1dnl PPC32 mpn_bdiv_dbm1c. 2 3dnl Copyright 2008 Free Software Foundation, Inc. 4 5dnl This file is part of the GNU MP Library. 6 7dnl The GNU MP Library is free software; you can redistribute it and/or modify 8dnl it under the terms of the GNU Lesser General Public License as published 9dnl by the Free Software Foundation; either version 3 of the License, or (at 10dnl your option) any later version. 11 12dnl The GNU MP Library is distributed in the hope that it will be useful, but 13dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15dnl License for more details. 16 17dnl You should have received a copy of the GNU Lesser General Public License 18dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. 19 20include(`../config.m4') 21 22C cycles/limb 23C 603e: ? 24C 604e: ? 25C 75x (G3): ? 26C 7400,7410 (G4): 9.43 27C 744x,745x (G4+): 6.28 28C power4/ppc970: ? 29C power5: ? 30 31C TODO 32C * Nothing to do... 33 34C INPUT PARAMETERS 35define(`rp', `r3') 36define(`up', `r4') 37define(`n', `r5') 38define(`bd', `r6') 39define(`cy', `r7') 40 41ASM_START() 42PROLOGUE(mpn_bdiv_dbm1c) 43 lwz r0, 0(r4) 44 45 rlwinm. r12, r5, 0,30,31 46 cmplwi cr6, r12, 2 47 cmplwi cr7, r5, 4 48 addi r5, r5, 1 49 srwi r5, r5, 2 50 mtctr r5 51 beq cr0, L(b00) 52 blt cr6, L(b01) 53 beq cr6, L(b10) 54 55L(b11): mullw r5, r0, r6 56 mulhwu r12, r0, r6 57 lwz r0, 4(r4) 58 addi r4, r4, -12 59 addi r3, r3, -12 60 b L(3) 61 62L(b00): mullw r9, r0, r6 63 mulhwu r8, r0, r6 64 lwz r0, 4(r4) 65 addi r4, r4, -8 66 addi r3, r3, -8 67 b L(0) 68 69L(b01): mullw r5, r0, r6 70 mulhwu r12, r0, r6 71 addi r3, r3, -4 72 ble cr7, L(e1) 73 lwz r0, 4(r4) 74 addi r4, r4, -4 75 b L(1) 76 77L(b10): mullw r9, r0, r6 78 mulhwu r8, r0, r6 79 lwz r0, 4(r4) 80 ble cr7, L(e2) 81 82 ALIGN(16) 83L(top): mullw r5, r0, r6 84 mulhwu r12, r0, r6 85 subfc r11, r9, r7 86 lwz r0, 8(r4) 87 subfe r7, r8, r11 88 stw r11, 0(r3) 89L(1): mullw r9, r0, r6 90 mulhwu r8, r0, r6 91 subfc r11, r5, r7 92 lwz r0, 12(r4) 93 subfe r7, r12, r11 94 stw r11, 4(r3) 95L(0): mullw r5, r0, r6 96 mulhwu r12, r0, r6 97 subfc r11, r9, r7 98 lwz r0, 16(r4) 99 subfe r7, r8, r11 100 stw r11, 8(r3) 101L(3): mullw r9, r0, r6 102 mulhwu r8, r0, r6 103 subfc r11, r5, r7 104 lwz r0, 20(r4) 105 subfe r7, r12, r11 106 stw r11, 12(r3) 107 addi r4, r4, 16 108 addi r3, r3, 16 109 bdnz L(top) 110 111L(e2): mullw r5, r0, r6 112 mulhwu r12, r0, r6 113 subfc r11, r9, r7 114 subfe r7, r8, r11 115 stw r11, 0(r3) 116L(e1): subfc r11, r5, r7 117 stw r11, 4(r3) 118 subfe r3, r12, r11 119 blr 120EPILOGUE() 121