[PATCH 2/4] target/arm: Use tcg_constant_i64() in do_sat_addsub_64()

[Philippe Mathieu-Daudé]

The immediate value used for comparison is constant and
read-only. Move it to the constant pool. This frees a
TCG temporary for unsigned saturation opcodes.

Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
 target/arm/translate-sve.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index bc91a641711..76b5fe9f313 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -1943,20 +1943,20 @@ static void do_sat_addsub_32(TCGv_i64 reg, TCGv_i64 
val, bool u, bool d)
 static void do_sat_addsub_64(TCGv_i64 reg, TCGv_i64 val, bool u, bool d)
 {
     TCGv_i64 t0 = tcg_temp_new_i64();
-    TCGv_i64 t1 = tcg_temp_new_i64();
     TCGv_i64 t2;
 
     if (u) {
         if (d) {
             tcg_gen_sub_i64(t0, reg, val);
-            tcg_gen_movi_i64(t1, 0);
-            tcg_gen_movcond_i64(TCG_COND_LTU, reg, reg, val, t1, t0);
+            t2 = tcg_constant_i64(0);
+            tcg_gen_movcond_i64(TCG_COND_LTU, reg, reg, val, t2, t0);
         } else {
             tcg_gen_add_i64(t0, reg, val);
-            tcg_gen_movi_i64(t1, -1);
-            tcg_gen_movcond_i64(TCG_COND_LTU, reg, t0, reg, t1, t0);
+            t2 = tcg_constant_i64(-1);
+            tcg_gen_movcond_i64(TCG_COND_LTU, reg, t0, reg, t2, t0);
         }
     } else {
+        TCGv_i64 t1 = tcg_temp_new_i64();
         if (d) {
             /* Detect signed overflow for subtraction.  */
             tcg_gen_xor_i64(t0, reg, val);
@@ -1966,7 +1966,7 @@ static void do_sat_addsub_64(TCGv_i64 reg, TCGv_i64 val, 
bool u, bool d)
 
             /* Bound the result.  */
             tcg_gen_movi_i64(reg, INT64_MIN);
-            t2 = tcg_const_i64(0);
+            t2 = tcg_constant_i64(0);
             tcg_gen_movcond_i64(TCG_COND_LT, reg, t0, t2, reg, t1);
         } else {
             /* Detect signed overflow for addition.  */
@@ -1977,13 +1977,12 @@ static void do_sat_addsub_64(TCGv_i64 reg, TCGv_i64 
val, bool u, bool d)
 
             /* Bound the result.  */
             tcg_gen_movi_i64(t1, INT64_MAX);
-            t2 = tcg_const_i64(0);
+            t2 = tcg_constant_i64(0);
             tcg_gen_movcond_i64(TCG_COND_LT, reg, t0, t2, t1, reg);
         }
-        tcg_temp_free_i64(t2);
+        tcg_temp_free_i64(t1);
     }
     tcg_temp_free_i64(t0);
-    tcg_temp_free_i64(t1);
 }
 
 /* Similarly with a vector and a scalar operand.  */
-- 
2.31.1