diff options
Diffstat (limited to 'rts/gmp/mpn/x86/k7/aors_n.asm')
| -rw-r--r-- | rts/gmp/mpn/x86/k7/aors_n.asm | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/rts/gmp/mpn/x86/k7/aors_n.asm b/rts/gmp/mpn/x86/k7/aors_n.asm new file mode 100644 index 0000000000..85fa9d3036 --- /dev/null +++ b/rts/gmp/mpn/x86/k7/aors_n.asm @@ -0,0 +1,250 @@ +dnl AMD K7 mpn_add_n/mpn_sub_n -- mpn add or subtract. +dnl +dnl K7: 1.64 cycles/limb (at 16 limb/loop). + + +dnl Copyright (C) 1999, 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') + + +dnl K7: UNROLL_COUNT cycles/limb +dnl 8 1.9 +dnl 16 1.64 +dnl 32 1.7 +dnl 64 2.0 +dnl Maximum possible with the current code is 64. + +deflit(UNROLL_COUNT, 16) + + +ifdef(`OPERATION_add_n', ` + define(M4_inst, adcl) + define(M4_function_n, mpn_add_n) + define(M4_function_nc, mpn_add_nc) + define(M4_description, add) +',`ifdef(`OPERATION_sub_n', ` + define(M4_inst, sbbl) + define(M4_function_n, mpn_sub_n) + define(M4_function_nc, mpn_sub_nc) + define(M4_description, subtract) +',`m4_error(`Need OPERATION_add_n or OPERATION_sub_n +')')') + +MULFUNC_PROLOGUE(mpn_add_n mpn_add_nc mpn_sub_n mpn_sub_nc) + + +C mp_limb_t M4_function_n (mp_ptr dst, mp_srcptr src1, mp_srcptr src2, +C mp_size_t size); +C mp_limb_t M4_function_nc (mp_ptr dst, mp_srcptr src1, mp_srcptr src2, +C mp_size_t size, mp_limb_t carry); +C +C Calculate src1,size M4_description src2,size, and store the result in +C dst,size. The return value is the carry bit from the top of the result (1 +C or 0). +C +C The _nc version accepts 1 or 0 for an initial carry into the low limb of +C the calculation. Note values other than 1 or 0 here will lead to garbage +C results. +C +C This code runs at 1.64 cycles/limb, which is probably the best possible +C with plain integer operations. Each limb is 2 loads and 1 store, and in +C one cycle the K7 can do two loads, or a load and a store, leading to 1.5 +C c/l. + +dnl Must have UNROLL_THRESHOLD >= 2, since the unrolled loop can't handle 1. +ifdef(`PIC',` +deflit(UNROLL_THRESHOLD, 8) +',` +deflit(UNROLL_THRESHOLD, 8) +') + +defframe(PARAM_CARRY,20) +defframe(PARAM_SIZE, 16) +defframe(PARAM_SRC2, 12) +defframe(PARAM_SRC1, 8) +defframe(PARAM_DST, 4) + +defframe(SAVE_EBP, -4) +defframe(SAVE_ESI, -8) +defframe(SAVE_EBX, -12) +defframe(SAVE_EDI, -16) +deflit(STACK_SPACE, 16) + + .text + ALIGN(32) +deflit(`FRAME',0) + +PROLOGUE(M4_function_nc) + movl PARAM_CARRY, %eax + jmp LF(M4_function_n,start) +EPILOGUE() + +PROLOGUE(M4_function_n) + + xorl %eax, %eax C carry +L(start): + movl PARAM_SIZE, %ecx + subl $STACK_SPACE, %esp +deflit(`FRAME',STACK_SPACE) + + movl %edi, SAVE_EDI + movl %ebx, SAVE_EBX + cmpl $UNROLL_THRESHOLD, %ecx + + movl PARAM_SRC2, %edx + movl PARAM_SRC1, %ebx + jae L(unroll) + + movl PARAM_DST, %edi + leal (%ebx,%ecx,4), %ebx + leal (%edx,%ecx,4), %edx + + leal (%edi,%ecx,4), %edi + negl %ecx + shrl %eax + + C This loop in in a single 16 byte code block already, so no + C alignment necessary. +L(simple): + C eax scratch + C ebx src1 + C ecx counter + C edx src2 + C esi + C edi dst + C ebp + + movl (%ebx,%ecx,4), %eax + M4_inst (%edx,%ecx,4), %eax + movl %eax, (%edi,%ecx,4) + incl %ecx + jnz L(simple) + + movl $0, %eax + movl SAVE_EDI, %edi + + movl SAVE_EBX, %ebx + setc %al + addl $STACK_SPACE, %esp + + ret + + +C ----------------------------------------------------------------------------- + C This is at 0x55, close enough to aligned. +L(unroll): +deflit(`FRAME',STACK_SPACE) + movl %ebp, SAVE_EBP + andl $-2, %ecx C size low bit masked out + andl $1, PARAM_SIZE C size low bit kept + + movl %ecx, %edi + decl %ecx + movl PARAM_DST, %ebp + + shrl $UNROLL_LOG2, %ecx + negl %edi + movl %esi, SAVE_ESI + + andl $UNROLL_MASK, %edi + +ifdef(`PIC',` + call L(pic_calc) +L(here): +',` + leal L(entry) (%edi,%edi,8), %esi C 9 bytes per +') + negl %edi + shrl %eax + + leal ifelse(UNROLL_BYTES,256,128) (%ebx,%edi,4), %ebx + leal ifelse(UNROLL_BYTES,256,128) (%edx,%edi,4), %edx + leal ifelse(UNROLL_BYTES,256,128) (%ebp,%edi,4), %edi + + jmp *%esi + + +ifdef(`PIC',` +L(pic_calc): + C See README.family about old gas bugs + leal (%edi,%edi,8), %esi + addl $L(entry)-L(here), %esi + addl (%esp), %esi + ret +') + + +C ----------------------------------------------------------------------------- + ALIGN(32) +L(top): + C eax zero + C ebx src1 + C ecx counter + C edx src2 + C esi scratch (was computed jump) + C edi dst + C ebp scratch + + leal UNROLL_BYTES(%edx), %edx + +L(entry): +deflit(CHUNK_COUNT, 2) +forloop(i, 0, UNROLL_COUNT/CHUNK_COUNT-1, ` + deflit(`disp0', eval(i*CHUNK_COUNT*4 ifelse(UNROLL_BYTES,256,-128))) + deflit(`disp1', eval(disp0 + 4)) + +Zdisp( movl, disp0,(%ebx), %esi) + movl disp1(%ebx), %ebp +Zdisp( M4_inst,disp0,(%edx), %esi) +Zdisp( movl, %esi, disp0,(%edi)) + M4_inst disp1(%edx), %ebp + movl %ebp, disp1(%edi) +') + + decl %ecx + leal UNROLL_BYTES(%ebx), %ebx + leal UNROLL_BYTES(%edi), %edi + jns L(top) + + + mov PARAM_SIZE, %esi + movl SAVE_EBP, %ebp + movl $0, %eax + + decl %esi + js L(even) + + movl (%ebx), %ecx + M4_inst UNROLL_BYTES(%edx), %ecx + movl %ecx, (%edi) +L(even): + + movl SAVE_EDI, %edi + movl SAVE_EBX, %ebx + setc %al + + movl SAVE_ESI, %esi + addl $STACK_SPACE, %esp + + ret + +EPILOGUE() |