target-mips: gen_compute_branch1()

Optimize code generation in gen_compute_branch1():
- Directly use I32 variables instead of converting values from _tl to
  _i32 and back to _tl.
- Write the result directly to bcond instead of passing by a local
  variable.
- Temp variables are valid up to and *including* the brcond instruction.
  Use them instead of temp local variables.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5684 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/target-mips/translate.c b/target-mips/translate.c
index 0ce7f5fb71aea698a847776d3745e28702e21aff..386e0e37d1fe8b22bfe908cb68f5e77b8bd869af 100644 (file)
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -5634,8 +5634,7 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
 {
     target_ulong btarget;
     const char *opn = "cp1 cond branch";
-    TCGv t0 = tcg_temp_local_new(TCG_TYPE_TL);
-    TCGv t1 = tcg_temp_local_new(TCG_TYPE_TL);
+    TCGv t0 = tcg_temp_new(TCG_TYPE_TL);
 
     if (cc != 0)
         check_insn(env, ctx, ISA_MIPS4 | ISA_MIPS32);
@@ -5647,19 +5646,14 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
         {
             int l1 = gen_new_label();
             int l2 = gen_new_label();
-            TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I32);
 
-            get_fp_cond(r_tmp1);
-            tcg_gen_ext_i32_tl(t0, r_tmp1);
-            tcg_temp_free(r_tmp1);
-            tcg_gen_not_tl(t0, t0);
-            tcg_gen_movi_tl(t1, 0x1 << cc);
-            tcg_gen_and_tl(t0, t0, t1);
-            tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0, l1);
-            tcg_gen_movi_tl(t0, 0);
+            get_fp_cond(t0);
+            tcg_gen_andi_i32(t0, t0, 0x1 << cc);
+            tcg_gen_brcondi_i32(TCG_COND_EQ, t0, 0, l1);
+            tcg_gen_movi_i32(bcond, 0);
             tcg_gen_br(l2);
             gen_set_label(l1);
-            tcg_gen_movi_tl(t0, 1);
+            tcg_gen_movi_i32(bcond, 1);
             gen_set_label(l2);
         }
         opn = "bc1f";
@@ -5668,19 +5662,14 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
         {
             int l1 = gen_new_label();
             int l2 = gen_new_label();
-            TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I32);
 
-            get_fp_cond(r_tmp1);
-            tcg_gen_ext_i32_tl(t0, r_tmp1);
-            tcg_temp_free(r_tmp1);
-            tcg_gen_not_tl(t0, t0);
-            tcg_gen_movi_tl(t1, 0x1 << cc);
-            tcg_gen_and_tl(t0, t0, t1);
-            tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0, l1);
-            tcg_gen_movi_tl(t0, 0);
+            get_fp_cond(t0);
+            tcg_gen_andi_i32(t0, t0, 0x1 << cc);
+            tcg_gen_brcondi_i32(TCG_COND_EQ, t0, 0, l1);
+            tcg_gen_movi_i32(bcond, 0);
             tcg_gen_br(l2);
             gen_set_label(l1);
-            tcg_gen_movi_tl(t0, 1);
+            tcg_gen_movi_i32(bcond, 1);
             gen_set_label(l2);
         }
         opn = "bc1fl";
@@ -5689,18 +5678,14 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
         {
             int l1 = gen_new_label();
             int l2 = gen_new_label();
-            TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I32);
 
-            get_fp_cond(r_tmp1);
-            tcg_gen_ext_i32_tl(t0, r_tmp1);
-            tcg_temp_free(r_tmp1);
-            tcg_gen_movi_tl(t1, 0x1 << cc);
-            tcg_gen_and_tl(t0, t0, t1);
-            tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0, l1);
-            tcg_gen_movi_tl(t0, 0);
+            get_fp_cond(t0);
+            tcg_gen_andi_i32(t0, t0, 0x1 << cc);
+            tcg_gen_brcondi_i32(TCG_COND_NE, t0, 0, l1);
+            tcg_gen_movi_i32(bcond, 0);
             tcg_gen_br(l2);
             gen_set_label(l1);
-            tcg_gen_movi_tl(t0, 1);
+            tcg_gen_movi_i32(bcond, 1);
             gen_set_label(l2);
         }
         opn = "bc1t";
@@ -5709,42 +5694,32 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
         {
             int l1 = gen_new_label();
             int l2 = gen_new_label();
-            TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I32);
 
-            get_fp_cond(r_tmp1);
-            tcg_gen_ext_i32_tl(t0, r_tmp1);
-            tcg_temp_free(r_tmp1);
-            tcg_gen_movi_tl(t1, 0x1 << cc);
-            tcg_gen_and_tl(t0, t0, t1);
-            tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0, l1);
-            tcg_gen_movi_tl(t0, 0);
+            get_fp_cond(t0);
+            tcg_gen_andi_i32(t0, t0, 0x1 << cc);
+            tcg_gen_brcondi_i32(TCG_COND_NE, t0, 0, l1);
+            tcg_gen_movi_i32(bcond, 0);
             tcg_gen_br(l2);
             gen_set_label(l1);
-            tcg_gen_movi_tl(t0, 1);
+            tcg_gen_movi_i32(bcond, 1);
             gen_set_label(l2);
         }
         opn = "bc1tl";
     likely:
         ctx->hflags |= MIPS_HFLAG_BL;
-        tcg_gen_trunc_tl_i32(bcond, t0);
         break;
     case OPC_BC1FANY2:
         {
             int l1 = gen_new_label();
             int l2 = gen_new_label();
-            TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I32);
 
-            get_fp_cond(r_tmp1);
-            tcg_gen_ext_i32_tl(t0, r_tmp1);
-            tcg_temp_free(r_tmp1);
-            tcg_gen_not_tl(t0, t0);
-            tcg_gen_movi_tl(t1, 0x3 << cc);
-            tcg_gen_and_tl(t0, t0, t1);
-            tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0, l1);
-            tcg_gen_movi_tl(t0, 0);
+            get_fp_cond(t0);
+            tcg_gen_andi_i32(t0, t0, 0x3 << cc);
+            tcg_gen_brcondi_i32(TCG_COND_EQ, t0, 0, l1);
+            tcg_gen_movi_i32(bcond, 0);
             tcg_gen_br(l2);
             gen_set_label(l1);
-            tcg_gen_movi_tl(t0, 1);
+            tcg_gen_movi_i32(bcond, 1);
             gen_set_label(l2);
         }
         opn = "bc1any2f";
@@ -5753,18 +5728,14 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
         {
             int l1 = gen_new_label();
             int l2 = gen_new_label();
-            TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I32);
 
-            get_fp_cond(r_tmp1);
-            tcg_gen_ext_i32_tl(t0, r_tmp1);
-            tcg_temp_free(r_tmp1);
-            tcg_gen_movi_tl(t1, 0x3 << cc);
-            tcg_gen_and_tl(t0, t0, t1);
-            tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0, l1);
-            tcg_gen_movi_tl(t0, 0);
+            get_fp_cond(t0);
+            tcg_gen_andi_i32(t0, t0, 0x3 << cc);
+            tcg_gen_brcondi_i32(TCG_COND_NE, t0, 0, l1);
+            tcg_gen_movi_i32(bcond, 0);
             tcg_gen_br(l2);
             gen_set_label(l1);
-            tcg_gen_movi_tl(t0, 1);
+            tcg_gen_movi_i32(bcond, 1);
             gen_set_label(l2);
         }
         opn = "bc1any2t";
@@ -5773,19 +5744,14 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
         {
             int l1 = gen_new_label();
             int l2 = gen_new_label();
-            TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I32);
 
-            get_fp_cond(r_tmp1);
-            tcg_gen_ext_i32_tl(t0, r_tmp1);
-            tcg_temp_free(r_tmp1);
-            tcg_gen_not_tl(t0, t0);
-            tcg_gen_movi_tl(t1, 0xf << cc);
-            tcg_gen_and_tl(t0, t0, t1);
-            tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0, l1);
-            tcg_gen_movi_tl(t0, 0);
+            get_fp_cond(t0);
+            tcg_gen_andi_i32(t0, t0, 0xf << cc);
+            tcg_gen_brcondi_i32(TCG_COND_EQ, t0, 0, l1);
+            tcg_gen_movi_i32(bcond, 0);
             tcg_gen_br(l2);
             gen_set_label(l1);
-            tcg_gen_movi_tl(t0, 1);
+            tcg_gen_movi_i32(bcond, 1);
             gen_set_label(l2);
         }
         opn = "bc1any4f";
@@ -5794,24 +5760,19 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
         {
             int l1 = gen_new_label();
             int l2 = gen_new_label();
-            TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I32);
 
-            get_fp_cond(r_tmp1);
-            tcg_gen_ext_i32_tl(t0, r_tmp1);
-            tcg_temp_free(r_tmp1);
-            tcg_gen_movi_tl(t1, 0xf << cc);
-            tcg_gen_and_tl(t0, t0, t1);
-            tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0, l1);
-            tcg_gen_movi_tl(t0, 0);
+            get_fp_cond(t0);
+            tcg_gen_andi_i32(t0, t0, 0xf << cc);
+            tcg_gen_brcondi_i32(TCG_COND_NE, t0, 0, l1);
+            tcg_gen_movi_i32(bcond, 0);
             tcg_gen_br(l2);
             gen_set_label(l1);
-            tcg_gen_movi_tl(t0, 1);
+            tcg_gen_movi_i32(bcond, 1);
             gen_set_label(l2);
         }
         opn = "bc1any4t";
     not_likely:
         ctx->hflags |= MIPS_HFLAG_BC;
-        tcg_gen_trunc_tl_i32(bcond, t0);
         break;
     default:
         MIPS_INVAL(opn);
@@ -5824,7 +5785,6 @@ static void gen_compute_branch1 (CPUState *env, DisasContext *ctx, uint32_t op,
 
  out:
     tcg_temp_free(t0);
-    tcg_temp_free(t1);
 }
 
 /* Coprocessor 1 (FPU) */