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56 lines
1.8 KiB
ArmAsm
56 lines
1.8 KiB
ArmAsm
/* __mpn_mul_1 -- Multiply a limb vector with a limb and store
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the result in a second limb vector.
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Copyright (C) 2000-2018 Free Software Foundation, Inc.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not,
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see <http://www.gnu.org/licenses/>. */
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/*
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INPUT PARAMETERS
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res_ptr %r2
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s1_ptr %r3
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size %r4
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s2_limb %r5
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*/
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#include <sysdep.h>
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#include "asm-syntax.h"
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.text
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ENTRY(__mpn_mul_1)
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st %r6,24(%r15)
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cfi_offset (%r6, -72)
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slr %r6,%r6 # cy_limb = 0
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.L0: icm %r1,15,0(%r3) # get s1_ptr[i]
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mr %r0,%r5 # umul_ppmm(prod_high,prod_low,s1_ptr[j],s2_limb)
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jnm .L1
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alr %r0,%r5
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.L1: ltr %r5,%r5
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jnm .L2
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al %r0,0(%r3)
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.L2: alr %r1,%r6 # prod_low += cy_limb
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lr %r6,%r0 # cy_limb = prod_high
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brc 12,.L3
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ahi %r6,1 # + (prod_low < cy_limb)
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.L3: st %r1,0(%r2)
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la %r2,4(0,%r2)
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la %r3,4(0,%r3)
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brct %r4,.L0
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lr %r2,%r6 # return cy_limb
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l %r6,24(%r15)
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.Lexit: br %r14
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END(__mpn_mul_1)
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