84efe72b78
xtensa gcc incorrectly generates code for atomic NAND operation as ~a1 & a2 instead of ~(a1 & a2). Fix that. Backported from: r264087 Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
From 6765eecde2ed8d4be0fc217408b9e9b92a840aff Mon Sep 17 00:00:00 2001
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From: Max Filippov <jcmvbkbc@gmail.com>
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Date: Tue, 4 Sep 2018 00:39:32 -0700
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Subject: [PATCH] gcc: xtensa: fix NAND code in xtensa_expand_atomic
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NAND is ~(a1 & a2), but xtensa_expand_atomic does ~a1 & a2.
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That fixes libatomic tests atomic-op-{1,2}.
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gcc/
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2018-09-04 Max Filippov <jcmvbkbc@gmail.com>
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* config/xtensa/xtensa.c (xtensa_expand_atomic): Reorder AND and
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XOR operations in NAND case.
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Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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Backported from: r264087
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---
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gcc/config/xtensa/xtensa.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/gcc/config/xtensa/xtensa.c b/gcc/config/xtensa/xtensa.c
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index 7cfe64d42895..080bb4ad765d 100644
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--- a/gcc/config/xtensa/xtensa.c
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+++ b/gcc/config/xtensa/xtensa.c
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@@ -1614,9 +1614,9 @@ xtensa_expand_atomic (enum rtx_code code, rtx target, rtx mem, rtx val,
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break;
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case MULT: /* NAND */
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- tmp = expand_simple_binop (SImode, XOR, old, ac.modemask,
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+ tmp = expand_simple_binop (SImode, AND, old, val,
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NULL_RTX, 1, OPTAB_DIRECT);
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- tmp = expand_simple_binop (SImode, AND, tmp, val,
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+ tmp = expand_simple_binop (SImode, XOR, tmp, ac.modemask,
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new_rtx, 1, OPTAB_DIRECT);
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break;
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--
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2.11.0
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