diff options
Diffstat (limited to 'sysdeps/alpha/memchr.S')
| -rw-r--r-- | sysdeps/alpha/memchr.S | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/sysdeps/alpha/memchr.S b/sysdeps/alpha/memchr.S index 2d21247..a47ac96 100644 --- a/sysdeps/alpha/memchr.S +++ b/sysdeps/alpha/memchr.S @@ -42,7 +42,7 @@ For correctness consider that: ENTRY(memchr) .prologue 0 - beq a2, not_found + beq a2, $not_found ldq_u t0, 0(a0) # load first quadword (a0 may be misaligned) addq a0, a2, t4 and a1, 0xff, a1 # a1 = 00000000000000ch @@ -57,7 +57,7 @@ ENTRY(memchr) extql t0, a0, t6 or t1, a1, a1 # a1 = chchchchchchchch - beq t3, first_quad + beq t3, $first_quad extqh t5, a0, t5 mov a0, v0 @@ -68,15 +68,15 @@ ENTRY(memchr) # in t0. E.g.: # a2 = 6 # t0 = ????c6c5c4c3c2c1 -last_quad: +$last_quad: negq a2, t5 srl t2, t5, t5 # t5 = mask of a2 bits set xor a1, t0, t0 cmpbge zero, t0, t1 and t1, t5, t1 - beq t1, not_found + beq t1, $not_found -found_it: +$found_it: # now, determine which byte matched: negq t1, t2 and t1, t2, t1 @@ -93,20 +93,20 @@ found_it: addq v0, 1, t2 cmoveq t0, t2, v0 -done: ret +$done: ret # # Deal with the case where a2 > 8 bytes remain to be # searched. a0 may not be aligned. # -first_quad: +$first_quad: andnot a0, 0x7, v0 insqh t2, a0, t1 # t1 = 0000ffffffffffff (a0<0:2> ff bytes) xor t0, a1, t0 or t0, t1, t0 # t0 = ====ffffffffffff cmpbge zero, t0, t1 - bne t1, found_it + bne t1, $found_it /* at least one byte left to process */ @@ -119,41 +119,41 @@ first_quad: subq t4, 1, a2 andnot a2, 0x7, a2 cmpult v0, a2, t1 - beq t1, final + beq t1, $final /* at least two quads remain to be accessed */ subq a2, v0, t3 # t3 <- number of quads to be processed in loop and t3, 8, t3 # odd number of quads? - bne t3, odd_quad_count + bne t3, $odd_quad_count /* at least three quads remain to be accessed */ mov t0, t3 # move prefetched value into correct register .align 3 -unrolled_loop: +$unrolled_loop: ldq t0, 8(v0) # prefetch t0 xor a1, t3, t1 cmpbge zero, t1, t1 - bne t1, found_it + bne t1, $found_it addq v0, 8, v0 -odd_quad_count: +$odd_quad_count: xor a1, t0, t1 ldq t3, 8(v0) # prefetch t3 cmpbge zero, t1, t1 - bne t1, found_it + bne t1, $found_it addq v0, 8, v0 cmpult v0, a2, t5 - bne t5, unrolled_loop + bne t5, $unrolled_loop mov t3, t0 # move prefetched value into t0 -final: subq t4, v0, a2 # a2 <- number of bytes left to do - bne a2, last_quad +$final: subq t4, v0, a2 # a2 <- number of bytes left to do + bne a2, $last_quad -not_found: +$not_found: mov zero, v0 ret |