[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v2 20/29] tcg: Make use of bswap flags in tcg_gen_qemu_st_*
From: |
Richard Henderson |
Subject: |
[PATCH v2 20/29] tcg: Make use of bswap flags in tcg_gen_qemu_st_* |
Date: |
Mon, 21 Jun 2021 16:18:40 -0700 |
By removing TCG_BSWAP_IZ we indicate that the input is
not zero-extended, and thus can remove an explicit extend.
By removing TCG_BSWAP_OZ, we allow the implementation to
leave high bits set, which will be ignored by the store.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/tcg-op.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 0eac2d1969..44d711c0fc 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -2915,8 +2915,7 @@ void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg
idx, MemOp memop)
swap = tcg_temp_new_i32();
switch (memop & MO_SIZE) {
case MO_16:
- tcg_gen_ext16u_i32(swap, val);
- tcg_gen_bswap16_i32(swap, swap, TCG_BSWAP_IZ | TCG_BSWAP_OZ);
+ tcg_gen_bswap16_i32(swap, val, 0);
break;
case MO_32:
tcg_gen_bswap32_i32(swap, val);
@@ -3013,12 +3012,10 @@ void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr,
TCGArg idx, MemOp memop)
swap = tcg_temp_new_i64();
switch (memop & MO_SIZE) {
case MO_16:
- tcg_gen_ext16u_i64(swap, val);
- tcg_gen_bswap16_i64(swap, swap, TCG_BSWAP_IZ | TCG_BSWAP_OZ);
+ tcg_gen_bswap16_i64(swap, val, 0);
break;
case MO_32:
- tcg_gen_ext32u_i64(swap, val);
- tcg_gen_bswap32_i64(swap, swap, TCG_BSWAP_IZ | TCG_BSWAP_OZ);
+ tcg_gen_bswap32_i64(swap, val, 0);
break;
case MO_64:
tcg_gen_bswap64_i64(swap, val);
--
2.25.1
- Re: [PATCH v2 14/29] tcg/mips: Support bswap flags in tcg_out_bswap16, (continued)
- [PATCH v2 16/29] tcg/tci: Support bswap flags, Richard Henderson, 2021/06/21
- [PATCH v2 15/29] tcg/mips: Support bswap flags in tcg_out_bswap32, Richard Henderson, 2021/06/21
- [PATCH v2 13/29] tcg/s390: Support bswap flags, Richard Henderson, 2021/06/21
- [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 <=
- [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, 2021/06/21
- [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