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[Qemu-devel] [PULL 07/14] target/arm: optimize aarch32 rev16
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 07/14] target/arm: optimize aarch32 rev16 |
Date: |
Tue, 18 Jul 2017 18:57:15 -1000 |
From: Aurelien Jarno <address@hidden>
Use the same mask to avoid having to load two different constants, as
suggested by Richard Henderson.
Signed-off-by: Aurelien Jarno <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
target/arm/translate.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index e27736c..d3003ae 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -343,11 +343,13 @@ static void gen_smul_dual(TCGv_i32 a, TCGv_i32 b)
static void gen_rev16(TCGv_i32 var)
{
TCGv_i32 tmp = tcg_temp_new_i32();
+ TCGv_i32 mask = tcg_const_i32(0x00ff00ff);
tcg_gen_shri_i32(tmp, var, 8);
- tcg_gen_andi_i32(tmp, tmp, 0x00ff00ff);
+ tcg_gen_and_i32(tmp, tmp, mask);
+ tcg_gen_and_i32(var, var, mask);
tcg_gen_shli_i32(var, var, 8);
- tcg_gen_andi_i32(var, var, 0xff00ff00);
tcg_gen_or_i32(var, var, tmp);
+ tcg_temp_free_i32(mask);
tcg_temp_free_i32(tmp);
}
--
2.9.4
- [Qemu-devel] [PULL 00/14] tcg-next patch queue, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 02/14] util/cacheinfo: Add missing include for ppc linux, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 01/14] tcg/mips: reserve a register for the guest_base., Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 03/14] tcg: Expand glue macros before stringifying helper names, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 04/14] coccinelle: ignore ASTs pre-parsed cached C files, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 05/14] coccinelle: add a script to optimize tcg op using tcg_gen_extract(), Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 06/14] target/arm: Optimize aarch64 rev16, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 07/14] target/arm: optimize aarch32 rev16,
Richard Henderson <=
- [Qemu-devel] [PULL 08/14] target/m68k: optimize bcd_flags() using extract op, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 09/14] target/ppc: optimize various functions using extract op, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 10/14] target/sparc: optimize various functions using extract op, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 11/14] target/sparc: optimize gen_op_mulscc() using deposit op, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 12/14] target/alpha: optimize gen_cvtlq() using deposit op, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 13/14] tcg/tci: enable bswap16_i64, Richard Henderson, 2017/07/19
- [Qemu-devel] [PULL 14/14] tcg: Pass generic CPUState to gen_intermediate_code(), Richard Henderson, 2017/07/19
- Re: [Qemu-devel] [PULL 00/14] tcg-next patch queue, no-reply, 2017/07/19
- Re: [Qemu-devel] [PULL 00/14] tcg-next patch queue, Peter Maydell, 2017/07/19