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reg_x removal: math.asm and some others

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This commit is contained in:
Irmen de Jong 2020-09-13 20:38:50 +02:00
parent 9938959026
commit ea8b7ab193
7 changed files with 27 additions and 18 deletions
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2
compiler/res/prog8lib/c64floats.asm
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@ -3,6 +3,8 @@
FL_ONE_const .byte 129 ; 1.0
FL_ZERO_const .byte 0,0,0,0,0 ; 0.0
floats_store_reg .byte 0 ; temp storage
ub2float .proc
; -- convert ubyte in SCRATCH_ZPB1 to float at address A/Y

4
compiler/res/prog8lib/c64flt.p8
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@ -194,7 +194,7 @@ asmsub GETADRAY () clobbers(X) -> uword @ AY {
sub print_f (float value) {
; ---- prints the floating point value (without a newline).
%asm {{
stx P8ZP_SCRATCH_REG_X
stx floats_store_reg
lda #<value
ldy #>value
jsr MOVFM ; load float into fac1
@ -207,7 +207,7 @@ sub print_f (float value) {
jsr c64.CHROUT
iny
bne -
ldx P8ZP_SCRATCH_REG_X
ldx floats_store_reg
+ rts
}}
}

8
compiler/res/prog8lib/c64lib.p8
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@ -299,8 +299,8 @@ _irq_handler_init
sta IRQ_SCRATCH_ZPB1
lda P8ZP_SCRATCH_REG
sta IRQ_SCRATCH_ZPREG
lda P8ZP_SCRATCH_REG_X
sta IRQ_SCRATCH_ZPREGX
lda P8ZP_SCRATCH_REG_X ; TODO remove REG_X
sta IRQ_SCRATCH_ZPREGX ; TODO remove this storage byte
lda P8ZP_SCRATCH_W1
sta IRQ_SCRATCH_ZPWORD1
lda P8ZP_SCRATCH_W1+1
@ -325,8 +325,8 @@ _irq_handler_end
sta P8ZP_SCRATCH_B1
lda IRQ_SCRATCH_ZPREG
sta P8ZP_SCRATCH_REG
lda IRQ_SCRATCH_ZPREGX
sta P8ZP_SCRATCH_REG_X
lda IRQ_SCRATCH_ZPREGX ; TODO remove this storage location
sta P8ZP_SCRATCH_REG_X ; TODO remove _REG_X
lda IRQ_SCRATCH_ZPWORD1
sta P8ZP_SCRATCH_W1
lda IRQ_SCRATCH_ZPWORD1+1

4
compiler/res/prog8lib/conv.p8
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@ -213,7 +213,7 @@ asmsub byte2decimal (byte value @ A) -> ubyte @ Y, ubyte @ A, ubyte @ X {
asmsub ubyte2hex (ubyte value @ A) -> ubyte @ A, ubyte @ Y {
; ---- A to hex petscii string in AY (first hex char in A, second hex char in Y)
%asm {{
stx P8ZP_SCRATCH_REG_X
stx P8ZP_SCRATCH_REG
pha
and #$0f
tax
@ -225,7 +225,7 @@ asmsub ubyte2hex (ubyte value @ A) -> ubyte @ A, ubyte @ Y {
lsr a
tax
lda _hex_digits,x
ldx P8ZP_SCRATCH_REG_X
ldx P8ZP_SCRATCH_REG
rts
_hex_digits .text "0123456789abcdef" ; can probably be reused for other stuff as well

4
compiler/res/prog8lib/cx16flt.p8
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@ -130,7 +130,7 @@ asmsub GETADRAY () clobbers(X) -> uword @ AY {
sub print_f (float value) {
; ---- prints the floating point value (without a newline).
%asm {{
stx P8ZP_SCRATCH_REG_X
phx
lda #<value
ldy #>value
jsr MOVFM ; load float into fac1
@ -143,7 +143,7 @@ sub print_f (float value) {
jsr c64.CHROUT
iny
bne -
ldx P8ZP_SCRATCH_REG_X
plx
+ rts
}}
}

20
compiler/res/prog8lib/math.asm
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@ -11,6 +11,10 @@
; http://codebase64.org/doku.php?id=base:6502_6510_maths
;
math_store_reg .byte 0 ; temporary storage
multiply_bytes .proc
; -- multiply 2 bytes A and Y, result as byte in A (signed or unsigned)
sta P8ZP_SCRATCH_B1 ; num1
@ -31,7 +35,7 @@ multiply_bytes_16 .proc
; -- multiply 2 bytes A and Y, result as word in A/Y (unsigned)
sta P8ZP_SCRATCH_B1
sty P8ZP_SCRATCH_REG
stx P8ZP_SCRATCH_REG_X
stx math_store_reg
lda #0
ldx #8
lsr P8ZP_SCRATCH_B1
@ -44,7 +48,7 @@ multiply_bytes_16 .proc
bne -
tay
lda P8ZP_SCRATCH_B1
ldx P8ZP_SCRATCH_REG_X
ldx math_store_reg
rts
.pend
@ -57,7 +61,7 @@ multiply_words .proc
sta P8ZP_SCRATCH_W2
sty P8ZP_SCRATCH_W2+1
stx P8ZP_SCRATCH_REG_X
stx P8ZP_SCRATCH_REG
mult16 lda #0
sta result+2 ; clear upper bits of product
@ -79,7 +83,7 @@ mult16 lda #0
ror result
dex
bne -
ldx P8ZP_SCRATCH_REG_X
ldx P8ZP_SCRATCH_REG
rts
result .byte 0,0,0,0
@ -124,7 +128,7 @@ divmod_ub_asm .proc
; division by zero will result in quotient = 255 and remainder = original number
sty P8ZP_SCRATCH_REG
sta P8ZP_SCRATCH_B1
stx P8ZP_SCRATCH_REG_X
stx math_store_reg
lda #0
ldx #8
@ -137,7 +141,7 @@ divmod_ub_asm .proc
dex
bne -
ldy P8ZP_SCRATCH_B1
ldx P8ZP_SCRATCH_REG_X
ldx math_store_reg
rts
.pend
@ -197,7 +201,7 @@ result = dividend ;save memory by reusing divident to store the result
sta _divisor
sty _divisor+1
stx P8ZP_SCRATCH_REG_X
stx P8ZP_SCRATCH_REG
lda #0 ;preset remainder to 0
sta remainder
sta remainder+1
@ -224,7 +228,7 @@ result = dividend ;save memory by reusing divident to store the result
lda result
ldy result+1
ldx P8ZP_SCRATCH_REG_X
ldx P8ZP_SCRATCH_REG
rts
_divisor .word 0
.pend

3
examples/cx16/mandelbrot.p8
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@ -3,6 +3,9 @@
%import cx16flt
%zeropage basicsafe
; TODO fix this, only black squares output...
main {
const uword width = 60
const uword height = 50