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Assembly Source File | 1993-07-13 | 67.4 KB | 1,518 lines

PAGE ,132 ; Name: PARSERA.ASM ; Author: Chuck Ebbert CompuServe [76306,1226] ; internet: 76306.1226@compuserve.com ; Date: 12 July 1993 ; Fast floating-point routines for Fractint. ; Copyright (C) 1992, 1993 Chuck Ebbert. All rights reserved. ; This program is an assembler version of the C 'execution engine' part ; of Mark Peterson's FRACTINT Formula Parser. Many of the operator ; functions were copied from Mark's code in the files FPU087.ASM ; and FPU387.ASM. The basic operator functions are assembler versions ; of the code in PARSER.C. Many 'combined' operators functions were ; added to the program as well. ; This code may be freely distributed and used in non-commercial ; programs provided the author is credited either during program ; execution or in the documentation, and this copyright notice ; is left intact. Sale of this code, or its use in any commercial ; product requires permission from the author. Nominal distribution ; and handling fees may be charged by shareware and freeware ; distributors. ; Chuck Ebbert ; 1915 Blust Ln. ; Enola, PA 17025 .386 ; this only works on a 386 .387 ; with a 387 ifdef ??version masm51 quirks endif ARGSZ equ 16 ; size of complex arg ;;;ARGSZ equ 32 ; size of hypercomplex arg CPFX equ 4 ; size of constarg prefix CARG equ CPFX+ARGSZ ; size of constarg LASTSQR equ CARG*4+CPFX ; offset of lastsqr from start of v ; --------------------------------------------------------------------------- FRAME MACRO regs ; build a stack frame push bp mov bp, sp IRP reg, <regs> push reg ENDM ENDM UNFRAME MACRO regs ; unframe before return IRP reg, <regs> pop reg ENDM pop bp ENDM ; --------------------------------------------------------------------------- ; Pop a number of scalars from the FPU stack. ; Generate as many 'fcompp' instr.'s as possible. ; Then a 'fstp st(0)' if needed. POP_STK MACRO StkPop NumToPop = StkPop SHR 1 REPT NumToPop fcompp ENDM NumToPop = StkPop - ( NumToPop SHL 1 ) REPT NumToPop fstp st(0) ENDM ENDM ; Uncomment the following line to enable compiler code generation. ;;;COMPILER EQU 1 ; --------------------------------------------------------------------------- ; Generate beginning code for operator fn. BEGN_OPER MACRO OperName ifdef COMPILER ;; generate the fixups for compiler ;; size of fn. db Size_&OperName ;; offset of x fixup db XFixup_&OperName ;; offset of y fixup db YFixup_&OperName ;; offset of included(called) fn db Incl_&OperName ;; addr of fn to include dw IAddr_&OperName ;; size of fn to include db ILen_&OperName else ;; only align when no compiler align 4 endif ;; always generate public and begin of proc public _fStk&OperName _fStk&OperName proc near ENDM ; --------------------------------------------------------------------------- ; Generate end of operator fn. code. ; END_OPER MACRO OperName ifndef COMPILER ;; gen a return instr. ret else ;; gen a jump label End_&OperName: ;; generate zero for fixups not generated during fn. ifndef Incl_&OperName ;; No included operator. Generate zero offset, address, and size. Incl_&OperName EQU 0 IAddr_&OperName EQU 0 ILen_&OperName EQU 0 endif ifndef XFixup_&OperName ;; No X fixup. XFixup_&OperName EQU 0 endif ifndef YFixup_&OperName ;; No Y fixup YFixup_&OperName EQU 0 endif endif ;; Always gen size of fn Size_&OperName EQU $ - _fStk&OperName ;; and end of procedure. _fStk&OperName endp ENDM ; --------------------------------------------------------------------------- ; Generate beginning code for 'included' operator fn. ; No fixups here. BEGN_INCL MACRO OperName ifndef COMPILER ;; No align for 'compiler' mode. align 4 endif ;; Generate public (incl fns. can be called directly) and begin of proc. public _fStk&OperName _fStk&OperName proc near ENDM ; --------------------------------------------------------------------------- ; Generate end of 'included' operator fn. code. END_INCL MACRO OperName ifndef COMPILER ;; generate return ret else ;; generate label for jump to end of fn. End_&OperName: endif ;; always generate actual size of fn. Size_&OperName EQU $ - _fStk&OperName ;; always generate end-of-proc _fStk&OperName endp ENDM ; --------------------------------------------------------------------------- ; 'Include' a function inside another one INCL_OPER MACRO CallingOper,OperToIncl ifdef COMPILER ;; Offset of include in outer fn. Incl_&CallingOper EQU $ - _fStk&CallingOper ;; Address of included fn. IAddr_&CallingOper EQU _fStk&OperToIncl ;; Length of included fn. ILen_&CallingOper EQU Size_&OperToIncl else ;; Generate a call to the included fn. call _fStk&OperToIncl endif ENDM ; --------------------------------------------------------------------------- ; Exit early from an operator function. EXIT_OPER MACRO FnToExit ifdef COMPILER ;; jump to end of operator fn jmp short End_&FnToExit else ;; return to caller ret endif ENDM ; --------------------------------------------------------------------------- ; Generate an FPU instruction and a fixup. ; AddrToFix is = X or Y FIXUP MACRO OperName, InstrToFix, Addr ifdef COMPILER ;; Generate a fixup as an offset from start of fn. ;; This is why no includes allowed before a fixup. ;; Fixup is two bytes into the instruction, thus the '+ 2'. ;; This may not be true for all instructions. ifidni <Addr>, <X> XFixup_&OperName EQU $ - _fStk&OperName + 2 else ;; assume fixup is for y YFixup_&OperName EQU $ - _fStk&OperName + 2 endif ;; Generate a load, store or whatever of any convenient value using DS. &InstrToFix QWORD PTR ds:_fLastOp else ifidni <Addr>, <X> ;; Gen load of X using SI. &InstrToFix QWORD PTR [si] else ;; Assume fixup is for y, use SI+8. &InstrToFix QWORD PTR [si+8] endif endif ENDM ; --------------------------------------------------------------------------- ; Align 4 if no compiler. PARSALIGN macro AlignFn ifndef COMPILER align 4 endif ENDM ; --------------------------------------------------------------------------- ; external functions extrn _TranspPerPixel:far ; --------------------------------------------------------------------------- _DATA segment word public use16 'DATA' extrn _maxit:WORD extrn _inside:WORD extrn _outside:WORD extrn _color:WORD extrn _realcolor:WORD extrn _kbdcount:WORD ; keyboard counter extrn _dotmode:WORD extrn __1_:QWORD, _PointFive:QWORD, __2_:QWORD, _infinity:QWORD extrn _LastOp:WORD, _LastInitOp:WORD extrn _InitOpPtr:WORD, _InitStoPtr:WORD, _InitLodPtr:WORD extrn _s:WORD extrn _OpPtr:WORD, _LodPtr:WORD, _StoPtr:WORD extrn _Load:DWORD, _Store:DWORD extrn _FormName:byte extrn _dy1:DWORD, _dx1:DWORD, _dy0:DWORD, _dx0:DWORD extrn _new:WORD, _old:WORD extrn _overflow:WORD extrn _col:WORD, _row:WORD extrn _Transparent3D:WORD extrn _Arg1:WORD, _Arg2:WORD extrn _f:DWORD, _pfls:DWORD, _v:DWORD _DATA ends _BSS segment word public use16 'BSS' _fLastOp label DWORD ; save seg, offset of lastop here dd ? _PtrToZ label WORD dw ? _BSS ends DGROUP group _DATA,_BSS ; --------------------------------------------------------------------------- ; Operator Functions follow. ; --------------------------------------------------------------------------- ; NOTE: None of these operator functions may change any registers but ; ax and si. The exceptions are those functions that update ; the current values of the 'status' regs as needed. ; On entry to these functions: ; FPU stack is used as the evaluation stack. ; The FPU stack can overflow into memory. Accuracy is not lost but ; calculations are slower. ; es -> DGROUP ; ds -> seg pfls, seg v ; cx -> lastop ; dx == orbit counter (if calcfrmfpasm is running) ; di -> stack overflow area, used by push and pull functions ; bx -> current operator, operand pair ; [bx] = operator function address, i.e. addr. of current '_fStkXXX' ; [bx+2] = operand pointer or zero if no operand ; si = operand pointer (loaded from [bx+2] before call of operator fn.) ; New rules Feb 1993: ; 1. No EXIT_OPER before an INCL_OPER. ; 2. No jumps can be made past an included function. ; 2. No included fn may include another, or have any fixups. ; 3. Only one included fn. allowed per 'normal' fn. ; 4. Fixups must be before any included fn. ; -------------------------------------------------------------------------- ; Put this code in PARSERFP.C's code segment. PARSERFP_TEXT segment para public use16 'CODE' ; Non-standard segment register setup. assume es:DGROUP, ds:nothing, cs:PARSERFP_TEXT ; -------------------------------------------------------------------------- ; Included functions must be first. ; -------------------------------------------------------------------------- BEGN_INCL Log ; Log ; From FPU387.ASM ; Log is called by Pwr and is also called directly. ftst fstsw ax sahf jnz short NotBothZero fxch ; y x ftst fstsw ax sahf fxch ; x y jnz short NotBothZero POP_STK 2 ; clear two numbers fldz fldz EXIT_OPER Log ; return (0,0) PARSALIGN NotBothZero: fld st(1) ; y x y fld st(1) ; x y x y fpatan ; z.y x y fxch st(2) ; y x z.y fmul st,st(0) ; yy x z.y fxch ; x yy z.y fmul st,st(0) ; xx yy z.y fadd ; mod z.y fldln2 ; ln2, mod, z.y fmul _PointFive ; ln2/2, mod, z.y fxch ; mod, ln2/2, z.y fyl2x ; z.x, z.y END_INCL Log ; -------------------------------------------------------------------------- BEGN_INCL SinhCosh ; Included fn, Sinh, Cosh of st ; From FPU087.ASM with mods to use less registers. fstcw _Arg2 ; use arg2 to hold CW fwait fldln2 ; ln(2) x fdivp st(1),st ; x/ln(2), start the fdivr instr. mov ax,_Arg2 ; Now do some integer instr.'s push ax ; Save control word on stack or ax,0000110000000000b mov _Arg2,ax fldcw _Arg2 ; Set control to round towards zero ftst ; save the sign of x in ax fstsw ax ; sahf instr. is below fabs ; |x|/ln2 fld st ; |x|/ln(2), |x|/ln(2) frndint ; int = integer(|x|/ln(2)), |x|/ln(2) fxch ; |x|/ln(2), int fsub st,st(1) ; rem < 1.0, int fmul _PointFive ; rem/2 < 0.5, int f2xm1 ; (2**(rem/2))-1, int fadd __1_ ; 2**(rem/2), int fmul st,st ; 2**rem, int sahf ; ah has result of ftst above fscale ; e**|x|, int fstp st(1) ; e**|x| jae short ExitFexp ; skip divide if x was >= 0 fdivr __1_ ; e**x PARSALIGN ExitFexp: fld st ; e**x, e**x fmul _PointFive ; e^x/2 e^x fstp QWORD PTR es:[di] ; e^x use overflow stk for temp here fdivr _PointFive ; e**-x/2 pop ax ; restore old CW to Arg2 after fdivr mov _Arg2,ax fld st ; e**-x/2, e**-x/2 fadd QWORD PTR es:[di] ; coshx, e**-x/2 fxch ; e^-x/2, coshx fsubr QWORD PTR es:[di] ; sinhx, coshx fldcw _Arg2 ; Restore control word END_INCL SinhCosh ; -------------------------------------------------------------------------- BEGN_OPER Conj ; Complex conjugate fxch ; y x ... fchs ; y=-y x ... fxch ; x y ... END_OPER Conj ; -------------------------------------------------------------------------- BEGN_OPER Real ; Real fstp st(1) ; x ... fldz ; 0 x ... fxch ; x 0 ... END_OPER Real ; -------------------------------------------------------------------------- BEGN_OPER RealFlip ; Real, flip combined. fstp st(1) ; y=x ... fldz ; x=0 y ... END_OPER RealFlip ; -------------------------------------------------------------------------- BEGN_OPER Add ; Add faddp st(2),st ; Arg2->d.x += Arg1->d.x; faddp st(2),st ; Arg2->d.y += Arg1->d.y; END_OPER Add ; -------------------------------------------------------------------------- BEGN_OPER Sub ; Subtract fsubp st(2),st ; Arg2->d.x -= Arg1->d.x; fsubp st(2),st ; Arg2->d.y -= Arg1->d.y; END_OPER Sub ; -------------------------------------------------------------------------- BEGN_OPER LodRealAdd ; Load, Real, Add combined FIXUP LodRealAdd, fadd, X ; Add x-value from memory END_OPER LodRealAdd ; -------------------------------------------------------------------------- BEGN_OPER LodRealSub ; Load, Real, Subtract combined FIXUP LodRealSub, fsub, X ; (fsub qword ptr X) END_OPER LodRealSub ; -------------------------------------------------------------------------- BEGN_OPER Real2 ; Real value (fast version) fldz ; 0 x y ... (uses a reg) fstp st(2) ; x 0 ... END_OPER Real2 ; -------------------------------------------------------------------------- BEGN_OPER Lod ; Load FIXUP Lod, fld, Y ; y ... FIXUP Lod, fld, X ; x y ... END_OPER Lod ; -------------------------------------------------------------------------- BEGN_OPER Clr1 ; Clear stack fninit END_OPER Clr1 ; -------------------------------------------------------------------------- BEGN_OPER Imag ; Imaginary value POP_STK 1 ; y fldz ; 0 y fxch ; x=y 0 END_OPER Imag ; -------------------------------------------------------------------------- BEGN_OPER ImagFlip ; Imaginary value, flip combined POP_STK 1 ; y ... fldz ; x=0 y ... END_OPER ImagFlip ; -------------------------------------------------------------------------- BEGN_OPER Abs ; Absolute value fxch fabs fxch fabs END_OPER Abs ; -------------------------------------------------------------------------- BEGN_OPER LodRealMul ; Load, Real, Multiply FIXUP LodRealMul, fld, X ; y.x x.x x.y fmul st(2),st ; y.x x.x z.y fmul ; z.x z.y END_OPER LodRealMul ; -------------------------------------------------------------------------- BEGN_OPER Neg ; Negative fxch fchs ; Arg1->d.y = -Arg1->d.y; fxch fchs END_OPER Neg ; -------------------------------------------------------------------------- BEGN_OPER EndInit ; End of initialization expr. fninit mov _LastInitOp,bx ; LastInitOp=OpPtr END_OPER EndInit ; -------------------------------------------------------------------------- BEGN_OPER StoClr1 ; Store, clear FPU FIXUP StoClr1, fstp, X ; y ... FIXUP StoClr1, fst, Y ; y ... finit ; use finit, not fninit END_OPER StoClr1 ; -------------------------------------------------------------------------- BEGN_OPER Sto ; Store, leave on ST fxch ; y x ... FIXUP Sto, fst, Y fxch ; x y ... FIXUP Sto, fst, X fwait ; to be safe END_OPER Sto ; -------------------------------------------------------------------------- BEGN_OPER Sto2 ; Store, leave on ST (uses a reg) fld st(1) ; y x y FIXUP Sto2, fstp, Y ; x y FIXUP Sto2, fst, X ; FWAIT should not be needed here since next operator is never Clr. END_OPER Sto2 ; -------------------------------------------------------------------------- BEGN_OPER LodReal ; Load a real fldz ; 0 ... FIXUP LodReal, fld, X ; x 0 ... END_OPER LodReal ; -------------------------------------------------------------------------- BEGN_OPER LodRealC ; Load real const fldz ; y=0 ... FIXUP LodRealC, fld, X ; x 0 ... END_OPER LodRealC ; -------------------------------------------------------------------------- BEGN_OPER LodRealFlip ; Load real, flip FIXUP LodRealFlip, fld, X ; y=x ... fldz ; x=0 y ... END_OPER LodRealFlip ; -------------------------------------------------------------------------- BEGN_OPER LodRealAbs ; Load real, abs fldz ; 0 ... FIXUP LodRealAbs, fld, X ; x 0 ... fabs ; x=abs(x) 0 ... END_OPER LodRealAbs ; -------------------------------------------------------------------------- BEGN_OPER Flip ; Exchange real, imag fxch ; x=y y=x ... END_OPER Flip ; -------------------------------------------------------------------------- BEGN_OPER LodImag ; Load, imaginary fldz ; 0 ... FIXUP LodImag, fld, Y ; x=y 0 END_OPER LodImag ; -------------------------------------------------------------------------- BEGN_OPER LodImagFlip ; Load, imaginary, flip FIXUP LodImagFlip, fld, Y ; y ... fldz ; 0 y ... END_OPER LodImagFlip ; -------------------------------------------------------------------------- BEGN_OPER LodImagAbs ; Load, imaginary, absolute value fldz ; 0 ... FIXUP LodImagAbs, fld, Y ; x=y 0 ... fabs ; x=abs(y) 0 ... END_OPER LodImagAbs ; -------------------------------------------------------------------------- BEGN_OPER LodConj ; Load, conjugate FIXUP LodConj, fld, Y ; y ... fchs ; y=-y ... FIXUP LodConj, fld, X ; x y ... END_OPER LodConj ; -------------------------------------------------------------------------- BEGN_OPER LodAdd ; Load, Add (uses a reg) FIXUP LodAdd, fadd, X FIXUP LodAdd, fld, Y faddp st(2),st END_OPER LodAdd ; -------------------------------------------------------------------------- BEGN_OPER LodSub ; Load, Subtract (uses a reg) FIXUP LodSub, fsub, X FIXUP LodSub, fld, Y fsubp st(2),st END_OPER LodSub ; -------------------------------------------------------------------------- BEGN_OPER StoDup ; Store, duplicate top operand FIXUP StoDup, fst, X ; x y fld st(1) ; y x y FIXUP StoDup, fst, Y ; y x y fld st(1) ; x y x y END_OPER StoDup ; -------------------------------------------------------------------------- BEGN_OPER StoDbl ; Store, double (uses a reg) FIXUP StoDbl, fst, X ; x y (store x) fadd st,st ; 2x y fld st(1) ; y 2x y FIXUP StoDbl, fst, Y ; y 2x y (store y) faddp st(2),st ; 2x 2y END_OPER StoDbl ; -------------------------------------------------------------------------- BEGN_OPER LodSubMod ; Load, Subtract, Mod FIXUP LodSubMod, fsub, X ; x.x-y.x x.y ... fmul st,st ; sqr(x.x-y.x) x.y ... fldz ; 0 sqrx x.y ... fxch st(2) ; x.y sqrx 0 ... FIXUP LodSubMod, fsub, Y ; x.y-y.y sqrx 0 ... fmul st,st ; sqry sqrx 0 ... fadd ; mod 0 END_OPER LodSubMod ; -------------------------------------------------------------------------- BEGN_OPER Sqr ; Square, save magnitude in LastSqr fld st(0) ; x x y fmul st(1),st ; x x*x y fmul st,st(2) ; xy xx y mov si, WORD PTR _v ; si -> variables fadd st,st(0) ; 2xy xx y fxch st(2) ; y xx 2xy fmul st,st(0) ; yy xx 2xy fld st(1) ; xx yy xx 2xy fadd st,st(1) ; xx+yy yy xx 2xy fstp QWORD PTR [si+LASTSQR] ; yy xx 2xy fsubp st(1),st ; xx-yy 2xy END_OPER Sqr ; -------------------------------------------------------------------------- BEGN_OPER Sqr0 ; Square, don't save magnitude fld st(0) ; x x y fld st(0) ; x x x y fmul st,st(3) ; xy x x y fadd st,st ; 2xy x x y fxch st(3) ; y x x 2xy fadd st(2),st ; y x x+y 2xy fsubp st(1),st ; x-y x+y 2xy fmulp st(1),st ; xx-yy 2xy END_OPER Sqr0 ; -------------------------------------------------------------------------- BEGN_OPER Mul ; Multiply ; From FPU087.ASM fld st(1) ; y.y, y.x, y.y, x.x, x.y fmul st,st(4) ; y.y*x.y, y.x. y.y, x.x, x.y fld st(1) ; y.x, y.y*x.y, y.x, y.y, x.x, x.y fmul st,st(4) ; y.x*x.x,y.y*x.y,y.x y.y,x.x,x.y fsubr ; newx=y.x*x.x-y.y*x.y,y.x,y.y,x.x,x.y fxch st(3) ; x.x, y.x, y.y, newx, x.y fmulp st(2),st ; y.x, y.y*x.x, newx, x.y fmulp st(3),st ; y.y*x.x, newx, y.x*x.y faddp st(2),st ; newx newy = y.x*x.y + x.x*y.y END_OPER Mul ; -------------------------------------------------------------------------- BEGN_OPER LodMul ; Load, Multiply ; This is just load followed by multiply but it saves a fn. call. FIXUP LodMul, fld, Y ; y.y x.x x.y FIXUP LodMul, fld, X ; y.x y.y x.x x.y fld st(1) ; y.y, y.x, y.y, x.x, x.y fmul st,st(4) ; y.y*x.y, y.x. y.y, x.x, x.y fld st(1) ; y.x, y.y*x.y, y.x, y.y, x.x, x.y fmul st, st(4) ; y.x*x.x, y.y*x.y, y.x, y.y, x.x, x.y fsubr ; newx=y.x*x.x-y.y*x.y,y.x,y.y,x.x,x.y fxch st(3) ; x.x, y.x, y.y, newx, x.y fmulp st(2), st ; y.x, y.y*x.x, newx, x.y fmulp st(3), st ; y.y*x.x, newx, y.x*x.y faddp st(2), st ; newx newy = y.x*x.y + x.x*y.y END_OPER LodMul ; -------------------------------------------------------------------------- BEGN_OPER Div ; Divide ; From FPU087.ASM with speedups fld st(1) ; y.y,y.x,y.y,x.x,x.y fmul st,st ; y.y*y.y,y.x,y.y,x.x,x.y fld st(1) ; y.x,y.y*y.y,y.x,y.y,x.x,x.y fmul st,st ; y.x*y.x,y.y*y.y,y.x,y.y,x.x,x.y fadd ; mod,y.x,y.y,x.x,x.y ftst fstsw ax sahf jz short DivNotOk ; can't do this divide until now fdiv st(1),st ; mod,y.x=y.x/mod,y.y,x.x,x.y fdivp st(2),st ; y.x,y.y=y.y/mod,x.x,x.y fld st(1) ; y.y,y.x,y.y,x.x,x.y fmul st,st(4) ; y.y*x.y,y.x,y.y,x.x,x.y fld st(1) ; y.x,y.y*x.y,y.x,y.y,x.x,x.y fmul st,st(4) ; y.x*x.x,y.y*x.y,y.x,y.y,x.x,x.y fadd ; y.x*x.x+y.y*x.y,y.x,y.y,x.x,x.y fxch st(3) ; x.x,y.x,y.y,newx,x.y fmulp st(2),st ; y.x,y.y*x.x,newx,x.y fmulp st(3),st ; x.x*y.y,newx,y.x*x.y fsubp st(2),st ; newx,newy EXIT_OPER Div DivNotOk: POP_STK 5 ; clear 5 from stack (!) fld _infinity ; return a very large number fld st(0) END_OPER Div ; -------------------------------------------------------------------------- BEGN_OPER Recip ; Reciprocal ; From FPU087.ASM fld st(1) ; y, x, y fmul st,st ; y*y, x, y fld st(1) ; x, y*y, x, y fmul st,st ; x*x, y*y, x, y fadd ; mod, x, y ftst fstsw ax sahf jz short RecipNotOk fdiv st(1),st ; mod, newx=x/mod, y fchs ; -mod newx y fdivp st(2),st ; newx, newy=y/-mod EXIT_OPER Recip RecipNotOk: POP_STK 3 ; clear three from stack fld _infinity ; return a very large number fld st(0) END_OPER Recip ; -------------------------------------------------------------------------- BEGN_OPER StoSqr ; Sto, Square, save magnitude fld st(0) ; x x y FIXUP StoSqr, fst, X ; " (store x) fmul st(1),st ; x x*x y fmul st,st(2) ; xy xx y fadd st,st(0) ; 2xy xx y fxch st(2) ; y xx 2xy FIXUP StoSqr, fst, Y ; " (store y) fmul st,st(0) ; yy xx 2xy ; It is now safe to overlay si here mov si, WORD PTR _v ; si -> variables fld st(1) ; xx yy xx 2xy fadd st,st(1) ; xx+yy yy xx 2xy fstp QWORD PTR [si+LASTSQR] ; yy xx 2xy fsubp st(1),st ; xx-yy 2xy END_OPER StoSqr ; -------------------------------------------------------------------------- BEGN_OPER StoSqr0 ; Sto, Square, don't save magnitude fld st(0) ; x x y FIXUP StoSqr0, fst, X ; store x fld st(0) ; x x x y fmul st,st(3) ; xy x x y fadd st,st ; 2xy x x y fxch st(3) ; y x x 2xy FIXUP StoSqr0, fst, Y ; store y fadd st(2),st ; y x x+y 2xy fsubp st(1),st ; x-y x+y 2xy fmulp st(1),st ; xx-yy 2xy END_OPER StoSqr0 ; -------------------------------------------------------------------------- BEGN_OPER Mod2 ; Modulus (uses a reg) fmul st,st ; xx y fldz ; 0 xx y fxch st(2) ; y xx 0 fmul st,st ; yy xx 0 fadd ; mod 0 END_OPER Mod2 ; -------------------------------------------------------------------------- BEGN_OPER LodMod2 ; Load, Modulus (uses a reg) fldz ; 0 ... FIXUP LodMod2, fld, X ; x 0 ... fmul st,st ; xx 0 FIXUP LodMod2, fld, Y ; y xx 0 fmul st,st ; yy xx 0 fadd ; mod 0 END_OPER LodMod2 ; -------------------------------------------------------------------------- BEGN_OPER StoMod2 ; Store, Modulus (uses a reg) FIXUP StoMod2, fst, X ; x y fmul st,st ; xx y fldz ; 0 xx y fxch st(2) ; y xx 0 FIXUP StoMod2, fst, Y ; y xx 0 fmul st,st ; yy xx 0 fadd ; mod 0 END_OPER StoMod2 ; -------------------------------------------------------------------------- BEGN_OPER Clr2 ; Test ST, clear FPU ftst fstsw ax fninit and ah,01000000b ; return 1 if zf=1 shr ax,14 ; AX will be returned by fFormula() END_OPER Clr2 ; -------------------------------------------------------------------------- BEGN_OPER PLodAdd ; Load, Add (uses no regs) fxch ; y x FIXUP PLodAdd, fadd, Y ; add y from memory fxch ; x y FIXUP PLodAdd, fadd, X ; add x, overlap execution END_OPER PLodAdd ; -------------------------------------------------------------------------- BEGN_OPER PLodSub ; Load, Subtract (uses no regs) fxch FIXUP PLodSub, fsub, Y ; sub y from memory fxch ; x y FIXUP PLodSub, fsub, X ; sub x, overlap execution END_OPER PLodSub ; -------------------------------------------------------------------------- BEGN_OPER LodDup ; Load, duplicate FIXUP LodDup, fld, Y ; y ... FIXUP LodDup, fld, X ; x y ... fld st(1) ; y x y ... fld st(1) ; x y x y ... END_OPER LodDup ; -------------------------------------------------------------------------- BEGN_OPER LodSqr ; Load, square (no save lastsqr) FIXUP LodSqr, fld, Y ; y ... fld st(0) ; y y ... fadd st(1),st ; y 2y ... fld st(0) ; y y 2y FIXUP LodSqr, fld, X ; x y y 2y ... fmul st(3),st ; x y y 2xy ... fadd st(2),st ; x y X+y 2xy ... fsubrp st(1),st ; x-y x+y 2xy ... fmul ; xx-yy 2xy ... END_OPER LodSqr ; -------------------------------------------------------------------------- BEGN_OPER LodSqr2 ; Load, square (save lastsqr) FIXUP LodSqr2, fld, Y ; y ... fld st(0) ; y y ... fadd st(1),st ; y 2y ... fmul st,st(0) ; yy 2y ... FIXUP LodSqr2, fld, X ; x yy 2y ... fmul st(2),st ; x yy 2xy ... mov si,WORD PTR _v ; put address of v in si fmul st,st(0) ; xx yy 2xy ... fld st(0) ; xx xx yy 2xy fadd st,st(2) ; mod xx yy 2xy fstp QWORD PTR [si+LASTSQR] ; xx yy 2xy ... (save lastsqr) fsubrp st(1),st ; xx-yy 2xy ... END_OPER LodSqr2 ; -------------------------------------------------------------------------- BEGN_OPER LodDbl ; Load, double FIXUP LodDbl, fld, Y ; load y fadd st,st(0) ; double it FIXUP LodDbl, fld, X ; same for x fadd st,st(0) END_OPER LodDbl ; -------------------------------------------------------------------------- BEGN_OPER Mod ; Modulus (uses no regs) fmul st,st ; x*x y fxch ; y x*x fmul st,st ; y*y x*x fadd ; mod fldz ; 0 mod fxch ; mod 0 END_OPER Mod ; -------------------------------------------------------------------------- ; The following code was 'discovered' by experimentation. The Intel manuals ; really don't help much in writing this kind of code. ; -------------------------------------------------------------------------- BEGN_OPER Push2 ; Push stack down from 8 to 6 fdecstp ; roll the stack fdecstp ; ... fstp tbyte PTR es:[di] ; store x on overflow stack fstp tbyte PTR es:[di+10] ; and y (ten bytes each) add di,20 ; adjust di END_OPER Push2 ; -------------------------------------------------------------------------- BEGN_OPER Pull2 ; Pull stack up from 2 to 4 fld tbyte PTR es:[di-10] ; oldy x y sub di,20 ; adjust di fxch st(2) ; y x oldy fld tbyte PTR es:[di] ; oldx y x oldy fxch st(2) ; x y oldx oldy END_OPER Pull2 ; -------------------------------------------------------------------------- BEGN_OPER Push4 ; Push stack down from 8 to 4 fdecstp ; roll the stack four times fdecstp fdecstp fdecstp fstp tbyte PTR es:[di+20] ; save the bottom four numbers fstp tbyte PTR es:[di+30] ; save full precision on overflow fstp tbyte PTR es:[di] fstp tbyte PTR es:[di+10] add di,40 ; adjust di END_OPER Push4 ; -------------------------------------------------------------------------- BEGN_OPER Push2a ; Push stack down from 6 to 4 fdecstp ; roll the stack 4 times fdecstp fdecstp fdecstp fstp tbyte PTR es:[di] ; save only two numbers fstp tbyte PTR es:[di+10] add di, 20 fincstp ; roll back 2 times fincstp END_OPER Push2a ; -------------------------------------------------------------------------- ; End of stack overflow/underflow code. ; -------------------------------------------------------------------------- BEGN_OPER Exp ; Exponent ; From FPU387.ASM with mods to use less registers. fstp QWORD PTR es:[di] ; y fsincos ; cosy, siny fld1 ; 1, cos, sin fldln2 ; ln2, 1, cos, sin fdivr QWORD PTR es:[di] ; x.x/ln2, 1, cos, sin fst QWORD PTR es:[di] fprem ; prem, 1, cos, sin f2xm1 ; e**prem-1, 1, cos, sin fadd ; e**prem, cos, sin fld QWORD PTR es:[di] ; x.x/ln2, e**prem, cos, sin fxch ; e**prem, x.x/ln2, cos, sin fscale ; e**x.x, x.x/ln2, cos, sin fstp st(1) ; e**x.x, cos, sin fmul st(2),st ; e**x.x, cos, z.y fmul ; z.x, z.y END_OPER Exp ; -------------------------------------------------------------------------- BEGN_OPER Pwr ; Power ; First exchange the top two complex numbers. fxch st(2) ; x.x y.y y.x x.y fxch ; y.y x.x y.x x.y fxch st(3) ; x.y x.x y.x y.y fxch ; x.x x.y y.x y.y ; Now take the log of the # on st. INCL_OPER Pwr, Log ; l.x l.y y.x y.y ; Inline multiply function from FPU087.ASM instead of include. fld st(1) ; y.y, y.x, y.y, x.x, x.y fmul st,st(4) ; y.y*x.y, y.x. y.y, x.x, x.y fld st(1) ; y.x, y.y*x.y, y.x, y.y, x.x, x.y fmul st,st(4) ; y.x*x.x, y.y*x.y, y.x, y.y, x.x, x.y fsubr ; newx = y.x*x.x - y.y*x.y, y.x, y.y, x.x, x.y fxch st(3) ; x.x, y.x, y.y, newx, x.y fmulp st(2),st ; y.x, y.y*x.x, newx, x.y fmulp st(3),st ; y.y*x.x, newx, y.x*x.y faddp st(2),st ; newx newy = y.x*x.y + x.x*y.y ; Exp function from FPU387.ASM with mods to use less registers. fstp QWORD PTR es:[di] ; y fsincos ; cosy, siny fld1 ; 1, cos, sin fldln2 ; ln2, 1, cos, sin fdivr QWORD PTR es:[di] ; x.x/ln2, 1, cos, sin fst QWORD PTR es:[di] fprem ; prem, 1, cos, sin f2xm1 ; e**prem-1, 1, cos, sin fadd ; e**prem, cos, sin fld QWORD PTR es:[di] ; x.x/ln2, e**prem, cos, sin fxch ; e**prem, x.x/ln2, cos, sin fscale ; e**x.x, x.x/ln2, cos, sin fstp st(1) ; e**x.x, cos, sin fmul st(2),st ; e**x.x, cos, z.y fmul ; z.x, z.y END_OPER Pwr ; -------------------------------------------------------------------------- BEGN_OPER Cosh ; Cosh INCL_OPER Cosh, SinhCosh ; sinhx coshx y fxch st(2) ; y coshx sinhx fsincos ; cosy siny coshx sinhx fxch ; siny cosy coshx sinhx fmulp st(3),st ; cosy coshx y=sinhx*siny fmulp st(1),st ; x=cosy*coshx y END_OPER Cosh ; -------------------------------------------------------------------------- BEGN_OPER Sinh ; Sinh INCL_OPER Sinh, SinhCosh ; sinhx coshx y fxch st(2) ; y coshx sinhx fsincos ; cosy siny coshx sinhx fmulp st(3),st ; siny coshx x=sinhx*cosy fmulp st(1),st ; y=coshx*siny x fxch ; x y END_OPER Sinh ; -------------------------------------------------------------------------- BEGN_OPER Sin ; Sin fsincos ; cosx sinx y fxch st(2) ; y sinx cosx INCL_OPER Sin, SinhCosh ; sinhy coshy sinx cosx fmulp st(3),st ; coshy sinx y=cosx*sinhy fmulp st(1),st ; x=sinx*coshy y END_OPER Sin ; -------------------------------------------------------------------------- BEGN_OPER Cos ; Cos fsincos ; cosx sinx y fxch st(2) ; y sinx cosx INCL_OPER Cos, SinhCosh ; sinhy coshy sinx cosx fchs ; -sinhy coshy sinx cosx fmulp st(2),st ; coshy y=-sinhy*sinx cosx fmulp st(2),st ; y x=cosx*coshy fxch ; x y END_OPER Cos ; -------------------------------------------------------------------------- BEGN_OPER CosXX ; CosXX fsincos ; cosx sinx y fxch st(2) ; y sinx cosx INCL_OPER CosXX, SinhCosh ; sinhy coshy sinx cosx ; note missing fchs here fmulp st(2),st ; coshy y=sinhy*sinx cosx fmulp st(2),st ; y x=cosx*coshy fxch ; x y END_OPER CosXX ; -------------------------------------------------------------------------- BEGN_OPER Tan ; Tan fadd st,st ; 2x y fsincos ; cos2x sin2x y fxch st(2) ; y sin2x cos2x fadd st,st ; 2y sin2x cos2x INCL_OPER Tan, SinhCosh ; sinh2y cosh2y sin2x cos2x fxch ; cosh2y sinh2y sin2x cos2x faddp st(3),st ; sinhy sinx denom=cos2x+cosh2y fld st(2) ; denom sinh2y sin2x denom fdivp st(2),st ; sinh2y x=sin2x/denom denom fdivrp st(2),st ; x y=sinh2y/denom END_OPER Tan ; -------------------------------------------------------------------------- BEGN_OPER CoTan ; CoTan fadd st,st ; 2x y fsincos ; cos2x sin2x y fxch st(2) ; y sin2x cos2x fadd st,st ; 2y sin2x cos2x INCL_OPER CoTan, SinhCosh ; sinh2y cosh2y sin2x cos2x fxch ; cosh2y sinh2y sin2x cos2x fsubrp st(3),st ; sinh2y sin2x denom=cosh2y-cos2x fld st(2) ; denom sinh2y sin2x denom fdivp st(2),st ; sinh2y x=sin2x/denom denom fchs ; -sinh2y x denom fdivrp st(2),st ; x y=-sinh2y/denom END_OPER CoTan ; -------------------------------------------------------------------------- BEGN_OPER Tanh ; Tanh fadd st,st ; 2x y INCL_OPER Tanh, SinhCosh ; sinh2x cosh2x y fxch st(2) ; y cosh2x sinh2x fadd st,st ; 2y cosh2x sinh2x fsincos ; cos2y sin2y cosh2x sinh2x faddp st(2),st ; sin2y denom=cos2y+cosh2x sinh2x fxch ; denom sin2y sinh2x fdiv st(1),st ; denom y=sin2y/denom sinh2x fdivp st(2),st ; y x=sinh2x/denom fxch ; x y END_OPER Tanh ; -------------------------------------------------------------------------- BEGN_OPER CoTanh ; CoTanh fadd st,st ; 2x y INCL_OPER CoTanh, SinhCosh ; sinh2x cosh2x y fxch st(2) ; y cosh2x sinh2x fadd st,st ; 2y cosh2x sinh2x fsincos ; cos2y sin2y cosh2x sinh2x fsubp st(2),st ; sin2y denom=cosh2x-cos2y sinh2x fchs ; -sin2y denom sinh2x fxch ; denom -sin2y sinh2x fdiv st(1),st ; denom y=-sin2y/denom sinh2x fdivp st(2),st ; y x=sinh2x/denom fxch ; x y END_OPER CoTanh ; -------------------------------------------------------------------------- BEGN_OPER LT ; < ; Arg2->d.x = (double)(Arg2->d.x < Arg1->d.x); fcomp st(2) ; y.y, x.x, x.y, comp arg1 to arg2 fstsw ax POP_STK 3 sahf fldz ; 0 (Arg2->d.y = 0.0;) jbe short LTfalse ; jump if arg1 <= arg2 fld1 ; 1 0 (return arg2 < arg1) EXIT_OPER LT LTfalse: fldz ; 0 0 END_OPER LT ; -------------------------------------------------------------------------- BEGN_OPER LT2 ; LT, set AX, clear FPU ; returns !(Arg2->d.x < Arg1->d.x) in ax fcom st(2) ; compare arg1, arg2 fstsw ax fninit sahf setbe al ; return (Arg1 <= Arg2) in AX xor ah,ah END_OPER LT2 ; -------------------------------------------------------------------------- BEGN_OPER LodLT ; load, LT ; return (1,0) on stack if arg2 < arg1 FIXUP LodLT, fcomp, X ; compare arg2 to arg1, pop st fstsw ax ; y ... POP_STK 1 ; ... sahf fldz ; 0 ... jae short LodLTfalse ; jump when arg2 >= arg1 fld1 ; 1 0 ... EXIT_OPER LodLT LodLTfalse: fldz ; 0 0 ... END_OPER LodLT ; -------------------------------------------------------------------------- BEGN_OPER LodLT2 ; Lod, LT, set AX, clear FPU ; returns !(Arg2->d.x < Arg1->d.x) in ax FIXUP LodLT2, fcom, X ; compare arg2, arg1 fstsw ax fninit ; clear fpu sahf setae al ; set al when arg2 >= arg1 xor ah,ah ; clear ah END_OPER LodLT2 ; ret 0 in ax for true, 1 for false ; -------------------------------------------------------------------------- BEGN_OPER LodLTMul ; Lod, LT, Multiply (needs 4 on stack) ; for '<expr> * ( <expr> < <var> )' ; return number on stack if arg2 < arg1 FIXUP LodLTMul, fcomp, X ; comp Arg2 to Arg1, pop st fstsw ax ; save status POP_STK 1 ; clear 1 from stack sahf jae short LodLTMulfalse ; jump if arg2 >= arg1 EXIT_OPER LodLTMul ; return value on st PARSALIGN LodLTMulfalse: POP_STK 2 ; return (0,0) fldz fldz END_OPER LodLTMul ; -------------------------------------------------------------------------- BEGN_OPER GT ; > ; Arg2->d.x = (double)(Arg2->d.x > Arg1->d.x); fcomp st(2) ; compare arg1, arg2 fstsw ax POP_STK 3 sahf fldz ; 0 (Arg2->d.y = 0.0;) jae short GTfalse ; jump if Arg1 >= Arg2 fld1 ; 1 0, return arg2 > arg1 EXIT_OPER GT GTfalse: fldz ; 0 0 END_OPER GT ; -------------------------------------------------------------------------- BEGN_OPER GT2 ; GT, set AX, clear FPU ; returns !(Arg2->d.x > Arg1->d.x) in ax fcom st(2) ; compare arg1, arg2 fstsw ax fninit sahf setae al ; return (Arg1 >= Arg2) in AX xor ah,ah END_OPER GT2 ; -------------------------------------------------------------------------- BEGN_OPER LodGT ; load, GT ; return (1,0) on stack if arg2 > arg1 FIXUP LodGT, fcomp, X ; compare arg2 to arg1, pop st fstsw ax ; y ... POP_STK 1 ; ... sahf fldz ; 0 ... jbe short LodGTfalse ; jump when arg2 <= arg1 fld1 ; 1 0 ... EXIT_OPER LodGT LodGTfalse: fldz ; 0 0 ... END_OPER LodGT ; -------------------------------------------------------------------------- BEGN_OPER LodGT2 ; Lod, GT, set AX, clear FPU ; returns !(Arg2->d.x > Arg1->d.x) in AX FIXUP LodGT2, fcom, X ; compare arg2, arg1 fstsw ax fninit ; clear fpu sahf setbe al ; set al when arg2 <= arg1 xor ah,ah ; clear ah END_OPER LodGT2 ; ret 0 in ax for true, 1 for false ; -------------------------------------------------------------------------- BEGN_OPER LTE ; <= ; Arg2->d.x = (double)(Arg2->d.x <= Arg1->d.x); fcomp st(2) ; y x y, comp Arg1 to Arg2 fstsw ax ; save status now POP_STK 3 fldz ; 0 (Arg2->d.y = 0.0;) sahf jb short LTEfalse ; jump if arg1 > arg2 fld1 ; 1 0, ret arg2 <= arg1 EXIT_OPER LTE LTEfalse: fldz ; 0 0 END_OPER LTE ; -------------------------------------------------------------------------- BEGN_OPER LTE2 ; LTE, test ST, clear ; return !(Arg2->d.x <= Arg1->d.x) in AX fcom st(2) ; comp Arg1 to Arg2 fstsw ax fninit ; clear stack and ah,1 ; mask cf shr ax,8 ; ax=1 when arg1 < arg1 END_OPER LTE2 ; return (Arg1 < Arg2), ; -------------------------------------------------------------------------- BEGN_OPER LodLTE ; load, LTE ; return (1,0) on stack if arg2 <= arg1 FIXUP LodLTE, fcomp, X ; compare arg2 to arg1, pop st fstsw ax ; y ... POP_STK 1 ; ... sahf fldz ; 0 ... ja short LodLTEfalse ; jump when arg2 > arg1 fld1 ; 1 0 ... EXIT_OPER LodLTE LodLTEfalse: fldz ; 0 0 ... END_OPER LodLTE ; -------------------------------------------------------------------------- BEGN_OPER LodLTE2 ; Load, LTE, test ST, clear ; return !(Arg2->d.x <= Arg1->d.x) in AX FIXUP LodLTE2, fcom, X ; comp Arg2 to Arg1 fstsw ax fninit sahf seta al xor ah,ah ; ax=1 for expr. false END_OPER LodLTE2 ; return (Arg2 > Arg1) ; -------------------------------------------------------------------------- BEGN_OPER LodLTEMul ; Lod, LTE, Multiply (needs 4 on stack) ; for '<expr> * ( <expr> <= <var> )' ; return number on stack if arg2 <= arg1 FIXUP LodLTEMul, fcomp, X ; comp Arg2 to Arg1, pop st fstsw ax ; save status POP_STK 1 ; clear 1 from stack sahf ja short LodLTEMulfalse ; jump if arg2 > arg1 EXIT_OPER LodLTEMul ; return value on st PARSALIGN LodLTEMulfalse: POP_STK 2 ; return (0,0) fldz fldz END_OPER LodLTEMul ; -------------------------------------------------------------------------- BEGN_OPER LodLTEAnd2 ; Load, LTE, AND, test ST, clear ; this is for 'expression && (expression <= value)' ; stack has {arg2.x arg2.y logical.x junk} on entry (arg1 in memory) ; Arg2->d.x = (double)(Arg2->d.x <= Arg1->d.x); FIXUP LodLTEAnd2, fcom, X ; comp Arg2 to Arg1 fstsw ax sahf fxch st(2) ; logical.x arg2.y arg2.x junk ... ja LTEA2RFalse ; right side is false, Arg2 > Arg1 ftst ; now see if left side of expr is true fstsw ax sahf fninit ; clear fpu jz LTEA2LFalse ; jump if left side of && is false xor ax,ax ; return zero in ax for expr true EXIT_OPER LodLTEAnd2 LTEA2RFalse: fninit LTEA2LFalse: mov ax,1 ; return ax=1 for condition false END_OPER LodLTEAnd2 ; -------------------------------------------------------------------------- BEGN_OPER GTE ; >= ; Arg2->d.x = (double)(Arg2->d.x >= Arg1->d.x); fcomp st(2) ; y x y (compare arg1,arg2) fstsw ax POP_STK 3 ; clear 3 from stk sahf fldz ; 0 (Arg2->d.y = 0.0;) ja short GTEfalse ; jmp if arg1 > arg2 fld1 ; 1 0 (return arg2 >= arg1 on stack) EXIT_OPER GTE GTEfalse: fldz ; 0 0 END_OPER GTE ; -------------------------------------------------------------------------- BEGN_OPER LodGTE ; load, GTE ; return (1,0) on stack if arg2 >= arg1 FIXUP LodGTE, fcomp, X ; compare arg2 to arg1, pop st fstsw ax ; y ... POP_STK 1 ; ... fldz ; 0 ... sahf jb short LodGTEfalse ; jump when arg2 < arg1 fld1 ; 1 0 ... EXIT_OPER LodGTE LodGTEfalse: fldz ; 0 0 ... END_OPER LodGTE ; -------------------------------------------------------------------------- BEGN_OPER LodGTE2 ; Lod, GTE, set AX, clear FPU ; return !(Arg2->d.x >= Arg1->d.x) in AX FIXUP LodGTE2, fcom, X ; compare arg2, arg1 fstsw ax fninit ; clear fpu and ah,1 ; mask cf shr ax,8 ; shift it (AX = 1 when arg2 < arg1) END_OPER LodGTE2 ; ret 0 in ax for true, 1 for false ; -------------------------------------------------------------------------- BEGN_OPER EQ ; == ; Arg2->d.x = (double)(Arg2->d.x == Arg1->d.x); fcomp st(2) ; compare arg1, arg2 fstsw ax POP_STK 3 sahf fldz ; 0 (Arg2->d.y = 0.0;) jne short EQfalse ; jmp if arg1 != arg2 fld1 ; 1 0 (ret arg2 == arg1) EXIT_OPER EQ EQfalse: fldz END_OPER EQ ; -------------------------------------------------------------------------- BEGN_OPER LodEQ ; load, EQ ; return (1,0) on stack if arg2 == arg1 FIXUP LodEQ, fcomp, X ; compare arg2 to arg1, pop st fstsw ax ; y ... POP_STK 1 ; ... fldz ; 0 ... sahf jne short LodEQfalse ; jump when arg2 != arg1 fld1 ; 1 0 ... (return arg2 == arg1) EXIT_OPER LodEQ LodEQfalse: fldz ; 0 0 ... END_OPER LodEQ ; -------------------------------------------------------------------------- BEGN_OPER NE ; != ; Arg2->d.x = (double)(Arg2->d.x != Arg1->d.x); fcomp st(2) ; compare arg1,arg2 fstsw ax POP_STK 3 sahf fldz je short NEfalse ; jmp if arg1 == arg2 fld1 ; ret arg2 != arg1 EXIT_OPER NE NEfalse: fldz END_OPER NE ; -------------------------------------------------------------------------- BEGN_OPER LodNE ; load, NE ; return (1,0) on stack if arg2 != arg1 FIXUP LodNE, fcomp, X ; compare arg2 to arg1, pop st fstsw ax ; y ... POP_STK 1 ; ... fldz ; 0 ... sahf je short LodNEfalse ; jump when arg2 == arg1 ; CAE changed above 'jne' to 'je' 9 MAR 1993 fld1 ; 1 0 ... EXIT_OPER LodNE LodNEfalse: fldz ; 0 0 ... END_OPER LodNE ; -------------------------------------------------------------------------- BEGN_OPER OR ; Or ; Arg2->d.x = (double)(Arg2->d.x || Arg1->d.x); ftst ; a1.x a1.y a2.x a2.y ... fstsw ax sahf POP_STK 2 ; a2.x a2.y ... jnz short Arg1True ftst fstsw ax sahf POP_STK 2 ; ... fldz ; 0 ... jz short NoneTrue fld1 ; 1 0 ... EXIT_OPER OR PARSALIGN Arg1True: POP_STK 2 ; ... fldz ; 0 ... fld1 ; 1 0 ... EXIT_OPER OR NoneTrue: ; 0 ... fldz ; 0 0 ... END_OPER OR ; -------------------------------------------------------------------------- BEGN_OPER AND ; And ; Arg2->d.x = (double)(Arg2->d.x && Arg1->d.x); ftst ; a1.x a1.y a2.x a2.y ... fstsw ax sahf POP_STK 2 ; a2.x a2.y ... jz short Arg1False ftst fstsw ax sahf POP_STK 2 ; ... fldz ; 0 ... jz short Arg2False fld1 ; 1 0 ... EXIT_OPER AND Arg1False: POP_STK 2 ; ... fldz ; 0 ... Arg2False: fldz ; 0 0 ... END_OPER AND ; -------------------------------------------------------------------------- BEGN_OPER ANDClr2 ; And, test ST, clear FPU ; for bailouts using <condition> && <condition> ; Arg2->d.x = (double)(Arg2->d.x && Arg1->d.x); ; Returns !(Arg1 && Arg2) in ax ftst ; y.x y.y x.x x.y fstsw ax sahf jz short Arg1False2 fxch st(2) ; x.x y.y y.x x.y ftst fstsw ax sahf fninit jz short Arg2False2 BothTrue2: xor ax,ax EXIT_OPER ANDClr2 Arg1False2: fninit Arg2False2: mov ax, 1 END_OPER ANDClr2 ; -------------------------------------------------------------------------- assume ds:DGROUP, es:nothing ; called once per image public _Img_Setup align 4 _Img_Setup proc near les si,_pfls ; es:si = &pfls[0] mov di,_LastOp ; load index of lastop shl di,2 ; convert to offset mov bx,offset DGROUP:_fLastOp ; set bx for store add di,si ; di = offset lastop mov WORD PTR [bx],di ; save value of flastop mov ax,es ; es has segment value mov WORD PTR [bx+2],ax ; save seg for easy reload mov ax,word ptr _v ; build a ptr to Z add ax,3*CARG+CPFX mov _PtrToZ,ax ; and save it ret _Img_Setup endp ; -------------------------------------------------------------------------- ; orbitcalc function follows ; -------------------------------------------------------------------------- public _fFormula align 16 _fFormula proc far push di ; don't build a frame here mov di,offset DGROUP:_s ; reset this for stk overflow area mov bx,_InitOpPtr ; bx -> one before first token mov ax,ds ; save ds in ax lds cx,_fLastOp ; ds:cx -> one past last token mov es,ax assume es:DGROUP, ds:nothing ; swap es, ds before any fn. calls push si inner_loop: add bx,4 ; point to next pointer pair cmp bx,cx ; time to quit yet? jae short past_loop mov si,WORD PTR [bx+2] ; set si to operand pointer push offset PARSERFP_TEXT:inner_loop jmp WORD PTR [bx] ; jmp to operator fn past_loop: ; NOTE: AX is set by the last operator fn that was called. mov si,_PtrToZ ; ds:si -> z mov di,offset DGROUP:_new ; es:di -> new mov cx,4 rep movsd ; new = z mov bx,es pop si pop di ; restore si, di mov ds,bx ; restore ds before return assume ds:DGROUP, es:nothing ret ; return AX unmodified _fFormula endp ; -------------------------------------------------------------------------- public _fform_per_pixel ; called once per pixel align 4 _fform_per_pixel proc far FRAME <si, di> ; if(!Transparent3D){ cmp _Transparent3D,0 jne abNormal_Pixel ; /* v[5].a.d.x = */ (v[0].a.d.x = dx0[col]+dShiftx); mov ax,_col shl ax,3 les bx,_dx0 add bx,ax fld QWORD PTR es:[bx] mov ax,_row shl ax,3 les bx,_dx1 add bx,ax fadd QWORD PTR es:[bx] les bx,_v fstp QWORD PTR es:[bx+CPFX] ;;;;;;;;;fstp QWORD PTR es:[bx+104] kill this & prev=fstp ; /* v[5].a.d.x = */ (v[0].a.d.y = dy0[row]+dShifty); mov ax,_row shl ax,3 les bx,_dy0 add bx,ax fld QWORD PTR es:[bx] mov ax,_col shl ax,3 les bx,_dy1 add bx,ax fadd QWORD PTR es:[bx] les bx,_v fstp QWORD PTR es:[bx+CPFX+8] ; make this an fstp ;;;;;;;;;fstp QWORD PTR es:[bx+104] ; kill this after_load: mov di,offset DGROUP:_s ; di points to stack overflow area mov ax,ds mov bx,WORD PTR _pfls ; bx -> pfls lds cx,_fLastOp ; cx = offset &f[LastOp],load ds mov es,ax assume es:DGROUP, ds:nothing cmp _LastInitOp,0 je short skip_initloop ; no operators to do here mov _LastInitOp,cx ; lastinitop=lastop align 4 pixel_loop: mov si,WORD PTR [bx+2] ; get address of load or store call WORD PTR [bx] ; (*opptr)() add bx,4 ; ++opptr cmp bx,_LastInitOp jb short pixel_loop skip_initloop: mov ax,es mov ds,ax assume ds:DGROUP, es:nothing ; for the rest of the program sub bx,4 ; make initopptr point 1 token b4 1st mov _InitOpPtr, bx ; InitOptPtr = OpPtr; UNFRAME <di, si> xor ax,ax ret abNormal_Pixel: ; TranspPerPixel(MathType, &v[5].a, &v[6].a); mov ax,WORD PTR _v add ax,6*CARG+CPFX ;v[6].a push WORD PTR _v+2 push ax mov ax,WORD PTR _v add ax,5*CARG+CPFX ;v[5].a push WORD PTR _v+2 push ax push 1 ;_MathType call far PTR _TranspPerPixel add sp,10 ; v[0].a = v[5].a; les bx,_v fld QWORD PTR es:[bx+5*CARG+CPFX] fstp QWORD PTR es:[bx+CPFX] fld QWORD PTR es:[bx+5*CARG+CPFX+8] fstp QWORD PTR es:[bx+CPFX+8] ; } jmp short after_load _fform_per_pixel endp ; -------------------------------------------------------------------------- PARSERFP_TEXT ends end