diff options
Diffstat (limited to 'sysdeps/alpha/alphaev67/strncat.S')
| -rw-r--r-- | sysdeps/alpha/alphaev67/strncat.S | 56 |
1 files changed, 22 insertions, 34 deletions
diff --git a/sysdeps/alpha/alphaev67/strncat.S b/sysdeps/alpha/alphaev67/strncat.S index 4d199d95fe..31ca19d299 100644 --- a/sysdeps/alpha/alphaev67/strncat.S +++ b/sysdeps/alpha/alphaev67/strncat.S @@ -38,57 +38,45 @@ ENTRY(strncat) #endif .prologue 1 - mov $16, $0 # set up return value - beq $18, $zerocount # U : + mov a0, v0 # set up return value + beq a2, $zerocount # U : /* Find the end of the string. */ - ldq_u $1, 0($16) # L : load first quadword ($16 may be misaligned) - lda $2, -1($31) # E : + ldq_u t0, 0(a0) # L : load first quadword (a0 may be misaligned) + lda t1, -1 # E : - insqh $2, $0, $2 # U : - andnot $16, 7, $16 # E : + insqh t1, v0, t1 # U : + andnot a0, 7, a0 # E : nop # E : - or $2, $1, $1 # E : + or t1, t0, t0 # E : nop # E : nop # E : - cmpbge $31, $1, $2 # E : bits set iff byte == 0 - bne $2, $found # U : + cmpbge zero, t0, t1 # E : bits set iff byte == 0 + bne t1, $found # U : -$loop: ldq $1, 8($16) # L : - addq $16, 8, $16 # E : - cmpbge $31, $1, $2 # E : - beq $2, $loop # U : +$loop: ldq t0, 8(a0) # L : + addq a0, 8, a0 # E : + cmpbge zero, t0, t1 # E : + beq t1, $loop # U : -$found: cttz $2, $3 # U0 : - addq $16, $3, $16 # E : - jsr $23, __stxncpy # L0 :/* Now do the append. */ +$found: cttz t1, t2 # U0 : + addq a0, t2, a0 # E : + jsr t9, __stxncpy # L0 : Now do the append. /* Worry about the null termination. */ - zapnot $1, $27, $2 # U : was last byte a null? - cmplt $27, $24, $5 # E : did we fill the buffer completely? - bne $2, 0f # U : - ret # L0 : - -0: or $5, $18, $2 # E : - nop - bne $2, 2f # U : - and $24, 0x80, $3 # E : no zero next byte - + cttz t10, t2 # U0: byte offset of end-of-count. nop # E : - bne $3, 1f # U : - /* Here there are bytes left in the current word. Clear one. */ - addq $24, $24, $24 # E : end-of-count bit <<= 1 + zapnot t0, t8, t1 # U : was last byte a null? nop # E : -2: zap $1, $24, $1 # U : + bne t1, 0f # U : + nop # E : nop # E : - stq_u $1, 0($16) # L : ret # L0 : -1: /* Here we must clear the first byte of the next DST word */ - stb $31, 8($16) # L : - nop # E : +0: addq t2, a0, a0 # E : address of end-of-count + stb zero, 1(a0) # L : nop # E : ret # L0 : |