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qemu-e2k/target-mips/translate.c
ths 5dc4b74480 Scrap SIGN_EXTEND32. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2251 c046a42c-6fe2-441c-8c8c-71466251a162
2006-12-21 13:48:28 +00:00

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/*
* MIPS32 emulation for qemu: main translation routines.
*
* Copyright (c) 2004-2005 Jocelyn Mayer
* Copyright (c) 2006 Marius Groeger (FPU operations)
* Copyright (c) 2006 Thiemo Seufer (MIPS32R2 support)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "cpu.h"
#include "exec-all.h"
#include "disas.h"
//#define MIPS_DEBUG_DISAS
//#define MIPS_DEBUG_SIGN_EXTENSIONS
//#define MIPS_SINGLE_STEP
#ifdef USE_DIRECT_JUMP
#define TBPARAM(x)
#else
#define TBPARAM(x) (long)(x)
#endif
enum {
#define DEF(s, n, copy_size) INDEX_op_ ## s,
#include "opc.h"
#undef DEF
NB_OPS,
};
static uint16_t *gen_opc_ptr;
static uint32_t *gen_opparam_ptr;
#include "gen-op.h"
/* MIPS major opcodes */
#define MASK_OP_MAJOR(op) (op & (0x3F << 26))
enum {
/* indirect opcode tables */
OPC_SPECIAL = (0x00 << 26),
OPC_REGIMM = (0x01 << 26),
OPC_CP0 = (0x10 << 26),
OPC_CP1 = (0x11 << 26),
OPC_CP2 = (0x12 << 26),
OPC_CP3 = (0x13 << 26),
OPC_SPECIAL2 = (0x1C << 26),
OPC_SPECIAL3 = (0x1F << 26),
/* arithmetic with immediate */
OPC_ADDI = (0x08 << 26),
OPC_ADDIU = (0x09 << 26),
OPC_SLTI = (0x0A << 26),
OPC_SLTIU = (0x0B << 26),
OPC_ANDI = (0x0C << 26),
OPC_ORI = (0x0D << 26),
OPC_XORI = (0x0E << 26),
OPC_LUI = (0x0F << 26),
OPC_DADDI = (0x18 << 26),
OPC_DADDIU = (0x19 << 26),
/* Jump and branches */
OPC_J = (0x02 << 26),
OPC_JAL = (0x03 << 26),
OPC_BEQ = (0x04 << 26), /* Unconditional if rs = rt = 0 (B) */
OPC_BEQL = (0x14 << 26),
OPC_BNE = (0x05 << 26),
OPC_BNEL = (0x15 << 26),
OPC_BLEZ = (0x06 << 26),
OPC_BLEZL = (0x16 << 26),
OPC_BGTZ = (0x07 << 26),
OPC_BGTZL = (0x17 << 26),
OPC_JALX = (0x1D << 26), /* MIPS 16 only */
/* Load and stores */
OPC_LDL = (0x1A << 26),
OPC_LDR = (0x1B << 26),
OPC_LB = (0x20 << 26),
OPC_LH = (0x21 << 26),
OPC_LWL = (0x22 << 26),
OPC_LW = (0x23 << 26),
OPC_LBU = (0x24 << 26),
OPC_LHU = (0x25 << 26),
OPC_LWR = (0x26 << 26),
OPC_LWU = (0x27 << 26),
OPC_SB = (0x28 << 26),
OPC_SH = (0x29 << 26),
OPC_SWL = (0x2A << 26),
OPC_SW = (0x2B << 26),
OPC_SDL = (0x2C << 26),
OPC_SDR = (0x2D << 26),
OPC_SWR = (0x2E << 26),
OPC_LL = (0x30 << 26),
OPC_LLD = (0x34 << 26),
OPC_LD = (0x37 << 26),
OPC_SC = (0x38 << 26),
OPC_SCD = (0x3C << 26),
OPC_SD = (0x3F << 26),
/* Floating point load/store */
OPC_LWC1 = (0x31 << 26),
OPC_LWC2 = (0x32 << 26),
OPC_LDC1 = (0x35 << 26),
OPC_LDC2 = (0x36 << 26),
OPC_SWC1 = (0x39 << 26),
OPC_SWC2 = (0x3A << 26),
OPC_SDC1 = (0x3D << 26),
OPC_SDC2 = (0x3E << 26),
/* MDMX ASE specific */
OPC_MDMX = (0x1E << 26),
/* Cache and prefetch */
OPC_CACHE = (0x2F << 26),
OPC_PREF = (0x33 << 26),
/* Reserved major opcode */
OPC_MAJOR3B_RESERVED = (0x3B << 26),
};
/* MIPS special opcodes */
#define MASK_SPECIAL(op) MASK_OP_MAJOR(op) | (op & 0x3F)
enum {
/* Shifts */
OPC_SLL = 0x00 | OPC_SPECIAL,
/* NOP is SLL r0, r0, 0 */
/* SSNOP is SLL r0, r0, 1 */
/* EHB is SLL r0, r0, 3 */
OPC_SRL = 0x02 | OPC_SPECIAL, /* also ROTR */
OPC_SRA = 0x03 | OPC_SPECIAL,
OPC_SLLV = 0x04 | OPC_SPECIAL,
OPC_SRLV = 0x06 | OPC_SPECIAL,
OPC_SRAV = 0x07 | OPC_SPECIAL,
OPC_DSLLV = 0x14 | OPC_SPECIAL,
OPC_DSRLV = 0x16 | OPC_SPECIAL, /* also DROTRV */
OPC_DSRAV = 0x17 | OPC_SPECIAL,
OPC_DSLL = 0x38 | OPC_SPECIAL,
OPC_DSRL = 0x3A | OPC_SPECIAL, /* also DROTR */
OPC_DSRA = 0x3B | OPC_SPECIAL,
OPC_DSLL32 = 0x3C | OPC_SPECIAL,
OPC_DSRL32 = 0x3E | OPC_SPECIAL, /* also DROTR32 */
OPC_DSRA32 = 0x3F | OPC_SPECIAL,
/* Multiplication / division */
OPC_MULT = 0x18 | OPC_SPECIAL,
OPC_MULTU = 0x19 | OPC_SPECIAL,
OPC_DIV = 0x1A | OPC_SPECIAL,
OPC_DIVU = 0x1B | OPC_SPECIAL,
OPC_DMULT = 0x1C | OPC_SPECIAL,
OPC_DMULTU = 0x1D | OPC_SPECIAL,
OPC_DDIV = 0x1E | OPC_SPECIAL,
OPC_DDIVU = 0x1F | OPC_SPECIAL,
/* 2 registers arithmetic / logic */
OPC_ADD = 0x20 | OPC_SPECIAL,
OPC_ADDU = 0x21 | OPC_SPECIAL,
OPC_SUB = 0x22 | OPC_SPECIAL,
OPC_SUBU = 0x23 | OPC_SPECIAL,
OPC_AND = 0x24 | OPC_SPECIAL,
OPC_OR = 0x25 | OPC_SPECIAL,
OPC_XOR = 0x26 | OPC_SPECIAL,
OPC_NOR = 0x27 | OPC_SPECIAL,
OPC_SLT = 0x2A | OPC_SPECIAL,
OPC_SLTU = 0x2B | OPC_SPECIAL,
OPC_DADD = 0x2C | OPC_SPECIAL,
OPC_DADDU = 0x2D | OPC_SPECIAL,
OPC_DSUB = 0x2E | OPC_SPECIAL,
OPC_DSUBU = 0x2F | OPC_SPECIAL,
/* Jumps */
OPC_JR = 0x08 | OPC_SPECIAL, /* Also JR.HB */
OPC_JALR = 0x09 | OPC_SPECIAL, /* Also JALR.HB */
/* Traps */
OPC_TGE = 0x30 | OPC_SPECIAL,
OPC_TGEU = 0x31 | OPC_SPECIAL,
OPC_TLT = 0x32 | OPC_SPECIAL,
OPC_TLTU = 0x33 | OPC_SPECIAL,
OPC_TEQ = 0x34 | OPC_SPECIAL,
OPC_TNE = 0x36 | OPC_SPECIAL,
/* HI / LO registers load & stores */
OPC_MFHI = 0x10 | OPC_SPECIAL,
OPC_MTHI = 0x11 | OPC_SPECIAL,
OPC_MFLO = 0x12 | OPC_SPECIAL,
OPC_MTLO = 0x13 | OPC_SPECIAL,
/* Conditional moves */
OPC_MOVZ = 0x0A | OPC_SPECIAL,
OPC_MOVN = 0x0B | OPC_SPECIAL,
OPC_MOVCI = 0x01 | OPC_SPECIAL,
/* Special */
OPC_PMON = 0x05 | OPC_SPECIAL, /* inofficial */
OPC_SYSCALL = 0x0C | OPC_SPECIAL,
OPC_BREAK = 0x0D | OPC_SPECIAL,
OPC_SPIM = 0x0E | OPC_SPECIAL, /* inofficial */
OPC_SYNC = 0x0F | OPC_SPECIAL,
OPC_SPECIAL15_RESERVED = 0x15 | OPC_SPECIAL,
OPC_SPECIAL28_RESERVED = 0x28 | OPC_SPECIAL,
OPC_SPECIAL29_RESERVED = 0x29 | OPC_SPECIAL,
OPC_SPECIAL35_RESERVED = 0x35 | OPC_SPECIAL,
OPC_SPECIAL37_RESERVED = 0x37 | OPC_SPECIAL,
OPC_SPECIAL39_RESERVED = 0x39 | OPC_SPECIAL,
OPC_SPECIAL3D_RESERVED = 0x3D | OPC_SPECIAL,
};
/* REGIMM (rt field) opcodes */
#define MASK_REGIMM(op) MASK_OP_MAJOR(op) | (op & (0x1F << 16))
enum {
OPC_BLTZ = (0x00 << 16) | OPC_REGIMM,
OPC_BLTZL = (0x02 << 16) | OPC_REGIMM,
OPC_BGEZ = (0x01 << 16) | OPC_REGIMM,
OPC_BGEZL = (0x03 << 16) | OPC_REGIMM,
OPC_BLTZAL = (0x10 << 16) | OPC_REGIMM,
OPC_BLTZALL = (0x12 << 16) | OPC_REGIMM,
OPC_BGEZAL = (0x11 << 16) | OPC_REGIMM,
OPC_BGEZALL = (0x13 << 16) | OPC_REGIMM,
OPC_TGEI = (0x08 << 16) | OPC_REGIMM,
OPC_TGEIU = (0x09 << 16) | OPC_REGIMM,
OPC_TLTI = (0x0A << 16) | OPC_REGIMM,
OPC_TLTIU = (0x0B << 16) | OPC_REGIMM,
OPC_TEQI = (0x0C << 16) | OPC_REGIMM,
OPC_TNEI = (0x0E << 16) | OPC_REGIMM,
OPC_SYNCI = (0x1F << 16) | OPC_REGIMM,
};
/* Special2 opcodes */
#define MASK_SPECIAL2(op) MASK_OP_MAJOR(op) | (op & 0x3F)
enum {
/* Multiply & xxx operations */
OPC_MADD = 0x00 | OPC_SPECIAL2,
OPC_MADDU = 0x01 | OPC_SPECIAL2,
OPC_MUL = 0x02 | OPC_SPECIAL2,
OPC_MSUB = 0x04 | OPC_SPECIAL2,
OPC_MSUBU = 0x05 | OPC_SPECIAL2,
/* Misc */
OPC_CLZ = 0x20 | OPC_SPECIAL2,
OPC_CLO = 0x21 | OPC_SPECIAL2,
OPC_DCLZ = 0x24 | OPC_SPECIAL2,
OPC_DCLO = 0x25 | OPC_SPECIAL2,
/* Special */
OPC_SDBBP = 0x3F | OPC_SPECIAL2,
};
/* Special3 opcodes */
#define MASK_SPECIAL3(op) MASK_OP_MAJOR(op) | (op & 0x3F)
enum {
OPC_EXT = 0x00 | OPC_SPECIAL3,
OPC_DEXTM = 0x01 | OPC_SPECIAL3,
OPC_DEXTU = 0x02 | OPC_SPECIAL3,
OPC_DEXT = 0x03 | OPC_SPECIAL3,
OPC_INS = 0x04 | OPC_SPECIAL3,
OPC_DINSM = 0x05 | OPC_SPECIAL3,
OPC_DINSU = 0x06 | OPC_SPECIAL3,
OPC_DINS = 0x07 | OPC_SPECIAL3,
OPC_BSHFL = 0x20 | OPC_SPECIAL3,
OPC_DBSHFL = 0x24 | OPC_SPECIAL3,
OPC_RDHWR = 0x3B | OPC_SPECIAL3,
};
/* BSHFL opcodes */
#define MASK_BSHFL(op) MASK_SPECIAL3(op) | (op & (0x1F << 6))
enum {
OPC_WSBH = (0x02 << 6) | OPC_BSHFL,
OPC_SEB = (0x10 << 6) | OPC_BSHFL,
OPC_SEH = (0x18 << 6) | OPC_BSHFL,
};
/* DBSHFL opcodes */
#define MASK_DBSHFL(op) MASK_SPECIAL3(op) | (op & (0x1F << 6))
enum {
OPC_DSBH = (0x02 << 6) | OPC_DBSHFL,
OPC_DSHD = (0x05 << 6) | OPC_DBSHFL,
};
/* Coprocessor 0 (rs field) */
#define MASK_CP0(op) MASK_OP_MAJOR(op) | (op & (0x1F << 21))
enum {
OPC_MFC0 = (0x00 << 21) | OPC_CP0,
OPC_DMFC0 = (0x01 << 21) | OPC_CP0,
OPC_MTC0 = (0x04 << 21) | OPC_CP0,
OPC_DMTC0 = (0x05 << 21) | OPC_CP0,
OPC_RDPGPR = (0x0A << 21) | OPC_CP0,
OPC_MFMC0 = (0x0B << 21) | OPC_CP0,
OPC_WRPGPR = (0x0E << 21) | OPC_CP0,
OPC_C0 = (0x10 << 21) | OPC_CP0,
OPC_C0_FIRST = (0x10 << 21) | OPC_CP0,
OPC_C0_LAST = (0x1F << 21) | OPC_CP0,
};
/* MFMC0 opcodes */
#define MASK_MFMC0(op) MASK_CP0(op) | (op & ((0x0C << 11) | (1 << 5)))
enum {
OPC_DI = (0 << 5) | (0x0C << 11) | OPC_MFMC0,
OPC_EI = (1 << 5) | (0x0C << 11) | OPC_MFMC0,
};
/* Coprocessor 0 (with rs == C0) */
#define MASK_C0(op) MASK_CP0(op) | (op & 0x3F)
enum {
OPC_TLBR = 0x01 | OPC_C0,
OPC_TLBWI = 0x02 | OPC_C0,
OPC_TLBWR = 0x06 | OPC_C0,
OPC_TLBP = 0x08 | OPC_C0,
OPC_RFE = 0x10 | OPC_C0,
OPC_ERET = 0x18 | OPC_C0,
OPC_DERET = 0x1F | OPC_C0,
OPC_WAIT = 0x20 | OPC_C0,
};
/* Coprocessor 1 (rs field) */
#define MASK_CP1(op) MASK_OP_MAJOR(op) | (op & (0x1F << 21))
enum {
OPC_MFC1 = (0x00 << 21) | OPC_CP1,
OPC_DMFC1 = (0x01 << 21) | OPC_CP1,
OPC_CFC1 = (0x02 << 21) | OPC_CP1,
OPC_MFHCI = (0x03 << 21) | OPC_CP1,
OPC_MTC1 = (0x04 << 21) | OPC_CP1,
OPC_DMTC1 = (0x05 << 21) | OPC_CP1,
OPC_CTC1 = (0x06 << 21) | OPC_CP1,
OPC_MTHCI = (0x07 << 21) | OPC_CP1,
OPC_BC1 = (0x08 << 21) | OPC_CP1, /* bc */
OPC_S_FMT = (0x10 << 21) | OPC_CP1, /* 16: fmt=single fp */
OPC_D_FMT = (0x11 << 21) | OPC_CP1, /* 17: fmt=double fp */
OPC_E_FMT = (0x12 << 21) | OPC_CP1, /* 18: fmt=extended fp */
OPC_Q_FMT = (0x13 << 21) | OPC_CP1, /* 19: fmt=quad fp */
OPC_W_FMT = (0x14 << 21) | OPC_CP1, /* 20: fmt=32bit fixed */
OPC_L_FMT = (0x15 << 21) | OPC_CP1, /* 21: fmt=64bit fixed */
};
enum {
OPC_BC1F = (0x00 << 16) | OPC_BC1,
OPC_BC1T = (0x01 << 16) | OPC_BC1,
OPC_BC1FL = (0x02 << 16) | OPC_BC1,
OPC_BC1TL = (0x03 << 16) | OPC_BC1,
};
#define MASK_CP1_BCOND(op) MASK_CP1(op) | (op & (0x3 << 16))
#define MASK_CP1_FUNC(op) MASK_CP1(op) | (op & 0x3F)
#define MASK_CP2(op) MASK_OP_MAJOR(op) | (op & (0x1F << 21))
#define MASK_CP3(op) MASK_OP_MAJOR(op) | (op & (0x1F << 21))
const unsigned char *regnames[] =
{ "r0", "at", "v0", "v1", "a0", "a1", "a2", "a3",
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", };
/* Warning: no function for r0 register (hard wired to zero) */
#define GEN32(func, NAME) \
static GenOpFunc *NAME ## _table [32] = { \
NULL, NAME ## 1, NAME ## 2, NAME ## 3, \
NAME ## 4, NAME ## 5, NAME ## 6, NAME ## 7, \
NAME ## 8, NAME ## 9, NAME ## 10, NAME ## 11, \
NAME ## 12, NAME ## 13, NAME ## 14, NAME ## 15, \
NAME ## 16, NAME ## 17, NAME ## 18, NAME ## 19, \
NAME ## 20, NAME ## 21, NAME ## 22, NAME ## 23, \
NAME ## 24, NAME ## 25, NAME ## 26, NAME ## 27, \
NAME ## 28, NAME ## 29, NAME ## 30, NAME ## 31, \
}; \
static inline void func(int n) \
{ \
NAME ## _table[n](); \
}
/* General purpose registers moves */
GEN32(gen_op_load_gpr_T0, gen_op_load_gpr_T0_gpr);
GEN32(gen_op_load_gpr_T1, gen_op_load_gpr_T1_gpr);
GEN32(gen_op_load_gpr_T2, gen_op_load_gpr_T2_gpr);
GEN32(gen_op_store_T0_gpr, gen_op_store_T0_gpr_gpr);
GEN32(gen_op_store_T1_gpr, gen_op_store_T1_gpr_gpr);
#ifdef MIPS_USES_FPU
static const char *fregnames[] =
{ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", };
# define SFGEN32(func, NAME) \
static GenOpFunc *NAME ## _table [32] = { \
NAME ## 0, NAME ## 1, NAME ## 2, NAME ## 3, \
NAME ## 4, NAME ## 5, NAME ## 6, NAME ## 7, \
NAME ## 8, NAME ## 9, NAME ## 10, NAME ## 11, \
NAME ## 12, NAME ## 13, NAME ## 14, NAME ## 15, \
NAME ## 16, NAME ## 17, NAME ## 18, NAME ## 19, \
NAME ## 20, NAME ## 21, NAME ## 22, NAME ## 23, \
NAME ## 24, NAME ## 25, NAME ## 26, NAME ## 27, \
NAME ## 28, NAME ## 29, NAME ## 30, NAME ## 31, \
}; \
static inline void func(int n) \
{ \
NAME ## _table[n](); \
}
# define DFGEN32(func, NAME) \
static GenOpFunc *NAME ## _table [32] = { \
NAME ## 0, 0, NAME ## 2, 0, \
NAME ## 4, 0, NAME ## 6, 0, \
NAME ## 8, 0, NAME ## 10, 0, \
NAME ## 12, 0, NAME ## 14, 0, \
NAME ## 16, 0, NAME ## 18, 0, \
NAME ## 20, 0, NAME ## 22, 0, \
NAME ## 24, 0, NAME ## 26, 0, \
NAME ## 28, 0, NAME ## 30, 0, \
}; \
static inline void func(int n) \
{ \
NAME ## _table[n](); \
}
SFGEN32(gen_op_load_fpr_WT0, gen_op_load_fpr_WT0_fpr);
SFGEN32(gen_op_store_fpr_WT0, gen_op_store_fpr_WT0_fpr);
SFGEN32(gen_op_load_fpr_WT1, gen_op_load_fpr_WT1_fpr);
SFGEN32(gen_op_store_fpr_WT1, gen_op_store_fpr_WT1_fpr);
SFGEN32(gen_op_load_fpr_WT2, gen_op_load_fpr_WT2_fpr);
SFGEN32(gen_op_store_fpr_WT2, gen_op_store_fpr_WT2_fpr);
DFGEN32(gen_op_load_fpr_DT0, gen_op_load_fpr_DT0_fpr);
DFGEN32(gen_op_store_fpr_DT0, gen_op_store_fpr_DT0_fpr);
DFGEN32(gen_op_load_fpr_DT1, gen_op_load_fpr_DT1_fpr);
DFGEN32(gen_op_store_fpr_DT1, gen_op_store_fpr_DT1_fpr);
DFGEN32(gen_op_load_fpr_DT2, gen_op_load_fpr_DT2_fpr);
DFGEN32(gen_op_store_fpr_DT2, gen_op_store_fpr_DT2_fpr);
#define FOP_CONDS(fmt) \
static GenOpFunc * cond_ ## fmt ## _table[16] = { \
gen_op_cmp_ ## fmt ## _f, \
gen_op_cmp_ ## fmt ## _un, \
gen_op_cmp_ ## fmt ## _eq, \
gen_op_cmp_ ## fmt ## _ueq, \
gen_op_cmp_ ## fmt ## _olt, \
gen_op_cmp_ ## fmt ## _ult, \
gen_op_cmp_ ## fmt ## _ole, \
gen_op_cmp_ ## fmt ## _ule, \
gen_op_cmp_ ## fmt ## _sf, \
gen_op_cmp_ ## fmt ## _ngle, \
gen_op_cmp_ ## fmt ## _seq, \
gen_op_cmp_ ## fmt ## _ngl, \
gen_op_cmp_ ## fmt ## _lt, \
gen_op_cmp_ ## fmt ## _nge, \
gen_op_cmp_ ## fmt ## _le, \
gen_op_cmp_ ## fmt ## _ngt, \
}; \
static inline void gen_cmp_ ## fmt(int n) \
{ \
cond_ ## fmt ## _table[n](); \
}
FOP_CONDS(d)
FOP_CONDS(s)
#endif /* MIPS_USES_FPU */
typedef struct DisasContext {
struct TranslationBlock *tb;
target_ulong pc, saved_pc;
uint32_t opcode;
/* Routine used to access memory */
int mem_idx;
uint32_t hflags, saved_hflags;
uint32_t CP0_Status;
int bstate;
target_ulong btarget;
} DisasContext;
enum {
BS_NONE = 0, /* We go out of the TB without reaching a branch or an
* exception condition
*/
BS_STOP = 1, /* We want to stop translation for any reason */
BS_BRANCH = 2, /* We reached a branch condition */
BS_EXCP = 3, /* We reached an exception condition */
};
#if defined MIPS_DEBUG_DISAS
#define MIPS_DEBUG(fmt, args...) \
do { \
if (loglevel & CPU_LOG_TB_IN_ASM) { \
fprintf(logfile, TLSZ ": %08x " fmt "\n", \
ctx->pc, ctx->opcode , ##args); \
} \
} while (0)
#else
#define MIPS_DEBUG(fmt, args...) do { } while(0)
#endif
#define MIPS_INVAL(op) \
do { \
MIPS_DEBUG("Invalid %s %03x %03x %03x", op, ctx->opcode >> 26, \
ctx->opcode & 0x3F, ((ctx->opcode >> 16) & 0x1F)); \
} while (0)
#define GEN_LOAD_REG_TN(Tn, Rn) \
do { \
if (Rn == 0) { \
glue(gen_op_reset_, Tn)(); \
} else { \
glue(gen_op_load_gpr_, Tn)(Rn); \
} \
} while (0)
#define GEN_LOAD_IMM_TN(Tn, Imm) \
do { \
if (Imm == 0) { \
glue(gen_op_reset_, Tn)(); \
} else { \
glue(gen_op_set_, Tn)(Imm); \
} \
} while (0)
#define GEN_STORE_TN_REG(Rn, Tn) \
do { \
if (Rn != 0) { \
glue(glue(gen_op_store_, Tn),_gpr)(Rn); \
} \
} while (0)
#define GEN_LOAD_FREG_FTN(FTn, Fn) \
do { \
glue(gen_op_load_fpr_, FTn)(Fn); \
} while (0)
#define GEN_STORE_FTN_FREG(Fn, FTn) \
do { \
glue(gen_op_store_fpr_, FTn)(Fn); \
} while (0)
static inline void save_cpu_state (DisasContext *ctx, int do_save_pc)
{
#if defined MIPS_DEBUG_DISAS
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "hflags %08x saved %08x\n",
ctx->hflags, ctx->saved_hflags);
}
#endif
if (do_save_pc && ctx->pc != ctx->saved_pc) {
gen_op_save_pc(ctx->pc);
ctx->saved_pc = ctx->pc;
}
if (ctx->hflags != ctx->saved_hflags) {
gen_op_save_state(ctx->hflags);
ctx->saved_hflags = ctx->hflags;
if (ctx->hflags & MIPS_HFLAG_BR) {
gen_op_save_breg_target();
} else if (ctx->hflags & MIPS_HFLAG_B) {
gen_op_save_btarget(ctx->btarget);
} else if (ctx->hflags & MIPS_HFLAG_BMASK) {
gen_op_save_bcond();
gen_op_save_btarget(ctx->btarget);
}
}
}
static inline void generate_exception_err (DisasContext *ctx, int excp, int err)
{
#if defined MIPS_DEBUG_DISAS
if (loglevel & CPU_LOG_TB_IN_ASM)
fprintf(logfile, "%s: raise exception %d\n", __func__, excp);
#endif
save_cpu_state(ctx, 1);
if (err == 0)
gen_op_raise_exception(excp);
else
gen_op_raise_exception_err(excp, err);
ctx->bstate = BS_EXCP;
}
static inline void generate_exception (DisasContext *ctx, int excp)
{
generate_exception_err (ctx, excp, 0);
}
#if defined(CONFIG_USER_ONLY)
#define op_ldst(name) gen_op_##name##_raw()
#define OP_LD_TABLE(width)
#define OP_ST_TABLE(width)
#else
#define op_ldst(name) (*gen_op_##name[ctx->mem_idx])()
#define OP_LD_TABLE(width) \
static GenOpFunc *gen_op_l##width[] = { \
&gen_op_l##width##_user, \
&gen_op_l##width##_kernel, \
}
#define OP_ST_TABLE(width) \
static GenOpFunc *gen_op_s##width[] = { \
&gen_op_s##width##_user, \
&gen_op_s##width##_kernel, \
}
#endif
#ifdef MIPS_HAS_MIPS64
OP_LD_TABLE(d);
OP_LD_TABLE(dl);
OP_LD_TABLE(dr);
OP_ST_TABLE(d);
OP_ST_TABLE(dl);
OP_ST_TABLE(dr);
OP_LD_TABLE(ld);
OP_ST_TABLE(cd);
#endif
OP_LD_TABLE(w);
OP_LD_TABLE(wu);
OP_LD_TABLE(wl);
OP_LD_TABLE(wr);
OP_ST_TABLE(w);
OP_ST_TABLE(wl);
OP_ST_TABLE(wr);
OP_LD_TABLE(h);
OP_LD_TABLE(hu);
OP_ST_TABLE(h);
OP_LD_TABLE(b);
OP_LD_TABLE(bu);
OP_ST_TABLE(b);
OP_LD_TABLE(l);
OP_ST_TABLE(c);
#ifdef MIPS_USES_FPU
OP_LD_TABLE(wc1);
OP_ST_TABLE(wc1);
OP_LD_TABLE(dc1);
OP_ST_TABLE(dc1);
#endif
/* Load and store */
static void gen_ldst (DisasContext *ctx, uint32_t opc, int rt,
int base, int16_t offset)
{
const char *opn = "unk";
if (base == 0) {
GEN_LOAD_IMM_TN(T0, offset);
} else if (offset == 0) {
gen_op_load_gpr_T0(base);
} else {
gen_op_load_gpr_T0(base);
gen_op_set_T1(offset);
gen_op_add();
}
/* Don't do NOP if destination is zero: we must perform the actual
* memory access
*/
switch (opc) {
#ifdef MIPS_HAS_MIPS64
case OPC_LD:
op_ldst(ld);
GEN_STORE_TN_REG(rt, T0);
opn = "ld";
break;
case OPC_LLD:
op_ldst(lld);
GEN_STORE_TN_REG(rt, T0);
opn = "lld";
break;
case OPC_SD:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(sd);
opn = "sd";
break;
case OPC_SCD:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(scd);
opn = "scd";
break;
case OPC_LDL:
op_ldst(ldl);
GEN_STORE_TN_REG(rt, T0);
opn = "ldl";
break;
case OPC_SDL:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(sdl);
opn = "sdl";
break;
case OPC_LDR:
op_ldst(ldr);
GEN_STORE_TN_REG(rt, T0);
opn = "ldr";
break;
case OPC_SDR:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(sdr);
opn = "sdr";
break;
#endif
case OPC_LW:
op_ldst(lw);
GEN_STORE_TN_REG(rt, T0);
opn = "lw";
break;
case OPC_LWU:
op_ldst(lwu);
GEN_STORE_TN_REG(rt, T0);
opn = "lwu";
break;
case OPC_SW:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(sw);
opn = "sw";
break;
case OPC_LH:
op_ldst(lh);
GEN_STORE_TN_REG(rt, T0);
opn = "lh";
break;
case OPC_SH:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(sh);
opn = "sh";
break;
case OPC_LHU:
op_ldst(lhu);
GEN_STORE_TN_REG(rt, T0);
opn = "lhu";
break;
case OPC_LB:
op_ldst(lb);
GEN_STORE_TN_REG(rt, T0);
opn = "lb";
break;
case OPC_SB:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(sb);
opn = "sb";
break;
case OPC_LBU:
op_ldst(lbu);
GEN_STORE_TN_REG(rt, T0);
opn = "lbu";
break;
case OPC_LWL:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(lwl);
GEN_STORE_TN_REG(rt, T0);
opn = "lwl";
break;
case OPC_SWL:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(swl);
opn = "swr";
break;
case OPC_LWR:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(lwr);
GEN_STORE_TN_REG(rt, T0);
opn = "lwr";
break;
case OPC_SWR:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(swr);
opn = "swr";
break;
case OPC_LL:
op_ldst(ll);
GEN_STORE_TN_REG(rt, T0);
opn = "ll";
break;
case OPC_SC:
GEN_LOAD_REG_TN(T1, rt);
op_ldst(sc);
GEN_STORE_TN_REG(rt, T0);
opn = "sc";
break;
default:
MIPS_INVAL("load/store");
generate_exception(ctx, EXCP_RI);
return;
}
MIPS_DEBUG("%s %s, %d(%s)", opn, regnames[rt], offset, regnames[base]);
}
#ifdef MIPS_USES_FPU
/* Load and store */
static void gen_flt_ldst (DisasContext *ctx, uint32_t opc, int ft,
int base, int16_t offset)
{
const char *opn = "unk";
if (base == 0) {
GEN_LOAD_IMM_TN(T0, offset);
} else if (offset == 0) {
gen_op_load_gpr_T0(base);
} else {
gen_op_load_gpr_T0(base);
gen_op_set_T1(offset);
gen_op_add();
}
/* Don't do NOP if destination is zero: we must perform the actual
* memory access
*/
switch (opc) {
case OPC_LWC1:
op_ldst(lwc1);
GEN_STORE_FTN_FREG(ft, WT0);
opn = "lwc1";
break;
case OPC_SWC1:
GEN_LOAD_FREG_FTN(WT0, ft);
op_ldst(swc1);
opn = "swc1";
break;
case OPC_LDC1:
op_ldst(ldc1);
GEN_STORE_FTN_FREG(ft, DT0);
opn = "ldc1";
break;
case OPC_SDC1:
GEN_LOAD_FREG_FTN(DT0, ft);
op_ldst(sdc1);
opn = "sdc1";
break;
default:
MIPS_INVAL("float load/store");
generate_exception_err(ctx, EXCP_CpU, 1);
return;
}
MIPS_DEBUG("%s %s, %d(%s)", opn, fregnames[ft], offset, regnames[base]);
}
#endif /* MIPS_USES_FPU */
/* Arithmetic with immediate operand */
static void gen_arith_imm (DisasContext *ctx, uint32_t opc, int rt,
int rs, int16_t imm)
{
uint32_t uimm;
const char *opn = "unk";
if (rt == 0 && opc != OPC_ADDI && opc != OPC_DADDI) {
/* if no destination, treat it as a NOP
* For addi, we must generate the overflow exception when needed.
*/
MIPS_DEBUG("NOP");
return;
}
if (opc == OPC_ADDI || opc == OPC_ADDIU ||
opc == OPC_DADDI || opc == OPC_DADDIU ||
opc == OPC_SLTI || opc == OPC_SLTIU)
uimm = (int32_t)imm; /* Sign extend to 32 bits */
else
uimm = (uint16_t)imm;
if (opc != OPC_LUI) {
GEN_LOAD_REG_TN(T0, rs);
GEN_LOAD_IMM_TN(T1, uimm);
} else {
uimm = uimm << 16;
GEN_LOAD_IMM_TN(T0, uimm);
}
switch (opc) {
case OPC_ADDI:
save_cpu_state(ctx, 1);
gen_op_addo();
opn = "addi";
break;
case OPC_ADDIU:
gen_op_add();
opn = "addiu";
break;
#ifdef MIPS_HAS_MIPS64
case OPC_DADDI:
save_cpu_state(ctx, 1);
gen_op_daddo();
opn = "daddi";
break;
case OPC_DADDIU:
gen_op_dadd();
opn = "daddiu";
break;
#endif
case OPC_SLTI:
gen_op_lt();
opn = "slti";
break;
case OPC_SLTIU:
gen_op_ltu();
opn = "sltiu";
break;
case OPC_ANDI:
gen_op_and();
opn = "andi";
break;
case OPC_ORI:
gen_op_or();
opn = "ori";
break;
case OPC_XORI:
gen_op_xor();
opn = "xori";
break;
case OPC_LUI:
opn = "lui";
break;
case OPC_SLL:
gen_op_sll();
opn = "sll";
break;
case OPC_SRA:
gen_op_sra();
opn = "sra";
break;
case OPC_SRL:
if ((ctx->opcode >> 21) & 1) {
gen_op_rotr();
opn = "rotr";
} else {
gen_op_srl();
opn = "srl";
}
break;
#ifdef MIPS_HAS_MIPS64
case OPC_DSLL:
gen_op_dsll();
opn = "dsll";
break;
case OPC_DSRA:
gen_op_dsra();
opn = "dsra";
break;
case OPC_DSRL:
if ((ctx->opcode >> 21) & 1) {
gen_op_drotr();
opn = "drotr";
} else {
gen_op_dsrl();
opn = "dsrl";
}
break;
case OPC_DSLL32:
gen_op_dsll32();
opn = "dsll32";
break;
case OPC_DSRA32:
gen_op_dsra32();
opn = "dsra32";
break;
case OPC_DSRL32:
if ((ctx->opcode >> 21) & 1) {
gen_op_drotr32();
opn = "drotr32";
} else {
gen_op_dsrl32();
opn = "dsrl32";
}
break;
#endif
default:
MIPS_INVAL("imm arith");
generate_exception(ctx, EXCP_RI);
return;
}
GEN_STORE_TN_REG(rt, T0);
MIPS_DEBUG("%s %s, %s, %x", opn, regnames[rt], regnames[rs], uimm);
}
/* Arithmetic */
static void gen_arith (DisasContext *ctx, uint32_t opc,
int rd, int rs, int rt)
{
const char *opn = "unk";
if (rd == 0 && opc != OPC_ADD && opc != OPC_SUB
&& opc != OPC_DADD && opc != OPC_DSUB) {
/* if no destination, treat it as a NOP
* For add & sub, we must generate the overflow exception when needed.
*/
MIPS_DEBUG("NOP");
return;
}
GEN_LOAD_REG_TN(T0, rs);
GEN_LOAD_REG_TN(T1, rt);
switch (opc) {
case OPC_ADD:
save_cpu_state(ctx, 1);
gen_op_addo();
opn = "add";
break;
case OPC_ADDU:
gen_op_add();
opn = "addu";
break;
case OPC_SUB:
save_cpu_state(ctx, 1);
gen_op_subo();
opn = "sub";
break;
case OPC_SUBU:
gen_op_sub();
opn = "subu";
break;
#ifdef MIPS_HAS_MIPS64
case OPC_DADD:
save_cpu_state(ctx, 1);
gen_op_daddo();
opn = "dadd";
break;
case OPC_DADDU:
gen_op_dadd();
opn = "daddu";
break;
case OPC_DSUB:
save_cpu_state(ctx, 1);
gen_op_dsubo();
opn = "dsub";
break;
case OPC_DSUBU:
gen_op_dsub();
opn = "dsubu";
break;
#endif
case OPC_SLT:
gen_op_lt();
opn = "slt";
break;
case OPC_SLTU:
gen_op_ltu();
opn = "sltu";
break;
case OPC_AND:
gen_op_and();
opn = "and";
break;
case OPC_NOR:
gen_op_nor();
opn = "nor";
break;
case OPC_OR:
gen_op_or();
opn = "or";
break;
case OPC_XOR:
gen_op_xor();
opn = "xor";
break;
case OPC_MUL:
gen_op_mul();
opn = "mul";
break;
case OPC_MOVN:
gen_op_movn(rd);
opn = "movn";
goto print;
case OPC_MOVZ:
gen_op_movz(rd);
opn = "movz";
goto print;
case OPC_SLLV:
gen_op_sllv();
opn = "sllv";
break;
case OPC_SRAV:
gen_op_srav();
opn = "srav";
break;
case OPC_SRLV:
if ((ctx->opcode >> 6) & 1) {
gen_op_rotrv();
opn = "rotrv";
} else {
gen_op_srlv();
opn = "srlv";
}
break;
#ifdef MIPS_HAS_MIPS64
case OPC_DSLLV:
gen_op_dsllv();
opn = "dsllv";
break;
case OPC_DSRAV:
gen_op_dsrav();
opn = "dsrav";
break;
case OPC_DSRLV:
if ((ctx->opcode >> 6) & 1) {
gen_op_drotrv();
opn = "drotrv";
} else {
gen_op_dsrlv();
opn = "dsrlv";
}
break;
#endif
default:
MIPS_INVAL("arith");
generate_exception(ctx, EXCP_RI);
return;
}
GEN_STORE_TN_REG(rd, T0);
print:
MIPS_DEBUG("%s %s, %s, %s", opn, regnames[rd], regnames[rs], regnames[rt]);
}
/* Arithmetic on HI/LO registers */
static void gen_HILO (DisasContext *ctx, uint32_t opc, int reg)
{
const char *opn = "unk";
if (reg == 0 && (opc == OPC_MFHI || opc == OPC_MFLO)) {
/* Treat as a NOP */
MIPS_DEBUG("NOP");
return;
}
switch (opc) {
case OPC_MFHI:
gen_op_load_HI();
GEN_STORE_TN_REG(reg, T0);
opn = "mfhi";
break;
case OPC_MFLO:
gen_op_load_LO();
GEN_STORE_TN_REG(reg, T0);
opn = "mflo";
break;
case OPC_MTHI:
GEN_LOAD_REG_TN(T0, reg);
gen_op_store_HI();
opn = "mthi";
break;
case OPC_MTLO:
GEN_LOAD_REG_TN(T0, reg);
gen_op_store_LO();
opn = "mtlo";
break;
default:
MIPS_INVAL("HILO");
generate_exception(ctx, EXCP_RI);
return;
}
MIPS_DEBUG("%s %s", opn, regnames[reg]);
}
static void gen_muldiv (DisasContext *ctx, uint32_t opc,
int rs, int rt)
{
const char *opn = "unk";
GEN_LOAD_REG_TN(T0, rs);
GEN_LOAD_REG_TN(T1, rt);
switch (opc) {
case OPC_DIV:
gen_op_div();
opn = "div";
break;
case OPC_DIVU:
gen_op_divu();
opn = "divu";
break;
case OPC_MULT:
gen_op_mult();
opn = "mult";
break;
case OPC_MULTU:
gen_op_multu();
opn = "multu";
break;
#ifdef MIPS_HAS_MIPS64
case OPC_DDIV:
gen_op_ddiv();
opn = "ddiv";
break;
case OPC_DDIVU:
gen_op_ddivu();
opn = "ddivu";
break;
case OPC_DMULT:
gen_op_dmult();
opn = "dmult";
break;
case OPC_DMULTU:
gen_op_dmultu();
opn = "dmultu";
break;
#endif
case OPC_MADD:
gen_op_madd();
opn = "madd";
break;
case OPC_MADDU:
gen_op_maddu();
opn = "maddu";
break;
case OPC_MSUB:
gen_op_msub();
opn = "msub";
break;
case OPC_MSUBU:
gen_op_msubu();
opn = "msubu";
break;
default:
MIPS_INVAL("mul/div");
generate_exception(ctx, EXCP_RI);
return;
}
MIPS_DEBUG("%s %s %s", opn, regnames[rs], regnames[rt]);
}
static void gen_cl (DisasContext *ctx, uint32_t opc,
int rd, int rs)
{
const char *opn = "unk";
if (rd == 0) {
/* Treat as a NOP */
MIPS_DEBUG("NOP");
return;
}
GEN_LOAD_REG_TN(T0, rs);
switch (opc) {
case OPC_CLO:
gen_op_clo();
opn = "clo";
break;
case OPC_CLZ:
gen_op_clz();
opn = "clz";
break;
#ifdef MIPS_HAS_MIPS64
case OPC_DCLO:
gen_op_dclo();
opn = "dclo";
break;
case OPC_DCLZ:
gen_op_dclz();
opn = "dclz";
break;
#endif
default:
MIPS_INVAL("CLx");
generate_exception(ctx, EXCP_RI);
return;
}
gen_op_store_T0_gpr(rd);
MIPS_DEBUG("%s %s, %s", opn, regnames[rd], regnames[rs]);
}
/* Traps */
static void gen_trap (DisasContext *ctx, uint32_t opc,
int rs, int rt, int16_t imm)
{
int cond;
cond = 0;
/* Load needed operands */
switch (opc) {
case OPC_TEQ:
case OPC_TGE:
case OPC_TGEU:
case OPC_TLT:
case OPC_TLTU:
case OPC_TNE:
/* Compare two registers */
if (rs != rt) {
GEN_LOAD_REG_TN(T0, rs);
GEN_LOAD_REG_TN(T1, rt);
cond = 1;
}
break;
case OPC_TEQI:
case OPC_TGEI:
case OPC_TGEIU:
case OPC_TLTI:
case OPC_TLTIU:
case OPC_TNEI:
/* Compare register to immediate */
if (rs != 0 || imm != 0) {
GEN_LOAD_REG_TN(T0, rs);
GEN_LOAD_IMM_TN(T1, (int32_t)imm);
cond = 1;
}
break;
}
if (cond == 0) {
switch (opc) {
case OPC_TEQ: /* rs == rs */
case OPC_TEQI: /* r0 == 0 */
case OPC_TGE: /* rs >= rs */
case OPC_TGEI: /* r0 >= 0 */
case OPC_TGEU: /* rs >= rs unsigned */
case OPC_TGEIU: /* r0 >= 0 unsigned */
/* Always trap */
gen_op_set_T0(1);
break;
case OPC_TLT: /* rs < rs */
case OPC_TLTI: /* r0 < 0 */
case OPC_TLTU: /* rs < rs unsigned */
case OPC_TLTIU: /* r0 < 0 unsigned */
case OPC_TNE: /* rs != rs */
case OPC_TNEI: /* r0 != 0 */
/* Never trap: treat as NOP */
return;
default:
MIPS_INVAL("TRAP");
generate_exception(ctx, EXCP_RI);
return;
}
} else {
switch (opc) {
case OPC_TEQ:
case OPC_TEQI:
gen_op_eq();
break;
case OPC_TGE:
case OPC_TGEI:
gen_op_ge();
break;
case OPC_TGEU:
case OPC_TGEIU:
gen_op_geu();
break;
case OPC_TLT:
case OPC_TLTI:
gen_op_lt();
break;
case OPC_TLTU:
case OPC_TLTIU:
gen_op_ltu();
break;
case OPC_TNE:
case OPC_TNEI:
gen_op_ne();
break;
default:
MIPS_INVAL("TRAP");
generate_exception(ctx, EXCP_RI);
return;
}
}
save_cpu_state(ctx, 1);
gen_op_trap();
ctx->bstate = BS_STOP;
}
static inline void gen_goto_tb(DisasContext *ctx, int n, target_ulong dest)
{
TranslationBlock *tb;
tb = ctx->tb;
if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
if (n == 0)
gen_op_goto_tb0(TBPARAM(tb));
else
gen_op_goto_tb1(TBPARAM(tb));
gen_op_save_pc(dest);
gen_op_set_T0((long)tb + n);
gen_op_exit_tb();
} else {
gen_op_save_pc(dest);
gen_op_set_T0(0);
gen_op_exit_tb();
}
}
/* Branches (before delay slot) */
static void gen_compute_branch (DisasContext *ctx, uint32_t opc,
int rs, int rt, int32_t offset)
{
target_ulong btarget;
int blink, bcond;
btarget = -1;
blink = 0;
bcond = 0;
/* Load needed operands */
switch (opc) {
case OPC_BEQ:
case OPC_BEQL:
case OPC_BNE:
case OPC_BNEL:
/* Compare two registers */
if (rs != rt) {
GEN_LOAD_REG_TN(T0, rs);
GEN_LOAD_REG_TN(T1, rt);
bcond = 1;
}
btarget = ctx->pc + 4 + offset;
break;
case OPC_BGEZ:
case OPC_BGEZAL:
case OPC_BGEZALL:
case OPC_BGEZL:
case OPC_BGTZ:
case OPC_BGTZL:
case OPC_BLEZ:
case OPC_BLEZL:
case OPC_BLTZ:
case OPC_BLTZAL:
case OPC_BLTZALL:
case OPC_BLTZL:
/* Compare to zero */
if (rs != 0) {
gen_op_load_gpr_T0(rs);
bcond = 1;
}
btarget = ctx->pc + 4 + offset;
break;
case OPC_J:
case OPC_JAL:
/* Jump to immediate */
btarget = ((ctx->pc + 4) & (int32_t)0xF0000000) | offset;
break;
case OPC_JR:
case OPC_JALR:
/* Jump to register */
if (offset != 0 && offset != 16) {
/* Hint = 0 is JR/JALR, hint 16 is JR.HB/JALR.HB, the
others are reserved. */
generate_exception(ctx, EXCP_RI);
return;
}
GEN_LOAD_REG_TN(T2, rs);
break;
default:
MIPS_INVAL("branch/jump");
generate_exception(ctx, EXCP_RI);
return;
}
if (bcond == 0) {
/* No condition to be computed */
switch (opc) {
case OPC_BEQ: /* rx == rx */
case OPC_BEQL: /* rx == rx likely */
case OPC_BGEZ: /* 0 >= 0 */
case OPC_BGEZL: /* 0 >= 0 likely */
case OPC_BLEZ: /* 0 <= 0 */
case OPC_BLEZL: /* 0 <= 0 likely */
/* Always take */
ctx->hflags |= MIPS_HFLAG_B;
MIPS_DEBUG("balways");
break;
case OPC_BGEZAL: /* 0 >= 0 */
case OPC_BGEZALL: /* 0 >= 0 likely */
/* Always take and link */
blink = 31;
ctx->hflags |= MIPS_HFLAG_B;
MIPS_DEBUG("balways and link");
break;
case OPC_BNE: /* rx != rx */
case OPC_BGTZ: /* 0 > 0 */
case OPC_BLTZ: /* 0 < 0 */
/* Treated as NOP */
MIPS_DEBUG("bnever (NOP)");
return;
case OPC_BLTZAL: /* 0 < 0 */
gen_op_set_T0(ctx->pc + 8);
gen_op_store_T0_gpr(31);
return;
case OPC_BLTZALL: /* 0 < 0 likely */
gen_op_set_T0(ctx->pc + 8);
gen_op_store_T0_gpr(31);
gen_goto_tb(ctx, 0, ctx->pc + 4);
return;
case OPC_BNEL: /* rx != rx likely */
case OPC_BGTZL: /* 0 > 0 likely */
case OPC_BLTZL: /* 0 < 0 likely */
/* Skip the instruction in the delay slot */
MIPS_DEBUG("bnever and skip");
gen_goto_tb(ctx, 0, ctx->pc + 4);
return;
case OPC_J:
ctx->hflags |= MIPS_HFLAG_B;
MIPS_DEBUG("j %08x", btarget);
break;
case OPC_JAL:
blink = 31;
ctx->hflags |= MIPS_HFLAG_B;
MIPS_DEBUG("jal %08x", btarget);
break;
case OPC_JR:
ctx->hflags |= MIPS_HFLAG_BR;
MIPS_DEBUG("jr %s", regnames[rs]);
break;
case OPC_JALR:
blink = rt;
ctx->hflags |= MIPS_HFLAG_BR;
MIPS_DEBUG("jalr %s, %s", regnames[rt], regnames[rs]);
break;
default:
MIPS_INVAL("branch/jump");
generate_exception(ctx, EXCP_RI);
return;
}
} else {
switch (opc) {
case OPC_BEQ:
gen_op_eq();
MIPS_DEBUG("beq %s, %s, %08x",
regnames[rs], regnames[rt], btarget);
goto not_likely;
case OPC_BEQL:
gen_op_eq();
MIPS_DEBUG("beql %s, %s, %08x",
regnames[rs], regnames[rt], btarget);
goto likely;
case OPC_BNE:
gen_op_ne();
MIPS_DEBUG("bne %s, %s, %08x",
regnames[rs], regnames[rt], btarget);
goto not_likely;
case OPC_BNEL:
gen_op_ne();
MIPS_DEBUG("bnel %s, %s, %08x",
regnames[rs], regnames[rt], btarget);
goto likely;
case OPC_BGEZ:
gen_op_gez();
MIPS_DEBUG("bgez %s, %08x", regnames[rs], btarget);
goto not_likely;
case OPC_BGEZL:
gen_op_gez();
MIPS_DEBUG("bgezl %s, %08x", regnames[rs], btarget);
goto likely;
case OPC_BGEZAL:
gen_op_gez();
MIPS_DEBUG("bgezal %s, %08x", regnames[rs], btarget);
blink = 31;
goto not_likely;
case OPC_BGEZALL:
gen_op_gez();
blink = 31;
MIPS_DEBUG("bgezall %s, %08x", regnames[rs], btarget);
goto likely;
case OPC_BGTZ:
gen_op_gtz();
MIPS_DEBUG("bgtz %s, %08x", regnames[rs], btarget);
goto not_likely;
case OPC_BGTZL:
gen_op_gtz();
MIPS_DEBUG("bgtzl %s, %08x", regnames[rs], btarget);
goto likely;
case OPC_BLEZ:
gen_op_lez();
MIPS_DEBUG("blez %s, %08x", regnames[rs], btarget);
goto not_likely;
case OPC_BLEZL:
gen_op_lez();
MIPS_DEBUG("blezl %s, %08x", regnames[rs], btarget);
goto likely;
case OPC_BLTZ:
gen_op_ltz();
MIPS_DEBUG("bltz %s, %08x", regnames[rs], btarget);
goto not_likely;
case OPC_BLTZL:
gen_op_ltz();
MIPS_DEBUG("bltzl %s, %08x", regnames[rs], btarget);
goto likely;
case OPC_BLTZAL:
gen_op_ltz();
blink = 31;
MIPS_DEBUG("bltzal %s, %08x", regnames[rs], btarget);
not_likely:
ctx->hflags |= MIPS_HFLAG_BC;
break;
case OPC_BLTZALL:
gen_op_ltz();
blink = 31;
MIPS_DEBUG("bltzall %s, %08x", regnames[rs], btarget);
likely:
ctx->hflags |= MIPS_HFLAG_BL;
break;
}
gen_op_set_bcond();
}
MIPS_DEBUG("enter ds: link %d cond %02x target %08x",
blink, ctx->hflags, btarget);
ctx->btarget = btarget;
if (blink > 0) {
gen_op_set_T0(ctx->pc + 8);
gen_op_store_T0_gpr(blink);
}
return;
}
/* special3 bitfield operations */
static void gen_bitops (DisasContext *ctx, uint32_t opc, int rt,
int rs, int lsb, int msb)
{
GEN_LOAD_REG_TN(T1, rs);
switch (opc) {
case OPC_EXT:
if (lsb + msb > 31)
goto fail;
gen_op_ext(lsb, msb + 1);
break;
case OPC_DEXTM:
if (lsb + msb > 63)
goto fail;
gen_op_ext(lsb, msb + 1 + 32);
break;
case OPC_DEXTU:
if (lsb + msb > 63)
goto fail;
gen_op_ext(lsb + 32, msb + 1);
break;
case OPC_DEXT:
gen_op_ext(lsb, msb + 1);
break;
case OPC_INS:
if (lsb > msb)
goto fail;
GEN_LOAD_REG_TN(T2, rt);
gen_op_ins(lsb, msb - lsb + 1);
break;
case OPC_DINSM:
if (lsb > msb)
goto fail;
GEN_LOAD_REG_TN(T2, rt);
gen_op_ins(lsb, msb - lsb + 1 + 32);
break;
case OPC_DINSU:
if (lsb > msb)
goto fail;
GEN_LOAD_REG_TN(T2, rt);
gen_op_ins(lsb + 32, msb - lsb + 1);
break;
case OPC_DINS:
if (lsb > msb)
goto fail;
GEN_LOAD_REG_TN(T2, rt);
gen_op_ins(lsb, msb - lsb + 1);
break;
default:
fail:
MIPS_INVAL("bitops");
generate_exception(ctx, EXCP_RI);
return;
}
GEN_STORE_TN_REG(rt, T0);
}
/* CP0 (MMU and control) */
static void gen_mfc0 (DisasContext *ctx, int reg, int sel)
{
const char *rn = "invalid";
switch (reg) {
case 0:
switch (sel) {
case 0:
gen_op_mfc0_index();
rn = "Index";
break;
case 1:
// gen_op_mfc0_mvpcontrol(); /* MT ASE */
rn = "MVPControl";
// break;
case 2:
// gen_op_mfc0_mvpconf0(); /* MT ASE */
rn = "MVPConf0";
// break;
case 3:
// gen_op_mfc0_mvpconf1(); /* MT ASE */
rn = "MVPConf1";
// break;
default:
goto die;
}
break;
case 1:
switch (sel) {
case 0:
gen_op_mfc0_random();
rn = "Random";
break;
case 1:
// gen_op_mfc0_vpecontrol(); /* MT ASE */
rn = "VPEControl";
// break;
case 2:
// gen_op_mfc0_vpeconf0(); /* MT ASE */
rn = "VPEConf0";
// break;
case 3:
// gen_op_mfc0_vpeconf1(); /* MT ASE */
rn = "VPEConf1";
// break;
case 4:
// gen_op_mfc0_YQMask(); /* MT ASE */
rn = "YQMask";
// break;
case 5:
// gen_op_mfc0_vpeschedule(); /* MT ASE */
rn = "VPESchedule";
// break;
case 6:
// gen_op_mfc0_vpeschefback(); /* MT ASE */
rn = "VPEScheFBack";
// break;
case 7:
// gen_op_mfc0_vpeopt(); /* MT ASE */
rn = "VPEOpt";
// break;
default:
goto die;
}
break;
case 2:
switch (sel) {
case 0:
gen_op_mfc0_entrylo0();
rn = "EntryLo0";
break;
case 1:
// gen_op_mfc0_tcstatus(); /* MT ASE */
rn = "TCStatus";
// break;
case 2:
// gen_op_mfc0_tcbind(); /* MT ASE */
rn = "TCBind";
// break;
case 3:
// gen_op_mfc0_tcrestart(); /* MT ASE */
rn = "TCRestart";
// break;
case 4:
// gen_op_mfc0_tchalt(); /* MT ASE */
rn = "TCHalt";
// break;
case 5:
// gen_op_mfc0_tccontext(); /* MT ASE */
rn = "TCContext";
// break;
case 6:
// gen_op_mfc0_tcschedule(); /* MT ASE */
rn = "TCSchedule";
// break;
case 7:
// gen_op_mfc0_tcschefback(); /* MT ASE */
rn = "TCScheFBack";
// break;
default:
goto die;
}
break;
case 3:
switch (sel) {
case 0:
gen_op_mfc0_entrylo1();
rn = "EntryLo1";
break;
default:
goto die;
}
break;
case 4:
switch (sel) {
case 0:
gen_op_mfc0_context();
rn = "Context";
break;
case 1:
// gen_op_mfc0_contextconfig(); /* SmartMIPS ASE */
rn = "ContextConfig";
// break;
default:
goto die;
}
break;
case 5:
switch (sel) {
case 0:
gen_op_mfc0_pagemask();
rn = "PageMask";
break;
case 1:
gen_op_mfc0_pagegrain();
rn = "PageGrain";
break;
default:
goto die;
}
break;
case 6:
switch (sel) {
case 0:
gen_op_mfc0_wired();
rn = "Wired";
break;
case 1:
// gen_op_mfc0_srsconf0(); /* shadow registers */
rn = "SRSConf0";
// break;
case 2:
// gen_op_mfc0_srsconf1(); /* shadow registers */
rn = "SRSConf1";
// break;
case 3:
// gen_op_mfc0_srsconf2(); /* shadow registers */
rn = "SRSConf2";
// break;
case 4:
// gen_op_mfc0_srsconf3(); /* shadow registers */
rn = "SRSConf3";
// break;
case 5:
// gen_op_mfc0_srsconf4(); /* shadow registers */
rn = "SRSConf4";
// break;
default:
goto die;
}
break;
case 7:
switch (sel) {
case 0:
gen_op_mfc0_hwrena();
rn = "HWREna";
break;
default:
goto die;
}
break;
case 8:
switch (sel) {
case 0:
gen_op_mfc0_badvaddr();
rn = "BadVaddr";
break;
default:
goto die;
}
break;
case 9:
switch (sel) {
case 0:
gen_op_mfc0_count();
rn = "Count";
break;
/* 6,7 are implementation dependent */
default:
goto die;
}
break;
case 10:
switch (sel) {
case 0:
gen_op_mfc0_entryhi();
rn = "EntryHi";
break;
default:
goto die;
}
break;
case 11:
switch (sel) {
case 0:
gen_op_mfc0_compare();
rn = "Compare";
break;
/* 6,7 are implementation dependent */
default:
goto die;
}
break;
case 12:
switch (sel) {
case 0:
gen_op_mfc0_status();
rn = "Status";
break;
case 1:
gen_op_mfc0_intctl();
rn = "IntCtl";
break;
case 2:
gen_op_mfc0_srsctl();
rn = "SRSCtl";
break;
case 3:
// gen_op_mfc0_srsmap(); /* shadow registers */
rn = "SRSMap";
// break;
default:
goto die;
}
break;
case 13:
switch (sel) {
case 0:
gen_op_mfc0_cause();
rn = "Cause";
break;
default:
goto die;
}
break;
case 14:
switch (sel) {
case 0:
gen_op_mfc0_epc();
rn = "EPC";
break;
default:
goto die;
}
break;
case 15:
switch (sel) {
case 0:
gen_op_mfc0_prid();
rn = "PRid";
break;
case 1:
gen_op_mfc0_ebase();
rn = "EBase";
break;
default:
goto die;
}
break;
case 16:
switch (sel) {
case 0:
gen_op_mfc0_config0();
rn = "Config";
break;
case 1:
gen_op_mfc0_config1();
rn = "Config1";
break;
case 2:
gen_op_mfc0_config2();
rn = "Config2";
break;
case 3:
gen_op_mfc0_config3();
rn = "Config3";
break;
/* 6,7 are implementation dependent */
default:
goto die;
}
break;
case 17:
switch (sel) {
case 0:
gen_op_mfc0_lladdr();
rn = "LLAddr";
break;
default:
goto die;
}
break;
case 18:
switch (sel) {
case 0:
gen_op_mfc0_watchlo0();
rn = "WatchLo";
break;
case 1:
// gen_op_mfc0_watchlo1();
rn = "WatchLo1";
// break;
case 2:
// gen_op_mfc0_watchlo2();
rn = "WatchLo2";
// break;
case 3:
// gen_op_mfc0_watchlo3();
rn = "WatchLo3";
// break;
case 4:
// gen_op_mfc0_watchlo4();
rn = "WatchLo4";
// break;
case 5:
// gen_op_mfc0_watchlo5();
rn = "WatchLo5";
// break;
case 6:
// gen_op_mfc0_watchlo6();
rn = "WatchLo6";
// break;
case 7:
// gen_op_mfc0_watchlo7();
rn = "WatchLo7";
// break;
default:
goto die;
}
break;
case 19:
switch (sel) {
case 0:
gen_op_mfc0_watchhi0();
rn = "WatchHi";
break;
case 1:
// gen_op_mfc0_watchhi1();
rn = "WatchHi1";
// break;
case 2:
// gen_op_mfc0_watchhi2();
rn = "WatchHi2";
// break;
case 3:
// gen_op_mfc0_watchhi3();
rn = "WatchHi3";
// break;
case 4:
// gen_op_mfc0_watchhi4();
rn = "WatchHi4";
// break;
case 5:
// gen_op_mfc0_watchhi5();
rn = "WatchHi5";
// break;
case 6:
// gen_op_mfc0_watchhi6();
rn = "WatchHi6";
// break;
case 7:
// gen_op_mfc0_watchhi7();
rn = "WatchHi7";
// break;
default:
goto die;
}
break;
case 20:
switch (sel) {
case 0:
/* 64 bit MMU only */
gen_op_mfc0_xcontext();
rn = "XContext";
break;
default:
goto die;
}
break;
case 21:
/* Officially reserved, but sel 0 is used for R1x000 framemask */
switch (sel) {
case 0:
gen_op_mfc0_framemask();
rn = "Framemask";
break;
default:
goto die;
}
break;
case 22:
/* ignored */
rn = "'Diagnostic"; /* implementation dependent */
break;
case 23:
switch (sel) {
case 0:
gen_op_mfc0_debug(); /* EJTAG support */
rn = "Debug";
break;
case 1:
// gen_op_mfc0_tracecontrol(); /* PDtrace support */
rn = "TraceControl";
// break;
case 2:
// gen_op_mfc0_tracecontrol2(); /* PDtrace support */
rn = "TraceControl2";
// break;
case 3:
// gen_op_mfc0_usertracedata(); /* PDtrace support */
rn = "UserTraceData";
// break;
case 4:
// gen_op_mfc0_debug(); /* PDtrace support */
rn = "TraceBPC";
// break;
default:
goto die;
}
break;
case 24:
switch (sel) {
case 0:
gen_op_mfc0_depc(); /* EJTAG support */
rn = "DEPC";
break;
default:
goto die;
}
break;
case 25:
switch (sel) {
case 0:
gen_op_mfc0_performance0();
rn = "Performance0";
break;
case 1:
// gen_op_mfc0_performance1();
rn = "Performance1";
// break;
case 2:
// gen_op_mfc0_performance2();
rn = "Performance2";
// break;
case 3:
// gen_op_mfc0_performance3();
rn = "Performance3";
// break;
case 4:
// gen_op_mfc0_performance4();
rn = "Performance4";
// break;
case 5:
// gen_op_mfc0_performance5();
rn = "Performance5";
// break;
case 6:
// gen_op_mfc0_performance6();
rn = "Performance6";
// break;
case 7:
// gen_op_mfc0_performance7();
rn = "Performance7";
// break;
default:
goto die;
}
break;
case 26:
rn = "ECC";
break;
case 27:
switch (sel) {
/* ignored */
case 0 ... 3:
rn = "CacheErr";
break;
default:
goto die;
}
break;
case 28:
switch (sel) {
case 0:
case 2:
case 4:
case 6:
gen_op_mfc0_taglo();
rn = "TagLo";
break;
case 1:
case 3:
case 5:
case 7:
gen_op_mfc0_datalo();
rn = "DataLo";
break;
default:
goto die;
}
break;
case 29:
switch (sel) {
case 0:
case 2:
case 4:
case 6:
gen_op_mfc0_taghi();
rn = "TagHi";
break;
case 1:
case 3:
case 5:
case 7:
gen_op_mfc0_datahi();
rn = "DataHi";
break;
default:
goto die;
}
break;
case 30:
switch (sel) {
case 0:
gen_op_mfc0_errorepc();
rn = "ErrorEPC";
break;
default:
goto die;
}
break;
case 31:
switch (sel) {
case 0:
gen_op_mfc0_desave(); /* EJTAG support */
rn = "DESAVE";
break;
default:
goto die;
}
break;
default:
goto die;
}
#if defined MIPS_DEBUG_DISAS
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "mfc0 %s (reg %d sel %d)\n",
rn, reg, sel);
}
#endif
return;
die:
#if defined MIPS_DEBUG_DISAS
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "mfc0 %s (reg %d sel %d)\n",
rn, reg, sel);
}
#endif
generate_exception(ctx, EXCP_RI);
}
static void gen_mtc0 (DisasContext *ctx, int reg, int sel)
{
const char *rn = "invalid";
switch (reg) {
case 0:
switch (sel) {
case 0:
gen_op_mtc0_index();
rn = "Index";
break;
case 1:
// gen_op_mtc0_mvpcontrol(); /* MT ASE */
rn = "MVPControl";
// break;
case 2:
// gen_op_mtc0_mvpconf0(); /* MT ASE */
rn = "MVPConf0";
// break;
case 3:
// gen_op_mtc0_mvpconf1(); /* MT ASE */
rn = "MVPConf1";
// break;
default:
goto die;
}
break;
case 1:
switch (sel) {
case 0:
/* ignored */
rn = "Random";
break;
case 1:
// gen_op_mtc0_vpecontrol(); /* MT ASE */
rn = "VPEControl";
// break;
case 2:
// gen_op_mtc0_vpeconf0(); /* MT ASE */
rn = "VPEConf0";
// break;
case 3:
// gen_op_mtc0_vpeconf1(); /* MT ASE */
rn = "VPEConf1";
// break;
case 4:
// gen_op_mtc0_YQMask(); /* MT ASE */
rn = "YQMask";
// break;
case 5:
// gen_op_mtc0_vpeschedule(); /* MT ASE */
rn = "VPESchedule";
// break;
case 6:
// gen_op_mtc0_vpeschefback(); /* MT ASE */
rn = "VPEScheFBack";
// break;
case 7:
// gen_op_mtc0_vpeopt(); /* MT ASE */
rn = "VPEOpt";
// break;
default:
goto die;
}
break;
case 2:
switch (sel) {
case 0:
gen_op_mtc0_entrylo0();
rn = "EntryLo0";
break;
case 1:
// gen_op_mtc0_tcstatus(); /* MT ASE */
rn = "TCStatus";
// break;
case 2:
// gen_op_mtc0_tcbind(); /* MT ASE */
rn = "TCBind";
// break;
case 3:
// gen_op_mtc0_tcrestart(); /* MT ASE */
rn = "TCRestart";
// break;
case 4:
// gen_op_mtc0_tchalt(); /* MT ASE */
rn = "TCHalt";
// break;
case 5:
// gen_op_mtc0_tccontext(); /* MT ASE */
rn = "TCContext";
// break;
case 6:
// gen_op_mtc0_tcschedule(); /* MT ASE */
rn = "TCSchedule";
// break;
case 7:
// gen_op_mtc0_tcschefback(); /* MT ASE */
rn = "TCScheFBack";
// break;
default:
goto die;
}
break;
case 3:
switch (sel) {
case 0:
gen_op_mtc0_entrylo1();
rn = "EntryLo1";
break;
default:
goto die;
}
break;
case 4:
switch (sel) {
case 0:
gen_op_mtc0_context();
rn = "Context";
break;
case 1:
// gen_op_mtc0_contextconfig(); /* SmartMIPS ASE */
rn = "ContextConfig";
// break;
default:
goto die;
}
break;
case 5:
switch (sel) {
case 0:
gen_op_mtc0_pagemask();
rn = "PageMask";
break;
case 1:
gen_op_mtc0_pagegrain();
rn = "PageGrain";
break;
default:
goto die;
}
break;
case 6:
switch (sel) {
case 0:
gen_op_mtc0_wired();
rn = "Wired";
break;
case 1:
// gen_op_mtc0_srsconf0(); /* shadow registers */
rn = "SRSConf0";
// break;
case 2:
// gen_op_mtc0_srsconf1(); /* shadow registers */
rn = "SRSConf1";
// break;
case 3:
// gen_op_mtc0_srsconf2(); /* shadow registers */
rn = "SRSConf2";
// break;
case 4:
// gen_op_mtc0_srsconf3(); /* shadow registers */
rn = "SRSConf3";
// break;
case 5:
// gen_op_mtc0_srsconf4(); /* shadow registers */
rn = "SRSConf4";
// break;
default:
goto die;
}
break;
case 7:
switch (sel) {
case 0:
gen_op_mtc0_hwrena();
rn = "HWREna";
break;
default:
goto die;
}
break;
case 8:
/* ignored */
rn = "BadVaddr";
break;
case 9:
switch (sel) {
case 0:
gen_op_mtc0_count();
rn = "Count";
break;
/* 6,7 are implementation dependent */
default:
goto die;
}
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
case 10:
switch (sel) {
case 0:
gen_op_mtc0_entryhi();
rn = "EntryHi";
break;
default:
goto die;
}
break;
case 11:
switch (sel) {
case 0:
gen_op_mtc0_compare();
rn = "Compare";
break;
/* 6,7 are implementation dependent */
default:
goto die;
}
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
case 12:
switch (sel) {
case 0:
gen_op_mtc0_status();
rn = "Status";
break;
case 1:
gen_op_mtc0_intctl();
rn = "IntCtl";
break;
case 2:
gen_op_mtc0_srsctl();
rn = "SRSCtl";
break;
case 3:
// gen_op_mtc0_srsmap(); /* shadow registers */
rn = "SRSMap";
// break;
default:
goto die;
}
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
case 13:
switch (sel) {
case 0:
gen_op_mtc0_cause();
rn = "Cause";
break;
default:
goto die;
}
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
case 14:
switch (sel) {
case 0:
gen_op_mtc0_epc();
rn = "EPC";
break;
default:
goto die;
}
break;
case 15:
switch (sel) {
case 0:
/* ignored */
rn = "PRid";
break;
case 1:
gen_op_mtc0_ebase();
rn = "EBase";
break;
default:
goto die;
}
break;
case 16:
switch (sel) {
case 0:
gen_op_mtc0_config0();
rn = "Config";
break;
case 1:
/* ignored */
rn = "Config1";
break;
case 2:
gen_op_mtc0_config2();
rn = "Config2";
break;
case 3:
/* ignored */
rn = "Config3";
break;
/* 6,7 are implementation dependent */
default:
rn = "Invalid config selector";
goto die;
}
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
case 17:
switch (sel) {
case 0:
/* ignored */
rn = "LLAddr";
break;
default:
goto die;
}
break;
case 18:
switch (sel) {
case 0:
gen_op_mtc0_watchlo0();
rn = "WatchLo";
break;
case 1:
// gen_op_mtc0_watchlo1();
rn = "WatchLo1";
// break;
case 2:
// gen_op_mtc0_watchlo2();
rn = "WatchLo2";
// break;
case 3:
// gen_op_mtc0_watchlo3();
rn = "WatchLo3";
// break;
case 4:
// gen_op_mtc0_watchlo4();
rn = "WatchLo4";
// break;
case 5:
// gen_op_mtc0_watchlo5();
rn = "WatchLo5";
// break;
case 6:
// gen_op_mtc0_watchlo6();
rn = "WatchLo6";
// break;
case 7:
// gen_op_mtc0_watchlo7();
rn = "WatchLo7";
// break;
default:
goto die;
}
break;
case 19:
switch (sel) {
case 0:
gen_op_mtc0_watchhi0();
rn = "WatchHi";
break;
case 1:
// gen_op_mtc0_watchhi1();
rn = "WatchHi1";
// break;
case 2:
// gen_op_mtc0_watchhi2();
rn = "WatchHi2";
// break;
case 3:
// gen_op_mtc0_watchhi3();
rn = "WatchHi3";
// break;
case 4:
// gen_op_mtc0_watchhi4();
rn = "WatchHi4";
// break;
case 5:
// gen_op_mtc0_watchhi5();
rn = "WatchHi5";
// break;
case 6:
// gen_op_mtc0_watchhi6();
rn = "WatchHi6";
// break;
case 7:
// gen_op_mtc0_watchhi7();
rn = "WatchHi7";
// break;
default:
goto die;
}
break;
case 20:
switch (sel) {
case 0:
/* 64 bit MMU only */
gen_op_mtc0_xcontext();
rn = "XContext";
break;
default:
goto die;
}
break;
case 21:
/* Officially reserved, but sel 0 is used for R1x000 framemask */
switch (sel) {
case 0:
gen_op_mtc0_framemask();
rn = "Framemask";
break;
default:
goto die;
}
break;
case 22:
/* ignored */
rn = "Diagnostic"; /* implementation dependent */
break;
case 23:
switch (sel) {
case 0:
gen_op_mtc0_debug(); /* EJTAG support */
rn = "Debug";
break;
case 1:
// gen_op_mtc0_tracecontrol(); /* PDtrace support */
rn = "TraceControl";
// break;
case 2:
// gen_op_mtc0_tracecontrol2(); /* PDtrace support */
rn = "TraceControl2";
// break;
case 3:
// gen_op_mtc0_usertracedata(); /* PDtrace support */
rn = "UserTraceData";
// break;
case 4:
// gen_op_mtc0_debug(); /* PDtrace support */
rn = "TraceBPC";
// break;
default:
goto die;
}
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
case 24:
switch (sel) {
case 0:
gen_op_mtc0_depc(); /* EJTAG support */
rn = "DEPC";
break;
default:
goto die;
}
break;
case 25:
switch (sel) {
case 0:
gen_op_mtc0_performance0();
rn = "Performance0";
break;
case 1:
// gen_op_mtc0_performance1();
rn = "Performance1";
// break;
case 2:
// gen_op_mtc0_performance2();
rn = "Performance2";
// break;
case 3:
// gen_op_mtc0_performance3();
rn = "Performance3";
// break;
case 4:
// gen_op_mtc0_performance4();
rn = "Performance4";
// break;
case 5:
// gen_op_mtc0_performance5();
rn = "Performance5";
// break;
case 6:
// gen_op_mtc0_performance6();
rn = "Performance6";
// break;
case 7:
// gen_op_mtc0_performance7();
rn = "Performance7";
// break;
default:
goto die;
}
break;
case 26:
/* ignored */
rn = "ECC";
break;
case 27:
switch (sel) {
case 0 ... 3:
/* ignored */
rn = "CacheErr";
break;
default:
goto die;
}
break;
case 28:
switch (sel) {
case 0:
case 2:
case 4:
case 6:
gen_op_mtc0_taglo();
rn = "TagLo";
break;
case 1:
case 3:
case 5:
case 7:
gen_op_mtc0_datalo();
rn = "DataLo";
break;
default:
goto die;
}
break;
case 29:
switch (sel) {
case 0:
case 2:
case 4:
case 6:
gen_op_mtc0_taghi();
rn = "TagHi";
break;
case 1:
case 3:
case 5:
case 7:
gen_op_mtc0_datahi();
rn = "DataHi";
break;
default:
rn = "invalid sel";
goto die;
}
break;
case 30:
switch (sel) {
case 0:
gen_op_mtc0_errorepc();
rn = "ErrorEPC";
break;
default:
goto die;
}
break;
case 31:
switch (sel) {
case 0:
gen_op_mtc0_desave(); /* EJTAG support */
rn = "DESAVE";
break;
default:
goto die;
}
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
default:
goto die;
}
#if defined MIPS_DEBUG_DISAS
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "mtc0 %s (reg %d sel %d)\n",
rn, reg, sel);
}
#endif
return;
die:
#if defined MIPS_DEBUG_DISAS
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "mtc0 %s (reg %d sel %d)\n",
rn, reg, sel);
}
#endif
generate_exception(ctx, EXCP_RI);
}
static void gen_cp0 (DisasContext *ctx, uint32_t opc, int rt, int rd)
{
const char *opn = "unk";
if ((!ctx->CP0_Status & (1 << CP0St_CU0) &&
(ctx->hflags & MIPS_HFLAG_UM)) &&
!(ctx->hflags & MIPS_HFLAG_ERL) &&
!(ctx->hflags & MIPS_HFLAG_EXL)) {
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "CP0 is not usable\n");
}
generate_exception (ctx, EXCP_CpU);
return;
}
switch (opc) {
case OPC_MFC0:
if (rt == 0) {
/* Treat as NOP */
return;
}
gen_mfc0(ctx, rd, ctx->opcode & 0x7);
gen_op_store_T0_gpr(rt);
opn = "mfc0";
break;
case OPC_MTC0:
/* If we get an exception, we want to restart at next instruction */
/* XXX: breaks for mtc in delay slot */
ctx->pc += 4;
save_cpu_state(ctx, 1);
ctx->pc -= 4;
GEN_LOAD_REG_TN(T0, rt);
gen_mtc0(ctx, rd, ctx->opcode & 0x7);
opn = "mtc0";
break;
#if defined(MIPS_USES_R4K_TLB)
case OPC_TLBWI:
gen_op_tlbwi();
opn = "tlbwi";
break;
case OPC_TLBWR:
gen_op_tlbwr();
opn = "tlbwr";
break;
case OPC_TLBP:
gen_op_tlbp();
opn = "tlbp";
break;
case OPC_TLBR:
gen_op_tlbr();
opn = "tlbr";
break;
#endif
case OPC_ERET:
opn = "eret";
save_cpu_state(ctx, 0);
gen_op_eret();
ctx->bstate = BS_EXCP;
break;
case OPC_DERET:
opn = "deret";
if (!(ctx->hflags & MIPS_HFLAG_DM)) {
generate_exception(ctx, EXCP_RI);
} else {
save_cpu_state(ctx, 0);
gen_op_deret();
ctx->bstate = BS_EXCP;
}
break;
case OPC_WAIT:
opn = "wait";
/* If we get an exception, we want to restart at next instruction */
ctx->pc += 4;
save_cpu_state(ctx, 1);
ctx->pc -= 4;
gen_op_wait();
ctx->bstate = BS_EXCP;
break;
default:
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "Invalid CP0 opcode: %08x %03x %03x %03x\n",
ctx->opcode, ctx->opcode >> 26, ctx->opcode & 0x3F,
((ctx->opcode >> 16) & 0x1F));
}
generate_exception(ctx, EXCP_RI);
return;
}
MIPS_DEBUG("%s %s %d", opn, regnames[rt], rd);
}
#ifdef MIPS_USES_FPU
/* CP1 Branches (before delay slot) */
static void gen_compute_branch1 (DisasContext *ctx, uint32_t op,
int32_t offset)
{
target_ulong btarget;
btarget = ctx->pc + 4 + offset;
switch (op) {
case OPC_BC1F:
gen_op_bc1f();
MIPS_DEBUG("bc1f " TLSZ, btarget);
goto not_likely;
case OPC_BC1FL:
gen_op_bc1f();
MIPS_DEBUG("bc1fl " TLSZ, btarget);
goto likely;
case OPC_BC1T:
gen_op_bc1t();
MIPS_DEBUG("bc1t " TLSZ, btarget);
not_likely:
ctx->hflags |= MIPS_HFLAG_BC;
break;
case OPC_BC1TL:
gen_op_bc1t();
MIPS_DEBUG("bc1tl " TLSZ, btarget);
likely:
ctx->hflags |= MIPS_HFLAG_BL;
break;
default:
MIPS_INVAL("cp1 branch/jump");
generate_exception_err (ctx, EXCP_RI, 1);
return;
}
gen_op_set_bcond();
MIPS_DEBUG("enter ds: cond %02x target " TLSZ,
ctx->hflags, btarget);
ctx->btarget = btarget;
return;
}
/* Coprocessor 1 (FPU) */
static void gen_cp1 (DisasContext *ctx, uint32_t opc, int rt, int fs)
{
const char *opn = "unk";
switch (opc) {
case OPC_MFC1:
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_mfc1();
GEN_STORE_TN_REG(rt, T0);
opn = "mfc1";
break;
case OPC_MTC1:
GEN_LOAD_REG_TN(T0, rt);
gen_op_mtc1();
GEN_STORE_FTN_FREG(fs, WT0);
opn = "mtc1";
break;
case OPC_CFC1:
if (fs != 0 && fs != 31) {
MIPS_INVAL("cfc1 freg");
generate_exception_err (ctx, EXCP_RI, 1);
return;
}
GEN_LOAD_IMM_TN(T1, fs);
gen_op_cfc1();
GEN_STORE_TN_REG(rt, T0);
opn = "cfc1";
break;
case OPC_CTC1:
if (fs != 0 && fs != 31) {
MIPS_INVAL("ctc1 freg");
generate_exception_err (ctx, EXCP_RI, 1);
return;
}
GEN_LOAD_IMM_TN(T1, fs);
GEN_LOAD_REG_TN(T0, rt);
gen_op_ctc1();
opn = "ctc1";
break;
default:
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "Invalid CP1 opcode: %08x %03x %03x %03x\n",
ctx->opcode, ctx->opcode >> 26, ctx->opcode & 0x3F,
((ctx->opcode >> 16) & 0x1F));
}
generate_exception_err (ctx, EXCP_RI, 1);
return;
}
MIPS_DEBUG("%s %s %s", opn, regnames[rt], fregnames[fs]);
}
/* verify if floating point register is valid; an operation is not defined
* if bit 0 of any register specification is set and the FR bit in the
* Status register equals zero, since the register numbers specify an
* even-odd pair of adjacent coprocessor general registers. When the FR bit
* in the Status register equals one, both even and odd register numbers
* are valid.
*
* Multiple float registers can be checked by calling
* CHECK_FR(ctx, freg1 | freg2 | ... | fregN);
*/
#define CHECK_FR(ctx, freg) do { \
if (!((ctx)->CP0_Status & (1<<CP0St_FR)) && ((freg) & 1)) { \
generate_exception_err (ctx, EXCP_RI, 1); \
return; \
} \
} while(0)
#define FOP(func, fmt) (((fmt) << 21) | (func))
static void gen_farith (DisasContext *ctx, uint32_t op1, int ft, int fs, int fd)
{
const char *opn = "unk";
const char *condnames[] = {
"c.f",
"c.un",
"c.eq",
"c.ueq",
"c.olt",
"c.ult",
"c.ole",
"c.ule",
"c.sf",
"c.ngle",
"c.seq",
"c.ngl",
"c.lt",
"c.nge",
"c.le",
"c.ngt",
};
int binary = 0;
uint32_t func = ctx->opcode & 0x3f;
switch (ctx->opcode & FOP(0x3f, 0x1f)) {
case FOP(0, 17):
CHECK_FR(ctx, fs | ft | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
GEN_LOAD_FREG_FTN(DT1, ft);
gen_op_float_add_d();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "add.d";
binary = 1;
break;
case FOP(1, 17):
CHECK_FR(ctx, fs | ft | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
GEN_LOAD_FREG_FTN(DT1, ft);
gen_op_float_sub_d();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "sub.d";
binary = 1;
break;
case FOP(2, 17):
CHECK_FR(ctx, fs | ft | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
GEN_LOAD_FREG_FTN(DT1, ft);
gen_op_float_mul_d();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "mul.d";
binary = 1;
break;
case FOP(3, 17):
CHECK_FR(ctx, fs | ft | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
GEN_LOAD_FREG_FTN(DT1, ft);
gen_op_float_div_d();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "div.d";
binary = 1;
break;
case FOP(4, 17):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_sqrt_d();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "sqrt.d";
break;
case FOP(5, 17):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_abs_d();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "abs.d";
break;
case FOP(6, 17):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_mov_d();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "mov.d";
break;
case FOP(7, 17):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_chs_d();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "neg.d";
break;
/* 8 - round.l */
/* 9 - trunc.l */
/* 10 - ceil.l */
/* 11 - floor.l */
case FOP(12, 17):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_roundw_d();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "round.w.d";
break;
case FOP(13, 17):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_truncw_d();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "trunc.w.d";
break;
case FOP(14, 17):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_ceilw_d();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "ceil.w.d";
break;
case FOP(15, 17):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_floorw_d();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "floor.w.d";
break;
case FOP(33, 16): /* cvt.d.s */
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_cvtd_s();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "cvt.d.s";
break;
case FOP(33, 20): /* cvt.d.w */
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_cvtd_w();
GEN_STORE_FTN_FREG(fd, DT2);
opn = "cvt.d.w";
break;
case FOP(48, 17):
case FOP(49, 17):
case FOP(50, 17):
case FOP(51, 17):
case FOP(52, 17):
case FOP(53, 17):
case FOP(54, 17):
case FOP(55, 17):
case FOP(56, 17):
case FOP(57, 17):
case FOP(58, 17):
case FOP(59, 17):
case FOP(60, 17):
case FOP(61, 17):
case FOP(62, 17):
case FOP(63, 17):
CHECK_FR(ctx, fs | ft);
GEN_LOAD_FREG_FTN(DT0, fs);
GEN_LOAD_FREG_FTN(DT1, ft);
gen_cmp_d(func-48);
opn = condnames[func-48];
break;
case FOP(0, 16):
CHECK_FR(ctx, fs | ft | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
GEN_LOAD_FREG_FTN(WT1, ft);
gen_op_float_add_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "add.s";
binary = 1;
break;
case FOP(1, 16):
CHECK_FR(ctx, fs | ft | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
GEN_LOAD_FREG_FTN(WT1, ft);
gen_op_float_sub_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "sub.s";
binary = 1;
break;
case FOP(2, 16):
CHECK_FR(ctx, fs | ft | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
GEN_LOAD_FREG_FTN(WT1, ft);
gen_op_float_mul_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "mul.s";
binary = 1;
break;
case FOP(3, 16):
CHECK_FR(ctx, fs | ft | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
GEN_LOAD_FREG_FTN(WT1, ft);
gen_op_float_div_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "div.s";
binary = 1;
break;
case FOP(4, 16):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_sqrt_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "sqrt.s";
break;
case FOP(5, 16):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_abs_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "abs.s";
break;
case FOP(6, 16):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_mov_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "mov.s";
break;
case FOP(7, 16):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_chs_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "neg.s";
break;
case FOP(12, 16):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_roundw_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "round.w.s";
break;
case FOP(13, 16):
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_truncw_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "trunc.w.s";
break;
case FOP(32, 17): /* cvt.s.d */
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_cvts_d();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "cvt.s.d";
break;
case FOP(32, 20): /* cvt.s.w */
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_cvts_w();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "cvt.s.w";
break;
case FOP(36, 16): /* cvt.w.s */
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(WT0, fs);
gen_op_float_cvtw_s();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "cvt.w.s";
break;
case FOP(36, 17): /* cvt.w.d */
CHECK_FR(ctx, fs | fd);
GEN_LOAD_FREG_FTN(DT0, fs);
gen_op_float_cvtw_d();
GEN_STORE_FTN_FREG(fd, WT2);
opn = "cvt.w.d";
break;
case FOP(48, 16):
case FOP(49, 16):
case FOP(50, 16):
case FOP(51, 16):
case FOP(52, 16):
case FOP(53, 16):
case FOP(54, 16):
case FOP(55, 16):
case FOP(56, 16):
case FOP(57, 16):
case FOP(58, 16):
case FOP(59, 16):
case FOP(60, 16):
case FOP(61, 16):
case FOP(62, 16):
case FOP(63, 16):
CHECK_FR(ctx, fs | ft);
GEN_LOAD_FREG_FTN(WT0, fs);
GEN_LOAD_FREG_FTN(WT1, ft);
gen_cmp_s(func-48);
opn = condnames[func-48];
break;
default:
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "Invalid FP arith function: %08x %03x %03x %03x\n",
ctx->opcode, ctx->opcode >> 26, ctx->opcode & 0x3F,
((ctx->opcode >> 16) & 0x1F));
}
generate_exception_err (ctx, EXCP_RI, 1);
return;
}
if (binary)
MIPS_DEBUG("%s %s, %s, %s", opn, fregnames[fd], fregnames[fs], fregnames[ft]);
else
MIPS_DEBUG("%s %s,%s", opn, fregnames[fd], fregnames[fs]);
}
static void gen_movci (DisasContext *ctx, int rd, int rs, int cc, int tf)
{
uint32_t ccbit;
if (cc)
ccbit = 1 << (24 + cc);
else
ccbit = 1 << 23;
if (!tf)
gen_op_movf(ccbit, rd, rs);
else
gen_op_movt(ccbit, rd, rs);
}
#endif /* MIPS_USES_FPU */
/* ISA extensions (ASEs) */
/* MIPS16 extension to MIPS32 */
/* SmartMIPS extension to MIPS32 */
#ifdef MIPS_HAS_MIPS64
/* Coprocessor 3 (FPU) */
/* MDMX extension to MIPS64 */
/* MIPS-3D extension to MIPS64 */
#endif
static void gen_blikely(DisasContext *ctx)
{
int l1;
l1 = gen_new_label();
gen_op_jnz_T2(l1);
gen_op_save_state(ctx->hflags & ~MIPS_HFLAG_BMASK);
gen_goto_tb(ctx, 1, ctx->pc + 4);
gen_set_label(l1);
}
static void decode_opc (DisasContext *ctx)
{
int32_t offset;
int rs, rt, rd, sa;
uint32_t op, op1, op2;
int16_t imm;
/* make sure instructions are on a word boundary */
if (ctx->pc & 0x3) {
generate_exception(ctx, EXCP_AdEL);
return;
}
if ((ctx->hflags & MIPS_HFLAG_BMASK) == MIPS_HFLAG_BL) {
/* Handle blikely not taken case */
MIPS_DEBUG("blikely condition (" TLSZ ")", ctx->pc + 4);
gen_blikely(ctx);
}
op = MASK_OP_MAJOR(ctx->opcode);
rs = (ctx->opcode >> 21) & 0x1f;
rt = (ctx->opcode >> 16) & 0x1f;
rd = (ctx->opcode >> 11) & 0x1f;
sa = (ctx->opcode >> 6) & 0x1f;
imm = (int16_t)ctx->opcode;
switch (op) {
case OPC_SPECIAL:
op1 = MASK_SPECIAL(ctx->opcode);
switch (op1) {
case OPC_SLL: /* Arithmetic with immediate */
case OPC_SRL ... OPC_SRA:
gen_arith_imm(ctx, op1, rd, rt, sa);
break;
case OPC_SLLV: /* Arithmetic */
case OPC_SRLV ... OPC_SRAV:
case OPC_MOVZ ... OPC_MOVN:
case OPC_ADD ... OPC_NOR:
case OPC_SLT ... OPC_SLTU:
gen_arith(ctx, op1, rd, rs, rt);
break;
case OPC_MULT ... OPC_DIVU:
gen_muldiv(ctx, op1, rs, rt);
break;
case OPC_JR ... OPC_JALR:
gen_compute_branch(ctx, op1, rs, rd, sa);
return;
case OPC_TGE ... OPC_TEQ: /* Traps */
case OPC_TNE:
gen_trap(ctx, op1, rs, rt, -1);
break;
case OPC_MFHI: /* Move from HI/LO */
case OPC_MFLO:
gen_HILO(ctx, op1, rd);
break;
case OPC_MTHI:
case OPC_MTLO: /* Move to HI/LO */
gen_HILO(ctx, op1, rs);
break;
case OPC_PMON: /* Pmon entry point */
gen_op_pmon(sa);
break;
case OPC_SYSCALL:
generate_exception(ctx, EXCP_SYSCALL);
ctx->bstate = BS_EXCP;
break;
case OPC_BREAK:
generate_exception(ctx, EXCP_BREAK);
break;
case OPC_SPIM: /* SPIM ? */
/* Implemented as RI exception for now. */
MIPS_INVAL("spim (unofficial)");
generate_exception(ctx, EXCP_RI);
break;
case OPC_SYNC:
/* Treat as a noop. */
break;
#ifdef MIPS_USES_FPU
case OPC_MOVCI:
gen_op_cp1_enabled();
gen_movci(ctx, rd, rs, (ctx->opcode >> 18) & 0x7,
(ctx->opcode >> 16) & 1);
break;
#endif
#ifdef MIPS_HAS_MIPS64
/* MIPS64 specific opcodes */
case OPC_DSLL:
case OPC_DSRL ... OPC_DSRA:
case OPC_DSLL32:
case OPC_DSRL32 ... OPC_DSRA32:
gen_arith_imm(ctx, op1, rd, rt, sa);
break;
case OPC_DSLLV:
case OPC_DSRLV ... OPC_DSRAV:
case OPC_DADD ... OPC_DSUBU:
gen_arith(ctx, op1, rd, rs, rt);
break;
case OPC_DMULT ... OPC_DDIVU:
gen_muldiv(ctx, op1, rs, rt);
break;
#endif
default: /* Invalid */
MIPS_INVAL("special");
generate_exception(ctx, EXCP_RI);
break;
}
break;
case OPC_SPECIAL2:
op1 = MASK_SPECIAL2(ctx->opcode);
switch (op1) {
case OPC_MADD ... OPC_MADDU: /* Multiply and add/sub */
case OPC_MSUB ... OPC_MSUBU:
gen_muldiv(ctx, op1, rs, rt);
break;
case OPC_MUL:
gen_arith(ctx, op1, rd, rs, rt);
break;
case OPC_CLZ ... OPC_CLO:
gen_cl(ctx, op1, rd, rs);
break;
case OPC_SDBBP:
/* XXX: not clear which exception should be raised
* when in debug mode...
*/
if (!(ctx->hflags & MIPS_HFLAG_DM)) {
generate_exception(ctx, EXCP_DBp);
} else {
generate_exception(ctx, EXCP_DBp);
}
/* Treat as a noop */
break;
#ifdef MIPS_HAS_MIPS64
case OPC_DCLZ ... OPC_DCLO:
gen_cl(ctx, op1, rd, rs);
break;
#endif
default: /* Invalid */
MIPS_INVAL("special2");
generate_exception(ctx, EXCP_RI);
break;
}
break;
case OPC_SPECIAL3:
op1 = MASK_SPECIAL3(ctx->opcode);
switch (op1) {
case OPC_EXT:
case OPC_INS:
gen_bitops(ctx, op1, rt, rs, sa, rd);
break;
case OPC_BSHFL:
op2 = MASK_BSHFL(ctx->opcode);
switch (op2) {
case OPC_WSBH:
GEN_LOAD_REG_TN(T1, rt);
gen_op_wsbh();
break;
case OPC_SEB:
GEN_LOAD_REG_TN(T1, rt);
gen_op_seb();
break;
case OPC_SEH:
GEN_LOAD_REG_TN(T1, rt);
gen_op_seh();
break;
default: /* Invalid */
MIPS_INVAL("bshfl");
generate_exception(ctx, EXCP_RI);
break;
}
GEN_STORE_TN_REG(rd, T0);
break;
case OPC_RDHWR:
switch (rd) {
case 0:
gen_op_rdhwr_cpunum();
break;
case 1:
gen_op_rdhwr_synci_step();
break;
case 2:
gen_op_rdhwr_cc();
break;
case 3:
gen_op_rdhwr_ccres();
break;
default: /* Invalid */
MIPS_INVAL("rdhwr");
generate_exception(ctx, EXCP_RI);
break;
}
GEN_STORE_TN_REG(rt, T0);
break;
#ifdef MIPS_HAS_MIPS64
case OPC_DEXTM ... OPC_DEXT:
case OPC_DINSM ... OPC_DINS:
gen_bitops(ctx, op1, rt, rs, sa, rd);
break;
case OPC_DBSHFL:
op2 = MASK_DBSHFL(ctx->opcode);
switch (op2) {
case OPC_DSBH:
GEN_LOAD_REG_TN(T1, rt);
gen_op_dsbh();
break;
case OPC_DSHD:
GEN_LOAD_REG_TN(T1, rt);
gen_op_dshd();
break;
default: /* Invalid */
MIPS_INVAL("dbshfl");
generate_exception(ctx, EXCP_RI);
break;
}
GEN_STORE_TN_REG(rd, T0);
#endif
default: /* Invalid */
MIPS_INVAL("special3");
generate_exception(ctx, EXCP_RI);
break;
}
break;
case OPC_REGIMM:
op1 = MASK_REGIMM(ctx->opcode);
switch (op1) {
case OPC_BLTZ ... OPC_BGEZL: /* REGIMM branches */
case OPC_BLTZAL ... OPC_BGEZALL:
gen_compute_branch(ctx, op1, rs, -1, imm << 2);
return;
case OPC_TGEI ... OPC_TEQI: /* REGIMM traps */
case OPC_TNEI:
gen_trap(ctx, op1, rs, -1, imm);
break;
case OPC_SYNCI:
/* treat as noop */
break;
default: /* Invalid */
MIPS_INVAL("REGIMM");
generate_exception(ctx, EXCP_RI);
break;
}
break;
case OPC_CP0:
op1 = MASK_CP0(ctx->opcode);
switch (op1) {
case OPC_MFC0:
case OPC_MTC0:
#ifdef MIPS_HAS_MIPS64
case OPC_DMFC0:
case OPC_DMTC0:
#endif
gen_cp0(ctx, op1, rt, rd);
break;
case OPC_C0_FIRST ... OPC_C0_LAST:
gen_cp0(ctx, MASK_C0(ctx->opcode), rt, rd);
break;
case OPC_MFMC0:
op2 = MASK_MFMC0(ctx->opcode);
switch (op2) {
case OPC_DI:
gen_op_di();
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
case OPC_EI:
gen_op_ei();
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
default: /* Invalid */
MIPS_INVAL("MFMC0");
generate_exception(ctx, EXCP_RI);
break;
}
GEN_STORE_TN_REG(rt, T0);
break;
/* Shadow registers (not implemented). */
case OPC_RDPGPR:
case OPC_WRPGPR:
default:
generate_exception(ctx, EXCP_RI);
break;
}
break;
case OPC_ADDI ... OPC_LUI: /* Arithmetic with immediate opcode */
gen_arith_imm(ctx, op, rt, rs, imm);
break;
case OPC_J ... OPC_JAL: /* Jump */
offset = (int32_t)(ctx->opcode & 0x3FFFFFF) << 2;
gen_compute_branch(ctx, op, rs, rt, offset);
return;
case OPC_BEQ ... OPC_BGTZ: /* Branch */
case OPC_BEQL ... OPC_BGTZL:
gen_compute_branch(ctx, op, rs, rt, imm << 2);
return;
case OPC_LB ... OPC_LWR: /* Load and stores */
case OPC_SB ... OPC_SW:
case OPC_SWR:
case OPC_LL:
case OPC_SC:
gen_ldst(ctx, op, rt, rs, imm);
break;
case OPC_CACHE:
/* Treat as a noop */
break;
case OPC_PREF:
/* Treat as a noop */
break;
/* Floating point. */
case OPC_LWC1:
case OPC_LDC1:
case OPC_SWC1:
case OPC_SDC1:
#if defined(MIPS_USES_FPU)
save_cpu_state(ctx, 1);
gen_op_cp1_enabled();
gen_flt_ldst(ctx, op, rt, rs, imm);
#else
generate_exception_err(ctx, EXCP_CpU, 1);
#endif
break;
case OPC_CP1:
#if defined(MIPS_USES_FPU)
save_cpu_state(ctx, 1);
gen_op_cp1_enabled();
op1 = MASK_CP1(ctx->opcode);
switch (op1) {
case OPC_MFC1:
case OPC_CFC1:
case OPC_MTC1:
case OPC_CTC1:
gen_cp1(ctx, op1, rt, rd);
break;
case OPC_BC1:
gen_compute_branch1(ctx, MASK_CP1_BCOND(ctx->opcode), imm << 2);
return;
case OPC_S_FMT:
case OPC_D_FMT:
case OPC_W_FMT:
case OPC_L_FMT:
gen_farith(ctx, MASK_CP1_FUNC(ctx->opcode), rt, rd, sa);
break;
default:
generate_exception_err(ctx, EXCP_RI, 1);
break;
}
#else
generate_exception_err(ctx, EXCP_CpU, 1);
#endif
break;
/* COP2. */
case OPC_LWC2:
case OPC_LDC2:
case OPC_SWC2:
case OPC_SDC2:
case OPC_CP2:
/* COP2: Not implemented. */
generate_exception_err(ctx, EXCP_CpU, 2);
break;
#ifdef MIPS_USES_FPU
case OPC_CP3:
gen_op_cp1_enabled();
op1 = MASK_CP3(ctx->opcode);
switch (op1) {
/* Not implemented */
default:
generate_exception_err(ctx, EXCP_RI, 1);
break;
}
break;
#endif
#ifdef MIPS_HAS_MIPS64
/* MIPS64 opcodes */
case OPC_LWU:
case OPC_LDL ... OPC_LDR:
case OPC_SDL ... OPC_SDR:
case OPC_LLD:
case OPC_LD:
case OPC_SCD:
case OPC_SD:
gen_ldst(ctx, op, rt, rs, imm);
break;
case OPC_DADDI ... OPC_DADDIU:
gen_arith_imm(ctx, op, rt, rs, imm);
break;
#endif
#ifdef MIPS_HAS_MIPS16
case OPC_JALX:
/* MIPS16: Not implemented. */
#endif
#ifdef MIPS_HAS_MDMX
case OPC_MDMX:
/* MDMX: Not implemented. */
#endif
default: /* Invalid */
MIPS_INVAL("");
generate_exception(ctx, EXCP_RI);
break;
}
if (ctx->hflags & MIPS_HFLAG_BMASK) {
int hflags = ctx->hflags;
/* Branches completion */
ctx->hflags &= ~MIPS_HFLAG_BMASK;
ctx->bstate = BS_BRANCH;
save_cpu_state(ctx, 0);
switch (hflags & MIPS_HFLAG_BMASK) {
case MIPS_HFLAG_B:
/* unconditional branch */
MIPS_DEBUG("unconditional branch");
gen_goto_tb(ctx, 0, ctx->btarget);
break;
case MIPS_HFLAG_BL:
/* blikely taken case */
MIPS_DEBUG("blikely branch taken");
gen_goto_tb(ctx, 0, ctx->btarget);
break;
case MIPS_HFLAG_BC:
/* Conditional branch */
MIPS_DEBUG("conditional branch");
{
int l1;
l1 = gen_new_label();
gen_op_jnz_T2(l1);
gen_goto_tb(ctx, 1, ctx->pc + 4);
gen_set_label(l1);
gen_goto_tb(ctx, 0, ctx->btarget);
}
break;
case MIPS_HFLAG_BR:
/* unconditional branch to register */
MIPS_DEBUG("branch to register");
gen_op_breg();
break;
default:
MIPS_DEBUG("unknown branch");
break;
}
}
}
int gen_intermediate_code_internal (CPUState *env, TranslationBlock *tb,
int search_pc)
{
DisasContext ctx, *ctxp = &ctx;
target_ulong pc_start;
uint16_t *gen_opc_end;
int j, lj = -1;
if (search_pc && loglevel)
fprintf (logfile, "search pc %d\n", search_pc);
pc_start = tb->pc;
gen_opc_ptr = gen_opc_buf;
gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
gen_opparam_ptr = gen_opparam_buf;
nb_gen_labels = 0;
ctx.pc = pc_start;
ctx.saved_pc = -1;
ctx.tb = tb;
ctx.bstate = BS_NONE;
/* Restore delay slot state from the tb context. */
ctx.hflags = tb->flags;
ctx.saved_hflags = ctx.hflags;
if (ctx.hflags & MIPS_HFLAG_BR) {
gen_op_restore_breg_target();
} else if (ctx.hflags & MIPS_HFLAG_B) {
ctx.btarget = env->btarget;
} else if (ctx.hflags & MIPS_HFLAG_BMASK) {
/* If we are in the delay slot of a conditional branch,
* restore the branch condition from env->bcond to T2
*/
ctx.btarget = env->btarget;
gen_op_restore_bcond();
}
#if defined(CONFIG_USER_ONLY)
ctx.mem_idx = 0;
#else
ctx.mem_idx = !((ctx.hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM);
#endif
ctx.CP0_Status = env->CP0_Status;
#ifdef DEBUG_DISAS
if (loglevel & CPU_LOG_TB_CPU) {
fprintf(logfile, "------------------------------------------------\n");
/* FIXME: This may print out stale hflags from env... */
cpu_dump_state(env, logfile, fprintf, 0);
}
#endif
#if defined MIPS_DEBUG_DISAS
if (loglevel & CPU_LOG_TB_IN_ASM)
fprintf(logfile, "\ntb %p super %d cond %04x\n",
tb, ctx.mem_idx, ctx.hflags);
#endif
while (ctx.bstate == BS_NONE && gen_opc_ptr < gen_opc_end) {
if (env->nb_breakpoints > 0) {
for(j = 0; j < env->nb_breakpoints; j++) {
if (env->breakpoints[j] == ctx.pc) {
save_cpu_state(ctxp, 1);
ctx.bstate = BS_BRANCH;
gen_op_debug();
goto done_generating;
}
}
}
if (search_pc) {
j = gen_opc_ptr - gen_opc_buf;
if (lj < j) {
lj++;
while (lj < j)
gen_opc_instr_start[lj++] = 0;
}
gen_opc_pc[lj] = ctx.pc;
gen_opc_hflags[lj] = ctx.hflags & MIPS_HFLAG_BMASK;
gen_opc_instr_start[lj] = 1;
}
ctx.opcode = ldl_code(ctx.pc);
decode_opc(&ctx);
ctx.pc += 4;
if (env->singlestep_enabled)
break;
if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0)
break;
#if defined (MIPS_SINGLE_STEP)
break;
#endif
}
if (env->singlestep_enabled) {
save_cpu_state(ctxp, ctx.bstate == BS_NONE);
gen_op_debug();
goto done_generating;
}
else if (ctx.bstate != BS_BRANCH && ctx.bstate != BS_EXCP) {
save_cpu_state(ctxp, 0);
gen_goto_tb(&ctx, 0, ctx.pc);
}
gen_op_reset_T0();
/* Generate the return instruction */
gen_op_exit_tb();
done_generating:
*gen_opc_ptr = INDEX_op_end;
if (search_pc) {
j = gen_opc_ptr - gen_opc_buf;
lj++;
while (lj <= j)
gen_opc_instr_start[lj++] = 0;
tb->size = 0;
} else {
tb->size = ctx.pc - pc_start;
}
#ifdef DEBUG_DISAS
#if defined MIPS_DEBUG_DISAS
if (loglevel & CPU_LOG_TB_IN_ASM)
fprintf(logfile, "\n");
#endif
if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
target_disas(logfile, pc_start, ctx.pc - pc_start, 0);
fprintf(logfile, "\n");
}
if (loglevel & CPU_LOG_TB_OP) {
fprintf(logfile, "OP:\n");
dump_ops(gen_opc_buf, gen_opparam_buf);
fprintf(logfile, "\n");
}
if (loglevel & CPU_LOG_TB_CPU) {
fprintf(logfile, "---------------- %d %08x\n", ctx.bstate, ctx.hflags);
}
#endif
return 0;
}
int gen_intermediate_code (CPUState *env, struct TranslationBlock *tb)
{
return gen_intermediate_code_internal(env, tb, 0);
}
int gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb)
{
return gen_intermediate_code_internal(env, tb, 1);
}
#ifdef MIPS_USES_FPU
void fpu_dump_state(CPUState *env, FILE *f,
int (*fpu_fprintf)(FILE *f, const char *fmt, ...),
int flags)
{
int i;
# define printfpr(fp) do { \
fpu_fprintf(f, "w:%08x d:%08lx%08lx fd:%g fs:%g\n", \
(fp)->w[FP_ENDIAN_IDX], (fp)->w[0], (fp)->w[1], (fp)->fd, (fp)->fs[FP_ENDIAN_IDX]); \
} while(0)
fpu_fprintf(f, "CP1 FCR0 0x%08x FCR31 0x%08x SR.FR %d\n",
env->fcr0, env->fcr31,
(env->CP0_Status & (1 << CP0St_FR)) != 0);
fpu_fprintf(f, "FT0: "); printfpr(&env->ft0);
fpu_fprintf(f, "FT1: "); printfpr(&env->ft1);
fpu_fprintf(f, "FT2: "); printfpr(&env->ft2);
for(i = 0; i < 32; i += 2) {
fpu_fprintf(f, "%s: ", fregnames[i]);
printfpr(FPR(env, i));
}
#undef printfpr
}
void dump_fpu (CPUState *env)
{
if (loglevel) {
fprintf(logfile, "pc=0x" TLSZ " HI=0x" TLSZ " LO=0x" TLSZ " ds %04x " TLSZ " %d\n",
env->PC, env->HI, env->LO, env->hflags, env->btarget, env->bcond);
fpu_dump_state(env, logfile, fprintf, 0);
}
}
#endif /* MIPS_USES_FPU */
#if defined(MIPS_HAS_MIPS64) && defined(MIPS_DEBUG_SIGN_EXTENSIONS)
/* Debug help: The architecture requires 32bit code to maintain proper
sign-extened values on 64bit machines. */
#define SIGN_EXT_P(val) ((((val) & ~0x7fffffff) == 0) || (((val) & ~0x7fffffff) == ~0x7fffffff))
void cpu_mips_check_sign_extensions (CPUState *env, FILE *f,
int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
int flags)
{
int i;
if (!SIGN_EXT_P(env->PC))
cpu_fprintf(f, "BROKEN: pc=0x" TLSZ "\n", env->PC);
if (!SIGN_EXT_P(env->HI))
cpu_fprintf(f, "BROKEN: HI=0x" TLSZ "\n", env->HI);
if (!SIGN_EXT_P(env->LO))
cpu_fprintf(f, "BROKEN: LO=0x" TLSZ "\n", env->LO);
if (!SIGN_EXT_P(env->btarget))
cpu_fprintf(f, "BROKEN: btarget=0x" TLSZ "\n", env->btarget);
for (i = 0; i < 32; i++) {
if (!SIGN_EXT_P(env->gpr[i]))
cpu_fprintf(f, "BROKEN: %s=0x" TLSZ "\n", regnames[i], env->gpr[i]);
}
if (!SIGN_EXT_P(env->CP0_EPC))
cpu_fprintf(f, "BROKEN: EPC=0x" TLSZ "\n", env->CP0_EPC);
if (!SIGN_EXT_P(env->CP0_LLAddr))
cpu_fprintf(f, "BROKEN: LLAddr=0x" TLSZ "\n", env->CP0_LLAddr);
}
#endif
void cpu_dump_state (CPUState *env, FILE *f,
int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
int flags)
{
uint32_t c0_status;
int i;
cpu_fprintf(f, "pc=0x" TLSZ " HI=0x" TLSZ " LO=0x" TLSZ " ds %04x " TLSZ " %d\n",
env->PC, env->HI, env->LO, env->hflags, env->btarget, env->bcond);
for (i = 0; i < 32; i++) {
if ((i & 3) == 0)
cpu_fprintf(f, "GPR%02d:", i);
cpu_fprintf(f, " %s " TLSZ, regnames[i], env->gpr[i]);
if ((i & 3) == 3)
cpu_fprintf(f, "\n");
}
c0_status = env->CP0_Status;
if (env->hflags & MIPS_HFLAG_UM)
c0_status |= (1 << CP0St_UM);
if (env->hflags & MIPS_HFLAG_ERL)
c0_status |= (1 << CP0St_ERL);
if (env->hflags & MIPS_HFLAG_EXL)
c0_status |= (1 << CP0St_EXL);
cpu_fprintf(f, "CP0 Status 0x%08x Cause 0x%08x EPC 0x" TLSZ "\n",
c0_status, env->CP0_Cause, env->CP0_EPC);
cpu_fprintf(f, " Config0 0x%08x Config1 0x%08x LLAddr 0x" TLSZ "\n",
env->CP0_Config0, env->CP0_Config1, env->CP0_LLAddr);
#ifdef MIPS_USES_FPU
if (c0_status & (1 << CP0St_CU1))
fpu_dump_state(env, f, cpu_fprintf, flags);
#endif
#if defined(MIPS_HAS_MIPS64) && defined(MIPS_DEBUG_SIGN_EXTENSIONS)
cpu_mips_check_sign_extensions(env, f, cpu_fprintf, flags);
#endif
}
CPUMIPSState *cpu_mips_init (void)
{
CPUMIPSState *env;
env = qemu_mallocz(sizeof(CPUMIPSState));
if (!env)
return NULL;
cpu_exec_init(env);
cpu_reset(env);
return env;
}
void cpu_reset (CPUMIPSState *env)
{
memset(env, 0, offsetof(CPUMIPSState, breakpoints));
tlb_flush(env, 1);
/* Minimal init */
#if !defined(CONFIG_USER_ONLY)
if (env->hflags & MIPS_HFLAG_BMASK) {
/* If the exception was raised from a delay slot,
* come back to the jump. */
env->CP0_ErrorEPC = env->PC - 4;
env->hflags &= ~MIPS_HFLAG_BMASK;
} else {
env->CP0_ErrorEPC = env->PC;
}
env->PC = (int32_t)0xBFC00000;
#if defined (MIPS_USES_R4K_TLB)
env->CP0_random = MIPS_TLB_NB - 1;
env->tlb_in_use = MIPS_TLB_NB;
#endif
env->CP0_Wired = 0;
/* SMP not implemented */
env->CP0_EBase = (int32_t)0x80000000;
env->CP0_Config0 = MIPS_CONFIG0;
env->CP0_Config1 = MIPS_CONFIG1;
env->CP0_Config2 = MIPS_CONFIG2;
env->CP0_Config3 = MIPS_CONFIG3;
env->CP0_Status = (1 << CP0St_BEV) | (1 << CP0St_ERL);
env->CP0_WatchLo = 0;
env->hflags = MIPS_HFLAG_ERL;
/* Count register increments in debug mode, EJTAG version 1 */
env->CP0_Debug = (1 << CP0DB_CNT) | (0x1 << CP0DB_VER);
env->CP0_PRid = MIPS_CPU;
#endif
env->exception_index = EXCP_NONE;
#if defined(CONFIG_USER_ONLY)
env->hflags |= MIPS_HFLAG_UM;
env->user_mode_only = 1;
#endif
#ifdef MIPS_USES_FPU
env->fcr0 = MIPS_FCR0;
#endif
/* XXX some guesswork here, values are CPU specific */
env->SYNCI_Step = 16;
env->CCRes = 2;
}
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