138 lines
3.1 KiB
NASM
138 lines
3.1 KiB
NASM
dnl SPARC mpn_mul_1 -- Multiply a limb vector with a limb and store
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dnl the result in a second limb vector.
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dnl Copyright 1992, 1993, 1994, 2000 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU Lesser General Public License as published
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dnl by the Free Software Foundation; either version 2.1 of the License, or (at
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dnl your option) any later version.
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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dnl License for more details.
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dnl You should have received a copy of the GNU Lesser General Public License
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dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write
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dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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dnl Boston, MA 02110-1301, USA.
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include(`../config.m4')
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C INPUT PARAMETERS
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C res_ptr o0
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C s1_ptr o1
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C size o2
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C s2_limb o3
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ASM_START()
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PROLOGUE(mpn_mul_1)
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C Make S1_PTR and RES_PTR point at the end of their blocks
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C and put (- 4 x SIZE) in index/loop counter.
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sll %o2,2,%o2
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add %o0,%o2,%o4 C RES_PTR in o4 since o0 is retval
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add %o1,%o2,%o1
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sub %g0,%o2,%o2
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cmp %o3,0xfff
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bgu L(large)
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nop
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ld [%o1+%o2],%o5
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mov 0,%o0
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b L(0)
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add %o4,-4,%o4
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L(loop0):
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st %g1,[%o4+%o2]
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L(0): wr %g0,%o3,%y
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sra %o5,31,%g2
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and %o3,%g2,%g2
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andcc %g1,0,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,%o5,%g1
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mulscc %g1,0,%g1
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sra %g1,20,%g4
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sll %g1,12,%g1
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rd %y,%g3
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srl %g3,20,%g3
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or %g1,%g3,%g1
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addcc %g1,%o0,%g1
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addx %g2,%g4,%o0 C add sign-compensation and cy to hi limb
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addcc %o2,4,%o2 C loop counter
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bne,a L(loop0)
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ld [%o1+%o2],%o5
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retl
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st %g1,[%o4+%o2]
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L(large):
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ld [%o1+%o2],%o5
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mov 0,%o0
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sra %o3,31,%g4 C g4 = mask of ones iff S2_LIMB < 0
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b L(1)
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add %o4,-4,%o4
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L(loop):
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st %g3,[%o4+%o2]
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L(1): wr %g0,%o5,%y
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and %o5,%g4,%g2 C g2 = S1_LIMB iff S2_LIMB < 0, else 0
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andcc %g0,%g0,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%o3,%g1
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mulscc %g1,%g0,%g1
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rd %y,%g3
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addcc %g3,%o0,%g3
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addx %g2,%g1,%o0 C add sign-compensation and cy to hi limb
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addcc %o2,4,%o2 C loop counter
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bne,a L(loop)
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ld [%o1+%o2],%o5
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retl
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st %g3,[%o4+%o2]
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EPILOGUE(mpn_mul_1)
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