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target-i386: Implement BNDCL, BNDCU, BNDCN

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Backports commit 523e28d7614571680d21641bd0bd9b9e84570cee from qemu
This commit is contained in:
Richard Henderson 2018-02-20 14:19:03 -05:00 committed by Lioncash
parent c2f92123f4
commit 554c41f05f
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 49 additions and 1 deletions
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2
qemu/target-i386/helper.h
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@ -18,6 +18,8 @@ DEF_HELPER_2(divq_EAX, void, env, tl)
DEF_HELPER_2(idivq_EAX, void, env, tl)
#endif
DEF_HELPER_FLAGS_2(bndck, TCG_CALL_NO_WG, void, env, i32)
DEF_HELPER_2(aam, void, env, int)
DEF_HELPER_2(aad, void, env, int)
DEF_HELPER_1(aaa, void, env)

48
qemu/target-i386/translate.c
View file

@ -2256,6 +2256,25 @@ static void gen_nop_modrm(CPUX86State *env, DisasContext *s, int modrm)
(void)gen_lea_modrm_0(env, s, modrm);
}
/* Used for BNDCL, BNDCU, BNDCN. */
static void gen_bndck(CPUX86State *env, DisasContext *s, int modrm,
TCGCond cond, TCGv_i64 bndv)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
TCGv_i64 cpu_tmp1_i64 = tcg_ctx->cpu_tmp1_i64;
TCGv_i32 cpu_tmp2_i32 = tcg_ctx->cpu_tmp2_i32;
TCGv ea = gen_lea_modrm_1(s, gen_lea_modrm_0(env, s, modrm));
tcg_gen_extu_tl_i64(tcg_ctx, cpu_tmp1_i64, ea);
if (!CODE64(s)) {
tcg_gen_ext32u_i64(tcg_ctx, cpu_tmp1_i64, cpu_tmp1_i64);
}
tcg_gen_setcond_i64(tcg_ctx, cond, cpu_tmp1_i64, cpu_tmp1_i64, bndv);
tcg_gen_extrl_i64_i32(tcg_ctx, cpu_tmp2_i32, cpu_tmp1_i64);
gen_helper_bndck(tcg_ctx, tcg_ctx->cpu_env, cpu_tmp2_i32);
}
/* used for LEA and MOV AX, mem */
static void gen_add_A0_ds_seg(DisasContext *s)
{
@ -8117,7 +8136,26 @@ case 0x101:
if (s->flags & HF_MPX_EN_MASK) {
mod = (modrm >> 6) & 3;
reg = ((modrm >> 3) & 7) | rex_r;
if (prefixes & PREFIX_DATA) {
if (prefixes & PREFIX_REPZ) {
/* bndcl */
if (reg >= 4
|| (prefixes & PREFIX_LOCK)
|| s->aflag == MO_16) {
goto illegal_op;
}
gen_bndck(env, s, modrm, TCG_COND_LTU, tcg_ctx->cpu_bndl[reg]);
} else if (prefixes & PREFIX_REPNZ) {
/* bndcu */
if (reg >= 4
|| (prefixes & PREFIX_LOCK)
|| s->aflag == MO_16) {
goto illegal_op;
}
TCGv_i64 notu = tcg_temp_new_i64(tcg_ctx);
tcg_gen_not_i64(tcg_ctx, notu, tcg_ctx->cpu_bndu[reg]);
gen_bndck(env, s, modrm, TCG_COND_GTU, notu);
tcg_temp_free_i64(tcg_ctx, notu);
} else if (prefixes & PREFIX_DATA) {
/* bndmov -- from reg/mem */
if (reg >= 4 || s->aflag == MO_16) {
goto illegal_op;
@ -8186,6 +8224,14 @@ case 0x101:
/* bnd registers are now in-use */
gen_set_hflag(s, HF_MPX_IU_MASK);
break;
} else if (prefixes & PREFIX_REPNZ) {
/* bndcn */
if (reg >= 4
|| (prefixes & PREFIX_LOCK)
|| s->aflag == MO_16) {
goto illegal_op;
}
gen_bndck(env, s, modrm, TCG_COND_GTU, tcg_ctx->cpu_bndu[reg]);
} else if (prefixes & PREFIX_DATA) {
/* bndmov -- to reg/mem */
if (reg >= 4 || s->aflag == MO_16) {