[newlib-cygwin] powerpc/setjmp: Fix 64-bit buffer alignment

[newlib-cygwin] powerpc/setjmp: Fix 64-bit buffer alignment

[Sebastian Huber]

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