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target-i386: Implement PDEP, PEXT

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Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2013-01-23 18:09:43 -08:00
parent 5f1f4b1771
commit 0592f74a75
3 changed files with 71 additions and 0 deletions
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3
target-i386/helper.h
View File

@ -194,9 +194,12 @@ DEF_HELPER_3(fsave, void, env, tl, int)
DEF_HELPER_3(frstor, void, env, tl, int)
DEF_HELPER_3(fxsave, void, env, tl, int)
DEF_HELPER_3(fxrstor, void, env, tl, int)
DEF_HELPER_1(bsf, tl, tl)
DEF_HELPER_1(bsr, tl, tl)
DEF_HELPER_2(lzcnt, tl, tl, int)
DEF_HELPER_FLAGS_2(pdep, TCG_CALL_NO_RWG_SE, tl, tl, tl)
DEF_HELPER_FLAGS_2(pext, TCG_CALL_NO_RWG_SE, tl, tl, tl)
/* MMX/SSE */

32
target-i386/int_helper.c
View File

@ -488,6 +488,38 @@ target_ulong helper_bsr(target_ulong t0)
return helper_lzcnt(t0, 0);
}
#if TARGET_LONG_BITS == 32
# define ctztl ctz32
#else
# define ctztl ctz64
#endif
target_ulong helper_pdep(target_ulong src, target_ulong mask)
{
target_ulong dest = 0;
int i, o;
for (i = 0; mask != 0; i++) {
o = ctztl(mask);
mask &= mask - 1;
dest |= ((src >> i) & 1) << o;
}
return dest;
}
target_ulong helper_pext(target_ulong src, target_ulong mask)
{
target_ulong dest = 0;
int i, o;
for (o = 0; mask != 0; o++) {
i = ctztl(mask);
mask &= mask - 1;
dest |= ((src >> i) & 1) << o;
}
return dest;
}
#define SHIFT 0
#include "shift_helper_template.h"
#undef SHIFT

36
target-i386/translate.c
View File

@ -4138,6 +4138,42 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
}
break;
case 0x3f5: /* pdep Gy, By, Ey */
if (!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_BMI2)
|| !(s->prefix & PREFIX_VEX)
|| s->vex_l != 0) {
goto illegal_op;
}
ot = s->dflag == 2 ? OT_QUAD : OT_LONG;
gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
/* Note that by zero-extending the mask operand, we
automatically handle zero-extending the result. */
if (s->dflag == 2) {
tcg_gen_mov_tl(cpu_T[1], cpu_regs[s->vex_v]);
} else {
tcg_gen_ext32u_tl(cpu_T[1], cpu_regs[s->vex_v]);
}
gen_helper_pdep(cpu_regs[reg], cpu_T[0], cpu_T[1]);
break;
case 0x2f5: /* pext Gy, By, Ey */
if (!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_BMI2)
|| !(s->prefix & PREFIX_VEX)
|| s->vex_l != 0) {
goto illegal_op;
}
ot = s->dflag == 2 ? OT_QUAD : OT_LONG;
gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
/* Note that by zero-extending the mask operand, we
automatically handle zero-extending the result. */
if (s->dflag == 2) {
tcg_gen_mov_tl(cpu_T[1], cpu_regs[s->vex_v]);
} else {
tcg_gen_ext32u_tl(cpu_T[1], cpu_regs[s->vex_v]);
}
gen_helper_pext(cpu_regs[reg], cpu_T[0], cpu_T[1]);
break;
case 0x0f3:
case 0x1f3:
case 0x2f3: