Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpn / pa32 / add_n.asm

diff --git a/gmp/mpn/pa32/add_n.asm b/gmp/mpn/pa32/add_n.asm
new file mode 100644 (file)
index 0000000..1bb27ae
--- /dev/null
+++ b/gmp/mpn/pa32/add_n.asm
@@ -0,0 +1,52 @@
+dnl  HP-PA mpn_add_n -- Add two limb vectors of the same length > 0 and store
+dnl  sum in a third limb vector.
+
+dnl  Copyright 1992, 1994, 2000, 2001, 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 INPUT PARAMETERS
+C res_ptr      gr26
+C s1_ptr       gr25
+C s2_ptr       gr24
+C size         gr23
+
+C One might want to unroll this as for other processors, but it turns out that
+C the data cache contention after a store makes such unrolling useless.  We
+C can't come under 5 cycles/limb anyway.
+
+ASM_START()
+PROLOGUE(mpn_add_n)
+       ldws,ma         4(0,%r25),%r20
+       ldws,ma         4(0,%r24),%r19
+
+       addib,=         -1,%r23,L(end)  C check for (SIZE == 1)
+        add            %r20,%r19,%r28  C add first limbs ignoring cy
+
+LDEF(loop)
+       ldws,ma         4(0,%r25),%r20
+       ldws,ma         4(0,%r24),%r19
+       stws,ma         %r28,4(0,%r26)
+       addib,<>        -1,%r23,L(loop)
+        addc           %r20,%r19,%r28
+
+LDEF(end)
+       stws            %r28,0(0,%r26)
+       bv              0(%r2)
+        addc           %r0,%r0,%r28
+EPILOGUE()