1 dnl PowerPC-32 mpn_submul_1 -- Multiply a limb vector with a limb and subtract
2 dnl the result from a second limb vector.
4 dnl Copyright 1995, 1997, 1998, 2000, 2002, 2005 Free Software Foundation,
7 dnl This file is part of the GNU MP Library.
9 dnl The GNU MP Library is free software; you can redistribute it and/or modify
10 dnl it under the terms of the GNU Lesser General Public License as published
11 dnl by the Free Software Foundation; either version 3 of the License, or (at
12 dnl your option) any later version.
14 dnl The GNU MP Library is distributed in the hope that it will be useful, but
15 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17 dnl License for more details.
19 dnl You should have received a copy of the GNU Lesser General Public License
20 dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
22 include(`../config.m4')
28 C 7400,7410 (G4): 9.3-15
29 C 744x,745x (G4+): 10.5
39 C This is optimized for the PPC604. See addmul_1.asm for additional comments.
42 PROLOGUE(mpn_submul_1)
43 cmpwi cr0,r5,9 C more than 9 limbs?
44 bgt cr0,L(big) C branch if more than 9 limbs
52 addc r7,r7,r8 C invert cy (r7 is junk)
64 addc r7,r7,r8 C invert cy (r7 is junk)
70 L(big): stmw r30,-32(r1)
92 adde r8,r8,r0 C add cy_limb
104 addze r0,r0 C new cy_limb
113 subfe r11,r11,r11 C invert ...
114 addic r11,r11,1 C ... carry
124 adde r8,r8,r0 C add cy_limb
127 addze r0,r0 C new cy_limb
136 EPILOGUE(mpn_submul_1)