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163 lines
2.7 KiB
NASM
163 lines
2.7 KiB
NASM
; --- floating point builtin functions
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func_sign_f_stack .proc
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jsr func_sign_f_into_A
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sta P8ESTACK_LO,x
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dex
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rts
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.pend
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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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func_swap_f .proc
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; -- swap floats pointed to by SCRATCH_ZPWORD1, SCRATCH_ZPWORD2
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ldy #4
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- lda (P8ZP_SCRATCH_W1),y
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pha
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lda (P8ZP_SCRATCH_W2),y
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sta (P8ZP_SCRATCH_W1),y
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pla
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sta (P8ZP_SCRATCH_W2),y
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dey
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bpl -
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rts
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.pend
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func_reverse_f .proc
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; --- reverse an array of floats (array in P8ZP_SCRATCH_W1, num elements in A)
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_left_index = P8ZP_SCRATCH_W2
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_right_index = P8ZP_SCRATCH_W2+1
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_loop_count = P8ZP_SCRATCH_REG
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pha
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jsr a_times_5
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sec
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sbc #5
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sta _right_index
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lda #0
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sta _left_index
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pla
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lsr a
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sta _loop_count
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_loop ; push the left indexed float on the stack
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ldy _left_index
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lda (P8ZP_SCRATCH_W1),y
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pha
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iny
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lda (P8ZP_SCRATCH_W1),y
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pha
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iny
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lda (P8ZP_SCRATCH_W1),y
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pha
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iny
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lda (P8ZP_SCRATCH_W1),y
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pha
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iny
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lda (P8ZP_SCRATCH_W1),y
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pha
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; copy right index float to left index float
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ldy _right_index
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lda (P8ZP_SCRATCH_W1),y
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ldy _left_index
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sta (P8ZP_SCRATCH_W1),y
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inc _left_index
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inc _right_index
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ldy _right_index
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lda (P8ZP_SCRATCH_W1),y
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ldy _left_index
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sta (P8ZP_SCRATCH_W1),y
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inc _left_index
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inc _right_index
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ldy _right_index
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lda (P8ZP_SCRATCH_W1),y
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ldy _left_index
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sta (P8ZP_SCRATCH_W1),y
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inc _left_index
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inc _right_index
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ldy _right_index
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lda (P8ZP_SCRATCH_W1),y
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ldy _left_index
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sta (P8ZP_SCRATCH_W1),y
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inc _left_index
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inc _right_index
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ldy _right_index
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lda (P8ZP_SCRATCH_W1),y
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ldy _left_index
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sta (P8ZP_SCRATCH_W1),y
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; pop the float off the stack into the right index float
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ldy _right_index
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pla
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sta (P8ZP_SCRATCH_W1),y
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dey
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pla
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sta (P8ZP_SCRATCH_W1),y
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dey
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pla
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sta (P8ZP_SCRATCH_W1),y
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dey
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pla
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sta (P8ZP_SCRATCH_W1),y
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dey
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pla
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sta (P8ZP_SCRATCH_W1),y
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inc _left_index
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lda _right_index
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sec
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sbc #9
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sta _right_index
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dec _loop_count
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bne _loop
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rts
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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_any_f_into_A .proc
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jsr a_times_5
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jmp prog8_lib.func_any_b_into_A
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.pend
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func_all_f_into_A .proc
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jsr a_times_5
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jmp prog8_lib.func_all_b_into_A
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.pend
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func_any_f_stack .proc
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jsr a_times_5
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jmp prog8_lib.func_any_b_stack
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.pend
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func_all_f_stack .proc
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jsr a_times_5
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jmp prog8_lib.func_all_b_stack
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.pend
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func_abs_f_into_FAC1 .proc
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stx P8ZP_SCRATCH_REG
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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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.pend
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func_sqrt_into_FAC1 .proc
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stx P8ZP_SCRATCH_REG
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jsr MOVFM
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jsr SQR
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ldx P8ZP_SCRATCH_REG
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rts
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.pend
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