diff mbox series

[09/16] target/i386: split gen_ldst_modrm for load and store

Message ID 20240524081019.1141359-10-pbonzini@redhat.com (mailing list archive)
State New, archived
Headers show
Series target/i386/tcg: translation cleanups | expand

Commit Message

Paolo Bonzini May 24, 2024, 8:10 a.m. UTC 
The is_store argument of gen_ldst_modrm has only ever been passed
a constant.  Just split the function in two.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/tcg/translate.c | 52 +++++++++++++++++++++----------------
 1 file changed, 29 insertions(+), 23 deletions(-)

Comments

Richard Henderson May 24, 2024, 2:34 p.m. UTC | #1 
On 5/24/24 01:10, Paolo Bonzini wrote:
> The is_store argument of gen_ldst_modrm has only ever been passed
> a constant.  Just split the function in two.
> 
> Signed-off-by: Paolo Bonzini<pbonzini@redhat.com>
> ---
>   target/i386/tcg/translate.c | 52 +++++++++++++++++++++----------------
>   1 file changed, 29 insertions(+), 23 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index b75d61a9141..d32b5b63f5c 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -1821,27 +1821,33 @@  static void gen_add_A0_ds_seg(DisasContext *s)
     gen_lea_v_seg(s, s->aflag, s->A0, R_DS, s->override);
 }
 
-/* generate modrm memory load or store of 'reg'. */
-static void gen_ldst_modrm(CPUX86State *env, DisasContext *s, int modrm,
-                           MemOp ot, int is_store)
+/* generate modrm load of memory or register. */
+static void gen_ld_modrm(CPUX86State *env, DisasContext *s, int modrm, MemOp ot)
 {
     int mod, rm;
 
     mod = (modrm >> 6) & 3;
     rm = (modrm & 7) | REX_B(s);
     if (mod == 3) {
-        if (is_store) {
-            gen_op_mov_reg_v(s, ot, rm, s->T0);
-        } else {
-            gen_op_mov_v_reg(s, ot, s->T0, rm);
-        }
+        gen_op_mov_v_reg(s, ot, s->T0, rm);
     } else {
         gen_lea_modrm(env, s, modrm);
-        if (is_store) {
-            gen_op_st_v(s, ot, s->T0, s->A0);
-        } else {
-            gen_op_ld_v(s, ot, s->T0, s->A0);
-        }
+        gen_op_ld_v(s, ot, s->T0, s->A0);
+    }
+}
+
+/* generate modrm store of memory or register. */
+static void gen_st_modrm(CPUX86State *env, DisasContext *s, int modrm, MemOp ot)
+{
+    int mod, rm;
+
+    mod = (modrm >> 6) & 3;
+    rm = (modrm & 7) | REX_B(s);
+    if (mod == 3) {
+        gen_op_mov_reg_v(s, ot, rm, s->T0);
+    } else {
+        gen_lea_modrm(env, s, modrm);
+        gen_op_st_v(s, ot, s->T0, s->A0);
     }
 }
 
@@ -3431,7 +3437,7 @@  static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
         ot = dflag;
         modrm = x86_ldub_code(env, s);
         reg = ((modrm >> 3) & 7) | REX_R(s);
-        gen_ldst_modrm(env, s, modrm, ot, 0);
+        gen_ld_modrm(env, s, modrm, ot);
         gen_extu(ot, s->T0);
 
         /* Note that lzcnt and tzcnt are in different extensions.  */
@@ -3578,14 +3584,14 @@  static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
             tcg_gen_ld32u_tl(s->T0, tcg_env,
                              offsetof(CPUX86State, ldt.selector));
             ot = mod == 3 ? dflag : MO_16;
-            gen_ldst_modrm(env, s, modrm, ot, 1);
+            gen_st_modrm(env, s, modrm, ot);
             break;
         case 2: /* lldt */
             if (!PE(s) || VM86(s))
                 goto illegal_op;
             if (check_cpl0(s)) {
                 gen_svm_check_intercept(s, SVM_EXIT_LDTR_WRITE);
-                gen_ldst_modrm(env, s, modrm, MO_16, 0);
+                gen_ld_modrm(env, s, modrm, MO_16);
                 tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0);
                 gen_helper_lldt(tcg_env, s->tmp2_i32);
             }
@@ -3600,14 +3606,14 @@  static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
             tcg_gen_ld32u_tl(s->T0, tcg_env,
                              offsetof(CPUX86State, tr.selector));
             ot = mod == 3 ? dflag : MO_16;
-            gen_ldst_modrm(env, s, modrm, ot, 1);
+            gen_st_modrm(env, s, modrm, ot);
             break;
         case 3: /* ltr */
             if (!PE(s) || VM86(s))
                 goto illegal_op;
             if (check_cpl0(s)) {
                 gen_svm_check_intercept(s, SVM_EXIT_TR_WRITE);
-                gen_ldst_modrm(env, s, modrm, MO_16, 0);
+                gen_ld_modrm(env, s, modrm, MO_16);
                 tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0);
                 gen_helper_ltr(tcg_env, s->tmp2_i32);
             }
@@ -3616,7 +3622,7 @@  static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
         case 5: /* verw */
             if (!PE(s) || VM86(s))
                 goto illegal_op;
-            gen_ldst_modrm(env, s, modrm, MO_16, 0);
+            gen_ld_modrm(env, s, modrm, MO_16);
             gen_update_cc_op(s);
             if (op == 4) {
                 gen_helper_verr(tcg_env, s->T0);
@@ -3880,7 +3886,7 @@  static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
              */
             mod = (modrm >> 6) & 3;
             ot = (mod != 3 ? MO_16 : s->dflag);
-            gen_ldst_modrm(env, s, modrm, ot, 1);
+            gen_st_modrm(env, s, modrm, ot);
             break;
         case 0xee: /* rdpkru */
             if (s->prefix & (PREFIX_LOCK | PREFIX_DATA
@@ -3907,7 +3913,7 @@  static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
                 break;
             }
             gen_svm_check_intercept(s, SVM_EXIT_WRITE_CR0);
-            gen_ldst_modrm(env, s, modrm, MO_16, 0);
+            gen_ld_modrm(env, s, modrm, MO_16);
             /*
              * Only the 4 lower bits of CR0 are modified.
              * PE cannot be set to zero if already set to one.
@@ -3979,7 +3985,7 @@  static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
             ot = dflag != MO_16 ? MO_32 : MO_16;
             modrm = x86_ldub_code(env, s);
             reg = ((modrm >> 3) & 7) | REX_R(s);
-            gen_ldst_modrm(env, s, modrm, MO_16, 0);
+            gen_ld_modrm(env, s, modrm, MO_16);
             t0 = tcg_temp_new();
             gen_update_cc_op(s);
             if (b == 0x102) {
@@ -4483,7 +4489,7 @@  static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
         reg = ((modrm >> 3) & 7) | REX_R(s);
 
         ot = dflag;
-        gen_ldst_modrm(env, s, modrm, ot, 0);
+        gen_ld_modrm(env, s, modrm, ot);
         gen_extu(ot, s->T0);
         tcg_gen_mov_tl(cpu_cc_src, s->T0);
         tcg_gen_ctpop_tl(s->T0, s->T0);