diff options
Diffstat (limited to 'sysdeps/alpha/strncmp.S')
| -rw-r--r-- | sysdeps/alpha/strncmp.S | 33 |
1 files changed, 5 insertions, 28 deletions
diff --git a/sysdeps/alpha/strncmp.S b/sysdeps/alpha/strncmp.S index ff199eb743..e2b4ebf857 100644 --- a/sysdeps/alpha/strncmp.S +++ b/sysdeps/alpha/strncmp.S @@ -61,10 +61,8 @@ $aligned: ornot t0, t3, t0 # .. e1 : cmpbge zero, t1, t7 # e0 : bits set iff null found beq a2, $eoc # .. e1 : check end of count - unop # e0 : + subq a2, 1, a2 # e0 : bne t7, $eos # .. e1 : - unop # e0 : - beq t10, $ant_loop # .. e1 : /* Aligned compare main loop. On entry to this basic block: @@ -76,30 +74,13 @@ $a_loop: bne t2, $wordcmp # .. e1 (zdb) ldq_u t1, 8(a1) # e0 : ldq_u t0, 8(a0) # .. e1 : - subq a2, 1, a2 # e0 : - addq a1, 8, a1 # .. e1 : - addq a0, 8, a0 # e0 : - beq a2, $eoc # .. e1 : - cmpbge zero, t1, t7 # e0 : - beq t7, $a_loop # .. e1 : - unop # e0 : - br $eos # .. e1 : - - /* Alternate aligned compare loop, for when there's no trailing - bytes on the count. We have to avoid reading too much data. */ -$ant_loop: - xor t0, t1, t2 # e0 : - bne t2, $wordcmp # .. e1 (zdb) - subq a2, 1, a2 # e0 : - beq a2, $zerolength # .. e1 : - ldq_u t1, 8(a1) # e0 : - ldq_u t0, 8(a0) # .. e1 : addq a1, 8, a1 # e0 : addq a0, 8, a0 # .. e1 : cmpbge zero, t1, t7 # e0 : - beq t7, $ant_loop # .. e1 : - unop # e0 : - br $eos # .. e1 : + beq a2, $eoc # .. e1 : + subq a2, 1, a2 # e0 : + beq t7, $a_loop # .. e1 : + br $eos # e1 : /* The two strings are not co-aligned. Align s1 and cope. */ $unaligned: @@ -203,8 +184,6 @@ $u_final: $eoc: mskql t0, t10, t0 mskql t1, t10, t1 - unop - cmpbge zero, t1, t7 /* We've found a zero somewhere in a word we just read. On entry to this basic block: @@ -224,7 +203,6 @@ $eos: /* Here we have two differing co-aligned words in t0 & t1. Bytewise compare them and return (t0 > t1 ? 1 : -1). */ - .align 3 $wordcmp: cmpbge t0, t1, t2 # e0 : comparison yields bit mask of ge cmpbge t1, t0, t3 # .. e1 : @@ -238,7 +216,6 @@ $wordcmp: $done: ret # e1 : - .align 3 $zerolength: clr v0 ret |