[project @ 2000-08-18 15:44:28 by simonmar]

[ghc-hetmet.git] / ghc / rts / gmp / mpn / alpha / add_n.asm

diff --git a/ghc/rts/gmp/mpn/alpha/add_n.asm b/ghc/rts/gmp/mpn/alpha/add_n.asm
new file mode 100644 (file)
index 0000000..08d6a9f
--- /dev/null
+++ b/ghc/rts/gmp/mpn/alpha/add_n.asm
@@ -0,0 +1,114 @@
+dnl  Alpha mpn_add_n -- Add two limb vectors of the same length > 0 and
+dnl  store sum in a third limb vector.
+
+dnl  Copyright (C) 1995, 2000 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 by
+dnl  the Free Software Foundation; either version 2.1 of the License, or (at your
+dnl  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; see the file COPYING.LIB.  If not, write to
+dnl  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+dnl  MA 02111-1307, USA.
+
+include(`../config.m4')
+
+dnl  INPUT PARAMETERS
+dnl  res_ptr   r16
+dnl  s1_ptr    r17
+dnl  s2_ptr    r18
+dnl  size      r19
+
+ASM_START()
+PROLOGUE(mpn_add_n)
+       ldq     r3,0(r17)
+       ldq     r4,0(r18)
+
+       subq    r19,1,r19
+       and     r19,4-1,r2      C number of limbs in first loop
+       bis     r31,r31,r0
+       beq     r2,$L0          C if multiple of 4 limbs, skip first loop
+
+       subq    r19,r2,r19
+
+$Loop0:        subq    r2,1,r2
+       ldq     r5,8(r17)
+       addq    r4,r0,r4
+       ldq     r6,8(r18)
+       cmpult  r4,r0,r1
+       addq    r3,r4,r4
+       cmpult  r4,r3,r0
+       stq     r4,0(r16)
+       bis     r0,r1,r0
+
+       addq    r17,8,r17
+       addq    r18,8,r18
+       bis     r5,r5,r3
+       bis     r6,r6,r4
+       addq    r16,8,r16
+       bne     r2,$Loop0
+
+$L0:   beq     r19,$Lend
+
+       ALIGN(8)
+$Loop: subq    r19,4,r19
+
+       ldq     r5,8(r17)
+       addq    r4,r0,r4
+       ldq     r6,8(r18)
+       cmpult  r4,r0,r1
+       addq    r3,r4,r4
+       cmpult  r4,r3,r0
+       stq     r4,0(r16)
+       bis     r0,r1,r0
+
+       ldq     r3,16(r17)
+       addq    r6,r0,r6
+       ldq     r4,16(r18)
+       cmpult  r6,r0,r1
+       addq    r5,r6,r6
+       cmpult  r6,r5,r0
+       stq     r6,8(r16)
+       bis     r0,r1,r0
+
+       ldq     r5,24(r17)
+       addq    r4,r0,r4
+       ldq     r6,24(r18)
+       cmpult  r4,r0,r1
+       addq    r3,r4,r4
+       cmpult  r4,r3,r0
+       stq     r4,16(r16)
+       bis     r0,r1,r0
+
+       ldq     r3,32(r17)
+       addq    r6,r0,r6
+       ldq     r4,32(r18)
+       cmpult  r6,r0,r1
+       addq    r5,r6,r6
+       cmpult  r6,r5,r0
+       stq     r6,24(r16)
+       bis     r0,r1,r0
+
+       addq    r17,32,r17
+       addq    r18,32,r18
+       addq    r16,32,r16
+       bne     r19,$Loop
+
+$Lend: addq    r4,r0,r4
+       cmpult  r4,r0,r1
+       addq    r3,r4,r4
+       cmpult  r4,r3,r0
+       stq     r4,0(r16)
+       bis     r0,r1,r0
+       ret     r31,(r26),1
+EPILOGUE(mpn_add_n)
+ASM_END()