| dnl Intel Pentium mpn_add_n/mpn_sub_n -- mpn addition and subtraction. |
| |
| dnl Copyright 1992, 1994, 1995, 1996, 1999, 2000, 2002 Free Software |
| dnl 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 3 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 License |
| dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. |
| |
| include(`../config.m4') |
| |
| |
| C P5: 2.375 cycles/limb |
| |
| |
| ifdef(`OPERATION_add_n',` |
| define(M4_inst, adcl) |
| define(M4_function_n, mpn_add_n) |
| define(M4_function_nc, mpn_add_nc) |
| |
| ',`ifdef(`OPERATION_sub_n',` |
| define(M4_inst, sbbl) |
| define(M4_function_n, mpn_sub_n) |
| define(M4_function_nc, mpn_sub_nc) |
| |
| ',`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); |
| |
| defframe(PARAM_CARRY,20) |
| defframe(PARAM_SIZE, 16) |
| defframe(PARAM_SRC2, 12) |
| defframe(PARAM_SRC1, 8) |
| defframe(PARAM_DST, 4) |
| |
| TEXT |
| ALIGN(8) |
| PROLOGUE(M4_function_nc) |
| |
| pushl %edi |
| pushl %esi |
| pushl %ebx |
| pushl %ebp |
| deflit(`FRAME',16) |
| |
| movl PARAM_DST,%edi |
| movl PARAM_SRC1,%esi |
| movl PARAM_SRC2,%ebp |
| movl PARAM_SIZE,%ecx |
| |
| movl (%ebp),%ebx |
| |
| decl %ecx |
| movl %ecx,%edx |
| shrl $3,%ecx |
| andl $7,%edx |
| testl %ecx,%ecx C zero carry flag |
| jz L(endgo) |
| |
| pushl %edx |
| FRAME_pushl() |
| movl PARAM_CARRY,%eax |
| shrl $1,%eax C shift bit 0 into carry |
| jmp L(oop) |
| |
| L(endgo): |
| deflit(`FRAME',16) |
| movl PARAM_CARRY,%eax |
| shrl $1,%eax C shift bit 0 into carry |
| jmp L(end) |
| |
| EPILOGUE() |
| |
| |
| ALIGN(8) |
| PROLOGUE(M4_function_n) |
| |
| pushl %edi |
| pushl %esi |
| pushl %ebx |
| pushl %ebp |
| deflit(`FRAME',16) |
| |
| movl PARAM_DST,%edi |
| movl PARAM_SRC1,%esi |
| movl PARAM_SRC2,%ebp |
| movl PARAM_SIZE,%ecx |
| |
| movl (%ebp),%ebx |
| |
| decl %ecx |
| movl %ecx,%edx |
| shrl $3,%ecx |
| andl $7,%edx |
| testl %ecx,%ecx C zero carry flag |
| jz L(end) |
| pushl %edx |
| FRAME_pushl() |
| |
| ALIGN(8) |
| L(oop): movl 28(%edi),%eax C fetch destination cache line |
| leal 32(%edi),%edi |
| |
| L(1): movl (%esi),%eax |
| movl 4(%esi),%edx |
| M4_inst %ebx,%eax |
| movl 4(%ebp),%ebx |
| M4_inst %ebx,%edx |
| movl 8(%ebp),%ebx |
| movl %eax,-32(%edi) |
| movl %edx,-28(%edi) |
| |
| L(2): movl 8(%esi),%eax |
| movl 12(%esi),%edx |
| M4_inst %ebx,%eax |
| movl 12(%ebp),%ebx |
| M4_inst %ebx,%edx |
| movl 16(%ebp),%ebx |
| movl %eax,-24(%edi) |
| movl %edx,-20(%edi) |
| |
| L(3): movl 16(%esi),%eax |
| movl 20(%esi),%edx |
| M4_inst %ebx,%eax |
| movl 20(%ebp),%ebx |
| M4_inst %ebx,%edx |
| movl 24(%ebp),%ebx |
| movl %eax,-16(%edi) |
| movl %edx,-12(%edi) |
| |
| L(4): movl 24(%esi),%eax |
| movl 28(%esi),%edx |
| M4_inst %ebx,%eax |
| movl 28(%ebp),%ebx |
| M4_inst %ebx,%edx |
| movl 32(%ebp),%ebx |
| movl %eax,-8(%edi) |
| movl %edx,-4(%edi) |
| |
| leal 32(%esi),%esi |
| leal 32(%ebp),%ebp |
| decl %ecx |
| jnz L(oop) |
| |
| popl %edx |
| FRAME_popl() |
| L(end): |
| decl %edx C test %edx w/o clobbering carry |
| js L(end2) |
| incl %edx |
| L(oop2): |
| leal 4(%edi),%edi |
| movl (%esi),%eax |
| M4_inst %ebx,%eax |
| movl 4(%ebp),%ebx |
| movl %eax,-4(%edi) |
| leal 4(%esi),%esi |
| leal 4(%ebp),%ebp |
| decl %edx |
| jnz L(oop2) |
| L(end2): |
| movl (%esi),%eax |
| M4_inst %ebx,%eax |
| movl %eax,(%edi) |
| |
| sbbl %eax,%eax |
| negl %eax |
| |
| popl %ebp |
| popl %ebx |
| popl %esi |
| popl %edi |
| ret |
| |
| EPILOGUE() |