704 lines
19 KiB
C
704 lines
19 KiB
C
/* Simulator/Opcode generator for the Hitachi Super-H architecture.
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Written by Steve Chamberlain of Cygnus Support.
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sac@cygnus.com
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This file is part of SH sim
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THIS SOFTWARE IS NOT COPYRIGHTED
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Cygnus offers the following for use in the public domain. Cygnus
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makes no warranty with regard to the software or it's performance
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and the user accepts the software "AS IS" with all faults.
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CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO
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THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* This program generates the opcode table for the assembler and
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the simulator code
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-t prints a pretty table for the assembler manual
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-s generates the simulator code jump table
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-x generates the simulator code switch statement
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default generates the opcode tables
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*/
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typedef struct
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{
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char *name;
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char *code;
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char *stuff[10];
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int index;
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}
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op;
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op tab[] =
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{
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{"add #<imm>,<REG_N>", "0111nnnni8*1....", "R[n] += SEXT(i);"},
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{"add <REG_M>,<REG_N>", "0011nnnnmmmm1100", "R[n] += R[m];"},
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{"addc <REG_M>,<REG_N>", "0011nnnnmmmm1110", "ult = R[n]; R[n] += (R[m]+T); T = ult>R[n];"},
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{"addv <REG_M>,<REG_N>", "0011nnnnmmmm1111",
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"long ans;",
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"ans = R[n] + R[m];",
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"T = ((~R[n] & R[m] & ans) | (R[n] & R[m] & ~ans)) >>31;",
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"R[n] = ans;"},
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{"and #<imm>,R0", "11001001i8*1....", "R0&=i;"},
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{"and <REG_M>,<REG_N>", "0010nnnnmmmm1001", "R[n]&=R[m];"},
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{"and.b #<imm>,@(R0,GBR)", "11001101i8*1....", "WBAT(GBR+R0, RBAT(GBR+R0) & i);"},
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{"bf <bdisp8>", "10001011i8p1....", "if(T==0) {PC+=(SEXT(i)<<1)+2;C+=2;}"},
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{"bra <bdisp12>", "1010i12.........", "ult = PC; PC=PC+(i<<1)+2;SL(ult+2);"},
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{"bsr <bdisp12>", "1011i12.........", "PR = PC; PC=PC+(i<<1)+2;SL(PR+2);"},
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{"bt <bdisp8>", "10001001i8p1....", "if(T==1) {PC+=(SEXT(i)<<1)+2;C+=2;}"},
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{"clrmac", "0000000000101000", "MACH = MACL = 0;"},
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{"clrt", "0000000000001000", "T= 0;"},
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{"cmp/eq #<imm>,R0", "10001000i8*1....", "T = R0 == SEXT(i);"},
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{"cmp/eq <REG_M>,<REG_N>", "0011nnnnmmmm0000", "T=R[n]==R[m];"},
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{"cmp/ge <REG_M>,<REG_N>", "0011nnnnmmmm0011", "T=R[n]>=R[m];"},
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{"cmp/gt <REG_M>,<REG_N>", "0011nnnnmmmm0111", "T=R[n]>R[m];"},
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{"cmp/hi <REG_M>,<REG_N>", "0011nnnnmmmm0110", "T=UR[n]>UR[m];"},
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{"cmp/hs <REG_M>,<REG_N>", "0011nnnnmmmm0010", "T=UR[n]>=UR[m];"},
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{"cmp/pl <REG_N>", "0100nnnn00010101", "T = R[n]>0;"},
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{"cmp/pz <REG_N>", "0100nnnn00010001", "T = R[n]>=0;"},
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{"cmp/str <REG_M>,<REG_N>", "0010nnnnmmmm1100", "ult = R[n] ^ R[m]; T=((ult&0xff000000)==0) |((ult&0xff0000)==0) |((ult&0xff00)==0) |((ult&0xff)==0); "},
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{"div0s <REG_M>,<REG_N>", "0010nnnnmmmm0111", "Q=R[n]<0; M=R[m]<0; T=M!=Q;;"},
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{"div0u", "0000000000011001", "M=Q=T=0;"},
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{"div1 <REG_M>,<REG_N>", "0011nnnnmmmm0100", "T=div1(R,n,m,T);"},
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{"exts.b <REG_M>,<REG_N>", "0110nnnnmmmm1110", "R[n] = SEXT(R[m]);"},
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{"exts.w <REG_M>,<REG_N>", "0110nnnnmmmm1111", "R[n] = SEXTW(R[m]);"},
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{"extu.b <REG_M>,<REG_N>", "0110nnnnmmmm1100", "R[n] = R[m] & 0xff;"},
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{"extu.w <REG_M>,<REG_N>", "0110nnnnmmmm1101", "R[n] = R[m] & 0xffff;"},
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{"jmp @<REG_N>", "0100nnnn00101011", "ult = PC; PC=R[n]-2; SL(ult+2);"},
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{"jsr @<REG_N>", "0100nnnn00001011", "PR = PC; PC=R[n]-2; SL(PR+2);"},
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{"ldc <REG_N>,GBR", "0100nnnn00011110", "GBR=R[n];"},
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{"ldc <REG_N>,SR", "0100nnnn00001110", "SET_SR(R[n]);"},
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{"ldc <REG_N>,VBR", "0100nnnn00101110", "VBR=R[n];"},
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{"ldc.l @<REG_N>+,GBR", "0100nnnn00010111", "GBR=RLAT(R[n]);R[n]+=4;;"},
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{"ldc.l @<REG_N>+,SR", "0100nnnn00000111", "SET_SR(RLAT(R[n]));R[n]+=4;;"},
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{"ldc.l @<REG_N>+,VBR", "0100nnnn00100111", "VBR=RLAT(R[n]);R[n]+=4;;"},
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{"lds <REG_N>,MACH", "0100nnnn00001010", "MACH = SEXT(R[n]);"},
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{"lds <REG_N>,MACL", "0100nnnn00011010", "MACL= R[n];"},
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{"lds <REG_N>,PR", "0100nnnn00101010", "PR = R[n];"},
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{"lds.l @<REG_N>+,MACH", "0100nnnn00000110", "MACH = SEXT(RLAT(R[n]));R[n]+=4;"},
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{"lds.l @<REG_N>+,MACL", "0100nnnn00010110", "MACL = RLAT(R[n]);R[n]+=4;"},
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{"lds.l @<REG_N>+,PR", "0100nnnn00100110", "PR = RLAT(R[n]);R[n]+=4;;"},
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{"mac.w @<REG_M>+,@<REG_N>+", "0100nnnnmmmm1111", "abort();"},
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{"mov #<imm>,<REG_N>", "1110nnnni8*1....", "R[n] = SEXT(i);"},
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{"mov <REG_M>,<REG_N>", "0110nnnnmmmm0011", "R[n] = R[m];"},
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{"mov.b <REG_M>,@(R0,<REG_N>)", "0000nnnnmmmm0100", "WBAT(R[n]+R0, R[m]);"},
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{"mov.b <REG_M>,@-<REG_N>", "0010nnnnmmmm0100", "R[n]--; WBAT(R[n], R[m]);"},
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{"mov.b <REG_M>,@<REG_N>", "0010nnnnmmmm0000", "WBAT(R[n], R[m]);"},
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{"mov.b @(<disp>,<REG_M>),R0", "10000100mmmmi4*1", "R0=RBAT(i+R[m]);"},
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{"mov.b @(<disp>,GBR),R0", "11000100i8*1....", "R0=RBAT(i+GBR);"},
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{"mov.b @(R0,<REG_M>),<REG_N>", "0000nnnnmmmm1100", "R[n]=RBAT(R0+R[m]);"},
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{"mov.b @<REG_M>+,<REG_N>", "0110nnnnmmmm0100", "R[n] = RBAT(R[m]);R[m]++;"},
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{"mov.b @<REG_M>,<REG_N>", "0110nnnnmmmm0000", "R[n]=RBAT(R[m]);"},
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{"mov.b R0,@(<disp>,<REG_M>)", "10000000mmmmi4*1", "R0=RBAT(i+R[m]);"},
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{"mov.b R0,@(<disp>,GBR)", "11000000i8*1....", "R0 = RBAT(i+GBR);"},
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{"mov.l <REG_M>,@(<disp>,<REG_N>)", "0001nnnnmmmmi4*4", "WLAT(i+R[n],R[m]);"},
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{"mov.l <REG_M>,@(R0,<REG_N>)", "0000nnnnmmmm0110", "WLAT(R0+R[n],R[m]);"},
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{"mov.l <REG_M>,@-<REG_N>", "0010nnnnmmmm0110", "R[n]-=4;WLAT(R[n],R[m]);"},
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{"mov.l <REG_M>,@<REG_N>", "0010nnnnmmmm0010", "WLAT(R[n], R[m]);"},
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{"mov.l @(<disp>,<REG_N>),<REG_M>", "0101nnnnmmmmi4*4", "R[m]=RLAT(i+R[n]);"},
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{"mov.l @(<disp>,GBR),R0", "11000110i4*4", "R0=RLAT(i+GBR);"},
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{"mov.l @(<disp>,PC),<REG_N>", "1101nnnni8p4....", "R[n]=RLAT(i+4+PC);"},
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{"mov.l @(R0,<REG_M>),<REG_N>", "0000nnnnmmmm1110", "R[n]=RLAT(R0+R[m]);"},
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{"mov.l @<REG_M>+,<REG_N>", "0110nnnnmmmm0110", "R[n]=RLAT(R[m]);R[m]+=4;"},
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{"mov.l @<REG_M>,<REG_N>", "0110nnnnmmmm0010", "R[n]=RLAT(R[m]);"},
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{"mov.l R0,@(<disp>,GBR)", "11000010i8*4....", "R0=RLAT(R0+GBR);"},
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{"mov.w <REG_M>,@(R0,<REG_N>)", "0000nnnnmmmm0101", "WWAT(R0+R[n],R[m]);"},
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{"mov.w <REG_M>,@-<REG_N>", "0010nnnnmmmm0101", "R[n]-=2;WWAT(R[n],R[m]);"},
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{"mov.w <REG_M>,@<REG_N>", "0010nnnnmmmm0001", "WWAT(R[n],R[m]);"},
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{"mov.w @(<disp>,<REG_M>),R0", "10000101mmmmi4*2", "R0=RSWAT(i+R[m]);"},
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{"mov.w @(<disp>,GBR),R0", "11000101i8*2....", "R0=RSWAT(i+GBR);"},
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{"mov.w @(<disp>,PC),<REG_N>", "1001nnnni8p2....", "R[n]=RSWAT(PC+i+4);"},
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{"mov.w @(R0,<REG_M>),<REG_N>", "0000nnnnmmmm1101", "R[n]=RSWAT(R0+R[m]);"},
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{"mov.w @<REG_M>+,<REG_N>", "0110nnnnmmmm0101", "R[n]=RSWAT(R[m]);R[m]+=2;"},
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{"mov.w @<REG_M>,<REG_N>", "0110nnnnmmmm0001", "R[n]=RSWAT(R[m]);"},
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{"mov.w R0,@(<disp>,<REG_M>)", "10000001mmmmi4*2", "R0=RSWAT(i+R[m]);"},
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{"mov.w R0,@(<disp>,GBR)", "11000001i8*2....", "R0=RSWAT(i+GBR);"},
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{"mova @(<disp>,PC),R0", "11000111i8p4....", "R0=i+4+PC;"},
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{"movt <REG_N>", "0000nnnn00101001", "R[n]=T;"},
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{"muls <REG_M>,<REG_N>", "0010nnnnmmmm1111",
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"MACL=((long)(short)R[n])*((long)(short)R[m]);"},
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{"mulu <REG_M>,<REG_N>","0010nnnnmmmm1110", "MACL=((unsigned long)(unsigned short)R[n])*((unsigned long)(unsigned short)R[m]);"},
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{"neg <REG_M>,<REG_N>", "0110nnnnmmmm1011", "R[n] = - R[m];"},
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{"negc <REG_M>,<REG_N>", "0110nnnnmmmm1010", "ult=0-R[m];R[n]=ult-T;T=SBIT(R[n])!=SBIT(ult);"},
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{"nop", "0000000000001001", ""},
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{"not <REG_M>,<REG_N>", "0110nnnnmmmm0111", "R[n]=~R[m];"},
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{"or #<imm>,R0", "11001011i8*1....", "R0|=i;"},
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{"or <REG_M>,<REG_N>", "0010nnnnmmmm1011", "R[n]|=R[m];"},
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{"or.b #<imm>,@(R0,GBR)", "11001111i8*1....", "WBAT(R0+GBR,RBAT(R0+GBR)|i);"},
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{"rotcl <REG_N>", "0100nnnn00100100", "ult = R[n] <0;R[n] = (R[n]<<1)|T;T=ult;"},
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{"rotcr <REG_N>", "0100nnnn00100101", "ult = R[n]&1;R[n]=(UR[n]>>1)|(T<<31);T=ult;"},
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{"rotl <REG_N>", "0100nnnn00000100", "T=R[n]<0;R[n]<<=1;R[n]|=T;"},
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{"rotr <REG_N>", "0100nnnn00000101", "T=R[n]&1;UR[n]>>=1;R[n]|=(T<<31);"},
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{"rte", "0000000000101011", "abort();"},
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{"rts", "0000000000001011", "ult=PC;PC=PR+2;SL(ult+2);"},
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{"sett", "0000000000011000", "T=1;"},
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{"shal <REG_N>", "0100nnnn00100000", "T=R[n]<0; R[n]<<=1;"},
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{"shar <REG_N>", "0100nnnn00100001", "T=R[n]&1; R[n]>>=1;"},
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{"shll <REG_N>", "0100nnnn00000000", "T=R[n]<0; R[n]<<=1;"},
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{"shll16 <REG_N>", "0100nnnn00101000", "R[n]<<=16;"},
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{"shll2 <REG_N>", "0100nnnn00001000", "R[n]<<=2;"},
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{"shll8 <REG_N>", "0100nnnn00011000", "R[n]<<=8;"},
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{"shlr <REG_N>", "0100nnnn00000001", "T=R[n]&1;R[n]=UR[n]>>1;"},
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{"shlr16 <REG_N>", "0100nnnn00101001", "R[n]=UR[n]>>16;"},
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{"shlr2 <REG_N>", "0100nnnn00001001", "R[n]=UR[n]>>2;"},
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{"shlr8 <REG_N>", "0100nnnn00011001", "R[n]=UR[n]>>8;"},
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{"sleep", "0000000000011011", "abort();"},
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{"stc GBR,<REG_N>", "0000nnnn00010010", "R[n]=GBR;"},
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{"stc SR,<REG_N>", "0000nnnn00000010", "R[n]=GET_SR();"},
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{"stc VBR,<REG_N>", "0000nnnn00100010", "R[n]=VBR;"},
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{"stc.l GBR,@-<REG_N>", "0100nnnn00010011", "R[n]-=4;WLAT(R[n],GBR);;"},
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{"stc.l SR,@-<REG_N>", "0100nnnn00000011", "R[n]-=4;WLAT(R[n],GET_SR());"},
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{"stc.l VBR,@-<REG_N>", "0100nnnn00100011", "R[n]-=4;WLAT(R[n],VBR);"},
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{"sts MACH,<REG_N>", "0000nnnn00001010", "R[n]=MACH;"},
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{"sts MACL,<REG_N>", "0000nnnn00011010", "R[n]=MACL;"},
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{"sts PR,<REG_N>", "0000nnnn00101010", "R[n]=PR;"},
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{"sts.l MACH,@-<REG_N>", "0100nnnn00000010", "R[n]-=4;WLAT(R[n],MACH);"},
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{"sts.l MACL,@-<REG_N>", "0100nnnn00010010", "R[n]-=4;WLAT(R[n],MACL);"},
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{"sts.l PR,@-<REG_N>", "0100nnnn00100010", "R[n]-=4;WLAT(R[n],PR);"},
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{"sub <REG_M>,<REG_N>", "0011nnnnmmmm1000", "R[n]-=R[m];"},
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{"subc <REG_M>,<REG_N>", "0011nnnnmmmm1010", "ult = R[n];R[n]-=R[m]+T;T=ult<UR[n];"},
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{"subv <REG_M>,<REG_N>", "0011nnnnmmmm1011", "abort();"},
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{"swap.b <REG_M>,<REG_N>", "0110nnnnmmmm1000", "R[n]=((R[m]<<8)&0xff00)|((R[m]>>8)&0x00ff);"},
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{"swap.w <REG_M>,<REG_N>", "0110nnnnmmmm1001", "R[n]=((R[m]<<16)&0xffff0000)|((R[m]>>16)&0x00ffff);"},
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{"tas.b @<REG_N>", "0100nnnn00011011", "ult=RBAT(R[n]);T=ult==0;WBAT(R[n],ult|0x80);"},
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{"trapa #<imm>", "11000011i8*1....", "trap(i,R);"},
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{"tst #<imm>,R0", "11001000i8*1....", "T=(R0&i)==0;"},
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{"tst <REG_M>,<REG_N>", "0010nnnnmmmm1000", "T=(R[n]&R[m])==0;"},
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{"tst.b #<imm>,@(R0,GBR)", "11001100i8*1....", "T=(RBAT(GBR+R0)&i)==0;"},
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{"xor #<imm>,R0", "11001010i8*1....", "R0^=i;"},
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{"xor <REG_M>,<REG_N>", "0010nnnnmmmm1010", "R[n]^=R[m];"},
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{"xor.b #<imm>,@(R0,GBR)", "11001110i8*1....", "ult=RBAT(GBR+R0);ult^=i;WBAT(GBR+R0,ult);"},
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{"xtrct <REG_M>,<REG_N>", "0010nnnnmmmm1101", "R[n]=((R[n]>>16)&0xffff)|((R[m]<<16)&0xffff0000);"},
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#if 0
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{"mul.l <REG_M>,<REG_N>","0000nnnnmmmm0111","/* mull */"},
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{"dmuls.l <REG_M>,<REG_N>","0011nnnnmmmm1101","/* dmuls.l */"},
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{"dmulu.l <REG_M>,<REG_N>","0011nnnnmmmm0101",""},
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{"mac.l @<REG_M>+,@<REG_N>+","0000nnnnmmmm1111",""},
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{"bt/s <bdisp8>","10001101i8p1....",""},
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{"bf/s <bdisp8>","10001111i8p1....",""},
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{"dt <REG_N>","0100nnnn00010000",""},
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{"braf @<REG_N>","0000nnnn00100011",""},
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{"bsrf @<REG_N>","0000nnnn00000011",""},
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{"mulu <REG_M>,<REG_N>","0010nnnnmmmm1110",""},
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{"muls <REG_M>,<REG_N>","0010nnnnmmmm1111",""},
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#endif
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{0, 0}};
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/* Tables of things to put into enums for sh-opc.h */
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static char *nibble_type_list[] =
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{
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"HEX_0",
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"HEX_1",
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"HEX_2",
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"HEX_3",
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"HEX_4",
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"HEX_5",
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"HEX_6",
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"HEX_7",
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"HEX_8",
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"HEX_9",
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"HEX_A",
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"HEX_B",
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"HEX_C",
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"HEX_D",
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"HEX_E",
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"HEX_F",
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"REG_N",
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"REG_M",
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"BRANCH_12",
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"BRANCH_8",
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"DISP_8",
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"DISP_4",
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"IMM_4",
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"IMM_4BY2",
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"IMM_4BY4",
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"PCRELIMM_8BY2",
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"PCRELIMM_8BY4",
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"IMM_8",
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"IMM_8BY2",
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"IMM_8BY4",
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0
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};
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static
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char *arg_type_list[] =
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{
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"A_END",
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"A_BDISP12",
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"A_BDISP8",
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"A_DEC_M",
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"A_DEC_N",
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"A_DISP_GBR",
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"A_DISP_PC",
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"A_DISP_REG_M",
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"A_DISP_REG_N",
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"A_GBR",
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"A_IMM",
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"A_INC_M",
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"A_INC_N",
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"A_IND_M",
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"A_IND_N",
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"A_IND_R0_REG_M",
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"A_IND_R0_REG_N",
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"A_MACH",
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"A_MACL",
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"A_PR",
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"A_R0",
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"A_R0_GBR",
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"A_REG_M",
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"A_REG_N",
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"A_SR",
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"A_VBR",
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0,
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};
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static void
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make_enum_list (name, s)
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char *name;
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char **s;
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{
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int i = 1;
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printf ("typedef enum {\n");
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while (*s)
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{
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printf ("\t%s,\n", *s, i);
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s++;
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i++;
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}
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printf ("} %s;\n", name);
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}
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static void
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gengastab ()
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{
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op *p;
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sorttab ();
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for (p = tab; p->name; p++)
|
|
{
|
|
printf ("%s %-30s\n", p->code, p->name);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
static void
|
|
genopc ()
|
|
{
|
|
op *p;
|
|
make_enum_list ("sh_nibble_type", nibble_type_list);
|
|
make_enum_list ("sh_arg_type", arg_type_list);
|
|
|
|
printf ("typedef struct {\n");
|
|
printf ("char *name;\n");
|
|
printf ("sh_arg_type arg[3];\n");
|
|
printf ("sh_nibble_type nibbles[4];\n");
|
|
printf ("} sh_opcode_info;\n");
|
|
printf ("#ifdef DEFINE_TABLE\n");
|
|
printf ("sh_opcode_info sh_table[]={\n");
|
|
for (p = tab; p->name; p++)
|
|
{
|
|
printf ("\n\/\* %s %-20s*/", p->code, p->name);
|
|
think (p);
|
|
}
|
|
printf ("0};\n");
|
|
printf ("#endif\n");
|
|
}
|
|
|
|
|
|
m (ptr, a, rep)
|
|
char **ptr;
|
|
char *a;
|
|
char *rep;
|
|
{
|
|
int l = strlen (a);
|
|
if (strncmp (*ptr, a, l) == 0)
|
|
{
|
|
printf ("%s", rep);
|
|
*ptr += l;
|
|
if (**ptr)
|
|
printf (",");
|
|
}
|
|
}
|
|
|
|
think (o)
|
|
op *o;
|
|
{
|
|
int t;
|
|
char *n;
|
|
char *p;
|
|
|
|
printf ("{\"");
|
|
n = o->name;
|
|
while (*n && *n != ' ')
|
|
{
|
|
printf ("%c", *n);
|
|
n++;
|
|
}
|
|
printf ("\",{");
|
|
|
|
p = n;
|
|
|
|
if (!*p)
|
|
{
|
|
printf ("0");
|
|
}
|
|
while (*p)
|
|
{
|
|
while (*p == ',' || *p == ' ')
|
|
p++;
|
|
m (&p, "#<imm>", "A_IMM");
|
|
m (&p, "R0", "A_R0");
|
|
m (&p, "<REG_N>", "A_REG_N");
|
|
m (&p, "@<REG_N>+", "A_INC_N");
|
|
m (&p, "@<REG_N>", "A_IND_N");
|
|
m (&p, "@-<REG_N>", "A_DEC_N");
|
|
m (&p, "<REG_M>", " A_REG_M");
|
|
m (&p, "@<REG_M>+", "A_INC_M");
|
|
m (&p, "@<REG_M>", "A_IND_M");
|
|
m (&p, "@-<REG_M>", "A_DEC_M");
|
|
m (&p, "@(<disp>,PC)", "A_DISP_PC");
|
|
m (&p, "@(<disp>,<REG_M>)", "A_DISP_REG_M");
|
|
m (&p, "@(<disp>,<REG_N>)", "A_DISP_REG_N");
|
|
m (&p, "@(R0,<REG_N>)", "A_IND_R0_REG_N");
|
|
m (&p, "@(R0,<REG_M>)", "A_IND_R0_REG_M");
|
|
m (&p, "@(<disp>,GBR)", "A_DISP_GBR");
|
|
m (&p, "@(R0,GBR)", "A_R0_GBR");
|
|
m (&p, "<bdisp8>", "A_BDISP8");
|
|
m (&p, "<bdisp12>", "A_BDISP12");
|
|
m (&p, "SR", "A_SR");
|
|
m (&p, "GBR", "A_GBR");
|
|
m (&p, "VBR", "A_VBR");
|
|
m (&p, "MACH", "A_MACH");
|
|
m (&p, "MACL", "A_MACL");
|
|
m (&p, "PR", "A_PR");
|
|
|
|
}
|
|
printf ("},{");
|
|
|
|
p = o->code;
|
|
while (*p)
|
|
{
|
|
m (&p, "0000", "HEX_0");
|
|
m (&p, "0001", "HEX_1");
|
|
m (&p, "0010", "HEX_2");
|
|
m (&p, "0011", "HEX_3");
|
|
m (&p, "0100", "HEX_4");
|
|
m (&p, "0101", "HEX_5");
|
|
m (&p, "0110", "HEX_6");
|
|
m (&p, "0111", "HEX_7");
|
|
|
|
m (&p, "1000", "HEX_8");
|
|
m (&p, "1001", "HEX_9");
|
|
m (&p, "1010", "HEX_A");
|
|
m (&p, "1011", "HEX_B");
|
|
m (&p, "1100", "HEX_C");
|
|
m (&p, "1101", "HEX_D");
|
|
m (&p, "1110", "HEX_E");
|
|
m (&p, "1111", "HEX_F");
|
|
m (&p, "i8*1....", "IMM_8");
|
|
m (&p, "i4*1", "IMM_4");
|
|
m (&p, "i8p4....", "PCRELIMM_8BY4");
|
|
m (&p, "i8p2....", "PCRELIMM_8BY2");
|
|
m (&p, "i8*2....", "IMM_8BY2");
|
|
m (&p, "i4*2", "IMM_4BY2");
|
|
m (&p, "i8*4....", "IMM_8BY4");
|
|
m (&p, "i4*4", "IMM_4BY4");
|
|
m (&p, "i12.........", "BRANCH_12");
|
|
m (&p, "i8p1....", "BRANCH_8");
|
|
m (&p, "nnnn", "REG_N");
|
|
m (&p, "mmmm", "REG_M");
|
|
|
|
}
|
|
printf ("}},\n");
|
|
}
|
|
|
|
qfunc (a, b)
|
|
op *a;
|
|
op *b;
|
|
{
|
|
char bufa[9];
|
|
char bufb[9];
|
|
memcpy (bufa, a->code, 4);
|
|
memcpy (bufa + 4, a->code + 12, 4);
|
|
bufa[8] = 0;
|
|
|
|
memcpy (bufb, b->code, 4);
|
|
memcpy (bufb + 4, b->code + 12, 4);
|
|
bufb[8] = 0;
|
|
return (strcmp (bufa, bufb));
|
|
}
|
|
|
|
|
|
sorttab ()
|
|
{
|
|
op *p = tab;
|
|
|
|
int len = 0;
|
|
|
|
while (p->name)
|
|
{
|
|
p++;
|
|
len++;
|
|
}
|
|
|
|
qsort (tab, len, sizeof (*p), qfunc);
|
|
|
|
}
|
|
|
|
/* Convert a string of 4 binary digits into an int */
|
|
|
|
static
|
|
int
|
|
bton (s)
|
|
char *s;
|
|
|
|
{
|
|
int n = 0;
|
|
int v = 8;
|
|
while (v)
|
|
{
|
|
if (*s == '1')
|
|
n |= v;
|
|
v >>= 1;
|
|
s++;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
static char table[1 << 16];
|
|
|
|
/* Take an opcode expand all varying fields in it out and fill all the
|
|
right entries in 'table' with the opcode index*/
|
|
|
|
expand_opcode (shift, val, i, s)
|
|
char *s;
|
|
{
|
|
int j;
|
|
|
|
if (*s == 0)
|
|
{
|
|
table[val] = i;
|
|
}
|
|
else
|
|
{
|
|
switch (s[0])
|
|
{
|
|
|
|
case '0':
|
|
case '1':
|
|
{
|
|
|
|
int n = bton (s);
|
|
if (n >= 0)
|
|
{
|
|
expand_opcode (shift - 4, val | (n << shift), i, s + 4);
|
|
}
|
|
break;
|
|
}
|
|
case 'n':
|
|
case 'm':
|
|
for (j = 0; j < 16; j++)
|
|
{
|
|
expand_opcode (shift - 4, val | (j << shift), i, s + 4);
|
|
|
|
}
|
|
break;
|
|
|
|
default:
|
|
for (j = 0; j < (1 << (shift + 4)); j++)
|
|
{
|
|
table[val | j] = i;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Print the jump table used to index an opcode into a switch
|
|
statement entry */
|
|
static void
|
|
|
|
dumptable ()
|
|
{
|
|
int lump = 256;
|
|
int online = 16;
|
|
|
|
int i = 0;
|
|
|
|
while (i < 1 << 16)
|
|
{
|
|
int j = 0;
|
|
int nc = 0;
|
|
|
|
printf ("unsigned char sh_jump_table%x[%d]={\n", i, lump);
|
|
|
|
while (j < lump)
|
|
{
|
|
int k = 0;
|
|
while (k < online)
|
|
{
|
|
printf ("%2d", table[i + j + k]);
|
|
if (j + k < lump)
|
|
printf (",");
|
|
|
|
k++;
|
|
}
|
|
j += k;
|
|
printf ("\n");
|
|
}
|
|
i += j;
|
|
printf ("};\n");
|
|
}
|
|
|
|
}
|
|
|
|
|
|
static void
|
|
filltable ()
|
|
{
|
|
op *p;
|
|
int index = 1;
|
|
|
|
sorttab ();
|
|
for (p = tab; p->name; p++)
|
|
{
|
|
p->index = index++;
|
|
expand_opcode (12, 0, p->index, p->code);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gensim ()
|
|
{
|
|
op *p;
|
|
int j;
|
|
|
|
printf ("{\n");
|
|
printf ("switch (jump_table[iword]) {\n");
|
|
|
|
for (p = tab; p->name; p++)
|
|
{
|
|
int sextbit = -1;
|
|
|
|
char *s = p->code;
|
|
|
|
printf ("\/\* %s %s *\/\n", p->name, p->code);
|
|
printf ("case %d: \n", p->index);
|
|
|
|
printf ("{\n");
|
|
while (*s)
|
|
{
|
|
switch (*s)
|
|
{
|
|
case '0':
|
|
case '1':
|
|
case '.':
|
|
s += 4;
|
|
break;
|
|
case 'n':
|
|
printf ("int n = (iword >>8) & 0xf;\n");
|
|
s += 4;
|
|
break;
|
|
case 'm':
|
|
printf ("int m = (iword >>4) & 0xf;\n");
|
|
s += 4;
|
|
|
|
break;
|
|
|
|
case 'i':
|
|
printf ("int i = (iword & 0x");
|
|
|
|
switch (s[1])
|
|
{
|
|
case '4':
|
|
printf ("f");
|
|
break;
|
|
case '8':
|
|
printf ("ff");
|
|
break;
|
|
case '1':
|
|
sextbit = 12;
|
|
|
|
printf ("fff");
|
|
break;
|
|
}
|
|
printf (")");
|
|
|
|
switch (s[3])
|
|
{
|
|
case '1':
|
|
break;
|
|
case '2':
|
|
printf ("<<1");
|
|
break;
|
|
case '4':
|
|
printf ("<<2");
|
|
break;
|
|
}
|
|
printf (";\n");
|
|
s += 4;
|
|
}
|
|
}
|
|
if (sextbit>0)
|
|
{
|
|
printf("i = (i ^ (1<<%d))-(1<<%d);\n",sextbit-1,sextbit-1);
|
|
}
|
|
|
|
for (j = 0; j < 10; j++)
|
|
{
|
|
if (p->stuff[j])
|
|
{
|
|
printf ("%s\n", p->stuff[j]);
|
|
}
|
|
}
|
|
printf ("break;\n", p->stuff);
|
|
printf ("}\n");
|
|
}
|
|
printf ("}\n}\n");
|
|
}
|
|
|
|
|
|
int
|
|
main (ac, av)
|
|
char **av;
|
|
|
|
{
|
|
if (ac > 1)
|
|
{
|
|
if (strcmp (av[1], "-t") == 0)
|
|
{
|
|
gengastab ();
|
|
}
|
|
else if (strcmp (av[1], "-s") == 0)
|
|
{
|
|
filltable ();
|
|
dumptable ();
|
|
|
|
}
|
|
else if (strcmp (av[1], "-x") == 0)
|
|
{
|
|
filltable ();
|
|
gensim ();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
genopc ();
|
|
}
|
|
return 0;
|
|
}
|