From 1bca40fe42a97eac3d5c5a5e772ea3ec9e82cc62 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 14 May 2021 10:13:39 -0500 Subject: target/i386: Pass in port to gen_check_io Pass in a pre-truncated TCGv_i32 value. We were doing the truncation of EDX in multiple places, now only once per insn. While all callers use s->tmp2_i32, for cleanliness of the subroutine, use a parameter anyway. Signed-off-by: Richard Henderson Reviewed-by: Paolo Bonzini Message-Id: <20210514151342.384376-48-richard.henderson@linaro.org> --- target/i386/tcg/translate.c | 55 ++++++++++++++++++++++++--------------------- 1 file changed, 29 insertions(+), 26 deletions(-) diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index 2282c3598c..94193a8e00 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -674,19 +674,23 @@ static void gen_helper_out_func(MemOp ot, TCGv_i32 v, TCGv_i32 n) } } -static bool gen_check_io(DisasContext *s, MemOp ot, uint32_t svm_flags) +/* + * Validate that access to [port, port + 1<tmp2_i32, s->T0); if (PE(s) && (CPL(s) > IOPL(s) || VM86(s))) { switch (ot) { case MO_8: - gen_helper_check_iob(cpu_env, s->tmp2_i32); + gen_helper_check_iob(cpu_env, port); break; case MO_16: - gen_helper_check_iow(cpu_env, s->tmp2_i32); + gen_helper_check_iow(cpu_env, port); break; case MO_32: - gen_helper_check_iol(cpu_env, s->tmp2_i32); + gen_helper_check_iol(cpu_env, port); break; default: tcg_abort(); @@ -702,7 +706,7 @@ static bool gen_check_io(DisasContext *s, MemOp ot, uint32_t svm_flags) svm_flags |= SVM_IOIO_REP_MASK; } svm_flags |= 1 << (SVM_IOIO_SIZE_SHIFT + ot); - gen_helper_svm_check_io(cpu_env, s->tmp2_i32, + gen_helper_svm_check_io(cpu_env, port, tcg_constant_i32(svm_flags), tcg_constant_i32(next_eip - cur_eip)); } @@ -6479,8 +6483,10 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu) case 0x6c: /* insS */ case 0x6d: ot = mo_b_d32(b, dflag); - tcg_gen_ext16u_tl(s->T0, cpu_regs[R_EDX]); - if (!gen_check_io(s, ot, SVM_IOIO_TYPE_MASK | SVM_IOIO_STR_MASK)) { + tcg_gen_trunc_tl_i32(s->tmp2_i32, cpu_regs[R_EDX]); + tcg_gen_ext16u_i32(s->tmp2_i32, s->tmp2_i32); + if (!gen_check_io(s, ot, s->tmp2_i32, + SVM_IOIO_TYPE_MASK | SVM_IOIO_STR_MASK)) { break; } if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) { @@ -6499,8 +6505,9 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu) case 0x6e: /* outsS */ case 0x6f: ot = mo_b_d32(b, dflag); - tcg_gen_ext16u_tl(s->T0, cpu_regs[R_EDX]); - if (!gen_check_io(s, ot, SVM_IOIO_STR_MASK)) { + tcg_gen_trunc_tl_i32(s->tmp2_i32, cpu_regs[R_EDX]); + tcg_gen_ext16u_i32(s->tmp2_i32, s->tmp2_i32); + if (!gen_check_io(s, ot, s->tmp2_i32, SVM_IOIO_STR_MASK)) { break; } if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) { @@ -6524,14 +6531,13 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu) case 0xe5: ot = mo_b_d32(b, dflag); val = x86_ldub_code(env, s); - tcg_gen_movi_tl(s->T0, val); - if (!gen_check_io(s, ot, SVM_IOIO_TYPE_MASK)) { + tcg_gen_movi_i32(s->tmp2_i32, val); + if (!gen_check_io(s, ot, s->tmp2_i32, SVM_IOIO_TYPE_MASK)) { break; } if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) { gen_io_start(); } - tcg_gen_movi_i32(s->tmp2_i32, val); gen_helper_in_func(ot, s->T1, s->tmp2_i32); gen_op_mov_reg_v(s, ot, R_EAX, s->T1); gen_bpt_io(s, s->tmp2_i32, ot); @@ -6543,16 +6549,14 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu) case 0xe7: ot = mo_b_d32(b, dflag); val = x86_ldub_code(env, s); - tcg_gen_movi_tl(s->T0, val); - if (!gen_check_io(s, ot, 0)) { + tcg_gen_movi_i32(s->tmp2_i32, val); + if (!gen_check_io(s, ot, s->tmp2_i32, 0)) { break; } - gen_op_mov_v_reg(s, ot, s->T1, R_EAX); - if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) { gen_io_start(); } - tcg_gen_movi_i32(s->tmp2_i32, val); + gen_op_mov_v_reg(s, ot, s->T1, R_EAX); tcg_gen_trunc_tl_i32(s->tmp3_i32, s->T1); gen_helper_out_func(ot, s->tmp2_i32, s->tmp3_i32); gen_bpt_io(s, s->tmp2_i32, ot); @@ -6563,14 +6567,14 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu) case 0xec: case 0xed: ot = mo_b_d32(b, dflag); - tcg_gen_ext16u_tl(s->T0, cpu_regs[R_EDX]); - if (!gen_check_io(s, ot, SVM_IOIO_TYPE_MASK)) { + tcg_gen_trunc_tl_i32(s->tmp2_i32, cpu_regs[R_EDX]); + tcg_gen_ext16u_i32(s->tmp2_i32, s->tmp2_i32); + if (!gen_check_io(s, ot, s->tmp2_i32, SVM_IOIO_TYPE_MASK)) { break; } if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) { gen_io_start(); } - tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0); gen_helper_in_func(ot, s->T1, s->tmp2_i32); gen_op_mov_reg_v(s, ot, R_EAX, s->T1); gen_bpt_io(s, s->tmp2_i32, ot); @@ -6581,16 +6585,15 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu) case 0xee: case 0xef: ot = mo_b_d32(b, dflag); - tcg_gen_ext16u_tl(s->T0, cpu_regs[R_EDX]); - if (!gen_check_io(s, ot, 0)) { + tcg_gen_trunc_tl_i32(s->tmp2_i32, cpu_regs[R_EDX]); + tcg_gen_ext16u_i32(s->tmp2_i32, s->tmp2_i32); + if (!gen_check_io(s, ot, s->tmp2_i32, 0)) { break; } - gen_op_mov_v_reg(s, ot, s->T1, R_EAX); - if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) { gen_io_start(); } - tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0); + gen_op_mov_v_reg(s, ot, s->T1, R_EAX); tcg_gen_trunc_tl_i32(s->tmp3_i32, s->T1); gen_helper_out_func(ot, s->tmp2_i32, s->tmp3_i32); gen_bpt_io(s, s->tmp2_i32, ot); -- cgit v1.2.3