X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2Fgmp%2Fmpn%2Fx86%2Fk7%2Fdiveby3.asm;fp=ghc%2Frts%2Fgmp%2Fmpn%2Fx86%2Fk7%2Fdiveby3.asm;h=0000000000000000000000000000000000000000;hb=0065d5ab628975892cea1ec7303f968c3338cbe1;hp=57684958a58ee5f9c423eba817c0b7ca39109376;hpb=28a464a75e14cece5db40f2765a29348273ff2d2;p=ghc-hetmet.git diff --git a/ghc/rts/gmp/mpn/x86/k7/diveby3.asm b/ghc/rts/gmp/mpn/x86/k7/diveby3.asm deleted file mode 100644 index 5768495..0000000 --- a/ghc/rts/gmp/mpn/x86/k7/diveby3.asm +++ /dev/null @@ -1,131 +0,0 @@ -dnl AMD K7 mpn_divexact_by3 -- mpn division by 3, expecting no remainder. -dnl -dnl K7: 8.0 cycles/limb - - -dnl Copyright (C) 2000 Free Software Foundation, Inc. -dnl -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 -dnl modify it under the terms of the GNU Lesser General Public License as -dnl published by the Free Software Foundation; either version 2.1 of the -dnl License, or (at your option) any later version. -dnl -dnl The GNU MP Library is distributed in the hope that it will be useful, -dnl but WITHOUT ANY WARRANTY; without even the implied warranty of -dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -dnl Lesser General Public License for more details. -dnl -dnl You should have received a copy of the GNU Lesser General Public -dnl License along with the GNU MP Library; see the file COPYING.LIB. If -dnl not, write to the Free Software Foundation, Inc., 59 Temple Place - -dnl Suite 330, Boston, MA 02111-1307, USA. - - -include(`../config.m4') - - -C mp_limb_t mpn_divexact_by3c (mp_ptr dst, mp_srcptr src, mp_size_t size, -C mp_limb_t carry); - -defframe(PARAM_CARRY,16) -defframe(PARAM_SIZE, 12) -defframe(PARAM_SRC, 8) -defframe(PARAM_DST, 4) - -dnl multiplicative inverse of 3, modulo 2^32 -deflit(INVERSE_3, 0xAAAAAAAB) - -dnl ceil(b/3) and floor(b*2/3) where b=2^32 -deflit(ONE_THIRD_CEIL, 0x55555556) -deflit(TWO_THIRDS_FLOOR, 0xAAAAAAAA) - - .text - ALIGN(32) - -PROLOGUE(mpn_divexact_by3c) -deflit(`FRAME',0) - - movl PARAM_SRC, %ecx - pushl %ebx defframe_pushl(SAVE_EBX) - - movl PARAM_CARRY, %ebx - pushl %ebp defframe_pushl(SAVE_EBP) - - movl PARAM_SIZE, %ebp - pushl %edi defframe_pushl(SAVE_EDI) - - movl (%ecx), %eax C src low limb - pushl %esi defframe_pushl(SAVE_ESI) - - movl PARAM_DST, %edi - movl $TWO_THIRDS_FLOOR, %esi - leal -4(%ecx,%ebp,4), %ecx C &src[size-1] - - subl %ebx, %eax - - setc %bl - decl %ebp - jz L(last) - - leal (%edi,%ebp,4), %edi C &dst[size-1] - negl %ebp - - - ALIGN(16) -L(top): - C eax src limb, carry subtracted - C ebx carry limb (0 or 1) - C ecx &src[size-1] - C edx scratch - C esi TWO_THIRDS_FLOOR - C edi &dst[size-1] - C ebp counter, limbs, negative - - imull $INVERSE_3, %eax, %edx - - movl 4(%ecx,%ebp,4), %eax C next src limb - cmpl $ONE_THIRD_CEIL, %edx - - sbbl $-1, %ebx C +1 if result>=ceil(b/3) - cmpl %edx, %esi - - sbbl %ebx, %eax C and further 1 if result>=ceil(b*2/3) - movl %edx, (%edi,%ebp,4) - incl %ebp - - setc %bl C new carry - jnz L(top) - - - -L(last): - C eax src limb, carry subtracted - C ebx carry limb (0 or 1) - C ecx &src[size-1] - C edx scratch - C esi multiplier - C edi &dst[size-1] - C ebp - - imull $INVERSE_3, %eax - - cmpl $ONE_THIRD_CEIL, %eax - movl %eax, (%edi) - movl SAVE_EBP, %ebp - - sbbl $-1, %ebx C +1 if eax>=ceil(b/3) - cmpl %eax, %esi - movl $0, %eax - - adcl %ebx, %eax C further +1 if eax>=ceil(b*2/3) - movl SAVE_EDI, %edi - movl SAVE_ESI, %esi - - movl SAVE_EBX, %ebx - addl $FRAME, %esp - - ret - -EPILOGUE()