diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc64/power9')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/power9/strcmp.S | 30 |
1 files changed, 8 insertions, 22 deletions
diff --git a/sysdeps/powerpc/powerpc64/power9/strcmp.S b/sysdeps/powerpc/powerpc64/power9/strcmp.S index 3e32396c94..17ec8c24c3 100644 --- a/sysdeps/powerpc/powerpc64/power9/strcmp.S +++ b/sysdeps/powerpc/powerpc64/power9/strcmp.S @@ -65,21 +65,21 @@ EALIGN (strcmp, 4, 0) li r0, 0 - /* Check if [s1]+32 or [s2]+32 will cross a 4K page boundary using + /* Check if [s1]+16 or [s2]+16 will cross a 4K page boundary using the code: (((size_t) s1) % PAGE_SIZE > (PAGE_SIZE - ITER_SIZE)) - with PAGE_SIZE being 4096 and ITER_SIZE begin 32. */ + with PAGE_SIZE being 4096 and ITER_SIZE begin 16. */ rldicl r7, r3, 0, 52 rldicl r9, r4, 0, 52 - cmpldi cr7, r7, 4096-32 + cmpldi cr7, r7, 4096-16 bgt cr7, L(pagecross_check) - cmpldi cr5, r9, 4096-32 + cmpldi cr5, r9, 4096-16 bgt cr5, L(pagecross_check) - /* For short strings up to 32 bytes, load both s1 and s2 using + /* For short strings up to 16 bytes, load both s1 and s2 using unaligned dwords and compare. */ ld r8, 0(r3) ld r10, 0(r4) @@ -95,25 +95,11 @@ EALIGN (strcmp, 4, 0) orc. r9, r12, r11 bne cr0, L(different_nocmpb) - ld r8, 16(r3) - ld r10, 16(r4) - cmpb r12, r8, r0 - cmpb r11, r8, r10 - orc. r9, r12, r11 - bne cr0, L(different_nocmpb) - - ld r8, 24(r3) - ld r10, 24(r4) - cmpb r12, r8, r0 - cmpb r11, r8, r10 - orc. r9, r12, r11 - bne cr0, L(different_nocmpb) - - addi r7, r3, 32 - addi r4, r4, 32 + addi r7, r3, 16 + addi r4, r4, 16 L(align): - /* Now it has checked for first 32 bytes. */ + /* Now it has checked for first 16 bytes. */ vspltisb v0, 0 vspltisb v2, -1 lvsr v6, 0, r4 /* Compute mask. */ |