Reorganisation of the source tree

[ghc-hetmet.git] / rts / gmp / mpn / sh / sh2 / submul_1.s

diff --git a/rts/gmp/mpn/sh/sh2/submul_1.s b/rts/gmp/mpn/sh/sh2/submul_1.s
new file mode 100644 (file)
index 0000000..eb9a27d
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+++ b/rts/gmp/mpn/sh/sh2/submul_1.s
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+! SH2 __gmpn_submul_1 -- Multiply a limb vector with a limb and subtract
+! the result from a second limb vector.
+
+! Copyright (C) 1995, 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 2.1 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; see the file COPYING.LIB.  If not, write to
+! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+! MA 02111-1307, USA.
+
+
+! INPUT PARAMETERS
+! res_ptr      r4
+! s1_ptr       r5
+! size         r6
+! s2_limb      r7
+
+       .text
+       .align 1
+       .global ___gmpn_submul_1
+___gmpn_submul_1:
+       mov     #0,r2           ! cy_limb = 0
+       mov     #0,r0           ! Keep r0 = 0 for entire loop
+       clrt
+
+Loop:  mov.l   @r5+,r3
+       dmulu.l r3,r7
+       sts     macl,r1
+       addc    r2,r1           ! lo_prod += old cy_limb
+       sts     mach,r2         ! new cy_limb = hi_prod
+       mov.l   @r4,r3
+       addc    r0,r2           ! cy_limb += T, T = 0
+       subc    r3,r1
+       addc    r0,r2           ! cy_limb += T, T = 0
+       dt      r6
+       mov.l   r1,@r4
+       bf.s    Loop
+       add     #4,r4
+
+       rts
+       mov     r2,r0