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[Qemu-devel] [PATCH 2/5] tcg/optimize: Optimize bswap
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 2/5] tcg/optimize: Optimize bswap |
Date: |
Tue, 20 Nov 2018 13:15:55 +0100 |
Somehow we forgot these operations, once upon a time.
This will allow immediate stores to have their bswap
optimized away.
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/optimize.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 5dbe11c3c8..6b98ec13e6 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -353,6 +353,15 @@ static TCGArg do_constant_folding_2(TCGOpcode op, TCGArg
x, TCGArg y)
CASE_OP_32_64(ext16u):
return (uint16_t)x;
+ CASE_OP_32_64(bswap16):
+ return bswap16(x);
+
+ CASE_OP_32_64(bswap32):
+ return bswap32(x);
+
+ case INDEX_op_bswap64_i64:
+ return bswap64(x);
+
case INDEX_op_ext_i32_i64:
case INDEX_op_ext32s_i64:
return (int32_t)x;
@@ -1105,6 +1114,9 @@ void tcg_optimize(TCGContext *s)
CASE_OP_32_64(ext16s):
CASE_OP_32_64(ext16u):
CASE_OP_32_64(ctpop):
+ CASE_OP_32_64(bswap16):
+ CASE_OP_32_64(bswap32):
+ case INDEX_op_bswap64_i64:
case INDEX_op_ext32s_i64:
case INDEX_op_ext32u_i64:
case INDEX_op_ext_i32_i64:
--
2.17.2
- [Qemu-devel] [PATCH 0/5] tcg: Make bswap support in qemu_ld/st optional, Richard Henderson, 2018/11/20
- [Qemu-devel] [PATCH 1/5] tcg: Add TCG_TARGET_HAS_MEMORY_BSWAP, Richard Henderson, 2018/11/20
- [Qemu-devel] [PATCH 2/5] tcg/optimize: Optimize bswap,
Richard Henderson <=
- [Qemu-devel] [PATCH 4/5] tcg/aarch64: Set TCG_TARGET_HAS_MEMORY_BSWAP to false, Richard Henderson, 2018/11/20
- [Qemu-devel] [PATCH 3/5] tcg/i386: Set TCG_TARGET_HAS_MEMORY_BSWAP with have_movbe, Richard Henderson, 2018/11/20
- [Qemu-devel] [PATCH 5/5] tcg/arm: Set TCG_TARGET_HAS_MEMORY_BSWAP to false, Richard Henderson, 2018/11/20
- Re: [Qemu-devel] [PATCH 0/5] tcg: Make bswap support in qemu_ld/st optional, no-reply, 2018/11/21