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f133d007f9
Old version was from 2012-05-06, 6.1.2 is from 2016-12-16 A lot of support for newer processors and speedups since then See gmp/NEWS for details
143 lines
2.9 KiB
NASM
143 lines
2.9 KiB
NASM
dnl SPARC v9 mpn_rshift
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dnl Contributed to the GNU project by David Miller.
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dnl Copyright 2013 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl
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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 either:
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dnl
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dnl * the GNU Lesser General Public License as published by the Free
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dnl Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl or
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dnl
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dnl * the GNU General Public License as published by the Free Software
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dnl Foundation; either version 2 of the License, or (at your option) any
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dnl later version.
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dnl
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dnl or both in parallel, as here.
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dnl
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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 General Public License
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dnl for more details.
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dnl
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dnl You should have received copies of the GNU General Public License and the
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dnl GNU Lesser General Public License along with the GNU MP Library. If not,
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dnl see https://www.gnu.org/licenses/.
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include(`../config.m4')
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C cycles/limb
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C UltraSPARC 1&2: 2
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C UltraSPARC 3: 2.5
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C UltraSPARC T1: 17.5
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C UltraSPARC T3: 8
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C UltraSPARC T4: 3
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C INPUT PARAMETERS
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define(`rp', `%i0')
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define(`up', `%i1')
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define(`n', `%i2')
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define(`cnt', `%i3')
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define(`tcnt', `%i4')
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define(`retval', `%i5')
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define(`u0', `%l0')
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define(`u1', `%l1')
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define(`r0', `%l6')
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define(`r1', `%l7')
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define(`u0_off', `%o0')
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define(`u1_off', `%o1')
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define(`r0_off', `%o2')
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define(`r1_off', `%o3')
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ASM_START()
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REGISTER(%g2,#scratch)
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REGISTER(%g3,#scratch)
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PROLOGUE(mpn_rshift)
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save %sp, -176, %sp
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sllx n, 3, n
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sub %g0, cnt, tcnt
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add up, n, up
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add rp, n, rp
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neg n, n
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sub up, (2 * 8), u0_off
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sub rp, (5 * 8), r0_off
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ldx [n + up], u1 C WAS: up + 0
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sub u0_off, (1 * 8), u1_off
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sub r0_off, (1 * 8), r1_off
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subcc n, -(3 * 8), n
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sllx u1, tcnt, retval
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bg,pn %xcc, L(end12)
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srlx u1, cnt, %l3
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ldx [n + u0_off], u0 C WAS: up + 0
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subcc n, -(2 * 8), n
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ldx [n + u1_off], u1 C WAS: up + 8
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bg,pn %xcc, L(end34)
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sllx u0, tcnt, %l4
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b,a L(top)
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ALIGN(16)
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L(top):
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srlx u0, cnt, %l2
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or %l3, %l4, r0
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ldx [n + u0_off], u0 C WAS: up + 0
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sllx u1, tcnt, %l5
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stx r0, [n + r0_off] C WAS: rp + 0
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subcc n, -(2 * 8), n
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srlx u1, cnt, %l3
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or %l2, %l5, r1
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ldx [n + u1_off], u1 C WAS: up + 8
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sllx u0, tcnt, %l4
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ble,pt %xcc, L(top)
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stx r1, [n + r1_off] C WAS: rp + 8
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L(end34):
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srlx u0, cnt, %l2
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or %l3, %l4, r0
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sllx u1, tcnt, %l5
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stx r0, [n + r0_off] C WAS: rp + 0
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or %l2, %l5, r1
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sub n, -(2 * 8), %o5
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srlx u1, cnt, %l3
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stx r1, [%o5 + r1_off] C WAS: rp + 8
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L(end12):
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andcc n, 8, %g0
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bz,pn %xcc, L(done)
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nop
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ldx [n + u0_off], u1
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sllx u1, tcnt, %l4
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or %l3, %l4, r0
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stx r0, [r0_off + 24]
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srlx u1, cnt, %l3
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L(done):
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stx %l3, [r0_off + 32]
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ret
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restore retval, 0, %o0
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EPILOGUE()
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