diff options
Diffstat (limited to 'sysdeps/s390/mul_1.S')
| -rw-r--r-- | sysdeps/s390/mul_1.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/s390/mul_1.S b/sysdeps/s390/mul_1.S new file mode 100644 index 0000000000..1804114741 --- /dev/null +++ b/sysdeps/s390/mul_1.S @@ -0,0 +1,55 @@ +/* i80386 __mpn_mul_1 -- Multiply a limb vector with a limb and store + the result in a second limb vector. + Copyright (C) 2000 Free Software Foundation, Inc. + Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). + 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 Library General Public License as published by + the Free Software Foundation; either version 2 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 Library General Public + License for more details. + + You should have received a copy of the GNU Library General Public License + along with the GNU MP Library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, + MA 02111-1307, USA. */ + +/* + 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) + 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) |