diff options
Diffstat (limited to 'sysdeps/s390/s390-32/memcpy.S')
| -rw-r--r-- | sysdeps/s390/s390-32/memcpy.S | 50 |
1 files changed, 30 insertions, 20 deletions
diff --git a/sysdeps/s390/s390-32/memcpy.S b/sysdeps/s390/s390-32/memcpy.S index 2ac51ab62e..6be5104b68 100644 --- a/sysdeps/s390/s390-32/memcpy.S +++ b/sysdeps/s390/s390-32/memcpy.S @@ -25,12 +25,23 @@ %r3 = address of source memory area %r4 = number of bytes to copy. */ -#ifdef USE_MULTIARCH -ENTRY(__memcpy_default) -#else -ENTRY(memcpy) + .text +ENTRY(__mempcpy) + .machine "g5" + lr %r1,%r2 # Use as dest + la %r2,0(%r4,%r2) # Return dest + n + j .L_G5_start +END(__mempcpy) +#ifndef USE_MULTIARCH +libc_hidden_def (__mempcpy) +weak_alias (__mempcpy, mempcpy) +libc_hidden_builtin_def (mempcpy) #endif + +ENTRY(memcpy) .machine "g5" + lr %r1,%r2 # r1: Use as dest ; r2: Return dest +.L_G5_start: st %r13,52(%r15) .cfi_offset 13, -44 basr %r13,0 @@ -41,14 +52,13 @@ ENTRY(memcpy) lr %r5,%r4 srl %r5,8 ltr %r5,%r5 - lr %r1,%r2 jne .L_G5_13 ex %r4,.L_G5_17-.L_G5_16(%r13) .L_G5_4: l %r13,52(%r15) br %r14 .L_G5_13: - chi %r5,4096 # Switch to mvcle for copies >1MB + chi %r5,4096 # Switch to mvcle for copies >1MB jh __memcpy_mvcle .L_G5_12: mvc 0(256,%r1),0(%r3) @@ -59,24 +69,24 @@ ENTRY(memcpy) j .L_G5_4 .L_G5_17: mvc 0(1,%r1),0(%r3) -#ifdef USE_MULTIARCH -END(__memcpy_default) -#else END(memcpy) +#ifndef USE_MULTIARCH libc_hidden_builtin_def (memcpy) #endif ENTRY(__memcpy_mvcle) - # Using as standalone function will result in unexpected - # results since the length field is incremented by 1 in order to - # compensate the changes already done in the functions above. - ahi %r4,1 # length + 1 - lr %r5,%r4 # source length - lr %r4,%r3 # source address - lr %r3,%r5 # destination length = source length + # Using as standalone function will result in unexpected + # results since the length field is incremented by 1 in order to + # compensate the changes already done in the functions above. + lr %r0,%r2 # backup return dest [ + n ] + ahi %r4,1 # length + 1 + lr %r5,%r4 # source length + lr %r4,%r3 # source address + lr %r2,%r1 # destination address + lr %r3,%r5 # destination length = source length .L_MVCLE_1: - mvcle %r2,%r4,0 # thats it, MVCLE is your friend - jo .L_MVCLE_1 - lr %r2,%r1 # return destination address - br %r14 + mvcle %r2,%r4,0 # thats it, MVCLE is your friend + jo .L_MVCLE_1 + lr %r2,%r0 # return destination address + br %r14 END(__memcpy_mvcle) |