ORCA-C/CGC.asm
2017-10-21 18:40:19 -05:00

116 lines
3.3 KiB
NASM

mcopy cgc.macros
****************************************************************
*
* CnvSX - Convert floating point to SANE extended
*
* Inputs:
* rec - pointer to a record
*
****************************************************************
*
CnvSX start
rec equ 4 record containing values
rec_real equ 0 disp to real value
rec_ext equ 8 disp to extended (SANE) value
tsc set up DP
phd
tcd
ph4 rec push addr of real number
clc push addr of SANE number
lda rec
adc #rec_ext
tax
lda rec+2
adc #0
pha
phx
fd2x convert TOS to extended
move4 0,4 return
pld
pla
pla
rtl
end
****************************************************************
*
* CnvSC - Convert floating point to SANE comp
*
* Inputs:
* rec - pointer to a record
*
****************************************************************
*
CnvSC start
rec equ 4 record containing values
rec_real equ 0 disp to real value
rec_ext equ 8 disp to extended (SANE) value
rec_cmp equ 18 disp to comp (SANE) value
tsc set up DP
phd
tcd
ph4 rec push addr of real number
clc push addr of SANE number
lda rec
adc #rec_ext
tax
lda rec+2
adc #0
pha
phx
fd2x convert TOS to extended
clc push addr of SANE number
lda rec
adc #rec_ext
tax
lda rec+2
adc #0
pha
phx
clc push addr of COMP number
lda rec
adc #rec_cmp
tax
lda rec+2
adc #0
pha
phx
fx2c convert TOS to extended
move4 0,4 return
pld
pla
pla
rtl
end
****************************************************************
*
* InitLabels - initialize the labels array
*
* Outputs:
* labelTab - initialized
* intLabel - initialized
*
****************************************************************
*
InitLabels start
maxLabel equ 2400
! with labelTab[0] do begin
lda #-1 val := -1;
sta labelTab+6
sta labelTab+8
stz labelTab defined := false;
stz labelTab+2 chain := nil;
stz labelTab+4
! end; {with}
ldx #labelTab for i := 1 to maxLabel do
ldy #labelTab+10 labelTab[i] := labelTab[0];
lda #maxLabel*10-1
mvn labelTab,labelTab
stz intLabel intLabel := 0;
rtl
end