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aarch64: Fix store-exclusive in load-operate LSE helpers 

PR target/91834
	* config/aarch64/lse.S (LDNM): Ensure STXR output does not
	overlap the inputs.

From-SVN: r276133
This commit is contained in:
Richard Henderson 2019-09-25 21:48:41 +00:00 committed by Richard Henderson
parent 736a6efc4f
commit 88a51d68c4
2 changed files with 8 additions and 2 deletions
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6
libgcc/ChangeLog
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@ -1,3 +1,9 @@
2019-09-25 Richard Henderson <richard.henderson@linaro.org>
PR target/91834
* config/aarch64/lse.S (LDNM): Ensure STXR output does not
overlap the inputs.
2019-09-25 Shaokun Zhang <zhangshaokun@hisilicon.com>
* config/aarch64/sync-cache.c (__aarch64_sync_cache_range): Add support for

4
libgcc/config/aarch64/lse.S
View File

@ -227,8 +227,8 @@ STARTFN NAME(LDNM)
8: mov s(tmp0), s(0)
0: LDXR s(0), [x1]
OP s(tmp1), s(0), s(tmp0)
STXR w(tmp1), s(tmp1), [x1]
cbnz w(tmp1), 0b
STXR w(tmp2), s(tmp1), [x1]
cbnz w(tmp2), 0b
ret
ENDFN NAME(LDNM)