[src/trunk]: src/sys/lib/libkern/arch/sh3 don't clobber r4 and r5

[msaitoh <msaitoh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/8c2c252ccef1
branches:  trunk
changeset: 480092:8c2c252ccef1
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Mon Jan 03 02:40:04 2000 +0000

description:
don't clobber r4 and r5

diffstat:

 sys/lib/libkern/arch/sh3/sdivsi3.S |  22 ++++++++++++----------
 1 files changed, 12 insertions(+), 10 deletions(-)

diffs (52 lines):

diff -r 382881a48f6e -r 8c2c252ccef1 sys/lib/libkern/arch/sh3/sdivsi3.S
--- a/sys/lib/libkern/arch/sh3/sdivsi3.S        Mon Jan 03 02:13:32 2000 +0000
+++ b/sys/lib/libkern/arch/sh3/sdivsi3.S        Mon Jan 03 02:40:04 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sdivsi3.S,v 1.1 1999/09/13 10:31:43 itojun Exp $       */
+/*     $NetBSD: sdivsi3.S,v 1.2 2000/01/03 02:40:04 msaitoh Exp $      */
 
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
@@ -40,31 +40,33 @@
 
 #include <machine/asm.h>
 #if defined(LIBC_SCCS)
-       RCSID("$NetBSD: sdivsi3.S,v 1.1 1999/09/13 10:31:43 itojun Exp $")
+       RCSID("$NetBSD: sdivsi3.S,v 1.2 2000/01/03 02:40:04 msaitoh Exp $")
 #endif
 
 /* r0 <= r4 / r5 */
 ENTRY(__sdivsi3)
-       tst     r5, r5
+       mov     r4, r0
+       mov     r5, r1
+
+       tst     r1, r1
        bt      div_by_zero
 
        mov     #0, r2
-       div0s   r2, r4
+       div0s   r2, r0
        subc    r3, r3
-       subc    r2, r4
-       div0s   r5, r3
-#define DIVSTEP        rotcl r4; div1 r5, r3
+       subc    r2, r0
+       div0s   r1, r3
+#define DIVSTEP        rotcl r0; div1 r1, r3
        /* repeat 32 times */
        DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP;
        DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP;
        DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP;
        DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP;
 #undef DIVSTEP
-       rotcl   r4
-       addc    r2, r4
+       rotcl   r0
 
        rts
-       mov     r4, r0          /* delay slot */
+       addc    r2, r0          /* delay slot */
 
 div_by_zero:
 #ifdef _KERNEL