Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpn / sparc32 / lshift.asm

diff --git a/gmp/mpn/sparc32/lshift.asm b/gmp/mpn/sparc32/lshift.asm
new file mode 100644 (file)
index 0000000..00004f8
--- /dev/null
+++ b/gmp/mpn/sparc32/lshift.asm
@@ -0,0 +1,94 @@
+dnl  SPARC mpn_lshift -- Shift a number left.
+
+dnl  Copyright 1995, 1996, 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
+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 INPUT PARAMETERS
+C res_ptr      %o0
+C src_ptr      %o1
+C size         %o2
+C cnt          %o3
+
+ASM_START()
+PROLOGUE(mpn_lshift)
+       sll     %o2,2,%g1
+       add     %o1,%g1,%o1     C make %o1 point at end of src
+       ld      [%o1-4],%g2     C load first limb
+       sub     %g0,%o3,%o5     C negate shift count
+       add     %o0,%g1,%o0     C make %o0 point at end of res
+       add     %o2,-1,%o2
+       andcc   %o2,4-1,%g4     C number of limbs in first loop
+       srl     %g2,%o5,%g1     C compute function result
+       be      L(0)            C if multiple of 4 limbs, skip first loop
+       st      %g1,[%sp+80]
+
+       sub     %o2,%g4,%o2     C adjust count for main loop
+
+L(loop0):
+       ld      [%o1-8],%g3
+       add     %o0,-4,%o0
+       add     %o1,-4,%o1
+       addcc   %g4,-1,%g4
+       sll     %g2,%o3,%o4
+       srl     %g3,%o5,%g1
+       mov     %g3,%g2
+       or      %o4,%g1,%o4
+       bne     L(loop0)
+        st     %o4,[%o0+0]
+
+L(0):  tst     %o2
+       be      L(end)
+        nop
+
+L(loop):
+       ld      [%o1-8],%g3
+       add     %o0,-16,%o0
+       addcc   %o2,-4,%o2
+       sll     %g2,%o3,%o4
+       srl     %g3,%o5,%g1
+
+       ld      [%o1-12],%g2
+       sll     %g3,%o3,%g4
+       or      %o4,%g1,%o4
+       st      %o4,[%o0+12]
+       srl     %g2,%o5,%g1
+
+       ld      [%o1-16],%g3
+       sll     %g2,%o3,%o4
+       or      %g4,%g1,%g4
+       st      %g4,[%o0+8]
+       srl     %g3,%o5,%g1
+
+       ld      [%o1-20],%g2
+       sll     %g3,%o3,%g4
+       or      %o4,%g1,%o4
+       st      %o4,[%o0+4]
+       srl     %g2,%o5,%g1
+
+       add     %o1,-16,%o1
+       or      %g4,%g1,%g4
+       bne     L(loop)
+        st     %g4,[%o0+0]
+
+L(end):        sll     %g2,%o3,%g2
+       st      %g2,[%o0-4]
+       retl
+       ld      [%sp+80],%o0
+EPILOGUE(mpn_lshift)