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113 lines
2.7 KiB
ArmAsm
113 lines
2.7 KiB
ArmAsm
/* SPARC v8 __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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*
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* Copyright (C) 1992, 1994, 1995, 1998,
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* 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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* Note: This code is heavily based on the GNU MP Library.
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* Actually it's the same code with only minor changes in the
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* way the data is stored; this is to support the abstraction
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* of an optional secure memory allocation which may be used
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* to avoid revealing of sensitive data due to paging etc.
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* The GNU MP Library itself is published under the LGPL;
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* however I decided to publish this code under the plain GPL.
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*/
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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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#include "sysdep.h"
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.text
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.align 8
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.global C_SYMBOL_NAME(mpihelp_mul_1)
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C_SYMBOL_NAME(mpihelp_mul_1):
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sll %o2,4,%g1
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and %g1,(4-1)<<4,%g1
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#if PIC
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mov %o7,%g4 ! Save return address register
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call 1f
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add %o7,LL-1f,%g3
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1: mov %g4,%o7 ! Restore return address register
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#else
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sethi %hi(LL),%g3
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or %g3,%lo(LL),%g3
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#endif
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jmp %g3+%g1
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ld [%o1+0],%o4 ! 1
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LL:
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LL00: add %o0,-4,%o0
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add %o1,-4,%o1
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b Loop00 /* 4, 8, 12, ... */
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orcc %g0,%g0,%g2
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LL01: b Loop01 /* 1, 5, 9, ... */
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orcc %g0,%g0,%g2
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nop
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nop
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LL10: add %o0,-12,%o0 /* 2, 6, 10, ... */
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add %o1,4,%o1
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b Loop10
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orcc %g0,%g0,%g2
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nop
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LL11: add %o0,-8,%o0 /* 3, 7, 11, ... */
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add %o1,-8,%o1
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b Loop11
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orcc %g0,%g0,%g2
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Loop: addcc %g3,%g2,%g3 ! 1
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ld [%o1+4],%o4 ! 2
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st %g3,[%o0+0] ! 1
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rd %y,%g2 ! 1
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Loop00: umul %o4,%o3,%g3 ! 2
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addxcc %g3,%g2,%g3 ! 2
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ld [%o1+8],%o4 ! 3
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st %g3,[%o0+4] ! 2
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rd %y,%g2 ! 2
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Loop11: umul %o4,%o3,%g3 ! 3
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addxcc %g3,%g2,%g3 ! 3
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ld [%o1+12],%o4 ! 4
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add %o1,16,%o1
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st %g3,[%o0+8] ! 3
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rd %y,%g2 ! 3
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Loop10: umul %o4,%o3,%g3 ! 4
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addxcc %g3,%g2,%g3 ! 4
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ld [%o1+0],%o4 ! 1
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st %g3,[%o0+12] ! 4
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add %o0,16,%o0
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rd %y,%g2 ! 4
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addx %g0,%g2,%g2
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Loop01: addcc %o2,-4,%o2
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bg Loop
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umul %o4,%o3,%g3 ! 1
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addcc %g3,%g2,%g3 ! 4
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st %g3,[%o0+0] ! 4
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rd %y,%g2 ! 4
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retl
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addx %g0,%g2,%o0
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