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[PATCH v2 23/29] target/arm: Improve REVSH
From: |
Richard Henderson |
Subject: |
[PATCH v2 23/29] target/arm: Improve REVSH |
Date: |
Mon, 21 Jun 2021 16:18:43 -0700 |
The new bswap flags can implement the semantics exactly.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/translate.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 669b0be578..a0c6cfa902 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -354,9 +354,7 @@ void gen_rev16(TCGv_i32 dest, TCGv_i32 var)
/* Byteswap low halfword and sign extend. */
static void gen_revsh(TCGv_i32 dest, TCGv_i32 var)
{
- tcg_gen_ext16u_i32(var, var);
- tcg_gen_bswap16_i32(var, var, TCG_BSWAP_IZ | TCG_BSWAP_OZ);
- tcg_gen_ext16s_i32(dest, var);
+ tcg_gen_bswap16_i32(var, var, TCG_BSWAP_OS);
}
/* Dual 16-bit add. Result placed in t0 and t1 is marked as dead.
--
2.25.1
- [PATCH v2 17/29] tcg: Handle new bswap flags during optimize, (continued)
- [PATCH v2 17/29] tcg: Handle new bswap flags during optimize, Richard Henderson, 2021/06/21
- [PATCH v2 22/29] target/arm: Improve vector REV, Richard Henderson, 2021/06/21
- [PATCH v2 24/29] target/i386: Improve bswap translation, Richard Henderson, 2021/06/21
- [PATCH v2 19/29] tcg: Make use of bswap flags in tcg_gen_qemu_ld_*, Richard Henderson, 2021/06/21
- [PATCH v2 20/29] tcg: Make use of bswap flags in tcg_gen_qemu_st_*, Richard Henderson, 2021/06/21
- [PATCH v2 18/29] tcg: Add flags argument to tcg_gen_bswap16_*, tcg_gen_bswap32_i64, Richard Henderson, 2021/06/21
- [PATCH v2 25/29] target/sh4: Improve swap.b translation, Richard Henderson, 2021/06/21
- [PATCH v2 21/29] target/arm: Improve REV32, Richard Henderson, 2021/06/21
- [PATCH v2 23/29] target/arm: Improve REVSH,
Richard Henderson <=
- [PATCH v2 26/29] target/mips: Fix gen_mxu_s32ldd_s32lddr, Richard Henderson, 2021/06/21
- [PATCH v2 28/29] tcg/aarch64: Unset TCG_TARGET_HAS_MEMORY_BSWAP, Richard Henderson, 2021/06/21
- [PATCH v2 29/29] tcg/riscv: Remove MO_BSWAP handling, Richard Henderson, 2021/06/21
- [PATCH v2 27/29] tcg/arm: Unset TCG_TARGET_HAS_MEMORY_BSWAP, Richard Henderson, 2021/06/21
- Re: [PATCH v2 00/29] tcg: bswap improvements, no-reply, 2021/06/21