diff options
Diffstat (limited to 'sysdeps/i386/submul_1.S')
| -rw-r--r-- | sysdeps/i386/submul_1.S | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/sysdeps/i386/submul_1.S b/sysdeps/i386/submul_1.S new file mode 100644 index 0000000000..5ab78f6846 --- /dev/null +++ b/sysdeps/i386/submul_1.S @@ -0,0 +1,75 @@ +/* i80386 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract + the result from a second limb vector. + +Copyright (C) 1992, 1994 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP Library is free software; you can redistribute it and/or modify +it under the terms of the GNU Library General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at your +option) any later version. + +The GNU MP Library is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public +License for more details. + +You should have received a copy of the GNU Library General Public License +along with the GNU MP Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* + INPUT PARAMETERS + res_ptr (sp + 4) + s1_ptr (sp + 8) + size (sp + 12) + s2_limb (sp + 16) +*/ + +#include "sysdep.h" +#include "asm-syntax.h" + +#define res_ptr edi +#define s1_ptr esi +#define size ecx +#define s2_limb ebp + + TEXT + ALIGN (3) + GLOBL C_SYMBOL_NAME(__mpn_submul_1) +C_SYMBOL_NAME(__mpn_submul_1:) + + INSN1(push,l ,R(edi)) + INSN1(push,l ,R(esi)) + INSN1(push,l ,R(ebx)) + INSN1(push,l ,R(ebp)) + + INSN2(mov,l ,R(res_ptr),MEM_DISP(esp,20)) + INSN2(mov,l ,R(s1_ptr),MEM_DISP(esp,24)) + INSN2(mov,l ,R(size),MEM_DISP(esp,28)) + INSN2(mov,l ,R(s2_limb),MEM_DISP(esp,32)) + + INSN2(lea,l ,R(res_ptr),MEM_INDEX(res_ptr,size,4)) + INSN2(lea,l ,R(s1_ptr),MEM_INDEX(s1_ptr,size,4)) + INSN1(neg,l ,R(size)) + INSN2(xor,l ,R(ebx),R(ebx)) + ALIGN (3) +Loop: + INSN2(mov,l ,R(eax),MEM_INDEX(s1_ptr,size,4)) + INSN1(mul,l ,R(s2_limb)) + INSN2(add,l ,R(eax),R(ebx)) + INSN2(adc,l ,R(edx),$0) + INSN2(sub,l ,MEM_INDEX(res_ptr,size,4),R(eax)) + INSN2(adc,l ,R(edx),$0) + INSN2(mov,l ,R(ebx),R(edx)) + + INSN1(inc,l ,R(size)) + INSN1(jnz, ,Loop) + INSN2(mov,l ,R(eax),R(ebx)) + + INSN1(pop,l ,R(ebp)) + INSN1(pop,l ,R(ebx)) + INSN1(pop,l ,R(esi)) + INSN1(pop,l ,R(edi)) + ret |