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59 lines
1.6 KiB
ArmAsm
59 lines
1.6 KiB
ArmAsm
;! HP-PA __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
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;! store difference in a third limb vector.
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;! Copyright (C) 1992-2023 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 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. If not, see
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;! <https://www.gnu.org/licenses/>.
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;! INPUT PARAMETERS
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;! res_ptr gr26
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;! s1_ptr gr25
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;! s2_ptr gr24
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;! size gr23
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;! One might want to unroll this as for other processors, but it turns
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;! out that the data cache contention after a store makes such
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;! unrolling useless. We can't come under 5 cycles/limb anyway.
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.text
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.export __mpn_sub_n
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__mpn_sub_n:
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.proc
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.callinfo frame=0,no_calls
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.entry
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ldws,ma 4(%r25),%r21
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ldws,ma 4(%r24),%r20
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addib,= -1,%r23,L$end ;! check for (SIZE == 1)
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sub %r21,%r20,%r28 ;! subtract first limbs ignoring cy
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L$loop: ldws,ma 4(%r25),%r21
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ldws,ma 4(%r24),%r20
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stws,ma %r28,4(%r26)
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addib,<> -1,%r23,L$loop
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subb %r21,%r20,%r28
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L$end: stws %r28,0(%r26)
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addc %r0,%r0,%r28
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bv 0(%r2)
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subi 1,%r28,%r28
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.exit
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.procend
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