mirror of
https://github.com/irmen/prog8.git
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236 lines
4.4 KiB
Lua
236 lines
4.4 KiB
Lua
floats {
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; the floating point functions shared across compiler targets
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%option merge
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sub print_f(float value) {
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; ---- prints the floating point value (without a newline).
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%asm {{
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stx floats_store_reg
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lda #<value
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ldy #>value
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jsr MOVFM ; load float into fac1
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jsr FOUT ; fac1 to string in A/Y
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sta P8ZP_SCRATCH_W1
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sty P8ZP_SCRATCH_W1+1
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ldy #0
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- lda (P8ZP_SCRATCH_W1),y
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beq +
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jsr c64.CHROUT
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iny
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bne -
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+ ldx floats_store_reg
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rts
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}}
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}
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sub pow(float value, float power) -> float {
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%asm {{
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stx P8ZP_SCRATCH_W1
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sty P8ZP_SCRATCH_W1+1
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lda #<value
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ldy #>value
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jsr floats.CONUPK
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lda #<power
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ldy #>power
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jsr floats.FPWR
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ldx P8ZP_SCRATCH_W1
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ldy P8ZP_SCRATCH_W1+1
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rts
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}}
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}
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sub fabs(float value) -> float {
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%asm {{
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stx P8ZP_SCRATCH_REG
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lda #<value
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ldy #>value
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jsr MOVFM
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jsr ABS
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub sin(float angle) -> float {
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%asm {{
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lda #<angle
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ldy #>angle
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr SIN
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub cos(float angle) -> float {
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%asm {{
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lda #<angle
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ldy #>angle
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr COS
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub tan(float value) -> float {
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%asm {{
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lda #<value
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ldy #>value
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr TAN
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub atan(float value) -> float {
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%asm {{
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lda #<value
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ldy #>value
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr ATN
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub ln(float value) -> float {
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%asm {{
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lda #<value
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ldy #>value
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr LOG
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub log2(float value) -> float {
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%asm {{
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lda #<value
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ldy #>value
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr LOG
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jsr MOVEF
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lda #<FL_LOG2_const
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ldy #>FL_LOG2_const
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jsr MOVFM
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jsr FDIVT
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub sqrt(float value) -> float {
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%asm {{
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lda #<value
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ldy #>value
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr SQR
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub rad(float angle) -> float {
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; -- convert degrees to radians (d * pi / 180)
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%asm {{
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lda #<angle
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ldy #>angle
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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lda #<_pi_div_180
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ldy #>_pi_div_180
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jsr FMULT
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ldx P8ZP_SCRATCH_REG
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rts
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_pi_div_180 .byte 123, 14, 250, 53, 18 ; pi / 180
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}}
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}
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sub deg(float angle) -> float {
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; -- convert radians to degrees (d * (1/ pi * 180))
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%asm {{
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lda #<angle
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ldy #>angle
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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lda #<_one_over_pi_div_180
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ldy #>_one_over_pi_div_180
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jsr FMULT
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ldx P8ZP_SCRATCH_REG
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rts
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_one_over_pi_div_180 .byte 134, 101, 46, 224, 211 ; 1 / (pi * 180)
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}}
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}
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sub round(float value) -> float {
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%asm {{
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lda #<value
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ldy #>value
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr FADDH
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jsr INT
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub floor(float value) -> float {
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%asm {{
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lda #<value
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ldy #>value
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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jsr INT
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub ceil(float value) -> float {
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; -- ceil: tr = int(f); if tr==f -> return else return tr+1
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%asm {{
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lda #<value
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ldy #>value
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jsr MOVFM
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stx P8ZP_SCRATCH_REG
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ldx #<fmath_float1
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ldy #>fmath_float1
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jsr MOVMF
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jsr INT
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lda #<fmath_float1
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ldy #>fmath_float1
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jsr FCOMP
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cmp #0
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beq +
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lda #<FL_ONE_const
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ldy #>FL_ONE_const
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jsr FADD
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+ ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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sub rndf() -> float {
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%asm {{
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stx P8ZP_SCRATCH_REG
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lda #1
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jsr FREADSA
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jsr RND ; rng into fac1
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ldx P8ZP_SCRATCH_REG
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rts
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}}
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}
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}
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