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repaired min(f) max(f) fixes #13

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This commit is contained in:
Irmen de Jong 2019-04-07 23:19:31 +02:00
parent 3e7e44acfe
commit fc47d3feb8
1 changed files with 20 additions and 22 deletions
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42
compiler/res/prog8lib/c64flt.p8
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@ -893,46 +893,44 @@ _cmp_mod cpy #255 ; modified
.pend
func_max_f .proc
lda #<_min_float
ldy #>_min_float
jsr c64flt.MOVFM ; fac1=min(float)
lda #255
sta _cmp_mod+1 ; compare using 255 so we keep larger values
_minmax_entry jsr pop_array_and_lengthmin1Y
sta _minmax_cmp+1
lda #<_largest_neg_float
ldy #>_largest_neg_float
_minmax_entry jsr MOVFM
jsr prog8_lib.pop_array_and_lengthmin1Y
stx c64.SCRATCH_ZPREGX
- sty c64.SCRATCH_ZPREG
lda c64.SCRATCH_ZPWORD1
ldy c64.SCRATCH_ZPWORD1+1
jsr c64flt.FCOMP
_cmp_mod cmp #255 ; will be modified
jsr FCOMP
_minmax_cmp cmp #255 ; modified
bne +
; fac1 is smaller/larger, so store the new value instead
lda c64.SCRATCH_ZPWORD1
ldy c64.SCRATCH_ZPWORD1+1
jsr c64flt.MOVFM
ldy c64.SCRATCH_ZPREG
dey
cmp #255
beq +
lda c64.SCRATCH_ZPWORD1
jsr MOVFM
+ lda c64.SCRATCH_ZPWORD1
clc
adc #5
sta c64.SCRATCH_ZPWORD1
bcc -
bcc +
inc c64.SCRATCH_ZPWORD1+1
+ ldy c64.SCRATCH_ZPREG
dey
bne -
+ jmp push_fac1_as_result
_min_float .byte 255,255,255,255,255 ; -1.7014118345e+38
jmp push_fac1_as_result
rts
_largest_neg_float .byte 255,255,255,255,255 ; largest negative float -1.7014118345e+38
.pend
func_min_f .proc
lda #<_max_float
ldy #>_max_float
jsr c64flt.MOVFM ; fac1=max(float)
lda #1
sta func_max_f._cmp_mod+1 ; compare using 1 so we keep smaller values
sta func_max_f._minmax_cmp+1
lda #<_largest_pos_float
ldy #>_largest_pos_float
jmp func_max_f._minmax_entry
_max_float .byte 255,127,255,255,255 ; 1.7014118345e+38
_largest_pos_float .byte 255,127,255,255,255 ; largest positive float
rts
.pend
func_sum_f .proc