Update the in-tree GMP; fixes trac #832

[ghc-hetmet.git] / rts / gmp / mpn / alpha / cntlz.asm

diff --git a/rts/gmp/mpn/alpha/cntlz.asm b/rts/gmp/mpn/alpha/cntlz.asm
deleted file mode 100644 (file)
index febb3b7..0000000
--- a/rts/gmp/mpn/alpha/cntlz.asm
+++ /dev/null
@@ -1,68 +0,0 @@
-dnl  Alpha auxiliary for longlong.h's count_leading_zeros
-
-dnl  Copyright (C) 1997, 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 by
-dnl  the Free Software Foundation; either version 2.1 of the License, or (at your
-dnl  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; see the file COPYING.LIB.  If not, write to
-dnl  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
-dnl  MA 02111-1307, USA.
-
-include(`../config.m4')
-
-dnl  DISCUSSION:
-
-dnl  Other methods have been tried, and using a 128-entry table actually trims
-dnl  about 10% of the execution time (on a 21164) when the table is in the L1
-dnl  cache.  But under non-benchmarking conditions, the table will hardly be in
-dnl  the L1 cache.  Tricky bit-fiddling methods with multiplies and magic tables
-dnl  are also possible, but they require many more instructions than the current
-dnl  code.  (But for count_trailing_zeros, such tricks are beneficial.)
-dnl  Finally, converting to floating-point and extracting the exponent is much
-dnl  slower.
-
-ASM_START()
-PROLOGUE(MPN(count_leading_zeros))
-       bis     r31,63,r0               C initialize partial result count
-
-       srl     r16,32,r1               C shift down 32 steps -> r1
-       cmovne  r1,r1,r16               C select r1 if non-zero
-       cmovne  r1,31,r0                C if r1 is nonzero choose smaller count
-
-       srl     r16,16,r1               C shift down 16 steps -> r1
-       subq    r0,16,r2                C generate new partial result count
-       cmovne  r1,r1,r16               C choose new r1 if non-zero
-       cmovne  r1,r2,r0                C choose new count if r1 was non-zero
-
-       srl     r16,8,r1
-       subq    r0,8,r2
-       cmovne  r1,r1,r16
-       cmovne  r1,r2,r0
-
-       srl     r16,4,r1
-       subq    r0,4,r2
-       cmovne  r1,r1,r16
-       cmovne  r1,r2,r0
-
-       srl     r16,2,r1
-       subq    r0,2,r2
-       cmovne  r1,r1,r16
-       cmovne  r1,r2,r0
-
-       srl     r16,1,r1                C extract bit 1
-       subq    r0,r1,r0                C subtract it from partial result
-
-       ret     r31,(r26),1
-EPILOGUE(MPN(count_leading_zeros))
-ASM_END()