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sh: Provide an __sdivsi3_2 export for sh64.

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Newer code paths that are heavier in 64-bit math manage to get this
generated by newer compilers, provide a definition and export
accordingly. This is trivially wrapped around the existing __sdivsi3
code.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-05-09 17:57:21 +09:00
parent 2bcfffa423
commit 1031a3a57e
2 changed files with 7 additions and 1 deletions
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2
arch/sh/kernel/sh_ksyms_64.c
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@ -76,5 +76,7 @@ EXPORT_SYMBOL(strcpy);
#define DECLARE_EXPORT(name) extern void name(void);EXPORT_SYMBOL(name)
DECLARE_EXPORT(__sdivsi3);
DECLARE_EXPORT(__sdivsi3_1);
DECLARE_EXPORT(__sdivsi3_2);
DECLARE_EXPORT(__udivsi3);
DECLARE_EXPORT(__div_table);

6
arch/sh/lib64/sdivsi3.S
View File

@ -1,4 +1,6 @@
.global __sdivsi3
.global __sdivsi3_1
.global __sdivsi3_2
.section .text..SHmedia32,"ax"
.align 2
@ -6,13 +8,15 @@
/* clobbered: r1,r18,r19,r20,r21,r25,tr0 */
/* result in r0 */
__sdivsi3:
__sdivsi3_1:
ptb __div_table,tr0
gettr tr0,r20
__sdivsi3_2:
nsb r5, r1
shlld r5, r1, r25 /* normalize; [-2 ..1, 1..2) in s2.62 */
shari r25, 58, r21 /* extract 5(6) bit index (s2.4 with hole -1..1) */
/* bubble */
gettr tr0,r20
ldx.ub r20, r21, r19 /* u0.8 */
shari r25, 32, r25 /* normalize to s2.30 */
shlli r21, 1, r21