popcount.asm
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上传日期:2022-08-06
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- dnl IA-64 mpn_popcount -- mpn population count.
- dnl Copyright 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation,
- dnl Inc.
- dnl This file is part of the GNU MP Library.
- dnl The GNU MP Library is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU Lesser General Public License as published
- dnl by the Free Software Foundation; either version 3 of the License, or (at
- dnl your option) any later version.
- dnl The GNU MP Library is distributed in the hope that it will be useful, but
- dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- dnl License for more details.
- dnl You should have received a copy of the GNU Lesser General Public License
- dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
- include(`../config.m4')
- C cycles/limb
- C Itanium: 1.5
- C Itanium 2: 1
- C INPUT PARAMETERS
- define(`up', `r32')
- define(`n', `r33')
- define(`u0',`r16') define(`u1',`r17') define(`u2',`r18') define(`u3',`r19')
- define(`c0',`r28') define(`c1',`r29') define(`c2',`r30') define(`c3',`r31')
- define(`s',`r8')
- ASM_START()
- PROLOGUE(mpn_popcount)
- .prologue
- ifdef(`HAVE_ABI_32',
- ` addp4 up = 0, up C M I
- zxt4 n = n C I
- ;;
- ')
- {.mmi; add r9 = 512, up C prefetch pointer M I
- ld8 r10 = [up], 8 C load first limb M01
- mov.i r2 = ar.lc C save ar.lc I0
- }{.mmi; and r14 = 3, n C M I
- cmp.lt p15, p14 = 4, n C small count? M I
- add n = -5, n C M I
- ;;
- }{.mmi; cmp.eq p6, p0 = 1, r14 C M I
- cmp.eq p7, p0 = 2, r14 C M I
- cmp.eq p8, p0 = 3, r14 C M I
- }{.bbb
- (p6) br.dptk .Lb01 C B
- (p7) br.dptk .Lb10 C B
- (p8) br.dptk .Lb11 C B
- }
- .Lb00: ld8 u1 = [up], 8 C M01
- shr.u n = n, 2 C I0
- mov s = 0 C M I
- ;;
- ld8 u2 = [up], 8 C M01
- popcnt c0 = r10 C I0
- mov.i ar.lc = n C I0
- ;;
- ld8 u3 = [up], 8 C M01
- popcnt c1 = u1 C I0
- (p15) br.cond.dptk .grt4 C B
- ;;
- nop.m 0 C -
- nop.m 0 C -
- popcnt c2 = u2 C I0
- ;;
- mov s = c0 C M I
- popcnt c3 = u3 C I0
- br .Lcj4 C B
- .grt4: ld8 u0 = [up], 8 C M01
- popcnt c2 = u2 C I0
- br .LL00 C B
- .Lb01:
- popcnt s = r10 C I0
- (p14) br.ret.sptk.many b0 C B
- .grt1: ld8 u0 = [up], 8 C M01
- shr.u n = n, 2 C I0
- ;;
- ld8 u1 = [up], 8 C M01
- mov.i ar.lc = n C I0
- ;;
- ld8 u2 = [up], 8 C M01
- popcnt c0 = u0 C I0
- mov c3 = 0 C I0
- ;;
- ld8 u3 = [up], 8 C M01
- popcnt c1 = u1 C I0
- br.cloop.dptk .Loop C B
- br .Lend C B
- .Lb10: ld8 u3 = [up], 8 C M01
- shr.u n = n, 2 C I0
- (p15) br.cond.dptk .grt2 C B
- popcnt s = r10 C I0
- ;;
- popcnt c3 = u3 C I0
- br .Lcj2 C B
- .grt2: ld8 u0 = [up], 8 C M01
- mov.i ar.lc = n C I0
- popcnt c2 = r10 C I0
- ;;
- ld8 u1 = [up], 8 C M01
- popcnt c3 = u3 C I0
- mov s = 0 C M I
- ;;
- ld8 u2 = [up], 8 C M01
- popcnt c0 = u0 C I0
- br .LL10 C B
- .Lb11: ld8 u2 = [up], 8 C M01
- shr.u n = n, 2 C I0
- mov s = 0 C M I
- ;;
- ld8 u3 = [up], 8 C M01
- popcnt s = r10 C I0
- (p15) br.cond.dptk .grt3 C B
- popcnt c2 = u2 C I0
- ;;
- popcnt c3 = u3 C I0
- br .Lcj3 C B
- .grt3: ld8 u0 = [up], 8 C M01
- popcnt c2 = u2 C I0
- mov.i ar.lc = n C I0
- mov c1 = 0
- ;;
- ld8 u1 = [up], 8 C M01
- popcnt c3 = u3 C I0
- br .LL11 C B
- .Loop: ld8 u0 = [up], 8 C M01
- popcnt c2 = u2 C I0
- add s = s, c3 C M I
- ;;
- .LL00: ld8 u1 = [up], 8 C M01
- popcnt c3 = u3 C I0
- add s = s, c0 C M I
- ;;
- .LL11: ld8 u2 = [up], 8 C M01
- popcnt c0 = u0 C I0
- add s = s, c1 C M I
- ;;
- .LL10: ld8 u3 = [up], 8 C M01
- popcnt c1 = u1 C I0
- add s = s, c2 C M I
- lfetch [r9], 32 C M01
- nop.m 0 C -
- br.cloop.dptk .Loop C B
- ;;
- .Lend: popcnt c2 = u2 C I0
- add s = s, c3 C M I
- ;;
- popcnt c3 = u3 C I0
- add s = s, c0 C M I
- ;;
- .Lcj4: add s = s, c1 C M I
- ;;
- .Lcj3: add s = s, c2 C M I
- ;;
- .Lcj2: add s = s, c3 C M I
- mov.i ar.lc = r2 C I0
- br.ret.sptk.many b0 C B
- EPILOGUE()
- ASM_END()