kolibrios/programs/develop/open watcom/trunk/clib/cgsupp/fdmath.asm

151 lines
5.3 KiB
NASM
Raw Normal View History

;*****************************************************************************
;*
;* Open Watcom Project
;*
;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
;*
;* ========================================================================
;*
;* This file contains Original Code and/or Modifications of Original
;* Code as defined in and that are subject to the Sybase Open Watcom
;* Public License version 1.0 (the 'License'). You may not use this file
;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
;* provided with the Original Code and Modifications, and is also
;* available at www.sybase.com/developer/opensource.
;*
;* The Original Code and all software distributed under the License are
;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
;* NON-INFRINGEMENT. Please see the License for the specific language
;* governing rights and limitations under the License.
;*
;* ========================================================================
;*
;* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
;* DESCRIBE IT HERE!
;*
;*****************************************************************************
; These compiler support routines are called by the Fast code generator
; when compiling with the -fpc option.
;
name fdmath
extrn __FDA : near
extrn __FDS : near
extrn __FDM : near
extrn __FDD : near
extrn __FDC : near
_TEXT segment use32 dword public 'CODE'
assume cs:_TEXT
public __FADD
__FADD proc near
push ecx ; save regs
push ebx ; ...
mov ebx,12[esp] ; load op2
mov ecx,16[esp] ; ...
call __FDA ; do the add
pop ebx ; restore regs
pop ecx ; ...
ret 8 ; return and remove op2
__FADD endp
public __FSUB
__FSUB proc near
push ecx ; save regs
push ebx ; ...
mov ebx,12[esp] ; load op2
mov ecx,16[esp] ; ...
call __FDS ; do the subtract
pop ebx ; restore regs
pop ecx ; ...
ret 8 ; return and remove op2
__FSUB endp
public __FSUBR
__FSUBR proc near
push ecx ; save regs
push ebx ; ...
mov ecx,edx ; load op2
mov ebx,eax ; ...
mov eax,12[esp] ; load op1
mov edx,16[esp] ; ...
call __FDS ; do the subtract
pop ebx ; restore regs
pop ecx ; ...
ret 8 ; return and remove op1
__FSUBR endp
public __FMUL
__FMUL proc near
push ecx ; save regs
push ebx ; ...
mov ebx,12[esp] ; load op2
mov ecx,16[esp] ; ...
call __FDM ; do the multiply
pop ebx ; restore regs
pop ecx ; ...
ret 8 ; return and remove op2
__FMUL endp
public __FDIV
__FDIV proc near
push ecx ; save regs
push ebx ; ...
mov ebx,12[esp] ; load op2
mov ecx,16[esp] ; ...
call __FDD ; do the divide
pop ebx ; restore regs
pop ecx ; ...
ret 8 ; return and remove op2
__FDIV endp
public __FDIVR
__FDIVR proc near
push ecx ; save regs
push ebx ; ...
mov ecx,edx ; load op2
mov ebx,eax ; ...
mov eax,12[esp] ; load op1
mov edx,16[esp] ; ...
call __FDD ; do the divide
pop ebx ; restore regs
pop ecx ; ...
ret 8 ; return and remove op1
__FDIVR endp
public __FCMP
__FCMP proc near
push ecx ; save regs
push ebx ; ...
mov ebx,12[esp] ; load op2
mov ecx,16[esp] ; ...
call __FDC ; do the compare
pop ebx ; restore regs
pop ecx ; ...
ret 8 ; return and remove op2
__FCMP endp
public __FCMPR
__FCMPR proc near
push ecx ; save regs
push ebx ; ...
mov ecx,edx ; load op2
mov ebx,eax ; ...
mov eax,12[esp] ; load op1
mov edx,16[esp] ; ...
call __FDC ; do the compare
pop ebx ; restore regs
pop ecx ; ...
ret 8 ; return and remove op1
__FCMPR endp
_TEXT ends
end