diff options
Diffstat (limited to 'libotr/libgcrypt-1.8.7/mpi/i386/mpih-mul3.S')
| -rw-r--r-- | libotr/libgcrypt-1.8.7/mpi/i386/mpih-mul3.S | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/libotr/libgcrypt-1.8.7/mpi/i386/mpih-mul3.S b/libotr/libgcrypt-1.8.7/mpi/i386/mpih-mul3.S new file mode 100644 index 0000000..6df2017 --- /dev/null +++ b/libotr/libgcrypt-1.8.7/mpi/i386/mpih-mul3.S @@ -0,0 +1,86 @@ +/* i80386 submul_1 -- Multiply a limb vector with a limb and add + * the result to a second limb vector. + * + * Copyright (C) 1992, 1994, 1998, + * 2001, 2002 Free Software Foundation, Inc. + * + * This file is part of Libgcrypt. + * + * Libgcrypt is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * Libgcrypt 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + * + * Note: This code is heavily based on the GNU MP Library. + * Actually it's the same code with only minor changes in the + * way the data is stored; this is to support the abstraction + * of an optional secure memory allocation which may be used + * to avoid revealing of sensitive data due to paging etc. + */ + + +#include "sysdep.h" +#include "asm-syntax.h" + + +/******************* + * mpi_limb_t + * _gcry_mpih_submul_1( mpi_ptr_t res_ptr, (sp + 4) + * mpi_ptr_t s1_ptr, (sp + 8) + * mpi_size_t s1_size, (sp + 12) + * mpi_limb_t s2_limb) (sp + 16) + */ + +#define res_ptr edi +#define s1_ptr esi +#define size ecx +#define s2_limb ebp + + TEXT + ALIGN (3) + GLOBL C_SYMBOL_NAME(_gcry_mpih_submul_1) +C_SYMBOL_NAME(_gcry_mpih_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 + |