64 lines
1.7 KiB
Diff
64 lines
1.7 KiB
Diff
From e0bd6c2bee0614fc4112a0a86a808edd0d550b6f Mon Sep 17 00:00:00 2001
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From: Patrick O'Neill <patrick@rivosinc.com>
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Date: Fri, 21 Apr 2023 13:11:35 -0700
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Subject: [PATCH] RISC-V: Enforce subword atomic LR/SC SEQ_CST
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Replace LR.aq/SC.rl pairs with the SEQ_CST LR.aqrl/SC.rl pairs
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recommended by table A.6 of the ISA manual.
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2023-04-27 Patrick O'Neill <patrick@rivosinc.com>
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gcc/ChangeLog:
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* config/riscv/sync.md: Change LR.aq/SC.rl pairs into
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sequentially consistent LR.aqrl/SC.rl pairs.
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Signed-off-by: Patrick O'Neill <patrick@rivosinc.com>
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---
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gcc/config/riscv/sync.md | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/gcc/config/riscv/sync.md b/gcc/config/riscv/sync.md
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index 192745282626..0c83ef046070 100644
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--- a/gcc/config/riscv/sync.md
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+++ b/gcc/config/riscv/sync.md
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@@ -109,7 +109,7 @@
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"TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
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{
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return "1:\;"
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- "lr.w.aq\t%0, %1\;"
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+ "lr.w.aqrl\t%0, %1\;"
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"<insn>\t%5, %0, %2\;"
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"and\t%5, %5, %3\;"
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"and\t%6, %0, %4\;"
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@@ -173,7 +173,7 @@
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"TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
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{
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return "1:\;"
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- "lr.w.aq\t%0, %1\;"
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+ "lr.w.aqrl\t%0, %1\;"
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"and\t%5, %0, %2\;"
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"not\t%5, %5\;"
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"and\t%5, %5, %3\;"
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@@ -278,7 +278,7 @@
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"TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
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{
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return "1:\;"
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- "lr.w.aq\t%0, %1\;"
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+ "lr.w.aqrl\t%0, %1\;"
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"and\t%4, %0, %3\;"
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"or\t%4, %4, %2\;"
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"sc.w.rl\t%4, %4, %1\;"
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@@ -443,7 +443,7 @@
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"TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
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{
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return "1:\;"
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- "lr.w.aq\t%0, %1\;"
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+ "lr.w.aqrl\t%0, %1\;"
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"and\t%6, %0, %4\;"
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"bne\t%6, %z2, 1f\;"
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"and\t%6, %0, %5\;"
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--
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2.39.3
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