| dnl PPC32 mpn_bdiv_dbm1c. |
| |
| dnl Copyright 2008 Free Software Foundation, 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 603e: ? |
| C 604e: ? |
| C 75x (G3): ? |
| C 7400,7410 (G4): 9.43 |
| C 744x,745x (G4+): 6.28 |
| C power4/ppc970: ? |
| C power5: ? |
| |
| C TODO |
| C * Nothing to do... |
| |
| C INPUT PARAMETERS |
| define(`rp', `r3') |
| define(`up', `r4') |
| define(`n', `r5') |
| define(`bd', `r6') |
| define(`cy', `r7') |
| |
| ASM_START() |
| PROLOGUE(mpn_bdiv_dbm1c) |
| lwz r0, 0(r4) |
| |
| rlwinm. r12, r5, 0,30,31 |
| cmplwi cr6, r12, 2 |
| cmplwi cr7, r5, 4 |
| addi r5, r5, 1 |
| srwi r5, r5, 2 |
| mtctr r5 |
| beq cr0, L(b00) |
| blt cr6, L(b01) |
| beq cr6, L(b10) |
| |
| L(b11): mullw r5, r0, r6 |
| mulhwu r12, r0, r6 |
| lwz r0, 4(r4) |
| addi r4, r4, -12 |
| addi r3, r3, -12 |
| b L(3) |
| |
| L(b00): mullw r9, r0, r6 |
| mulhwu r8, r0, r6 |
| lwz r0, 4(r4) |
| addi r4, r4, -8 |
| addi r3, r3, -8 |
| b L(0) |
| |
| L(b01): mullw r5, r0, r6 |
| mulhwu r12, r0, r6 |
| addi r3, r3, -4 |
| ble cr7, L(e1) |
| lwz r0, 4(r4) |
| addi r4, r4, -4 |
| b L(1) |
| |
| L(b10): mullw r9, r0, r6 |
| mulhwu r8, r0, r6 |
| lwz r0, 4(r4) |
| ble cr7, L(e2) |
| |
| ALIGN(16) |
| L(top): mullw r5, r0, r6 |
| mulhwu r12, r0, r6 |
| subfc r11, r9, r7 |
| lwz r0, 8(r4) |
| subfe r7, r8, r11 |
| stw r11, 0(r3) |
| L(1): mullw r9, r0, r6 |
| mulhwu r8, r0, r6 |
| subfc r11, r5, r7 |
| lwz r0, 12(r4) |
| subfe r7, r12, r11 |
| stw r11, 4(r3) |
| L(0): mullw r5, r0, r6 |
| mulhwu r12, r0, r6 |
| subfc r11, r9, r7 |
| lwz r0, 16(r4) |
| subfe r7, r8, r11 |
| stw r11, 8(r3) |
| L(3): mullw r9, r0, r6 |
| mulhwu r8, r0, r6 |
| subfc r11, r5, r7 |
| lwz r0, 20(r4) |
| subfe r7, r12, r11 |
| stw r11, 12(r3) |
| addi r4, r4, 16 |
| addi r3, r3, 16 |
| bdnz L(top) |
| |
| L(e2): mullw r5, r0, r6 |
| mulhwu r12, r0, r6 |
| subfc r11, r9, r7 |
| subfe r7, r8, r11 |
| stw r11, 0(r3) |
| L(e1): subfc r11, r5, r7 |
| stw r11, 4(r3) |
| subfe r3, r12, r11 |
| blr |
| EPILOGUE() |
