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[PULL 56/63] target/arm: Improve vector REV
From: |
Richard Henderson |
Subject: |
[PULL 56/63] target/arm: Improve vector REV |
Date: |
Tue, 29 Jun 2021 11:54:48 -0700 |
We can eliminate the requirement for a zero-extended output,
because the following store will ignore any garbage high bits.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/translate-a64.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 304fd3d370..1a40e49db7 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -12444,12 +12444,10 @@ static void handle_rev(DisasContext *s, int opcode,
bool u,
read_vec_element(s, tcg_tmp, rn, i, grp_size);
switch (grp_size) {
case MO_16:
- tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp,
- TCG_BSWAP_IZ | TCG_BSWAP_OZ);
+ tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp, TCG_BSWAP_IZ);
break;
case MO_32:
- tcg_gen_bswap32_i64(tcg_tmp, tcg_tmp,
- TCG_BSWAP_IZ | TCG_BSWAP_OZ);
+ tcg_gen_bswap32_i64(tcg_tmp, tcg_tmp, TCG_BSWAP_IZ);
break;
case MO_64:
tcg_gen_bswap64_i64(tcg_tmp, tcg_tmp);
--
2.25.1
- [PULL 47/63] tcg/s390: Support bswap flags, (continued)
- [PULL 47/63] tcg/s390: Support bswap flags, Richard Henderson, 2021/06/29
- [PULL 49/63] tcg/mips: Support bswap flags in tcg_out_bswap32, Richard Henderson, 2021/06/29
- [PULL 46/63] tcg/ppc: Use power10 byte-reverse instructions, Richard Henderson, 2021/06/29
- [PULL 52/63] tcg: Add flags argument to tcg_gen_bswap16_*, tcg_gen_bswap32_i64, Richard Henderson, 2021/06/29
- [PULL 51/63] tcg: Handle new bswap flags during optimize, Richard Henderson, 2021/06/29
- [PULL 54/63] tcg: Make use of bswap flags in tcg_gen_qemu_st_*, Richard Henderson, 2021/06/29
- [PULL 50/63] tcg/tci: Support bswap flags, Richard Henderson, 2021/06/29
- [PULL 53/63] tcg: Make use of bswap flags in tcg_gen_qemu_ld_*, Richard Henderson, 2021/06/29
- [PULL 57/63] target/arm: Improve REVSH, Richard Henderson, 2021/06/29
- [PULL 59/63] target/sh4: Improve swap.b translation, Richard Henderson, 2021/06/29
- [PULL 56/63] target/arm: Improve vector REV,
Richard Henderson <=
- [PULL 58/63] target/i386: Improve bswap translation, Richard Henderson, 2021/06/29
- [PULL 62/63] tcg/aarch64: Unset TCG_TARGET_HAS_MEMORY_BSWAP, Richard Henderson, 2021/06/29
- [PULL 60/63] target/mips: Fix gen_mxu_s32ldd_s32lddr, Richard Henderson, 2021/06/29
- [PULL 55/63] target/arm: Improve REV32, Richard Henderson, 2021/06/29
- [PULL 63/63] tcg/riscv: Remove MO_BSWAP handling, Richard Henderson, 2021/06/29
- [PULL 61/63] tcg/arm: Unset TCG_TARGET_HAS_MEMORY_BSWAP, Richard Henderson, 2021/06/29