Use more efficient code to return values from various math functions.
This commit is contained in:
Stephen Heumann
parent
68fc475721
commit
de978dab48
24
fenv.asm
24
fenv.asm
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@ -47,8 +47,7 @@ feclearexcept start
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sta 1,S
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FSETENV clear them
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stz excepts
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creturn 2:excepts
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creturn 2:#0
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end
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****************************************************************
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@ -76,8 +75,7 @@ fegetexceptflag start
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and #FE_ALL_EXCEPT
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sta [flagp] store them in *flagp
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stz excepts
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creturn 2:excepts
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creturn 2:#0
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end
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****************************************************************
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@ -104,8 +102,7 @@ feraiseexcept start
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pha
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FSETXCP raise exceptions
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done stz excepts
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creturn 2:excepts
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done creturn 2:#0
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end
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****************************************************************
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@ -144,8 +141,7 @@ fesetexceptflag start
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sta 1,S
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FSETENV
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stz excepts
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creturn 2:excepts
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creturn 2:#0
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end
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****************************************************************
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@ -250,8 +246,7 @@ fegetenv start
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txa
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sta [envp] store it in *envp
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stz envp
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creturn 2:envp
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creturn 2:#0
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end
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****************************************************************
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@ -280,8 +275,7 @@ feholdexcept start
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pha
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FSETENV set the new environment
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stz envp
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creturn 2:envp
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creturn 2:#0
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end
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****************************************************************
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@ -306,8 +300,7 @@ fesetenv start
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pha
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FSETENV
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stz envp
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creturn 2:envp
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creturn 2:#0
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end
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****************************************************************
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@ -332,8 +325,7 @@ feupdateenv start
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pha
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FPROCEXIT
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stz envp
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creturn 2:envp
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creturn 2:#0
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end
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****************************************************************
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74
math2.asm
74
math2.asm
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@ -317,11 +317,7 @@ acoshl entry
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ret FPROCEXIT restore env & raise any new exceptions
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plb
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lda #t1 return t1
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sta x
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lda #^t1
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sta x+2
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creturn 4:x
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creturn 10:t1 return t1
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y ds 10 temporary variable
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one dc i'1' constants
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@ -442,11 +438,7 @@ setsign asl z+8 sign of z = original sign of x
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FPROCEXIT restore env & raise any new exceptions
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plb
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lda #z return z
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sta x
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lda #^z
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sta x+2
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creturn 4:x
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creturn 10:z return z
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y ds 10 temporary variables
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z ds 10
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@ -546,11 +538,7 @@ setsign asl t1+8 sign of t1 = original sign of x
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FPROCEXIT restore env & raise any new exceptions
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plb
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lda #t1 return t1
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sta x
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lda #^t1
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sta x+2
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creturn 4:x
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creturn 10:t1 return t1
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one dc i'1' constants
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minustwo dc i'-2'
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@ -646,11 +634,7 @@ do_calc sta t1+8
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ror t1+8
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plb
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lda #t1 return t1
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sta x
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lda #^t1
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sta x+2
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creturn 4:x
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creturn 10:t1 return t1
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onethird dc e'0.33333333333333333333'
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end
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@ -1865,12 +1849,8 @@ naninf anop (we skip to here if x or y is nan/inf)
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FSCALBX
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done FPROCEXIT restore env
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lda #^t1 return t1
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sta x+2
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lda #t1
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sta x
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plb
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creturn 4:x
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creturn 10:t1 return t1
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end
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****************************************************************
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@ -2474,12 +2454,8 @@ 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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creturn 10:t1 return t1 (fractional part)
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end
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****************************************************************
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@ -2552,12 +2528,8 @@ 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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ret plb
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creturn 10:t1 return t1 (fractional part)
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end
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****************************************************************
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@ -2615,13 +2587,9 @@ codeok ora #$4000 set high bit of f for quiet NaN
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stz t1+4 set rest of fraction field to 0
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stz t1+2
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stz t1
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lda #^t1 return a pointer to the result
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sta tagp+2
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lda #t1
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sta tagp
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plb
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creturn 4:tagp
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creturn 10:t1 return a pointer to the result
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end
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****************************************************************
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@ -3389,12 +3357,7 @@ roundl entry
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ret FPROCEXIT restore env & raise any new exceptions
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plb
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lda #^t1 return a pointer to the result
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sta x+2
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lda #t1
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sta x
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creturn 4:x
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creturn 10:t1 return a pointer to the result
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onehalf dc f'0.5'
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end
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@ -3466,12 +3429,8 @@ do_scalb ph4 #t1 scale the number
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bne done stop: more scaling would not change it
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brl loop else scale by remaining amount
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done lda #^t1 return a pointer to the result
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sta n+2
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lda #t1
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sta n
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plb
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creturn 4:n
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done plb
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creturn 10:t1 return a pointer to the result
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end
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****************************************************************
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@ -3740,12 +3699,7 @@ lb2 ph4 #z z := pi / (fracpart * z)
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done FPROCEXIT restore env & raise any new exceptions
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plb
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lda #^z return a pointer to the result
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sta x+2
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lda #z
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sta x
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creturn 4:x
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creturn 10:z return a pointer to the result
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cutoff dc f'10.375' cutoff for Stirling approximation (+1)
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