diff options
Diffstat (limited to 'gmp-6.3.0/mpn/alpha/cntlz.asm')
| -rw-r--r-- | gmp-6.3.0/mpn/alpha/cntlz.asm | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/alpha/cntlz.asm b/gmp-6.3.0/mpn/alpha/cntlz.asm new file mode 100644 index 0000000..25af19b --- /dev/null +++ b/gmp-6.3.0/mpn/alpha/cntlz.asm @@ -0,0 +1,55 @@ +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 +dnl The GNU MP Library is free software; you can redistribute it and/or modify +dnl it under the terms of either: +dnl +dnl * the GNU Lesser General Public License as published by the Free +dnl Software Foundation; either version 3 of the License, or (at your +dnl option) any later version. +dnl +dnl or +dnl +dnl * the GNU General Public License as published by the Free Software +dnl Foundation; either version 2 of the License, or (at your option) any +dnl later version. +dnl +dnl or both in parallel, as here. +dnl +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 General Public License +dnl for more details. +dnl +dnl You should have received copies of the GNU General Public License and the +dnl GNU Lesser General Public License along with the GNU MP Library. If not, +dnl see https://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() |