target-i386: Implement BNDMOV (62b58ba5) · Commits · SUMMER2020 / students / proj-2021291

target-i386/translate.c

+72 −1

Original line number	Diff line number	Diff line
		@@ -7440,6 +7440,47 @@ static target_ulong disas_insn(CPUX86State env, DisasContext s,
		break;
		}
		break;
		case 0x11a:
		modrm = cpu_ldub_code(env, s->pc++);
		if (s->flags & HF_MPX_EN_MASK) {
		mod = (modrm >> 6) & 3;
		reg = ((modrm >> 3) & 7) \| rex_r;
		if (prefixes & PREFIX_DATA) {
		/* bndmov -- from reg/mem */
		if (reg >= 4 \|\| s->aflag == MO_16) {
		goto illegal_op;
		}
		if (mod == 3) {
		int reg2 = (modrm & 7) \| REX_B(s);
		if (reg2 >= 4 \|\| (prefixes & PREFIX_LOCK)) {
		goto illegal_op;
		}
		if (s->flags & HF_MPX_IU_MASK) {
		tcg_gen_mov_i64(cpu_bndl[reg], cpu_bndl[reg2]);
		tcg_gen_mov_i64(cpu_bndu[reg], cpu_bndu[reg2]);
		}
		} else {
		gen_lea_modrm(env, s, modrm);
		if (CODE64(s)) {
		tcg_gen_qemu_ld_i64(cpu_bndl[reg], cpu_A0,
		s->mem_index, MO_LEQ);
		tcg_gen_addi_tl(cpu_A0, cpu_A0, 8);
		tcg_gen_qemu_ld_i64(cpu_bndu[reg], cpu_A0,
		s->mem_index, MO_LEQ);
		} else {
		tcg_gen_qemu_ld_i64(cpu_bndl[reg], cpu_A0,
		s->mem_index, MO_LEUL);
		tcg_gen_addi_tl(cpu_A0, cpu_A0, 4);
		tcg_gen_qemu_ld_i64(cpu_bndu[reg], cpu_A0,
		s->mem_index, MO_LEUL);
		}
		/* bnd registers are now in-use */
		gen_set_hflag(s, HF_MPX_IU_MASK);
		}
		}
		}
		gen_nop_modrm(env, s, modrm);
		break;
		case 0x11b:
		modrm = cpu_ldub_code(env, s->pc++);
		if (s->flags & HF_MPX_EN_MASK) {
		@@ -7473,11 +7514,41 @@ static target_ulong disas_insn(CPUX86State env, DisasContext s,
		/* bnd registers are now in-use */
		gen_set_hflag(s, HF_MPX_IU_MASK);
		break;
		} else if (prefixes & PREFIX_DATA) {
		/* bndmov -- to reg/mem */
		if (reg >= 4 \|\| s->aflag == MO_16) {
		goto illegal_op;
		}
		if (mod == 3) {
		int reg2 = (modrm & 7) \| REX_B(s);
		if (reg2 >= 4 \|\| (prefixes & PREFIX_LOCK)) {
		goto illegal_op;
		}
		if (s->flags & HF_MPX_IU_MASK) {
		tcg_gen_mov_i64(cpu_bndl[reg2], cpu_bndl[reg]);
		tcg_gen_mov_i64(cpu_bndu[reg2], cpu_bndu[reg]);
		}
		} else {
		gen_lea_modrm(env, s, modrm);
		if (CODE64(s)) {
		tcg_gen_qemu_st_i64(cpu_bndl[reg], cpu_A0,
		s->mem_index, MO_LEQ);
		tcg_gen_addi_tl(cpu_A0, cpu_A0, 8);
		tcg_gen_qemu_st_i64(cpu_bndu[reg], cpu_A0,
		s->mem_index, MO_LEQ);
		} else {
		tcg_gen_qemu_st_i64(cpu_bndl[reg], cpu_A0,
		s->mem_index, MO_LEUL);
		tcg_gen_addi_tl(cpu_A0, cpu_A0, 4);
		tcg_gen_qemu_st_i64(cpu_bndu[reg], cpu_A0,
		s->mem_index, MO_LEUL);
		}
		}
		}
		}
		gen_nop_modrm(env, s, modrm);
		break;
		case 0x119: case 0x11a: case 0x11c ... 0x11f: /* nop (multi byte) */
		case 0x119: case 0x11c ... 0x11f: /* nop (multi byte) */
		modrm = cpu_ldub_code(env, s->pc++);
		gen_nop_modrm(env, s, modrm);
		break;