Add float and long double versions of functions in SysFloat.
Most of these actually just jump to the existing functions, since they really use extended precision anyway. The exception is the modf functions, which need a separate implementation for each type because they store a value through a pointer to that type.
This commit is contained in:
Stephen Heumann
parent
3ec8a8797f
commit
268892b671
271
math2.asm
271
math2.asm
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@ -13,6 +13,7 @@
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****************************************************************
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math2 private dummy segment
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copy equates.asm
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end
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****************************************************************
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@ -589,6 +590,165 @@ ret creturn 4:x return it
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rtl
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end
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****************************************************************
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*
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* float modff(float x, float *iptr);
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*
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* Splits x into integer and fractional parts. Returns the
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* fractional part and stores integer part as a float in *iptr.
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*
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****************************************************************
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*
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modff start
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using MathCommon2
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csubroutine (10:x,4:iptr),0
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phb
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phk
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plb
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lda x copy x to t1
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sta t1
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lda x+2
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sta t1+2
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lda x+4
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sta t1+4
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lda x+6
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sta t1+6
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lda x+8
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sta t1+8
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asl a check for infinity or nan
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cmp #32767|1
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bne finite
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lda x+6
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asl a
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ora x+4
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ora x+2
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ora x
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bne storeint if value is nan, return it as-is
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stz t1 if value is +-inf, fractional part is 0
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stz t1+2
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stz t1+4
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stz t1+6
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stz t1+8
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bra storeint
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finite tdc truncate x to an integer
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clc
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adc #x
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pea 0
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pha
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FTINTX
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tdc t1 := t1 - x
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clc
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adc #x
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pea 0
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pha
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ph4 #t1
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FSUBX
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storeint tdc copy x to *iptr, converting to float
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clc
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adc #x
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pea 0
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pha
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pei iptr+2
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pei iptr
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FX2S
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copysign asl t1+8 copy sign of x to t1
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asl x+8
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ror t1+8
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lda #^t1 return t1 (fractional part)
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sta iptr+2
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lda #t1
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sta iptr
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plb
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creturn 4:iptr
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end
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****************************************************************
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*
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* long double modfl(long double x, long double *iptr);
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*
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* Splits x into integer and fractional parts. Returns the
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* fractional part and stores the integer part in *iptr.
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*
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****************************************************************
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*
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modfl start
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using MathCommon2
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csubroutine (10:x,4:iptr),0
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phb
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phk
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plb
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lda x copy x to *iptr and t1
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sta [iptr]
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sta t1
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ldy #2
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lda x+2
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sta [iptr],y
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sta t1+2
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iny
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iny
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lda x+4
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sta [iptr],y
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sta t1+4
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iny
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iny
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lda x+6
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sta [iptr],y
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sta t1+6
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iny
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iny
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lda x+8
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sta [iptr],y
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sta t1+8
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asl a check for infinity or nan
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cmp #32767|1
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bne finite
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lda x+6
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asl a
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ora x+4
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ora x+2
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ora x
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bne ret if value is nan, return it as-is
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stz t1 if value is +-inf, fractional part is 0
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stz t1+2
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stz t1+4
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stz t1+6
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stz t1+8
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bra copysign
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finite pei iptr+2 if value is finite
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pei iptr
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FTINTX truncate *iptr to an integer
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pei iptr+2 t1 := t1 - *iptr
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pei iptr
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ph4 #t1
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FSUBX
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copysign asl t1+8 copy sign of x to t1
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asl x+8
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ror t1+8
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ret lda #^t1 return t1 (fractional part)
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sta iptr+2
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lda #t1
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sta iptr
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plb
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creturn 4:iptr
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end
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****************************************************************
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*
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* double remainder(double x, double y);
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@ -839,3 +999,114 @@ truncl entry
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lda #t1
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rtl
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end
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****************************************************************
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*
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* float and long double versions of functions in SysFloat
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*
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****************************************************************
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*
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acosf start
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acosl entry
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jml acos
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end
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asinf start
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asinl entry
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jml asin
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end
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atanf start
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atanl entry
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jml atan
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end
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atan2f start
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atan2l entry
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jml atan2
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end
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ceilf start
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ceill entry
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jml ceil
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end
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cosf start
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cosl entry
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jml cos
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end
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coshf start
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coshl entry
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jml cosh
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end
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expf start
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expl entry
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jml exp
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end
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fabsf start
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fabsl entry
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jml fabs
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end
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floorf start
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floorl entry
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jml floor
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end
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fmodf start
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fmodl entry
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jml fmod
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end
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frexpf start
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frexpl entry
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jml frexp
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end
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ldexpf start
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ldexpl entry
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jml ldexp
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end
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logf start
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logl entry
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jml log
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end
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log10f start
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log10l entry
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jml log10
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end
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powf start
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powl entry
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jml pow
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end
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sinf start
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sinl entry
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jml sin
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end
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sinhf start
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sinhl entry
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jml sinh
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end
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sqrtf start
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sqrtl entry
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jml sqrt
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end
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tanf start
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tanl entry
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jml tan
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end
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tanhf start
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tanhl entry
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jml tanh
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end
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@ -245,3 +245,9 @@
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LDX #$090A
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JSL $E10000
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MEND
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MACRO
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&LAB FSUBX
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&LAB PEA $0002
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LDX #$090A
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JSL $E10000
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MEND
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25
stdlib.asm
25
stdlib.asm
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@ -918,6 +918,31 @@ srand start
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brl ~RANX2
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end
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****************************************************************
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*
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* strtof - convert a string to a float
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* strtold - convert a string to a long double
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*
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* Inputs:
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* str - pointer to the string
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* ptr - pointer to a pointer; a pointer to the first
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* char past the number is placed here. If ptr is
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* nil, no pointer is returned
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*
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* Outputs:
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* X-A - pointer to result
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*
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* Note: These are currently implemented by just calling strtod
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* (in SysFloat). As such, all of these function really
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* return values in the SANE extended format.
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*
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****************************************************************
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*
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strtold start
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strtof entry
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jml strtod
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end
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****************************************************************
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*
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* strtol - convert a string to a long
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