From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: [PATCH 2/8] KVM: x86 emulator: convert shift/rotate instructions to fastop Date: Sat, 12 Jan 2013 16:32:51 +0200 Message-ID: <1358001177-8952-3-git-send-email-avi.kivity@gmail.com> References: <1358001177-8952-1-git-send-email-avi.kivity@gmail.com> Cc: kvm@vger.kernel.org To: Gleb Natapov , Marcelo Tosatti Return-path: Received: from mail-we0-f176.google.com ([74.125.82.176]:40090 "EHLO mail-we0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753608Ab3ALOdG (ORCPT ); Sat, 12 Jan 2013 09:33:06 -0500 Received: by mail-we0-f176.google.com with SMTP id r5so1281432wey.7 for ; Sat, 12 Jan 2013 06:33:05 -0800 (PST) In-Reply-To: <1358001177-8952-1-git-send-email-avi.kivity@gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: SHL, SHR, ROL, ROR, RCL, RCR, SAR, SAL Signed-off-by: Avi Kivity --- arch/x86/kvm/emulate.c | 72 ++++++++++++++++++++++---------------------------- 1 file changed, 31 insertions(+), 41 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 2189c6a..d641178 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -478,6 +478,15 @@ static void invalidate_registers(struct x86_emulate_ctxt *ctxt) ON64(FOP2E(op##q, rax, rbx)) \ FOP_END +/* 2 operand, src is CL */ +#define FASTOP2CL(op) \ + FOP_START(op) \ + FOP2E(op##b, al, cl) \ + FOP2E(op##w, ax, cl) \ + FOP2E(op##l, eax, cl) \ + ON64(FOP2E(op##q, rax, cl)) \ + FOP_END + #define FOP3E(op, dst, src, src2) \ FOP_ALIGN #op " %" #src2 ", %" #src ", %" #dst " \n\t" FOP_RET @@ -2046,38 +2055,17 @@ static int em_jmp_far(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } -static int em_grp2(struct x86_emulate_ctxt *ctxt) -{ - switch (ctxt->modrm_reg) { - case 0: /* rol */ - emulate_2op_SrcB(ctxt, "rol"); - break; - case 1: /* ror */ - emulate_2op_SrcB(ctxt, "ror"); - break; - case 2: /* rcl */ - emulate_2op_SrcB(ctxt, "rcl"); - break; - case 3: /* rcr */ - emulate_2op_SrcB(ctxt, "rcr"); - break; - case 4: /* sal/shl */ - case 6: /* sal/shl */ - emulate_2op_SrcB(ctxt, "sal"); - break; - case 5: /* shr */ - emulate_2op_SrcB(ctxt, "shr"); - break; - case 7: /* sar */ - emulate_2op_SrcB(ctxt, "sar"); - break; - } - return X86EMUL_CONTINUE; -} - FASTOP1(not); FASTOP1(neg); +FASTOP2CL(rol); +FASTOP2CL(ror); +FASTOP2CL(rcl); +FASTOP2CL(rcr); +FASTOP2CL(shl); +FASTOP2CL(shr); +FASTOP2CL(sar); + static int em_mul_ex(struct x86_emulate_ctxt *ctxt) { u8 ex = 0; @@ -3726,6 +3714,17 @@ static const struct opcode group1A[] = { I(DstMem | SrcNone | Mov | Stack, em_pop), N, N, N, N, N, N, N, }; +static const struct opcode group2[] = { + F(DstMem | ModRM, em_rol), + F(DstMem | ModRM, em_ror), + F(DstMem | ModRM, em_rcl), + F(DstMem | ModRM, em_rcr), + F(DstMem | ModRM, em_shl), + F(DstMem | ModRM, em_shr), + F(DstMem | ModRM, em_shl), + F(DstMem | ModRM, em_sar), +}; + static const struct opcode group3[] = { F(DstMem | SrcImm | NoWrite, em_test), F(DstMem | SrcImm | NoWrite, em_test), @@ -3949,7 +3948,7 @@ static const struct opcode opcode_table[256] = { /* 0xB8 - 0xBF */ X8(I(DstReg | SrcImm64 | Mov, em_mov)), /* 0xC0 - 0xC7 */ - D2bv(DstMem | SrcImmByte | ModRM), + G(ByteOp | Src2ImmByte, group2), G(Src2ImmByte, group2), I(ImplicitOps | Stack | SrcImmU16, em_ret_near_imm), I(ImplicitOps | Stack, em_ret), I(DstReg | SrcMemFAddr | ModRM | No64 | Src2ES, em_lseg), @@ -3961,7 +3960,8 @@ static const struct opcode opcode_table[256] = { D(ImplicitOps), DI(SrcImmByte, intn), D(ImplicitOps | No64), II(ImplicitOps, em_iret, iret), /* 0xD0 - 0xD7 */ - D2bv(DstMem | SrcOne | ModRM), D2bv(DstMem | ModRM), + G(Src2One | ByteOp, group2), G(Src2One, group2), + G(Src2CL | ByteOp, group2), G(Src2CL, group2), N, I(DstAcc | SrcImmByte | No64, em_aad), N, N, /* 0xD8 - 0xDF */ N, E(0, &escape_d9), N, E(0, &escape_db), N, E(0, &escape_dd), N, N, @@ -4713,9 +4713,6 @@ special_insn: case 8: ctxt->dst.val = (s32)ctxt->dst.val; break; } break; - case 0xc0 ... 0xc1: - rc = em_grp2(ctxt); - break; case 0xcc: /* int3 */ rc = emulate_int(ctxt, 3); break; @@ -4726,13 +4723,6 @@ special_insn: if (ctxt->eflags & EFLG_OF) rc = emulate_int(ctxt, 4); break; - case 0xd0 ... 0xd1: /* Grp2 */ - rc = em_grp2(ctxt); - break; - case 0xd2 ... 0xd3: /* Grp2 */ - ctxt->src.val = reg_read(ctxt, VCPU_REGS_RCX); - rc = em_grp2(ctxt); - break; case 0xe9: /* jmp rel */ case 0xeb: /* jmp rel short */ jmp_rel(ctxt, ctxt->src.val); -- 1.8.0.1