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target-i386: Implement MULX

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Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2013-01-23 18:06:18 -08:00
parent 02ea1e6b4f
commit 5f1f4b1771
3 changed files with 47 additions and 0 deletions
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39
target-i386/translate.c
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@ -4099,6 +4099,45 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
set_cc_op(s, CC_OP_BMILGB + ot);
break;
case 0x3f6: /* mulx By, Gy, rdx, 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);
switch (ot) {
TCGv_i64 t0, t1;
default:
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
#ifdef TARGET_X86_64
tcg_gen_ext32u_i64(t0, cpu_T[0]);
tcg_gen_ext32u_i64(t1, cpu_regs[R_EDX]);
#else
tcg_gen_extu_i32_i64(t0, cpu_T[0]);
tcg_gen_extu_i32_i64(t0, cpu_regs[R_EDX]);
#endif
tcg_gen_mul_i64(t0, t0, t1);
tcg_gen_trunc_i64_tl(cpu_T[0], t0);
tcg_gen_shri_i64(t0, t0, 32);
tcg_gen_trunc_i64_tl(cpu_T[1], t0);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
gen_op_mov_reg_T0(OT_LONG, s->vex_v);
gen_op_mov_reg_T1(OT_LONG, reg);
break;
#ifdef TARGET_X86_64
case OT_QUAD:
tcg_gen_mov_tl(cpu_T[1], cpu_regs[R_EDX]);
tcg_gen_mul_tl(cpu_regs[s->vex_v], cpu_T[0], cpu_T[1]);
gen_helper_umulh(cpu_regs[reg], cpu_T[0], cpu_T[1]);
break;
#endif
}
break;
case 0x0f3:
case 0x1f3:
case 0x2f3: