diff options
Diffstat (limited to 'newlib/libc/machine/sh/strcmp.S')
| -rw-r--r-- | newlib/libc/machine/sh/strcmp.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/newlib/libc/machine/sh/strcmp.S b/newlib/libc/machine/sh/strcmp.S new file mode 100644 index 00000000000..a112b13e00f --- /dev/null +++ b/newlib/libc/machine/sh/strcmp.S @@ -0,0 +1,66 @@ +! Entry: r4: destination +! r5: source +! Exit: r0: result +! r1-r2,r4-r5: clobbered + +#include "asm.h" + +ENTRY(strcmp) + mov r4,r0 + or r5,r0 + tst #3,r0 + bf L_setup_char_loop + mov #0,r0 +#ifdef DELAYED_BRANCHES + mov.l @r4+,r1 + .align 2 +Longword_loop: + mov.l @r5+,r2 + cmp/str r0,r1 + bt Longword_loop_end + cmp/eq r1,r2 + bt.s Longword_loop + mov.l @r4+,r1 + add #-4, r4 +Longword_loop_end: + add #-4, r4 + add #-4, r5 +L_setup_char_loop: + mov.b @r4+,r0 + .align 2 +L_char_loop: + mov.b @r5+,r1 + tst r0,r0 + bt L_return + cmp/eq r0,r1 + bt.s L_char_loop + mov.b @r4+,r0 + add #-2,r4 + mov.b @r4,r0 +#else /* ! DELAYED_BRANCHES */ + .align 2 +Longword_loop: + mov.l @r4+,r1 + mov.l @r5+,r2 + cmp/str r0,r1 + bt Longword_loop_end + cmp/eq r1,r2 + bt Longword_loop +Longword_loop_end: + add #-4, r4 + add #-4, r5 + .align 2 +L_setup_char_loop: +L_char_loop: + mov.b @r4+,r0 + mov.b @r5+,r1 + tst r0,r0 + bt L_return + cmp/eq r0,r1 + bt L_char_loop +#endif +L_return: + extu.b r0,r0 + extu.b r1,r1 + rts + sub r1,r0 |