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[Qemu-devel] [PATCH 5/6] target/m68k: Optimize rotate_x() using extract_
From: |
Philippe Mathieu-Daudé |
Subject: |
[Qemu-devel] [PATCH 5/6] target/m68k: Optimize rotate_x() using extract_i32() |
Date: |
Sun, 10 Mar 2019 01:34:27 +0100 |
Optimize rotate_x() using tcg_gen_extract_i32(). We can now free the
'sz' tcg_temp earlier. Since it is allocated with tcg_const_i32(),
free it with tcg_temp_free_i32().
Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
target/m68k/translate.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/target/m68k/translate.c b/target/m68k/translate.c
index f43ac07b7f..b51b8a2a12 100644
--- a/target/m68k/translate.c
+++ b/target/m68k/translate.c
@@ -3686,6 +3686,7 @@ static TCGv rotate_x(TCGv reg, TCGv shift, int left, int
size)
tcg_gen_sub_i32(shl, shl, shift); /* shl = size + 1 - shift */
tcg_gen_sub_i32(shx, sz, shift); /* shx = size - shift */
}
+ tcg_temp_free_i32(sz);
/* reg = (reg << shl) | (reg >> shr) | (x << shx); */
@@ -3701,9 +3702,7 @@ static TCGv rotate_x(TCGv reg, TCGv shift, int left, int
size)
/* X = (reg >> size) & 1 */
X = tcg_temp_new();
- tcg_gen_shr_i32(X, reg, sz);
- tcg_gen_andi_i32(X, X, 1);
- tcg_temp_free(sz);
+ tcg_gen_extract_i32(X, reg, size, 1);
return X;
}
--
2.19.1
- [Qemu-devel] [PATCH 1/6] target/m68k: Reduce the l1 TCGLabel scope, (continued)
- [Qemu-devel] [PATCH 1/6] target/m68k: Reduce the l1 TCGLabel scope, Philippe Mathieu-Daudé, 2019/03/09
- [Qemu-devel] [PATCH 2/6] target/m68k: Optimize the partset instruction using deposit_i32(), Philippe Mathieu-Daudé, 2019/03/09
- [Qemu-devel] [PATCH 3/6] target/m68k: Fix a tcg_temp leak, Philippe Mathieu-Daudé, 2019/03/09
- [Qemu-devel] [PATCH 4/6] target/m68k: Optimize get_sr() using deposit_i32(), Philippe Mathieu-Daudé, 2019/03/09
- [Qemu-devel] [PATCH 6/6] target/m68k: Reduce the scope of the 'zero' tcg_temp, Philippe Mathieu-Daudé, 2019/03/09
- [Qemu-devel] [PATCH 5/6] target/m68k: Optimize rotate_x() using extract_i32(),
Philippe Mathieu-Daudé <=