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Honour current_tc for MIPS M{T,F}{HI,LO}, by Richard Sandiford.

Browse Source 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4604 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2008-05-28 13:37:19 +00:00
parent eaa728eec1
commit 893f986502
3 changed files with 46 additions and 45 deletions
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1
target-mips/cpu.h
View File

@ -159,6 +159,7 @@ struct CPUMIPSState {
CPUMIPSFPUContext *fpu; CPUMIPSFPUContext *fpu;
uint32_t current_tc; uint32_t current_tc;
target_ulong *current_tc_gprs; target_ulong *current_tc_gprs;
target_ulong *current_tc_hi;
uint32_t SEGBITS; uint32_t SEGBITS;
target_ulong SEGMask; target_ulong SEGMask;

89
target-mips/translate.c
View File

@ -423,7 +423,7 @@ enum {
}; };
/* global register indices */ /* global register indices */
static TCGv cpu_env, current_tc_gprs, cpu_T[2]; static TCGv cpu_env, current_tc_gprs, current_tc_hi, cpu_T[2];
/* The code generator doesn't like lots of temporaries, so maintain our own /* The code generator doesn't like lots of temporaries, so maintain our own
cache for reuse within a function. */ cache for reuse within a function. */
@ -531,6 +531,33 @@ static inline void gen_store_gpr (TCGv t, int reg)
tcg_gen_st_tl(t, current_tc_gprs, sizeof(target_ulong) * reg); tcg_gen_st_tl(t, current_tc_gprs, sizeof(target_ulong) * reg);
} }
/* Moves to/from HI and LO registers. */
static inline void gen_load_LO (TCGv t, int reg)
{
tcg_gen_ld_tl(t, current_tc_hi,
offsetof(CPUState, LO)
- offsetof(CPUState, HI)
+ sizeof(target_ulong) * reg);
}
static inline void gen_store_LO (TCGv t, int reg)
{
tcg_gen_st_tl(t, current_tc_hi,
offsetof(CPUState, LO)
- offsetof(CPUState, HI)
+ sizeof(target_ulong) * reg);
}
static inline void gen_load_HI (TCGv t, int reg)
{
tcg_gen_ld_tl(t, current_tc_hi, sizeof(target_ulong) * reg);
}
static inline void gen_store_HI (TCGv t, int reg)
{
tcg_gen_st_tl(t, current_tc_hi, sizeof(target_ulong) * reg);
}
/* Moves to/from shadow registers. */ /* Moves to/from shadow registers. */
static inline void gen_load_srsgpr (TCGv t, int reg) static inline void gen_load_srsgpr (TCGv t, int reg)
{ {
@ -1834,23 +1861,23 @@ static void gen_HILO (DisasContext *ctx, uint32_t opc, int reg)
} }
switch (opc) { switch (opc) {
case OPC_MFHI: case OPC_MFHI:
tcg_gen_ld_tl(cpu_T[0], cpu_env, offsetof(CPUState, HI[0])); gen_load_HI(cpu_T[0], 0);
gen_store_gpr(cpu_T[0], reg); gen_store_gpr(cpu_T[0], reg);
opn = "mfhi"; opn = "mfhi";
break; break;
case OPC_MFLO: case OPC_MFLO:
tcg_gen_ld_tl(cpu_T[0], cpu_env, offsetof(CPUState, LO[0])); gen_load_LO(cpu_T[0], 0);
gen_store_gpr(cpu_T[0], reg); gen_store_gpr(cpu_T[0], reg);
opn = "mflo"; opn = "mflo";
break; break;
case OPC_MTHI: case OPC_MTHI:
gen_load_gpr(cpu_T[0], reg); gen_load_gpr(cpu_T[0], reg);
tcg_gen_st_tl(cpu_T[0], cpu_env, offsetof(CPUState, HI[0])); gen_store_HI(cpu_T[0], 0);
opn = "mthi"; opn = "mthi";
break; break;
case OPC_MTLO: case OPC_MTLO:
gen_load_gpr(cpu_T[0], reg); gen_load_gpr(cpu_T[0], reg);
tcg_gen_st_tl(cpu_T[0], cpu_env, offsetof(CPUState, LO[0])); gen_store_LO(cpu_T[0], 0);
opn = "mtlo"; opn = "mtlo";
break; break;
default: default:
@ -1878,9 +1905,6 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
TCGv r_tmp1 = new_tmp(); TCGv r_tmp1 = new_tmp();
TCGv r_tmp2 = new_tmp(); TCGv r_tmp2 = new_tmp();
TCGv r_tmp3 = new_tmp(); TCGv r_tmp3 = new_tmp();
TCGv r_tc_off = new_tmp();
TCGv r_tc_off_tl = tcg_temp_new(TCG_TYPE_TL);
TCGv r_ptr = tcg_temp_new(TCG_TYPE_PTR);
tcg_gen_ext_i32_tl(r_tmp1, cpu_T[0]); tcg_gen_ext_i32_tl(r_tmp1, cpu_T[0]);
tcg_gen_ext_i32_tl(r_tmp2, cpu_T[1]); tcg_gen_ext_i32_tl(r_tmp2, cpu_T[1]);
@ -1888,16 +1912,11 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
tcg_gen_rem_i32(r_tmp1, r_tmp1, r_tmp2); tcg_gen_rem_i32(r_tmp1, r_tmp1, r_tmp2);
tcg_gen_trunc_tl_i32(cpu_T[0], r_tmp3); tcg_gen_trunc_tl_i32(cpu_T[0], r_tmp3);
tcg_gen_trunc_tl_i32(cpu_T[1], r_tmp1); tcg_gen_trunc_tl_i32(cpu_T[1], r_tmp1);
gen_store_LO(cpu_T[0], 0);
gen_store_HI(cpu_T[1], 0);
dead_tmp(r_tmp1); dead_tmp(r_tmp1);
dead_tmp(r_tmp2); dead_tmp(r_tmp2);
dead_tmp(r_tmp3); dead_tmp(r_tmp3);
tcg_gen_ld_i32(r_tc_off, cpu_env, offsetof(CPUState, current_tc));
tcg_gen_muli_i32(r_tc_off, r_tc_off, sizeof(target_ulong));
tcg_gen_ext_i32_ptr(r_tc_off_tl, r_tc_off);
tcg_gen_add_ptr(r_ptr, cpu_env, r_tc_off_tl);
tcg_gen_st_tl(cpu_T[0], r_ptr, offsetof(CPUState, LO));
tcg_gen_st_tl(cpu_T[1], r_ptr, offsetof(CPUState, HI));
dead_tmp(r_tc_off);
} }
gen_set_label(l1); gen_set_label(l1);
} }
@ -1912,9 +1931,6 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
TCGv r_tmp1 = new_tmp(); TCGv r_tmp1 = new_tmp();
TCGv r_tmp2 = new_tmp(); TCGv r_tmp2 = new_tmp();
TCGv r_tmp3 = new_tmp(); TCGv r_tmp3 = new_tmp();
TCGv r_tc_off = new_tmp();
TCGv r_tc_off_tl = tcg_temp_new(TCG_TYPE_TL);
TCGv r_ptr = tcg_temp_new(TCG_TYPE_PTR);
tcg_gen_ext_i32_tl(r_tmp1, cpu_T[0]); tcg_gen_ext_i32_tl(r_tmp1, cpu_T[0]);
tcg_gen_ext_i32_tl(r_tmp2, cpu_T[1]); tcg_gen_ext_i32_tl(r_tmp2, cpu_T[1]);
@ -1922,16 +1938,11 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
tcg_gen_remu_i32(r_tmp1, r_tmp1, r_tmp2); tcg_gen_remu_i32(r_tmp1, r_tmp1, r_tmp2);
tcg_gen_trunc_tl_i32(cpu_T[0], r_tmp3); tcg_gen_trunc_tl_i32(cpu_T[0], r_tmp3);
tcg_gen_trunc_tl_i32(cpu_T[1], r_tmp1); tcg_gen_trunc_tl_i32(cpu_T[1], r_tmp1);
gen_store_LO(cpu_T[0], 0);
gen_store_HI(cpu_T[1], 0);
dead_tmp(r_tmp1); dead_tmp(r_tmp1);
dead_tmp(r_tmp2); dead_tmp(r_tmp2);
dead_tmp(r_tmp3); dead_tmp(r_tmp3);
tcg_gen_ld_i32(r_tc_off, cpu_env, offsetof(CPUState, current_tc));
tcg_gen_muli_i32(r_tc_off, r_tc_off, sizeof(target_ulong));
tcg_gen_ext_i32_ptr(r_tc_off_tl, r_tc_off);
tcg_gen_add_ptr(r_ptr, cpu_env, r_tc_off_tl);
tcg_gen_st_tl(cpu_T[0], r_ptr, offsetof(CPUState, LO));
tcg_gen_st_tl(cpu_T[1], r_ptr, offsetof(CPUState, HI));
dead_tmp(r_tc_off);
} }
gen_set_label(l1); gen_set_label(l1);
} }
@ -1952,9 +1963,6 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_T[1], 0, l1); tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_T[1], 0, l1);
{ {
TCGv r_tc_off = new_tmp();
TCGv r_tc_off_tl = tcg_temp_new(TCG_TYPE_TL);
TCGv r_ptr = tcg_temp_new(TCG_TYPE_PTR);
int l2 = gen_new_label(); int l2 = gen_new_label();
int l3 = gen_new_label(); int l3 = gen_new_label();
@ -1968,13 +1976,8 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
tcg_gen_rem_i64(cpu_T[1], cpu_T[0], cpu_T[1]); tcg_gen_rem_i64(cpu_T[1], cpu_T[0], cpu_T[1]);
gen_set_label(l3); gen_set_label(l3);
tcg_gen_ld_i32(r_tc_off, cpu_env, offsetof(CPUState, current_tc)); gen_store_LO(cpu_T[0], 0);
tcg_gen_muli_i32(r_tc_off, r_tc_off, sizeof(target_ulong)); gen_store_HI(cpu_T[1], 0);
tcg_gen_ext_i32_ptr(r_tc_off_tl, r_tc_off);
tcg_gen_add_ptr(r_ptr, cpu_env, r_tc_off_tl);
tcg_gen_st_tl(cpu_T[0], r_ptr, offsetof(CPUState, LO));
tcg_gen_st_tl(cpu_T[1], r_ptr, offsetof(CPUState, HI));
dead_tmp(r_tc_off);
} }
gen_set_label(l1); gen_set_label(l1);
} }
@ -1988,19 +1991,11 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
{ {
TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I64); TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I64);
TCGv r_tmp2 = tcg_temp_new(TCG_TYPE_I64); TCGv r_tmp2 = tcg_temp_new(TCG_TYPE_I64);
TCGv r_tc_off = new_tmp();
TCGv r_tc_off_tl = tcg_temp_new(TCG_TYPE_TL);
TCGv r_ptr = tcg_temp_new(TCG_TYPE_PTR);
tcg_gen_divu_i64(r_tmp1, cpu_T[0], cpu_T[1]); tcg_gen_divu_i64(r_tmp1, cpu_T[0], cpu_T[1]);
tcg_gen_remu_i64(r_tmp2, cpu_T[0], cpu_T[1]); tcg_gen_remu_i64(r_tmp2, cpu_T[0], cpu_T[1]);
tcg_gen_ld_i32(r_tc_off, cpu_env, offsetof(CPUState, current_tc)); gen_store_LO(r_tmp1, 0);
tcg_gen_muli_i32(r_tc_off, r_tc_off, sizeof(target_ulong)); gen_store_HI(r_tmp2, 0);
tcg_gen_ext_i32_ptr(r_tc_off_tl, r_tc_off);
tcg_gen_add_ptr(r_ptr, cpu_env, r_tc_off_tl);
tcg_gen_st_tl(r_tmp1, r_ptr, offsetof(CPUState, LO));
tcg_gen_st_tl(r_tmp2, r_ptr, offsetof(CPUState, HI));
dead_tmp(r_tc_off);
} }
gen_set_label(l1); gen_set_label(l1);
} }
@ -7512,6 +7507,10 @@ static void mips_tcg_init(void)
TCG_AREG0, TCG_AREG0,
offsetof(CPUState, current_tc_gprs), offsetof(CPUState, current_tc_gprs),
"current_tc_gprs"); "current_tc_gprs");
current_tc_hi = tcg_global_mem_new(TCG_TYPE_PTR,
TCG_AREG0,
offsetof(CPUState, current_tc_hi),
"current_tc_hi");
#if TARGET_LONG_BITS > HOST_LONG_BITS #if TARGET_LONG_BITS > HOST_LONG_BITS
cpu_T[0] = tcg_global_mem_new(TCG_TYPE_TL, cpu_T[0] = tcg_global_mem_new(TCG_TYPE_TL,
TCG_AREG0, offsetof(CPUState, t0), "T0"); TCG_AREG0, offsetof(CPUState, t0), "T0");

1
target-mips/translate_init.c
View File

@ -547,6 +547,7 @@ static int cpu_mips_register (CPUMIPSState *env, const mips_def_t *def)
env->CP0_SRSCtl = def->CP0_SRSCtl; env->CP0_SRSCtl = def->CP0_SRSCtl;
env->current_tc = 0; env->current_tc = 0;
env->current_tc_gprs = &env->gpr[env->current_tc][0]; env->current_tc_gprs = &env->gpr[env->current_tc][0];
env->current_tc_hi = &env->HI[env->current_tc][0];
env->SEGBITS = def->SEGBITS; env->SEGBITS = def->SEGBITS;
env->SEGMask = (target_ulong)((1ULL << def->SEGBITS) - 1); env->SEGMask = (target_ulong)((1ULL << def->SEGBITS) - 1);
#if defined(TARGET_MIPS64) #if defined(TARGET_MIPS64)