1dnl PPC64 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 POWER3/PPC630: 6-18 24C POWER4/PPC970: 8.5 25C POWER5: ? 26 27C TODO 28C * Nothing to do... 29 30C INPUT PARAMETERS 31define(`rp', `r3') 32define(`up', `r4') 33define(`n', `r5') 34define(`bd', `r6') 35define(`cy', `r7') 36 37ASM_START() 38PROLOGUE(mpn_bdiv_dbm1c) 39 ld r0, 0(r4) 40 41 rldicl. r12, r5, 0,62 42 cmpldi cr6, r12, 2 43 cmpldi cr7, r5, 4 44 addi r5, r5, 1 45 srwi r5, r5, 2 46 mtctr r5 47 beq cr0, L(b00) 48 blt cr6, L(b01) 49 beq cr6, L(b10) 50 51L(b11): mulld r5, r0, r6 52 mulhdu r12, r0, r6 53 ld r0, 8(r4) 54 addi r4, r4, -24 55 addi r3, r3, -24 56 b L(3) 57 58L(b00): mulld r9, r0, r6 59 mulhdu r8, r0, r6 60 ld r0, 8(r4) 61 addi r4, r4, -16 62 addi r3, r3, -16 63 b L(0) 64 65L(b01): mulld r5, r0, r6 66 mulhdu r12, r0, r6 67 addi r3, r3, -8 68 ble cr7, L(e1) 69 ld r0, 8(r4) 70 addi r4, r4, -8 71 b L(1) 72 73L(b10): mulld r9, r0, r6 74 mulhdu r8, r0, r6 75 ld r0, 8(r4) 76 ble cr7, L(e2) 77 78 ALIGN(16) 79L(top): mulld r5, r0, r6 80 mulhdu r12, r0, r6 81 subfc r11, r9, r7 82 ld r0, 16(r4) 83 subfe r7, r8, r11 84 std r11, 0(r3) 85L(1): mulld r9, r0, r6 86 mulhdu r8, r0, r6 87 subfc r11, r5, r7 88 ld r0, 24(r4) 89 subfe r7, r12, r11 90 std r11, 8(r3) 91L(0): mulld r5, r0, r6 92 mulhdu r12, r0, r6 93 subfc r11, r9, r7 94 ld r0, 32(r4) 95 subfe r7, r8, r11 96 std r11, 16(r3) 97L(3): mulld r9, r0, r6 98 mulhdu r8, r0, r6 99 subfc r11, r5, r7 100 ld r0, 40(r4) 101 subfe r7, r12, r11 102 std r11, 24(r3) 103 addi r4, r4, 32 104 addi r3, r3, 32 105 bdnz L(top) 106 107L(e2): mulld r5, r0, r6 108 mulhdu r12, r0, r6 109 subfc r11, r9, r7 110 subfe r7, r8, r11 111 std r11, 0(r3) 112L(e1): subfc r11, r5, r7 113 std r11, 8(r3) 114 subfe r3, r12, r11 115 blr 116EPILOGUE() 117