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don't clobber r4 and r5

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This commit is contained in:
msaitoh 2000-01-03 02:40:04 +00:00
parent 40732a4308
commit b0b4797dfb
1 changed files with 12 additions and 10 deletions
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22
sys/lib/libkern/arch/sh3/sdivsi3.S
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@ -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. * Copyright (c) 1990 The Regents of the University of California.
@ -40,31 +40,33 @@
#include <machine/asm.h> #include <machine/asm.h>
#if defined(LIBC_SCCS) #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 #endif
/* r0 <= r4 / r5 */ /* r0 <= r4 / r5 */
ENTRY(__sdivsi3) ENTRY(__sdivsi3)
tst r5, r5 mov r4, r0
mov r5, r1
tst r1, r1
bt div_by_zero bt div_by_zero
mov #0, r2 mov #0, r2
div0s r2, r4 div0s r2, r0
subc r3, r3 subc r3, r3
subc r2, r4 subc r2, r0
div0s r5, r3 div0s r1, r3
#define DIVSTEP rotcl r4; div1 r5, r3 #define DIVSTEP rotcl r0; div1 r1, r3
/* repeat 32 times */ /* 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;
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 #undef DIVSTEP
rotcl r4 rotcl r0
addc r2, r4
rts rts
mov r4, r0 /* delay slot */ addc r2, r0 /* delay slot */
div_by_zero: div_by_zero:
#ifdef _KERNEL #ifdef _KERNEL