prog8/testsource/floats.ill

; floating point tests

output prg, basic

import "c64lib"

~ main_testing {
start
        var     .float          myfloat1        = 1234.56789
        var     .float          myfloat2        = 9876.54321
        var     .float          myfloatneg1     = -555.666
        var     .float          myfloat_large1  = 987654.1111
        var     .float          myfloat_large2  = -123456.2222
        var     .text           myfloatstr   = "1234.998877"
        var     .float          myfloatzero     = 0
        var     .float          myfloatsmall1     = 1.234
        var     .float          myfloatsmall2     = 2.6677

        return
}


~ main {

        var .float flt_pi		 = 3.141592653589793
        var .float flt_minus32768	 = -32768
        var .float flt_1		 = 1
        var .float flt_half_sqr2	 = 0.7071067811865476
        var .float flt_sqr2		 = 1.4142135623730951
        var .float flt_minus_half  	 = -.5
        var .float flt_log_2		 = 0.6931471805599453
        var .float flt_10		 = 10
        var .float flt_1e9		 = 1000000000
        var .float flt_half        	 = .5
        var .float flt_one_over_log_2	 = 1.4426950408889634
        var .float flt_half_pi		 = 1.5707963267948966
        var .float flt_double_pi	 = 6.283185307179586
        var .float flt_point25		 = .25
        var .float my_float
        memory .word  some_address       = $ccdd
        memory .byte  some_addressb      = $ccee
        var .byte  bytevar = $cc
        var .word  wordvar = $cdef


sub  printflt (float: AY) -> (?) {
        c64.MOVFM!(AY)
        goto c64.FPRINTLN
        ; c64.FOUT!()
        ; c64scr.print_string!(AY)
        ;goto c64.CHROUT('\n')
}


start
        ; assign some float values to the memory
        AY = #flt_pi
        some_address = # flt_pi
        some_address = 4123.2342342222
        [$c000.word] = # flt_pi

        my_float ++
        my_float += 1
        my_float += 0.5
        my_float += 999.222
        my_float --
        my_float -= 1
        my_float -= 0.5
        my_float -= 999.222

        ; print some floating points from source and compare them with ROM

        printflt(#flt_pi)
        printflt(#c64.FL_PIVAL)

        printflt(#flt_minus32768)
        printflt(#c64.FL_N32768)

        printflt(#flt_1)
        printflt(#c64.FL_FONE)

        printflt(#flt_half_sqr2)
        printflt( #  c64.FL_SQRHLF)

        printflt(#flt_sqr2)
        printflt(#c64.FL_SQRTWO)

        printflt(#flt_minus_half)
        printflt(#c64.FL_NEGHLF)

        printflt(#flt_log_2)
        printflt(#c64.FL_LOG2)

        printflt(#flt_10)
        printflt(#c64.FL_TENC)

        printflt(#flt_1e9)
        printflt(#c64.FL_NZMIL)

        printflt(#flt_half)
        printflt(#c64.FL_FHALF)

        printflt(#flt_one_over_log_2)
        printflt(#c64.FL_LOGEB2)

        printflt(#flt_half_pi)
        printflt(#c64.FL_PIHALF)

        printflt(#flt_double_pi)
        printflt(#c64.FL_TWOPI)

        printflt(# flt_point25)
        printflt(#c64.FL_FR4)

reg_to_float
        c64.CHROUT!('\n')

        A=33
        X=44
        Y=55

        my_float = A
        printflt(#my_float)

        my_float = X
        printflt(#my_float)

        my_float = Y
        printflt(#my_float)

        XY = 11122
        my_float = XY
        printflt(#my_float)

        AX = 33344
        my_float = AX
        printflt(#my_float)

        AY = 55566
        my_float = AY
        printflt(#my_float)

        return
}