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New 32 bit integer library

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This commit is contained in:
Dave Schmenk 2019-12-22 18:44:58 -08:00
parent 4aa8c8da1f
commit 5ca96095cf
1 changed files with 231 additions and 0 deletions
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src/libsrc/int32.pla Normal file
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//
// 32 bit integer math routines
//
include "inc/cmdsys.plh"
//
// Include zero page definitions
//
asm int32Inc
!SOURCE "vmsrc/plvmzp.inc"
ACCUM32 = DSTH+1
end
export asm accum32zero#0
LDA #$00
STA ACCUM32+0
STA ACCUM32+1
STA ACCUM32+2
STA ACCUM32+3
RTS
end
export asm accum32neg#0
LDA #$00
SEC
SBC ACCUM32+0
STA ACCUM32+0
LDA #$00
SBC ACCUM32+1
STA ACCUM32+1
LDA #$00
SBC ACCUM32+2
STA ACCUM32+2
LDA #$00
SBC ACCUM32+3
STA ACCUM32+3
RTS
end
export asm accum32loadi(imm16)#0
LDY #$00
LDA ESTKL+0,X
STA ACCUM32+0
LDA ESTKH+0,X
BPL + ; SIGN EXTEND
DEY
+ STA ACCUM32+1
STY ACCUM32+2
STY ACCUM32+3
INX
RTS
end
export asm accum32load(i32ptr)#0
LDA ESTKL+0,X ; i32PTR
STA SRCL
LDA ESTKH+0,X ; I32PTR
STA SRCL
LDY #$00
LDA (SRC),Y
STA ACCUM32+0
INY
LDA (SRC),Y
STA ACCUM32+1
INY
LDA (SRC),Y
STA ACCUM32+2
INY
LDA (SRC),Y
STA ACCUM32+3
INX
RTS
end
export asm accum32store(i32ptr)#0
LDA ESTKL+0,X ; i32PTR
STA DSTL
LDA ESTKH+0,X ; I32PTR
STA DSTL
LDY #$00
LDA ACCUM32+0
STA (DST),Y
INY
LDA ACCUM32+1
STA (DST),Y
INY
LDA ACCUM32+2
STA (DST),Y
INY
LDA ACCUM32+3
STA (DST),Y
RTS
end
export asm accum32addi(imm16)#0
LDY #$00
LDA ESTKL+0,X ; IMM16
CLC
ADC ACCUM32+0
STA ACCUM32+0
LDA ESTKH+0,X ; IMM16
BPL +
DEY
+ ADC ACCUM32+1
STA ACCUM32+1
TYA
ADC ACCUM32+2
STA ACCUM32+2
TYA
ADC ACCUM32+3
STA ACCUM32+3
INX
RTS
end
export asm accum32add(i32ptr)#0
LDA ESTKL+0,X ; I32PTR
STA SRCL
LDA ESTKH+0,X ; I32PTR
STA SRCL
LDY #$00
LDA (SRC),Y
CLC
ADC ACCUM32+0
STA ACCUM32+0
INY
ADC ACCUM32+1
STA ACCUM32+1
INY
ADC ACCUM32+2
STA ACCUM32+2
INY
ADC ACCUM32+3
STA ACCUM32+3
INX
RTS
end
export asm accum32subi(imm16)#0
LDY #$00
LDA ESTKL+0,X ; IMM16
SEC
SBC ACCUM32+0
STA ACCUM32+0
LDA ESTKH+0,X ; IMM16
BPL +
DEY
+ SBC ACCUM32+1
STA ACCUM32+1
TYA
SBC ACCUM32+2
STA ACCUM32+2
TYA
SBC ACCUM32+3
STA ACCUM32+3
INX
RTS
end
export asm accum32sub(i32ptr)#0
LDA ESTKL+0,X ; I32PTR
STA SRCL
LDA ESTKH+0,X ; I32PTR
STA SRCL
LDY #$00
LDA (SRC),Y
SEC
SBC ACCUM32+0
STA ACCUM32+0
INY
SBC ACCUM32+1
STA ACCUM32+1
INY
SBC ACCUM32+2
STA ACCUM32+2
INY
SBC ACCUM32+3
STA ACCUM32+3
INX
RTS
end
export asm accum32mul(i32ptr)#0
LDA ESTKL+1,X ; I32PTR
STA SRCL
LDA ESTKH+1,X ; I32PTR
STA SRCH
STX ESP
LDX #$00
LDY #$03
STY IPY
LDA #$80
_MULLP PHA
LDY IPY
AND (TMP),Y
BEQ +
LDY #$00
CLC
LDA (SRC),Y
ADC (DST),Y
STA (DST),Y
INY
LDA (SRC),Y
ADC (DST),Y
STA (DST),Y
INY
LDA (SRC),Y
ADC (DST),Y
STA (DST),Y
INY
LDA (SRC),Y
ADC (DST),Y
STA (DST),Y
+ DEX
BEQ ++
LDY #$00
ASL (DST),Y
INY
ROL (DST),Y
INY
ROL (DST),Y
INY
ROL (DST),Y
PLA
LSR
BNE _MULLP
LDA #$80
DEC IPY
_SHLPRD LDY
ASL ESTKL,X ; MULTPLNDL
ROL ESTKH,X ; MULTPLNDH
DEX
BNE _MULLP
STA ESTKH+1,X ; PRODH
LDX ESP
INX
INX
INX
RTS
end