glibc/sysdeps/s390/s390-32/mul_1.S
Siddhesh Poyarekar 30891f35fa Remove "Contributed by" lines
We stopped adding "Contributed by" or similar lines in sources in 2012
in favour of git logs and keeping the Contributors section of the
glibc manual up to date.  Removing these lines makes the license
header a bit more consistent across files and also removes the
possibility of error in attribution when license blocks or files are
copied across since the contributed-by lines don't actually reflect
reality in those cases.

Move all "Contributed by" and similar lines (Written by, Test by,
etc.) into a new file CONTRIBUTED-BY to retain record of these
contributions.  These contributors are also mentioned in
manual/contrib.texi, so we just maintain this additional record as a
courtesy to the earlier developers.

The following scripts were used to filter a list of files to edit in
place and to clean up the CONTRIBUTED-BY file respectively.  These
were not added to the glibc sources because they're not expected to be
of any use in future given that this is a one time task:

https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc
https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-09-03 22:06:44 +05:30

55 lines
1.7 KiB
ArmAsm

/* __mpn_mul_1 -- Multiply a limb vector with a limb and store
the result in a second limb vector.
Copyright (C) 2000-2021 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.
The GNU MP Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library; see the file COPYING.LIB. If not,
see <https://www.gnu.org/licenses/>. */
/*
INPUT PARAMETERS
res_ptr %r2
s1_ptr %r3
size %r4
s2_limb %r5
*/
#include <sysdep.h>
#include "asm-syntax.h"
.text
ENTRY(__mpn_mul_1)
st %r6,24(%r15)
cfi_offset (%r6, -72)
slr %r6,%r6 # cy_limb = 0
.L0: icm %r1,15,0(%r3) # get s1_ptr[i]
mr %r0,%r5 # umul_ppmm(prod_high,prod_low,s1_ptr[j],s2_limb)
jnm .L1
alr %r0,%r5
.L1: ltr %r5,%r5
jnm .L2
al %r0,0(%r3)
.L2: alr %r1,%r6 # prod_low += cy_limb
lr %r6,%r0 # cy_limb = prod_high
brc 12,.L3
ahi %r6,1 # + (prod_low < cy_limb)
.L3: st %r1,0(%r2)
la %r2,4(0,%r2)
la %r3,4(0,%r3)
brct %r4,.L0
lr %r2,%r6 # return cy_limb
l %r6,24(%r15)
.Lexit: br %r14
END(__mpn_mul_1)