mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-09-19 19:50:18 +02:00
349 lines
8.4 KiB
ArmAsm
349 lines
8.4 KiB
ArmAsm
/
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/ ***** BEGIN LICENSE BLOCK *****
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/ Version: MPL 1.1/GPL 2.0/LGPL 2.1
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/
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/ The contents of this file are subject to the Mozilla Public License Version
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/ 1.1 (the "License"); you may not use this file except in compliance with
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/ the License. You may obtain a copy of the License at
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/ http://www.mozilla.org/MPL/
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/
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/ Software distributed under the License is distributed on an "AS IS" basis,
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/ WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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/ for the specific language governing rights and limitations under the
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/ License.
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/
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/ The Original Code is the Netscape security libraries.
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/
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/ The Initial Developer of the Original Code is
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/ Netscape Communications Corporation.
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/ Portions created by the Initial Developer are Copyright (C) 2001
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/ the Initial Developer. All Rights Reserved.
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/
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/ Contributor(s):
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/
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/ Alternatively, the contents of this file may be used under the terms of
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/ either the GNU General Public License Version 2 or later (the "GPL"), or
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/ the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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/ in which case the provisions of the GPL or the LGPL are applicable instead
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/ of those above. If you wish to allow use of your version of this file only
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/ under the terms of either the GPL or the LGPL, and not to allow others to
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/ use your version of this file under the terms of the MPL, indicate your
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/ decision by deleting the provisions above and replace them with the notice
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/ and other provisions required by the GPL or the LGPL. If you do not delete
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/ the provisions above, a recipient may use your version of this file under
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/ the terms of any one of the MPL, the GPL or the LGPL.
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/
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/ ***** END LICENSE BLOCK *****
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/ $Id: mpi_i86pc.s,v 1.2 2006/12/11 09:45:32 gerv%gerv.net Exp $
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/
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.text
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/ ebp - 36: caller's esi
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/ ebp - 32: caller's edi
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/ ebp - 28:
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/ ebp - 24:
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/ ebp - 20:
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/ ebp - 16:
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/ ebp - 12:
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/ ebp - 8:
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/ ebp - 4:
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/ ebp + 0: caller's ebp
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/ ebp + 4: return address
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/ ebp + 8: a argument
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/ ebp + 12: a_len argument
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/ ebp + 16: b argument
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/ ebp + 20: c argument
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/ registers:
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/ eax:
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/ ebx: carry
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/ ecx: a_len
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/ edx:
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/ esi: a ptr
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/ edi: c ptr
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.globl s_mpv_mul_d
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.type s_mpv_mul_d,@function
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s_mpv_mul_d:
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push %ebp
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mov %esp,%ebp
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sub $28,%esp
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push %edi
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push %esi
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push %ebx
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movl $0,%ebx / carry = 0
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mov 12(%ebp),%ecx / ecx = a_len
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mov 20(%ebp),%edi
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cmp $0,%ecx
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je L2 / jmp if a_len == 0
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mov 8(%ebp),%esi / esi = a
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cld
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L1:
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lodsl / eax = [ds:esi]; esi += 4
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mov 16(%ebp),%edx / edx = b
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mull %edx / edx:eax = Phi:Plo = a_i * b
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add %ebx,%eax / add carry (%ebx) to edx:eax
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adc $0,%edx
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mov %edx,%ebx / high half of product becomes next carry
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stosl / [es:edi] = ax; edi += 4;
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dec %ecx / --a_len
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jnz L1 / jmp if a_len != 0
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L2:
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mov %ebx,0(%edi) / *c = carry
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pop %ebx
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pop %esi
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pop %edi
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leave
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ret
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nop
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/ ebp - 36: caller's esi
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/ ebp - 32: caller's edi
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/ ebp - 28:
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/ ebp - 24:
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/ ebp - 20:
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/ ebp - 16:
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/ ebp - 12:
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/ ebp - 8:
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/ ebp - 4:
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/ ebp + 0: caller's ebp
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/ ebp + 4: return address
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/ ebp + 8: a argument
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/ ebp + 12: a_len argument
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/ ebp + 16: b argument
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/ ebp + 20: c argument
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/ registers:
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/ eax:
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/ ebx: carry
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/ ecx: a_len
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/ edx:
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/ esi: a ptr
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/ edi: c ptr
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.globl s_mpv_mul_d_add
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.type s_mpv_mul_d_add,@function
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s_mpv_mul_d_add:
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push %ebp
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mov %esp,%ebp
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sub $28,%esp
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push %edi
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push %esi
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push %ebx
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movl $0,%ebx / carry = 0
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mov 12(%ebp),%ecx / ecx = a_len
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mov 20(%ebp),%edi
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cmp $0,%ecx
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je L4 / jmp if a_len == 0
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mov 8(%ebp),%esi / esi = a
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cld
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L3:
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lodsl / eax = [ds:esi]; esi += 4
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mov 16(%ebp),%edx / edx = b
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mull %edx / edx:eax = Phi:Plo = a_i * b
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add %ebx,%eax / add carry (%ebx) to edx:eax
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adc $0,%edx
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mov 0(%edi),%ebx / add in current word from *c
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add %ebx,%eax
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adc $0,%edx
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mov %edx,%ebx / high half of product becomes next carry
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stosl / [es:edi] = ax; edi += 4;
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dec %ecx / --a_len
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jnz L3 / jmp if a_len != 0
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L4:
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mov %ebx,0(%edi) / *c = carry
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pop %ebx
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pop %esi
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pop %edi
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leave
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ret
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nop
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/ ebp - 36: caller's esi
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/ ebp - 32: caller's edi
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/ ebp - 28:
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/ ebp - 24:
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/ ebp - 20:
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/ ebp - 16:
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/ ebp - 12:
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/ ebp - 8:
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/ ebp - 4:
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/ ebp + 0: caller's ebp
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/ ebp + 4: return address
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/ ebp + 8: a argument
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/ ebp + 12: a_len argument
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/ ebp + 16: b argument
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/ ebp + 20: c argument
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/ registers:
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/ eax:
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/ ebx: carry
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/ ecx: a_len
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/ edx:
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/ esi: a ptr
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/ edi: c ptr
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.globl s_mpv_mul_d_add_prop
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.type s_mpv_mul_d_add_prop,@function
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s_mpv_mul_d_add_prop:
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push %ebp
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mov %esp,%ebp
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sub $28,%esp
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push %edi
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push %esi
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push %ebx
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movl $0,%ebx / carry = 0
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mov 12(%ebp),%ecx / ecx = a_len
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mov 20(%ebp),%edi
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cmp $0,%ecx
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je L6 / jmp if a_len == 0
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cld
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mov 8(%ebp),%esi / esi = a
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L5:
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lodsl / eax = [ds:esi]; esi += 4
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mov 16(%ebp),%edx / edx = b
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mull %edx / edx:eax = Phi:Plo = a_i * b
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add %ebx,%eax / add carry (%ebx) to edx:eax
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adc $0,%edx
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mov 0(%edi),%ebx / add in current word from *c
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add %ebx,%eax
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adc $0,%edx
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mov %edx,%ebx / high half of product becomes next carry
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stosl / [es:edi] = ax; edi += 4;
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dec %ecx / --a_len
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jnz L5 / jmp if a_len != 0
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L6:
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cmp $0,%ebx / is carry zero?
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jz L8
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mov 0(%edi),%eax / add in current word from *c
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add %ebx,%eax
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stosl / [es:edi] = ax; edi += 4;
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jnc L8
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L7:
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mov 0(%edi),%eax / add in current word from *c
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adc $0,%eax
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stosl / [es:edi] = ax; edi += 4;
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jc L7
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L8:
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pop %ebx
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pop %esi
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pop %edi
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leave
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ret
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nop
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/ ebp - 20: caller's esi
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/ ebp - 16: caller's edi
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/ ebp - 12:
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/ ebp - 8: carry
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/ ebp - 4: a_len local
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/ ebp + 0: caller's ebp
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/ ebp + 4: return address
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/ ebp + 8: pa argument
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/ ebp + 12: a_len argument
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/ ebp + 16: ps argument
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/ ebp + 20:
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/ registers:
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/ eax:
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/ ebx: carry
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/ ecx: a_len
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/ edx:
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/ esi: a ptr
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/ edi: c ptr
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.globl s_mpv_sqr_add_prop
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.type s_mpv_sqr_add_prop,@function
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s_mpv_sqr_add_prop:
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push %ebp
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mov %esp,%ebp
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sub $12,%esp
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push %edi
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push %esi
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push %ebx
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movl $0,%ebx / carry = 0
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mov 12(%ebp),%ecx / a_len
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mov 16(%ebp),%edi / edi = ps
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cmp $0,%ecx
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je L11 / jump if a_len == 0
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cld
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mov 8(%ebp),%esi / esi = pa
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L10:
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lodsl / %eax = [ds:si]; si += 4;
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mull %eax
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add %ebx,%eax / add "carry"
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adc $0,%edx
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mov 0(%edi),%ebx
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add %ebx,%eax / add low word from result
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mov 4(%edi),%ebx
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stosl / [es:di] = %eax; di += 4;
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adc %ebx,%edx / add high word from result
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movl $0,%ebx
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mov %edx,%eax
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adc $0,%ebx
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stosl / [es:di] = %eax; di += 4;
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dec %ecx / --a_len
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jnz L10 / jmp if a_len != 0
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L11:
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cmp $0,%ebx / is carry zero?
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jz L14
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mov 0(%edi),%eax / add in current word from *c
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add %ebx,%eax
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stosl / [es:edi] = ax; edi += 4;
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jnc L14
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L12:
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mov 0(%edi),%eax / add in current word from *c
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adc $0,%eax
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stosl / [es:edi] = ax; edi += 4;
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jc L12
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L14:
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pop %ebx
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pop %esi
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pop %edi
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leave
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ret
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nop
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/
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/ Divide 64-bit (Nhi,Nlo) by 32-bit divisor, which must be normalized
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/ so its high bit is 1. This code is from NSPR.
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/
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/ mp_err s_mpv_div_2dx1d(mp_digit Nhi, mp_digit Nlo, mp_digit divisor,
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/ mp_digit *qp, mp_digit *rp)
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/ esp + 0: Caller's ebx
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/ esp + 4: return address
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/ esp + 8: Nhi argument
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/ esp + 12: Nlo argument
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/ esp + 16: divisor argument
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/ esp + 20: qp argument
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/ esp + 24: rp argument
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/ registers:
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/ eax:
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/ ebx: carry
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/ ecx: a_len
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/ edx:
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/ esi: a ptr
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/ edi: c ptr
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/
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.globl s_mpv_div_2dx1d
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.type s_mpv_div_2dx1d,@function
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s_mpv_div_2dx1d:
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push %ebx
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mov 8(%esp),%edx
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mov 12(%esp),%eax
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mov 16(%esp),%ebx
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div %ebx
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mov 20(%esp),%ebx
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mov %eax,0(%ebx)
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mov 24(%esp),%ebx
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mov %edx,0(%ebx)
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xor %eax,%eax / return zero
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pop %ebx
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ret
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nop
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