# move with the reduced length which is < 256
5: mvcp 0(%r5,%r2),0(%r4),%r0
slr %r3,%r5
- alr %r2,%r5
-6: lr %r5,%r3 # copy remaining size
- ahi %r5,-1 # subtract 1 for xc loop
- bras %r4,8f
- xc 0(1,%r2),0(%r2)
-7: xc 0(256,%r2),0(%r2)
- la %r2,256(%r2)
-8: ahi %r5,-256
- jnm 7b
- ex %r5,0(%r4)
-9: lr %r2,%r3
+6: lr %r2,%r3
br %r14
.section __ex_table,"a"
.long 0b,4b
.globl __copy_in_user_asm
# %r2 = from, %r3 = n, %r4 = to
__copy_in_user_asm:
- ahi %r3,-1
- jo 6f
sacf 256
- bras %r1,4f
-0: ahi %r3,257
-1: mvc 0(1,%r4),0(%r2)
+ bras 1,1f
+ mvc 0(1,%r4),0(%r2)
+0: mvc 0(256,%r4),0(%r2)
+ la %r2,256(%r2)
+ la %r4,256(%r4)
+1: ahi %r3,-256
+ jnm 0b
+2: ex %r3,0(%r1)
+ sacf 0
+ slr %r2,%r2
+ br 14
+3: mvc 0(1,%r4),0(%r2)
la %r2,1(%r2)
la %r4,1(%r4)
ahi %r3,-1
- jnz 1b
-2: lr %r2,%r3
- br %r14
-3: mvc 0(256,%r4),0(%r2)
- la %r2,256(%r2)
- la %r4,256(%r4)
-4: ahi %r3,-256
jnm 3b
-5: ex %r3,4(%r1)
+4: lr %r2,%r3
sacf 0
-6: slr %r2,%r2
br %r14
.section __ex_table,"a"
- .long 1b,2b
- .long 3b,0b
- .long 5b,0b
+ .long 0b,3b
+ .long 2b,3b
+ .long 3b,4b
.previous
.align 4