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71 lines
1.8 KiB
ArmAsm
71 lines
1.8 KiB
ArmAsm
! SPARC v9 32-bit __mpn_mul_1 -- Multiply a limb vector with a single
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! limb and store the product in a second limb vector.
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!
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! Copyright (C) 2013-2018 Free Software Foundation, Inc.
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! This file is part of the GNU C Library.
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! Contributed by David S. Miller <davem@davemloft.net>
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!
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! The GNU C Library is free software; you can redistribute it and/or
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! modify it under the terms of the GNU Lesser General Public
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! License as published by the Free Software Foundation; either
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! version 2.1 of the License, or (at your option) any later version.
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!
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! The GNU C Library 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 GNU
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! Lesser General Public License for more details.
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!
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! You should have received a copy of the GNU Lesser General Public
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! License along with the GNU C Library; if not, see
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! <http://www.gnu.org/licenses/>.
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#include <sysdep.h>
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#define res_ptr %o0
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#define s1_ptr %o1
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#define sz %o2
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#define s2_limb %o3
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#define carry %o5
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#define tmp1 %g1
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#define tmp2 %g2
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#define tmp3 %g3
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#define tmp4 %o4
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ENTRY(__mpn_mul_1)
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srl sz, 0, sz
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srl s2_limb, 0, s2_limb
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subcc sz, 1, sz
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be,pn %icc, .Lfinal_limb
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clr carry
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.Lloop:
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lduw [s1_ptr + 0x00], tmp1
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lduw [s1_ptr + 0x04], tmp2
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mulx tmp1, s2_limb, tmp3
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add s1_ptr, 8, s1_ptr
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mulx tmp2, s2_limb, tmp4
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sub sz, 2, sz
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add res_ptr, 8, res_ptr
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add carry, tmp3, tmp3
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stw tmp3, [res_ptr - 0x08]
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srlx tmp3, 32, carry
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add carry, tmp4, tmp4
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stw tmp4, [res_ptr - 0x04]
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brgz sz, .Lloop
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srlx tmp4, 32, carry
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brlz,pt sz, .Lfinish
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nop
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.Lfinal_limb:
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lduw [s1_ptr + 0x00], tmp1
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mulx tmp1, s2_limb, tmp3
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add carry, tmp3, tmp3
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stw tmp3, [res_ptr + 0x00]
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srlx tmp3, 32, carry
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.Lfinish:
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retl
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mov carry, %o0
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END(__mpn_mul_1)
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