diff options
Diffstat (limited to 'arch/sh/lib/div64.S')
| -rw-r--r-- | arch/sh/lib/div64.S | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/sh/lib/div64.S b/arch/sh/lib/div64.S new file mode 100644 index 0000000000..4a9a966e71 --- /dev/null +++ b/arch/sh/lib/div64.S @@ -0,0 +1,47 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * unsigned long __xdiv64_32(unsigned long long n, unsigned long d); + */ + +#include <linux/linkage.h> + +.text +ENTRY(__xdiv64_32) +#ifdef CONFIG_CPU_LITTLE_ENDIAN + mov r4, r0 + mov r5, r1 +#else + mov r4, r1 + mov r5, r0 +#endif + cmp/hs r6, r1 + bf.s 1f + mov #0, r2 + + mov r1, r2 + mov #0, r3 + div0u + .rept 32 + rotcl r2 + div1 r6, r3 + .endr + rotcl r2 + mul.l r6, r2 + sts macl, r3 + sub r3, r1 +1: + div0u + .rept 32 + rotcl r0 + div1 r6, r1 + .endr +#ifdef CONFIG_CPU_LITTLE_ENDIAN + mov r2, r1 + rts + rotcl r0 +#else + rotcl r0 + mov r0, r1 + rts + mov r2, r0 +#endif |