Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpn / pa32 / hppa1_1 / pa7100 / sub_n.asm

diff --git a/gmp/mpn/pa32/hppa1_1/pa7100/sub_n.asm b/gmp/mpn/pa32/hppa1_1/pa7100/sub_n.asm
new file mode 100644 (file)
index 0000000..38ea0e1
--- /dev/null
+++ b/gmp/mpn/pa32/hppa1_1/pa7100/sub_n.asm
@@ -0,0 +1,74 @@
+dnl  HP-PA mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
+dnl  store difference in a third limb vector.  Optimized for the PA7100, where
+dnl  is runs at 4.25 cycles/limb.
+
+dnl  Copyright 1992, 1994, 2000, 2001, 2002, 2003 Free Software Foundation,
+dnl  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      r26
+C s1_ptr       r25
+C s2_ptr       r24
+C size         r23
+
+ASM_START()
+PROLOGUE(mpn_sub_n)
+       ldws,ma         4(0,%r25),%r20
+       ldws,ma         4(0,%r24),%r19
+
+       addib,<=        -5,%r23,L(rest)
+        sub            %r20,%r19,%r28  C subtract first limbs ignoring cy
+
+LDEF(loop)
+       ldws,ma         4(0,%r25),%r20
+       ldws,ma         4(0,%r24),%r19
+       stws,ma         %r28,4(0,%r26)
+       subb            %r20,%r19,%r28
+       ldws,ma         4(0,%r25),%r20
+       ldws,ma         4(0,%r24),%r19
+       stws,ma         %r28,4(0,%r26)
+       subb            %r20,%r19,%r28
+       ldws,ma         4(0,%r25),%r20
+       ldws,ma         4(0,%r24),%r19
+       stws,ma         %r28,4(0,%r26)
+       subb            %r20,%r19,%r28
+       ldws,ma         4(0,%r25),%r20
+       ldws,ma         4(0,%r24),%r19
+       stws,ma         %r28,4(0,%r26)
+       addib,>         -4,%r23,L(loop)
+       subb            %r20,%r19,%r28
+
+LDEF(rest)
+       addib,=         4,%r23,L(end)
+       nop
+
+LDEF(eloop)
+       ldws,ma         4(0,%r25),%r20
+       ldws,ma         4(0,%r24),%r19
+       stws,ma         %r28,4(0,%r26)
+       addib,>         -1,%r23,L(eloop)
+       subb            %r20,%r19,%r28
+
+LDEF(end)
+       stws            %r28,0(0,%r26)
+       addc            %r0,%r0,%r28
+       bv              0(%r2)
+        subi           1,%r28,%r28
+EPILOGUE()