--- /dev/null
+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()
projects / msp430-gcc.git / blobdiff