Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpn / alpha / cntlz.asm

diff --git a/gmp/mpn/alpha/cntlz.asm b/gmp/mpn/alpha/cntlz.asm
new file mode 100644 (file)
index 0000000..2bfd923
--- /dev/null
+++ b/gmp/mpn/alpha/cntlz.asm
@@ -0,0 +1,44 @@
+dnl  Alpha auxiliary for longlong.h's count_leading_zeros
+
+dnl  Copyright 1997, 2000, 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')
+
+
+ASM_START()
+EXTERN(__clz_tab)
+PROLOGUE(mpn_count_leading_zeros,gp)
+       cmpbge  r31,  r16, r1
+       LEA(r3,__clz_tab)
+       sra     r1,   1,   r1
+       xor     r1,   127, r1
+       srl     r16,  1,   r16
+       addq    r1,   r3,  r1
+       ldq_u   r0,   0(r1)
+       lda     r2,   64
+       extbl   r0,   r1,   r0
+       s8subl  r0,   8,    r0
+       srl     r16,  r0,   r16
+       addq    r16,  r3,   r16
+       ldq_u   r1,   0(r16)
+       extbl   r1,   r16,  r1
+       subq    r2,   r1,   r2
+       subq    r2,   r0,   r0
+       ret     r31,  (r26),1
+EPILOGUE(mpn_count_leading_zeros)
+ASM_END()