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79 lines
1.2 KiB
NASM
79 lines
1.2 KiB
NASM
; --- floating point builtin functions
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func_sign_f_into_A .proc
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jsr MOVFM
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jmp SIGN
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.pend
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a_times_5 .proc
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sta P8ZP_SCRATCH_B1
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asl a
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asl a
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clc
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adc P8ZP_SCRATCH_B1
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rts
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.pend
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func_abs_f_into_FAC1 .proc
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jsr MOVFM
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jmp ABS
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.pend
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func_sqrt_into_FAC1 .proc
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jsr MOVFM
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jmp SQR
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.pend
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containment_floatarray .proc
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; -- check if a value exists in a float array.
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; parameters: FAC1: value to check, P8ZP_SCRATCH_W1: address of the word array, Y = length of array (>=1).
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; returns boolean 0/1 in A.
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sty P8ZP_SCRATCH_REG
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ldx #<floats.floats_temp_var
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ldy #>floats.floats_temp_var
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jsr floats.MOVMF
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ldx P8ZP_SCRATCH_REG
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ldy #0
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- lda floats.floats_temp_var
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cmp (P8ZP_SCRATCH_W1),y
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bne _firstmiss
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iny
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lda floats.floats_temp_var+1
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cmp (P8ZP_SCRATCH_W1),y
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bne _secondmiss
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iny
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lda floats.floats_temp_var+2
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cmp (P8ZP_SCRATCH_W1),y
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bne _thirdmiss
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iny
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lda floats.floats_temp_var+3
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cmp (P8ZP_SCRATCH_W1),y
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bne _fourthmiss
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iny
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lda floats.floats_temp_var+4
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cmp (P8ZP_SCRATCH_W1),y
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bne _fifthmiss
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lda #1
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rts
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_firstmiss
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iny
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_secondmiss
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iny
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_thirdmiss
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iny
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_fourthmiss
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iny
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_fifthmiss
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iny
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dex
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bne -
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lda #0
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rts
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.pend
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