prog8/compiler/res/prog8lib/c64/floats_funcs.asm

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; --- floating point builtin functions
func_sign_f_stack .proc
jsr func_sign_f_into_A
sta P8ESTACK_LO,x
dex
rts
.pend
func_sign_f_into_A .proc
jsr MOVFM
jmp SIGN
.pend
func_swap_f .proc
; -- swap floats pointed to by SCRATCH_ZPWORD1, SCRATCH_ZPWORD2
ldy #4
- lda (P8ZP_SCRATCH_W1),y
pha
lda (P8ZP_SCRATCH_W2),y
sta (P8ZP_SCRATCH_W1),y
pla
sta (P8ZP_SCRATCH_W2),y
dey
bpl -
rts
.pend
func_reverse_f .proc
; --- reverse an array of floats (array in P8ZP_SCRATCH_W1, num elements in A)
_left_index = P8ZP_SCRATCH_W2
_right_index = P8ZP_SCRATCH_W2+1
_loop_count = P8ZP_SCRATCH_REG
pha
jsr a_times_5
sec
sbc #5
sta _right_index
lda #0
sta _left_index
pla
lsr a
sta _loop_count
_loop ; push the left indexed float on the stack
ldy _left_index
lda (P8ZP_SCRATCH_W1),y
pha
iny
lda (P8ZP_SCRATCH_W1),y
pha
iny
lda (P8ZP_SCRATCH_W1),y
pha
iny
lda (P8ZP_SCRATCH_W1),y
pha
iny
lda (P8ZP_SCRATCH_W1),y
pha
; copy right index float to left index float
ldy _right_index
lda (P8ZP_SCRATCH_W1),y
ldy _left_index
sta (P8ZP_SCRATCH_W1),y
inc _left_index
inc _right_index
ldy _right_index
lda (P8ZP_SCRATCH_W1),y
ldy _left_index
sta (P8ZP_SCRATCH_W1),y
inc _left_index
inc _right_index
ldy _right_index
lda (P8ZP_SCRATCH_W1),y
ldy _left_index
sta (P8ZP_SCRATCH_W1),y
inc _left_index
inc _right_index
ldy _right_index
lda (P8ZP_SCRATCH_W1),y
ldy _left_index
sta (P8ZP_SCRATCH_W1),y
inc _left_index
inc _right_index
ldy _right_index
lda (P8ZP_SCRATCH_W1),y
ldy _left_index
sta (P8ZP_SCRATCH_W1),y
; pop the float off the stack into the right index float
ldy _right_index
pla
sta (P8ZP_SCRATCH_W1),y
dey
pla
sta (P8ZP_SCRATCH_W1),y
dey
pla
sta (P8ZP_SCRATCH_W1),y
dey
pla
sta (P8ZP_SCRATCH_W1),y
dey
pla
sta (P8ZP_SCRATCH_W1),y
inc _left_index
lda _right_index
sec
sbc #9
sta _right_index
dec _loop_count
bne _loop
rts
.pend
a_times_5 .proc
sta P8ZP_SCRATCH_B1
asl a
asl a
clc
adc P8ZP_SCRATCH_B1
rts
.pend
func_any_f_into_A .proc
jsr a_times_5
jmp prog8_lib.func_any_b_into_A
.pend
func_all_f_into_A .proc
jsr a_times_5
jmp prog8_lib.func_all_b_into_A
.pend
func_any_f_stack .proc
jsr a_times_5
jmp prog8_lib.func_any_b_stack
.pend
func_all_f_stack .proc
jsr a_times_5
jmp prog8_lib.func_all_b_stack
.pend