
|
|
HI += VH4_8(mid);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,11110:RR:16::DDIV
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
CHECKHILO("Division");
|
|
{
|
|
word64 d1 = op1;
|
|
word64 d2 = op2;
|
|
if (d2 == 0)
|
|
{
|
|
LO = SIGNED64 (0x8000000000000000);
|
|
HI = 0;
|
|
}
|
|
else if (d2 == -1 && d1 == SIGNED64 (0x8000000000000000))
|
|
{
|
|
LO = SIGNED64 (0x8000000000000000);
|
|
HI = 0;
|
|
}
|
|
else
|
|
{
|
|
LO = (d1 / d2);
|
|
HI = (d1 % d2);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,yyy,11111:RR:16::DDIVU
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
signed_word op2 = (instruction >> 5) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (op2 < 2)
|
|
op2 += 16;
|
|
op2 = GPR[op2];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
CHECKHILO("Division");
|
|
{
|
|
unsigned64 d1 = op1;
|
|
unsigned64 d2 = op2;
|
|
if (d2 == 0)
|
|
{
|
|
LO = SIGNED64 (0x8000000000000000);
|
|
HI = 0;
|
|
}
|
|
else if (d2 == -1 && d1 == SIGNED64 (0x8000000000000000))
|
|
{
|
|
LO = SIGNED64 (0x8000000000000000);
|
|
HI = 0;
|
|
}
|
|
else
|
|
{
|
|
LO = (d1 / d2);
|
|
HI = (d1 % d2);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Jump and Branch Instructions
|
|
|
|
|
|
// JALX
|
|
// JAL
|
|
00011,aaaaaaaaaaa:I:16::JAL
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
unsigned_word op1 = (instruction >> 0) & 0x7ff;
|
|
{
|
|
address_word paddr;
|
|
int uncached;
|
|
if (AddressTranslation (PC &~ (unsigned64) 1, isINSTRUCTION, isLOAD, &paddr, &uncached, isTARGET, isREAL))
|
|
{
|
|
unsigned64 memval;
|
|
unsigned int reverse = (ReverseEndian ? 3 : 0);
|
|
unsigned int bigend = (BigEndianCPU ? 3 : 0);
|
|
unsigned int byte;
|
|
paddr = ((paddr & ~0x7) | ((paddr & 0x7) ^ (reverse << 1)));
|
|
LoadMemory (&memval,0,uncached, AccessLength_HALFWORD, paddr, PC, isINSTRUCTION, isREAL);
|
|
byte = (((PC &~ (unsigned64) 1) & 0x7) ^ (bigend << 1));
|
|
memval = (memval >> (8 * byte)) & 0xffff;
|
|
op1 = (((op1 & 0x1f) << 23)
|
|
| ((op1 & 0x3e0) << 13)
|
|
| (memval << 2));
|
|
if ((instruction & 0x400) == 0)
|
|
op1 |= 1;
|
|
PC += 2;
|
|
}
|
|
}
|
|
op1 |= PC & ~ (unsigned64) 0x0fffffff;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
int destreg = 31;
|
|
GPR[destreg] = (PC + 2); /* NOTE: The PC is already 2 ahead within the simulator */
|
|
/* NOTE: ??? Gdb gets confused if the PC is sign-extended,
|
|
so we just truncate it to 32 bits here. */
|
|
op1 = VL4_8(op1);
|
|
/* NOTE: The jump occurs AFTER the next instruction has been executed */
|
|
DELAY_SLOT op1;
|
|
JALDELAYSLOT();
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,00000000:RR:16::JR
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
/* NOTE: ??? Gdb gets confused if the PC is sign-extended,
|
|
so we just truncate it to 32 bits here. */
|
|
op1 = VL4_8(op1);
|
|
/* NOTE: The jump occurs AFTER the next instruction has been executed */
|
|
DELAY_SLOT op1;
|
|
DELAYSLOT();
|
|
}
|
|
}
|
|
|
|
|
|
1110100000100000,r:RR:16::JRRA
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = 31;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
/* NOTE: ??? Gdb gets confused if the PC is sign-extended,
|
|
so we just truncate it to 32 bits here. */
|
|
op1 = VL4_8(op1);
|
|
/* NOTE: The jump occurs AFTER the next instruction has been executed */
|
|
DELAY_SLOT op1;
|
|
DELAYSLOT();
|
|
}
|
|
}
|
|
|
|
|
|
11101,xxx,01000000,R:RR:16::JALR
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int destreg = 31;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
GPR[destreg] = (PC + 2); /* NOTE: The PC is already 2 ahead within the simulator */
|
|
/* NOTE: ??? Gdb gets confused if the PC is sign-extended,
|
|
so we just truncate it to 32 bits here. */
|
|
op1 = VL4_8(op1);
|
|
/* NOTE: The jump occurs AFTER the next instruction has been executed */
|
|
DELAY_SLOT op1;
|
|
DELAYSLOT();
|
|
}
|
|
}
|
|
|
|
|
|
00100,xxx,pppppppp,z:RI:16::BEQZ
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int offset = (instruction >> 0) & 0xff;
|
|
signed_word op2 = 0;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (offset >= 0x80)
|
|
offset -= 0x100;
|
|
}
|
|
offset *= 2;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
int condition = (op1 == op2);
|
|
if (condition)
|
|
PC = PC + offset;
|
|
}
|
|
}
|
|
|
|
|
|
00101,xxx,pppppppp,z:RI:16::BNEZ
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
signed_word op1 = (instruction >> 8) & 0x7;
|
|
int offset = (instruction >> 0) & 0xff;
|
|
signed_word op2 = 0;
|
|
if (op1 < 2)
|
|
op1 += 16;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (offset >= 0x80)
|
|
offset -= 0x100;
|
|
}
|
|
offset *= 2;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
int condition = (op1 != op2);
|
|
if (condition)
|
|
PC = PC + offset;
|
|
}
|
|
}
|
|
|
|
|
|
01100000,pppppppp,t,z:I8:16::BTEQZ
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int offset = (instruction >> 0) & 0xff;
|
|
signed_word op1 = 24;
|
|
signed_word op2 = 0;
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (offset >= 0x80)
|
|
offset -= 0x100;
|
|
}
|
|
offset *= 2;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
int condition = (op1 == op2);
|
|
if (condition)
|
|
PC = PC + offset;
|
|
}
|
|
}
|
|
|
|
|
|
01100001,pppppppp,t,z:I8:16::BTNEZ
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int offset = (instruction >> 0) & 0xff;
|
|
signed_word op1 = 24;
|
|
signed_word op2 = 0;
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (offset >= 0x80)
|
|
offset -= 0x100;
|
|
}
|
|
offset *= 2;
|
|
op1 = GPR[op1];
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
int condition = (op1 != op2);
|
|
if (condition)
|
|
PC = PC + offset;
|
|
}
|
|
}
|
|
|
|
|
|
00010,qqqqqqqqqqq,z,Z:I:16::B
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int offset = (instruction >> 0) & 0x7ff;
|
|
signed_word op2 = 0;
|
|
signed_word op1 = 0;
|
|
if (have_extendval)
|
|
{
|
|
offset |= ((extendval & 0x1f) << 11) | (extendval & 0x7e0);
|
|
if (offset >= 0x8000)
|
|
offset -= 0x10000;
|
|
have_extendval = 0;
|
|
}
|
|
else
|
|
{
|
|
if (offset >= 0x400)
|
|
offset -= 0x800;
|
|
}
|
|
offset *= 2;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
int condition = (op1 == op2);
|
|
if (condition)
|
|
PC = PC + offset;
|
|
}
|
|
}
|
|
|
|
|
|
// Special Instructions
|
|
|
|
|
|
// See the front of the mips16 doc
|
|
11110,eeeeeeeeeee:I:16::EXTEND
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
int ext = (instruction >> 0) & 0x7ff;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
extendval = ext;
|
|
have_extendval = 1;
|
|
}
|
|
}
|
|
|
|
|
|
01100,******,00101:RR:16::BREAK
|
|
*mips16:
|
|
{
|
|
unsigned32 instruction = instruction_0;
|
|
if (have_extendval)
|
|
SignalException (ReservedInstruction, instruction);
|
|
{
|
|
SignalException(BreakPoint,instruction);
|
|
}
|
|
}
|
|
|