87 lines
2.5 KiB
ArmAsm
87 lines
2.5 KiB
ArmAsm
! SPARC v9 __mpn_mul_1 -- Multiply a limb vector with a single limb and
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! store the product in a second limb vector.
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! Copyright (C) 1995, 1996 Free Software Foundation, Inc.
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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 Library General Public License as published by
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! the Free Software Foundation; either version 2 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 Library General Public
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! License for more details.
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! You should have received a copy of the GNU Library General Public License
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! along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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! MA 02111-1307, USA.
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! INPUT PARAMETERS
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! res_ptr o0
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! s1_ptr o1
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! size o2
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! s2_limb o3
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.section ".text"
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.align 4
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.global __mpn_mul_1
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.type __mpn_mul_1,#function
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.proc 016
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__mpn_mul_1:
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!#PROLOGUE# 0
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save %sp,-160,%sp
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!#PROLOGUE# 1
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sub %g0,%i2,%o7
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sllx %o7,3,%g5
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sub %i1,%g5,%o3
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sub %i0,%g5,%o4
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mov 0,%o0 ! zero cy_limb
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srl %i3,0,%o1 ! extract low 32 bits of s2_limb
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srlx %i3,32,%i3 ! extract high 32 bits of s2_limb
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mov 1,%o2
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sllx %o2,32,%o2 ! o2 = 0x100000000
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! hi !
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! mid-1 !
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! mid-2 !
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! lo !
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.Loop:
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sllx %o7,3,%g1
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ldx [%o3+%g1],%g5
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srl %g5,0,%i0 ! zero hi bits
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srlx %g5,32,%g5
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mulx %o1,%i0,%i4 ! lo product
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mulx %i3,%i0,%i1 ! mid-1 product
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mulx %o1,%g5,%l2 ! mid-2 product
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mulx %i3,%g5,%i5 ! hi product
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srlx %i4,32,%i0 ! extract high 32 bits of lo product...
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add %i1,%i0,%i1 ! ...and add it to the mid-1 product
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addcc %i1,%l2,%i1 ! add mid products
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mov 0,%l0 ! we need the carry from that add...
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movcs %xcc,%o2,%l0 ! ...compute it and...
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add %i5,%l0,%i5 ! ...add to bit 32 of the hi product
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sllx %i1,32,%i0 ! align low bits of mid product
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srl %i4,0,%g5 ! zero high 32 bits of lo product
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add %i0,%g5,%i0 ! combine into low 64 bits of result
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srlx %i1,32,%i1 ! extract high bits of mid product...
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add %i5,%i1,%i1 ! ...and add them to the high result
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addcc %i0,%o0,%i0 ! add cy_limb to low 64 bits of result
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mov 0,%g5
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movcs %xcc,1,%g5
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add %o7,1,%o7
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stx %i0,[%o4+%g1]
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brnz %o7,.Loop
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add %i1,%g5,%o0 ! compute new cy_limb
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mov %o0,%i0
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ret
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restore
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.LLfe1:
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.size __mpn_mul_1,.LLfe1-__mpn_mul_1
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