diff options
Diffstat (limited to 'sysdeps/sparc/sparc64/strcmp.S')
| -rw-r--r-- | sysdeps/sparc/sparc64/strcmp.S | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc64/strcmp.S b/sysdeps/sparc/sparc64/strcmp.S index 8925396ec6..f32b0fc779 100644 --- a/sysdeps/sparc/sparc64/strcmp.S +++ b/sysdeps/sparc/sparc64/strcmp.S @@ -121,6 +121,37 @@ ENTRY(strcmp) movleu %xcc, -1, %o0 srlx rTMP1, 7, rTMP1 + /* In order not to be influenced by bytes after the zero byte, we + * have to retain only the highest bit in the mask for the comparison + * with rSTRXOR to work properly. + */ + mov 0, rTMP2 + andcc rTMP1, 0x0100, %g0 + + movne %xcc, 8, rTMP2 + sllx rTMP1, 63 - 16, %o1 + + movrlz %o1, 16, rTMP2 + sllx rTMP1, 63 - 24, %o1 + + movrlz %o1, 24, rTMP2 + sllx rTMP1, 63 - 32, %o1 + + movrlz %o1, 32, rTMP2 + sllx rTMP1, 63 - 40, %o1 + + movrlz %o1, 40, rTMP2 + sllx rTMP1, 63 - 48, %o1 + + movrlz %o1, 48, rTMP2 + sllx rTMP1, 63 - 56, %o1 + + movrlz %o1, 56, rTMP2 + + srlx rTMP1, rTMP2, rTMP1 + + sllx rTMP1, rTMP2, rTMP1 + cmp rTMP1, rSTRXOR retl movgu %xcc, 0, %o0 |