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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
94 lines
3.8 KiB
NASM
94 lines
3.8 KiB
NASM
dnl ARM mpn_invert_limb -- Invert a normalized limb.
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dnl Copyright 2001, 2009, 2011, 2012 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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ASM_START()
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PROLOGUE(mpn_invert_limb)
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LEA( r2, approx_tab-512)
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mov r3, r0, lsr #23
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mov r3, r3, asl #1
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ldrh r3, [r3, r2]
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mov r1, r3, asl #17
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mul r12, r3, r3
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umull r3, r2, r12, r0
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sub r1, r1, r2, asl #1
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umull r3, r2, r1, r1
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umull r12, r3, r0, r3
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umull r2, r12, r0, r2
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adds r2, r2, r3
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adc r12, r12, #0
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rsb r1, r12, r1
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mvn r2, r2, lsr #30
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add r2, r2, r1, asl #2
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umull r12, r3, r0, r2
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adds r1, r12, r0
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adc r3, r3, r0
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rsb r0, r3, r2
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ret lr
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EPILOGUE()
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RODATA
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ALIGN(2)
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approx_tab:
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.short 0xffc0,0xfec0,0xfdc0,0xfcc0,0xfbc0,0xfac0,0xfa00,0xf900
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.short 0xf800,0xf700,0xf640,0xf540,0xf440,0xf380,0xf280,0xf180
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.short 0xf0c0,0xefc0,0xef00,0xee00,0xed40,0xec40,0xeb80,0xeac0
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.short 0xe9c0,0xe900,0xe840,0xe740,0xe680,0xe5c0,0xe500,0xe400
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.short 0xe340,0xe280,0xe1c0,0xe100,0xe040,0xdf80,0xdec0,0xde00
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.short 0xdd40,0xdc80,0xdbc0,0xdb00,0xda40,0xd980,0xd8c0,0xd800
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.short 0xd740,0xd680,0xd600,0xd540,0xd480,0xd3c0,0xd340,0xd280
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.short 0xd1c0,0xd140,0xd080,0xcfc0,0xcf40,0xce80,0xcdc0,0xcd40
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.short 0xcc80,0xcc00,0xcb40,0xcac0,0xca00,0xc980,0xc8c0,0xc840
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.short 0xc780,0xc700,0xc640,0xc5c0,0xc540,0xc480,0xc400,0xc380
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.short 0xc2c0,0xc240,0xc1c0,0xc100,0xc080,0xc000,0xbf80,0xbec0
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.short 0xbe40,0xbdc0,0xbd40,0xbc80,0xbc00,0xbb80,0xbb00,0xba80
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.short 0xba00,0xb980,0xb900,0xb840,0xb7c0,0xb740,0xb6c0,0xb640
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.short 0xb5c0,0xb540,0xb4c0,0xb440,0xb3c0,0xb340,0xb2c0,0xb240
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.short 0xb1c0,0xb140,0xb0c0,0xb080,0xb000,0xaf80,0xaf00,0xae80
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.short 0xae00,0xad80,0xad40,0xacc0,0xac40,0xabc0,0xab40,0xaac0
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.short 0xaa80,0xaa00,0xa980,0xa900,0xa8c0,0xa840,0xa7c0,0xa740
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.short 0xa700,0xa680,0xa600,0xa5c0,0xa540,0xa4c0,0xa480,0xa400
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.short 0xa380,0xa340,0xa2c0,0xa240,0xa200,0xa180,0xa140,0xa0c0
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.short 0xa080,0xa000,0x9f80,0x9f40,0x9ec0,0x9e80,0x9e00,0x9dc0
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.short 0x9d40,0x9d00,0x9c80,0x9c40,0x9bc0,0x9b80,0x9b00,0x9ac0
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.short 0x9a40,0x9a00,0x9980,0x9940,0x98c0,0x9880,0x9840,0x97c0
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.short 0x9780,0x9700,0x96c0,0x9680,0x9600,0x95c0,0x9580,0x9500
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.short 0x94c0,0x9440,0x9400,0x93c0,0x9340,0x9300,0x92c0,0x9240
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.short 0x9200,0x91c0,0x9180,0x9100,0x90c0,0x9080,0x9000,0x8fc0
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.short 0x8f80,0x8f40,0x8ec0,0x8e80,0x8e40,0x8e00,0x8d80,0x8d40
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.short 0x8d00,0x8cc0,0x8c80,0x8c00,0x8bc0,0x8b80,0x8b40,0x8b00
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.short 0x8a80,0x8a40,0x8a00,0x89c0,0x8980,0x8940,0x88c0,0x8880
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.short 0x8840,0x8800,0x87c0,0x8780,0x8740,0x8700,0x8680,0x8640
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.short 0x8600,0x85c0,0x8580,0x8540,0x8500,0x84c0,0x8480,0x8440
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.short 0x8400,0x8380,0x8340,0x8300,0x82c0,0x8280,0x8240,0x8200
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.short 0x81c0,0x8180,0x8140,0x8100,0x80c0,0x8080,0x8040,0x8000
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ASM_END()
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