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99 lines
2.0 KiB
Lua
99 lines
2.0 KiB
Lua
; Internal Math library routines - always included by the compiler
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math {
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%asminclude "library:math.asm"
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asmsub sin8u(ubyte angle @A) clobbers(Y) -> ubyte @A {
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%asm {{
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tay
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lda _sinecos8u,y
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rts
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_sinecos8u .byte trunc(128.0 + 127.5 * sin(range(256+64) * rad(360.0/256.0)))
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}}
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}
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asmsub cos8u(ubyte angle @A) clobbers(Y) -> ubyte @A {
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%asm {{
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tay
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lda sin8u._sinecos8u+64,y
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rts
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}}
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}
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asmsub sin8(ubyte angle @A) clobbers(Y) -> byte @A {
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%asm {{
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tay
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lda _sinecos8,y
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rts
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_sinecos8 .char trunc(127.0 * sin(range(256+64) * rad(360.0/256.0)))
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}}
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}
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asmsub cos8(ubyte angle @A) clobbers(Y) -> byte @A {
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%asm {{
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tay
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lda sin8._sinecos8+64,y
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rts
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}}
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}
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asmsub sinr8u(ubyte radians @A) clobbers(Y) -> ubyte @A {
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%asm {{
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tay
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lda _sinecosR8u,y
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rts
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_sinecosR8u .byte trunc(128.0 + 127.5 * sin(range(180+45) * rad(360.0/180.0)))
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}}
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}
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asmsub cosr8u(ubyte radians @A) clobbers(Y) -> ubyte @A {
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%asm {{
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tay
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lda sinr8u._sinecosR8u+45,y
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rts
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}}
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}
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asmsub sinr8(ubyte radians @A) clobbers(Y) -> byte @A {
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%asm {{
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tay
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lda _sinecosR8,y
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rts
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_sinecosR8 .char trunc(127.0 * sin(range(180+45) * rad(360.0/180.0)))
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}}
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}
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asmsub cosr8(ubyte radians @A) clobbers(Y) -> byte @A {
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%asm {{
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tay
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lda sinr8._sinecosR8+45,y
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rts
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}}
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}
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asmsub rnd() -> ubyte @A {
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%asm {{
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jmp math.randbyte
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}}
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}
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asmsub rndw() -> uword @AY {
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%asm {{
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jmp math.randword
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}}
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}
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asmsub rndseed(uword seed1 @AY, uword seed2 @R0) clobbers(A,Y) {
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; -- set new pseudo RNG's seed values. Defaults are: $00c2, $1137
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%asm {{
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sta math.randword.x1
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sty math.randword.c1
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lda cx16.r0L
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sta math.randword.a1
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lda cx16.r0H
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sta math.randword.b1
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rts
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}}
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}
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}
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