1dnl ARM mpn_addmul_1 and mpn_submul_1. 2 3dnl Copyright 1998, 2000, 2001, 2003, 2012 Free Software Foundation, Inc. 4 5dnl This file is part of the GNU MP Library. 6dnl 7dnl The GNU MP Library is free software; you can redistribute it and/or modify 8dnl it under the terms of either: 9dnl 10dnl * the GNU Lesser General Public License as published by the Free 11dnl Software Foundation; either version 3 of the License, or (at your 12dnl option) any later version. 13dnl 14dnl or 15dnl 16dnl * the GNU General Public License as published by the Free Software 17dnl Foundation; either version 2 of the License, or (at your option) any 18dnl later version. 19dnl 20dnl or both in parallel, as here. 21dnl 22dnl The GNU MP Library is distributed in the hope that it will be useful, but 23dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 24dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 25dnl for more details. 26dnl 27dnl You should have received copies of the GNU General Public License and the 28dnl GNU Lesser General Public License along with the GNU MP Library. If not, 29dnl see https://www.gnu.org/licenses/. 30 31include(`../config.m4') 32 33C cycles/limb 34C StrongARM: ? 35C XScale ? 36C Cortex-A7 ? 37C Cortex-A8 ? 38C Cortex-A9 5.25 39C Cortex-A15 4 40 41define(`rp', `r0') 42define(`up', `r1') 43define(`n', `r2') 44define(`vl', `r3') 45define(`rl', `r12') 46define(`ul', `r6') 47define(`r', `lr') 48 49ifdef(`OPERATION_addmul_1', ` 50 define(`ADDSUB', adds) 51 define(`ADDSUBC', adcs) 52 define(`CLRRCY', `mov $1, #0 53 adds r0, r0, #0') 54 define(`RETVAL', `adc r0, r4, #0') 55 define(`func', mpn_addmul_1)') 56ifdef(`OPERATION_submul_1', ` 57 define(`ADDSUB', subs) 58 define(`ADDSUBC', sbcs) 59 define(`CLRRCY', `subs $1, r0, r0') 60 define(`RETVAL', `sbc r0, r0, r0 61 sub r0, $1, r0') 62 define(`func', mpn_submul_1)') 63 64MULFUNC_PROLOGUE(mpn_addmul_1 mpn_submul_1) 65 66ASM_START() 67PROLOGUE(func) 68 stmfd sp!, { r4-r6, lr } 69 CLRRCY( r4) 70 tst n, #1 71 beq L(skip1) 72 ldr ul, [up], #4 73 ldr rl, [rp, #0] 74 umull r5, r4, ul, vl 75 ADDSUB r, rl, r5 76 str r, [rp], #4 77L(skip1): 78 tst n, #2 79 beq L(skip2) 80 ldr ul, [up], #4 81 ldr rl, [rp, #0] 82 mov r5, #0 83 umlal r4, r5, ul, vl 84 ldr ul, [up], #4 85 ADDSUBC r, rl, r4 86 ldr rl, [rp, #4] 87 mov r4, #0 88 umlal r5, r4, ul, vl 89 str r, [rp], #4 90 ADDSUBC r, rl, r5 91 str r, [rp], #4 92L(skip2): 93 bics n, n, #3 94 beq L(rtn) 95 96 ldr ul, [up], #4 97 ldr rl, [rp, #0] 98 mov r5, #0 99 umlal r4, r5, ul, vl 100 b L(in) 101 102L(top): ldr ul, [up], #4 103 ADDSUBC r, rl, r5 104 ldr rl, [rp, #4] 105 mov r5, #0 106 umlal r4, r5, ul, vl 107 str r, [rp], #4 108L(in): ldr ul, [up], #4 109 ADDSUBC r, rl, r4 110 ldr rl, [rp, #4] 111 mov r4, #0 112 umlal r5, r4, ul, vl 113 str r, [rp], #4 114 ldr ul, [up], #4 115 ADDSUBC r, rl, r5 116 ldr rl, [rp, #4] 117 mov r5, #0 118 umlal r4, r5, ul, vl 119 str r, [rp], #4 120 ldr ul, [up], #4 121 ADDSUBC r, rl, r4 122 ldr rl, [rp, #4] 123 mov r4, #0 124 umlal r5, r4, ul, vl 125 sub n, n, #4 126 tst n, n 127 str r, [rp], #4 128 bne L(top) 129 130 ADDSUBC r, rl, r5 131 str r, [rp] 132 133L(rtn): RETVAL( r4) 134 ldmfd sp!, { r4-r6, pc } 135EPILOGUE() 136