Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpn / sh / add_n.s

diff --git a/gmp/mpn/sh/add_n.s b/gmp/mpn/sh/add_n.s
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+++ b/gmp/mpn/sh/add_n.s
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+! SH __gmpn_add_n -- Add two limb vectors of the same length > 0 and store
+! sum in a third limb vector.
+
+! Copyright 1995, 1997, 2000 Free Software Foundation, Inc.
+
+! This file is part of the GNU MP Library.
+
+! The GNU MP Library is free software; you can redistribute it and/or modify
+! it under the terms of the GNU Lesser General Public License as published by
+! the Free Software Foundation; either version 3 of the License, or (at your
+! option) any later version.
+
+! The GNU MP Library is distributed in the hope that it will be useful, but
+! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+! or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+! License for more details.
+
+! You should have received a copy of the GNU Lesser General Public License
+! along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
+
+
+! INPUT PARAMETERS
+! res_ptr      r4
+! s1_ptr       r5
+! s2_ptr       r6
+! size         r7
+
+       .text
+       .align 2
+       .global ___gmpn_add_n
+___gmpn_add_n:
+       mov     #0,r3           ! clear cy save reg
+
+Loop:  mov.l   @r5+,r1
+       mov.l   @r6+,r2
+       shlr    r3              ! restore cy
+       addc    r2,r1
+       movt    r3              ! save cy
+       mov.l   r1,@r4
+       dt      r7
+       bf.s    Loop
+        add    #4,r4
+
+       rts
+       mov     r3,r0           ! return carry-out from most sign. limb