diff options
Diffstat (limited to 'sysdeps/alpha/alphaev6/stxncpy.S')
| -rw-r--r-- | sysdeps/alpha/alphaev6/stxncpy.S | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/sysdeps/alpha/alphaev6/stxncpy.S b/sysdeps/alpha/alphaev6/stxncpy.S index d134eb8c10..28495df004 100644 --- a/sysdeps/alpha/alphaev6/stxncpy.S +++ b/sysdeps/alpha/alphaev6/stxncpy.S @@ -143,18 +143,25 @@ $a_eoc: .align 4 __stxncpy: /* Are source and destination co-aligned? */ + lda t2, -1 # E : xor a0, a1, t1 # E : and a0, 7, t0 # E : find dest misalignment - and t1, 7, t1 # E : (stall) - addq a2, t0, a2 # E : bias count by dest misalignment (stall) + nop # E : - subq a2, 1, a2 # E : + srl t2, 1, t2 # U : + and t1, 7, t1 # E : + cmovlt a2, t2, a2 # E : bound count to LONG_MAX (stall) + nop # E : + + addq a2, t0, a2 # E : bias count by dest misalignment + subq a2, 1, a2 # E : (stall) and a2, 7, t2 # E : (stall) - srl a2, 3, a2 # U : a2 = loop counter = (count - 1)/8 (stall) - addq zero, 1, t10 # E : + lda t10, 1 # E : + srl a2, 3, a2 # U : a2 = loop counter = (count - 1)/8 sll t10, t2, t10 # U : t10 = bitmask of last count byte - bne t1, $unaligned # U : + nop # E : + bne t1, $unaligned # U : (stall) /* We are co-aligned; take care of a partial first word. */ ldq_u t1, 0(a1) # L : load first src word |