Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpn / alpha / rshift.asm

diff --git a/gmp/mpn/alpha/rshift.asm b/gmp/mpn/alpha/rshift.asm
new file mode 100644 (file)
index 0000000..ccedff8
--- /dev/null
+++ b/gmp/mpn/alpha/rshift.asm
@@ -0,0 +1,95 @@
+dnl  Alpha mpn_rshift -- Shift a number right.
+
+dnl  Copyright 1994, 1995, 2000, 2002 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 EV4:     4.75
+C EV5:     3.75
+C EV6:     2
+
+C  INPUT PARAMETERS
+C  rp  r16
+C  up  r17
+C  n   r18
+C  cnt r19
+
+
+ASM_START()
+PROLOGUE(mpn_rshift)
+       ldq     r4,0(r17)       C load first limb
+       addq    r17,8,r17
+       subq    r31,r19,r7
+       subq    r18,1,r18
+       and     r18,4-1,r20     C number of limbs in first loop
+       sll     r4,r7,r0        C compute function result
+
+       beq     r20,$L0
+       subq    r18,r20,r18
+
+       ALIGN(8)
+$Loop0:        ldq     r3,0(r17)
+       addq    r16,8,r16
+       addq    r17,8,r17
+       subq    r20,1,r20
+       srl     r4,r19,r5
+       sll     r3,r7,r6
+       bis     r3,r3,r4
+       bis     r5,r6,r8
+       stq     r8,-8(r16)
+       bne     r20,$Loop0
+
+$L0:   beq     r18,$Lend
+
+       ALIGN(8)
+$Loop: ldq     r3,0(r17)
+       addq    r16,32,r16
+       subq    r18,4,r18
+       srl     r4,r19,r5
+       sll     r3,r7,r6
+
+       ldq     r4,8(r17)
+       srl     r3,r19,r1
+       bis     r5,r6,r8
+       stq     r8,-32(r16)
+       sll     r4,r7,r2
+
+       ldq     r3,16(r17)
+       srl     r4,r19,r5
+       bis     r1,r2,r8
+       stq     r8,-24(r16)
+       sll     r3,r7,r6
+
+       ldq     r4,24(r17)
+       srl     r3,r19,r1
+       bis     r5,r6,r8
+       stq     r8,-16(r16)
+       sll     r4,r7,r2
+
+       addq    r17,32,r17
+       bis     r1,r2,r8
+       stq     r8,-8(r16)
+
+       bgt     r18,$Loop
+
+$Lend: srl     r4,r19,r8
+       stq     r8,0(r16)
+       ret     r31,(r26),1
+EPILOGUE(mpn_rshift)
+ASM_END()