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| author | Richard Henderson <rth@twiddle.net> | 2013-01-23 16:21:33 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-02-18 15:39:39 -0800 |
| commit | c7ab7565bc6d52cc140230aa4d0533d13d89c8b1 (patch) | |
| tree | 1f8349910fd2c116819afda1dc115b75faf6bfa0 /target-i386 | |
| parent | 7073fbada733c8d10992f00772c9b9299d740e9b (diff) | |
| download | qemu-c7ab7565bc6d52cc140230aa4d0533d13d89c8b1.tar.gz | |
target-i386: Implement BEXTR
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/translate.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c index 01ff13154d..d742fe3693 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -4026,6 +4026,46 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b, set_cc_op(s, CC_OP_LOGICB + ot); break; + case 0x0f7: /* bextr Gy, Ey, By */ + if (!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_BMI1) + || !(s->prefix & PREFIX_VEX) + || s->vex_l != 0) { + goto illegal_op; + } + ot = s->dflag == 2 ? OT_QUAD : OT_LONG; + { + TCGv bound, zero; + + gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0); + /* Extract START, and shift the operand. + Shifts larger than operand size get zeros. */ + tcg_gen_ext8u_tl(cpu_A0, cpu_regs[s->vex_v]); + tcg_gen_shr_tl(cpu_T[0], cpu_T[0], cpu_A0); + + bound = tcg_const_tl(ot == OT_QUAD ? 63 : 31); + zero = tcg_const_tl(0); + tcg_gen_movcond_tl(TCG_COND_LEU, cpu_T[0], cpu_A0, bound, + cpu_T[0], zero); + tcg_temp_free(zero); + + /* Extract the LEN into a mask. Lengths larger than + operand size get all ones. */ + tcg_gen_shri_tl(cpu_A0, cpu_regs[s->vex_v], 8); + tcg_gen_ext8u_tl(cpu_A0, cpu_A0); + tcg_gen_movcond_tl(TCG_COND_LEU, cpu_A0, cpu_A0, bound, + cpu_A0, bound); + tcg_temp_free(bound); + tcg_gen_movi_tl(cpu_T[1], 1); + tcg_gen_shl_tl(cpu_T[1], cpu_T[1], cpu_A0); + tcg_gen_subi_tl(cpu_T[1], cpu_T[1], 1); + tcg_gen_and_tl(cpu_T[0], cpu_T[0], cpu_T[1]); + + gen_op_mov_reg_T0(ot, reg); + gen_op_update1_cc(); + set_cc_op(s, CC_OP_LOGICB + ot); + } + break; + default: goto illegal_op; } |