+dnl PowerPC-64 mpn_submul_1 -- Multiply a limb vector with a limb and subtract
+dnl the result from a second limb vector.
+
+dnl Copyright 1999, 2000, 2001, 2003, 2004, 2005, 2006 Free Software
+dnl 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 POWER3/PPC630: 6-18
+C POWER4/PPC970: 10
+C POWER5: 10.5
+
+C INPUT PARAMETERS
+define(`rp', `r3')
+define(`up', `r4')
+define(`n', `r5')
+define(`vl', `r6')
+define(`cy', `r7')
+
+ASM_START()
+PROLOGUE(mpn_submul_1)
+ li cy, 0 C cy_limb = 0
+
+PROLOGUE(mpn_submul_1c)
+ mtctr n
+ addic r0, r0, 0
+ addi rp, rp, -8
+ ALIGN(16)
+L(top):
+ ld r0, 0(up)
+ ld r10, 8(rp)
+ mulld r9, r0, vl
+ mulhdu r5, r0, vl
+ adde r9, r9, cy
+ addi up, up, 8
+ addze cy, r5
+ subf r12, r9, r10
+ not r0, r10
+ addc r11, r9, r0 C inverted carry from subf
+ stdu r12, 8(rp)
+ bdnz L(top)
+
+ addze r3, cy
+ blr
+EPILOGUE(mpn_submul_1)
+EPILOGUE(mpn_submul_1c)