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From: Sebastian Huber <sh@sourceware.org>
To: newlib-cvs@sourceware.org
Subject: [newlib-cygwin] powerpc/setjmp: Fix 64-bit buffer alignment
Date: Thu, 10 Nov 2022 15:06:52 +0000 (GMT) [thread overview]
Message-ID: <20221110150652.64E013858439@sourceware.org> (raw)
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=5c79aa4b22df09b6fb3e97538fee7f108f9fd768
commit 5c79aa4b22df09b6fb3e97538fee7f108f9fd768
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Mon Nov 7 14:33:42 2022 +0100
powerpc/setjmp: Fix 64-bit buffer alignment
The rlwinm is a word-size instruction which clears the remaining 32 bits of a
64-bit register. Use clrrdi in 64-bit configurations.
Diff:
---
newlib/libc/machine/powerpc/setjmp.S | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/newlib/libc/machine/powerpc/setjmp.S b/newlib/libc/machine/powerpc/setjmp.S
index 3a6fa4a58..c7af5b105 100644
--- a/newlib/libc/machine/powerpc/setjmp.S
+++ b/newlib/libc/machine/powerpc/setjmp.S
@@ -8,11 +8,19 @@
FUNC_START(setjmp)
#ifdef __ALTIVEC__
addi 3,3,15 # align Altivec to 16 byte boundary
+#if __powerpc64__
+ clrrdi 3,3,4
+#else
rlwinm 3,3,0,0,27
+#endif
#else
addi 3,3,7 # align to 8 byte boundary
+#if __powerpc64__
+ clrrdi 3,3,3
+#else
rlwinm 3,3,0,0,28
#endif
+#endif
#if __SPE__
/* If we are E500, then save 64-bit registers. */
evstdd 1,0(3) # offset 0
@@ -193,11 +201,19 @@ FUNC_END(setjmp)
FUNC_START(longjmp)
#ifdef __ALTIVEC__
addi 3,3,15 # align Altivec to 16 byte boundary
+#if __powerpc64__
+ clrrdi 3,3,4
+#else
rlwinm 3,3,0,0,27
+#endif
#else
addi 3,3,7 # align to 8 byte boundary
+#if __powerpc64__
+ clrrdi 3,3,3
+#else
rlwinm 3,3,0,0,28
#endif
+#endif
#if __SPE__
/* If we are E500, then restore 64-bit registers. */
evldd 1,0(3) # offset 0
reply other threads:[~2022-11-10 15:06 UTC|newest]
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