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target-mips: optimize gen_cl() 

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6932 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2009-03-29 01:18:16 +00:00
parent af4b6c54c1
commit 20e1fb525a
1 changed files with 11 additions and 15 deletions
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26
target-mips/translate.c
View File

@ -2128,42 +2128,36 @@ static void gen_cl (DisasContext *ctx, uint32_t opc,
int rd, int rs)
{
const char *opn = "CLx";
TCGv t0 = tcg_temp_local_new();
TCGv t0;
if (rd == 0) {
/* Treat as NOP. */
MIPS_DEBUG("NOP");
goto out;
return;
}
t0 = tcg_temp_new();
gen_load_gpr(t0, rs);
switch (opc) {
case OPC_CLO:
gen_helper_clo(t0, t0);
gen_helper_clo(cpu_gpr[rd], t0);
opn = "clo";
break;
case OPC_CLZ:
gen_helper_clz(t0, t0);
gen_helper_clz(cpu_gpr[rd], t0);
opn = "clz";
break;
#if defined(TARGET_MIPS64)
case OPC_DCLO:
gen_helper_dclo(t0, t0);
gen_helper_dclo(cpu_gpr[rd], t0);
opn = "dclo";
break;
case OPC_DCLZ:
gen_helper_dclz(t0, t0);
gen_helper_dclz(cpu_gpr[rd], t0);
opn = "dclz";
break;
#endif
default:
MIPS_INVAL(opn);
generate_exception(ctx, EXCP_RI);
goto out;
}
gen_store_gpr(t0, rd);
MIPS_DEBUG("%s %s, %s", opn, regnames[rd], regnames[rs]);
out:
tcg_temp_free(t0);
}
@ -7711,7 +7705,8 @@ static void decode_opc (CPUState *env, DisasContext *ctx)
case OPC_MUL:
gen_arith(env, ctx, op1, rd, rs, rt);
break;
case OPC_CLZ ... OPC_CLO:
case OPC_CLO:
case OPC_CLZ:
check_insn(env, ctx, ISA_MIPS32);
gen_cl(ctx, op1, rd, rs);
break;
@ -7728,7 +7723,8 @@ static void decode_opc (CPUState *env, DisasContext *ctx)
/* Treat as NOP. */
break;
#if defined(TARGET_MIPS64)
case OPC_DCLZ ... OPC_DCLO:
case OPC_DCLO:
case OPC_DCLZ:
check_insn(env, ctx, ISA_MIPS64);
check_mips_64(ctx);
gen_cl(ctx, op1, rd, rs);