diff mbox series

[v2,32/35] target/alpha: Use TCG_COND_TST{EQ,NE} for BLB{C,S}

Message ID 20231028194522.245170-33-richard.henderson@linaro.org
State New
Headers show
Series tcg: Introduce TCG_COND_TST{EQ,NE} | expand

Commit Message

Richard Henderson Oct. 28, 2023, 7:45 p.m. UTC 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/alpha/translate.c | 39 ++++++++++++++++-----------------------
 1 file changed, 16 insertions(+), 23 deletions(-)

Comments

Philippe Mathieu-Daudé Nov. 8, 2023, 8:56 p.m. UTC | #1 
On 28/10/23 21:45, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/alpha/translate.c | 39 ++++++++++++++++-----------------------
>   1 file changed, 16 insertions(+), 23 deletions(-)

Preferably split:
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff mbox series

Patch

diff --git a/target/alpha/translate.c b/target/alpha/translate.c
index 32333081d8..49e6a7b62d 100644
--- a/target/alpha/translate.c
+++ b/target/alpha/translate.c
@@ -453,13 +453,13 @@  static DisasJumpType gen_bdirect(DisasContext *ctx, int ra, int32_t disp)
 }
 
 static DisasJumpType gen_bcond_internal(DisasContext *ctx, TCGCond cond,
-                                        TCGv cmp, int32_t disp)
+                                        TCGv cmp, uint64_t imm, int32_t disp)
 {
     uint64_t dest = ctx->base.pc_next + (disp << 2);
     TCGLabel *lab_true = gen_new_label();
 
     if (use_goto_tb(ctx, dest)) {
-        tcg_gen_brcondi_i64(cond, cmp, 0, lab_true);
+        tcg_gen_brcondi_i64(cond, cmp, imm, lab_true);
 
         tcg_gen_goto_tb(0);
         tcg_gen_movi_i64(cpu_pc, ctx->base.pc_next);
@@ -472,27 +472,20 @@  static DisasJumpType gen_bcond_internal(DisasContext *ctx, TCGCond cond,
 
         return DISAS_NORETURN;
     } else {
-        TCGv_i64 z = load_zero(ctx);
+        TCGv_i64 i = tcg_constant_i64(imm);
         TCGv_i64 d = tcg_constant_i64(dest);
         TCGv_i64 p = tcg_constant_i64(ctx->base.pc_next);
 
-        tcg_gen_movcond_i64(cond, cpu_pc, cmp, z, d, p);
+        tcg_gen_movcond_i64(cond, cpu_pc, cmp, i, d, p);
         return DISAS_PC_UPDATED;
     }
 }
 
 static DisasJumpType gen_bcond(DisasContext *ctx, TCGCond cond, int ra,
-                               int32_t disp, int mask)
+                               int32_t disp)
 {
-    if (mask) {
-        TCGv tmp = tcg_temp_new();
-        DisasJumpType ret;
-
-        tcg_gen_andi_i64(tmp, load_gpr(ctx, ra), 1);
-        ret = gen_bcond_internal(ctx, cond, tmp, disp);
-        return ret;
-    }
-    return gen_bcond_internal(ctx, cond, load_gpr(ctx, ra), disp);
+    return gen_bcond_internal(ctx, cond, load_gpr(ctx, ra),
+                              is_tst_cond(cond), disp);
 }
 
 /* Fold -0.0 for comparison with COND.  */
@@ -533,7 +526,7 @@  static DisasJumpType gen_fbcond(DisasContext *ctx, TCGCond cond, int ra,
     DisasJumpType ret;
 
     gen_fold_mzero(cond, cmp_tmp, load_fpr(ctx, ra));
-    ret = gen_bcond_internal(ctx, cond, cmp_tmp, disp);
+    ret = gen_bcond_internal(ctx, cond, cmp_tmp, 0, disp);
     return ret;
 }
 
@@ -2827,35 +2820,35 @@  static DisasJumpType translate_one(DisasContext *ctx, uint32_t insn)
         break;
     case 0x38:
         /* BLBC */
-        ret = gen_bcond(ctx, TCG_COND_EQ, ra, disp21, 1);
+        ret = gen_bcond(ctx, TCG_COND_TSTEQ, ra, disp21);
         break;
     case 0x39:
         /* BEQ */
-        ret = gen_bcond(ctx, TCG_COND_EQ, ra, disp21, 0);
+        ret = gen_bcond(ctx, TCG_COND_EQ, ra, disp21);
         break;
     case 0x3A:
         /* BLT */
-        ret = gen_bcond(ctx, TCG_COND_LT, ra, disp21, 0);
+        ret = gen_bcond(ctx, TCG_COND_LT, ra, disp21);
         break;
     case 0x3B:
         /* BLE */
-        ret = gen_bcond(ctx, TCG_COND_LE, ra, disp21, 0);
+        ret = gen_bcond(ctx, TCG_COND_LE, ra, disp21);
         break;
     case 0x3C:
         /* BLBS */
-        ret = gen_bcond(ctx, TCG_COND_NE, ra, disp21, 1);
+        ret = gen_bcond(ctx, TCG_COND_TSTNE, ra, disp21);
         break;
     case 0x3D:
         /* BNE */
-        ret = gen_bcond(ctx, TCG_COND_NE, ra, disp21, 0);
+        ret = gen_bcond(ctx, TCG_COND_NE, ra, disp21);
         break;
     case 0x3E:
         /* BGE */
-        ret = gen_bcond(ctx, TCG_COND_GE, ra, disp21, 0);
+        ret = gen_bcond(ctx, TCG_COND_GE, ra, disp21);
         break;
     case 0x3F:
         /* BGT */
-        ret = gen_bcond(ctx, TCG_COND_GT, ra, disp21, 0);
+        ret = gen_bcond(ctx, TCG_COND_GT, ra, disp21);
         break;
     invalid_opc:
         ret = gen_invalid(ctx);