Module Name: src
Committed By: matt
Date: Wed Jul 17 04:57:55 UTC 2013
Modified Files:
src/lib/libc/arch/m68k/gen: alloca.S
Log Message:
Use a more portable series of instructions.
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/lib/libc/arch/m68k/gen/alloca.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/lib/libc/arch/m68k/gen/alloca.S
diff -u src/lib/libc/arch/m68k/gen/alloca.S:1.8 src/lib/libc/arch/m68k/gen/alloca.S:1.9
--- src/lib/libc/arch/m68k/gen/alloca.S:1.8 Tue Jul 16 22:12:20 2013
+++ src/lib/libc/arch/m68k/gen/alloca.S Wed Jul 17 04:57:55 2013
@@ -1,4 +1,4 @@
-/* $NetBSD: alloca.S,v 1.8 2013/07/16 22:12:20 matt Exp $ */
+/* $NetBSD: alloca.S,v 1.9 2013/07/17 04:57:55 matt Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
@@ -39,7 +39,7 @@
#if 0
RCSID("from: @(#)alloca.s 5.1 (Berkeley) 5/12/90")
#else
- RCSID("$NetBSD: alloca.S,v 1.8 2013/07/16 22:12:20 matt Exp $")
+ RCSID("$NetBSD: alloca.S,v 1.9 2013/07/17 04:57:55 matt Exp $")
#endif
#endif /* LIBC_SCCS and not lint */
@@ -49,10 +49,11 @@ ENTRY(alloca)
movl (%sp),%a1 /* save return addr */
movl %sp,%d0 /* get current SP value */
subl 4(%sp),%d0 /* allocate requested space */
- andb #~3,%d0 /* longword align for efficiency */
+ movql #-4,%d1 /* sign extend a mask */
+ andl %d1,%d0 /* longword align for efficiency */
addql #8,%d0 /* reuse space of call frame */
movl %d0,%sp /* set new SP value */
- lea -4(%sp),%sp /* account for argument pop in caller */
+ subql #4,%sp /* account for argument pop in caller */
#ifdef __SVR4_ABI__
moveal %d0,%a0
#endif
