Reorganisation of the source tree

[ghc-hetmet.git] / rts / gmp / mpn / powerpc32 / rshift.asm

diff --git a/rts/gmp/mpn/powerpc32/rshift.asm b/rts/gmp/mpn/powerpc32/rshift.asm
new file mode 100644 (file)
index 0000000..a09ba04
--- /dev/null
+++ b/rts/gmp/mpn/powerpc32/rshift.asm
@@ -0,0 +1,60 @@
+dnl PowerPC-32 mpn_rshift -- Shift a number right.
+
+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.
+
+
+dnl INPUT PARAMETERS
+dnl res_ptr    r3
+dnl s1_ptr     r4
+dnl size       r5
+dnl cnt                r6
+
+include(`../config.m4')
+
+ASM_START()
+PROLOGUE(mpn_rshift)
+       mtctr   r5              C copy size into CTR
+       addi    r7,r3,-4        C move adjusted res_ptr to free return reg
+       subfic  r8,r6,32
+       lwz     r11,0(r4)       C load first s1 limb
+       slw     r3,r11,r8       C compute function return value
+       bdz     .Lend1
+
+.Loop: lwzu    r10,4(r4)
+       srw     r9,r11,r6
+       slw     r12,r10,r8
+       or      r9,r9,r12
+       stwu    r9,4(r7)
+       bdz     .Lend2
+       lwzu    r11,4(r4)
+       srw     r9,r10,r6
+       slw     r12,r11,r8
+       or      r9,r9,r12
+       stwu    r9,4(r7)
+       bdnz    .Loop
+
+.Lend1:        srw     r0,r11,r6
+       stw     r0,4(r7)
+       blr
+
+.Lend2:        srw     r0,r10,r6
+       stw     r0,4(r7)
+       blr
+EPILOGUE(mpn_rshift)