mathieeedoubbas.library Reference¶

Comprehensive function reference for mathieeedoubbas.library, synthesised from the AmigaOS NDK 3.2 Release 4 (Autodocs/AG/mathieeedoubbas).

This page documents 12 functions of mathieeedoubbas.library. Each function entry follows the canonical autodoc format. struct Name, union Name, enum Name are clickable links to the type definition in the types reference.

Function index¶

• IEEEDPAbs()
• IEEEDPAdd()
• IEEEDPCeil()
• IEEEDPCmp()
• IEEEDPDiv()
• IEEEDPFix()
• IEEEDPFloor()
• IEEEDPFlt()
• IEEEDPMul()
• IEEEDPNeg()
• IEEEDPSub()
• IEEEDPTst()

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IEEEDPAbs()¶

IEEEDPAbs -- compute absolute value of IEEE double precision argument

Synopsis

x = IEEEDPAbs( y ); d0/d1 d0/d1

double x,y;

Function

Take the absolute value of argument y and return it to caller.

Inputs

y -- IEEE double precision floating point value

Results

x -- IEEE double precision floating point value

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IEEEDPAdd()¶

IEEEDPAdd -- add one double precision IEEE number to another

Synopsis

x = IEEEDPAdd( y , z ); d0/d1 d0/d1 d2/d3

double x,y,z;

Function

Compute x = y + z in IEEE double precision.

Inputs

y -- IEEE double precision floating point value z -- IEEE double precision floating point value

Results

x -- IEEE double precision floating point value

See also

IEEEDPSub()

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IEEEDPCeil()¶

IEEEDPCeil -- compute Ceil function of IEEE double precision number

Synopsis

x = IEEEDPCeil( y ); d0/d1 d0/d1

double x,y;

Function

Calculate the least integer greater than or equal to x and return it. This value may have more than 32 bits of significance. This identity is true. Ceil(x) = -Floor(-x).

Inputs

y -- IEEE double precision floating point value

Results

x -- IEEE double precision floating point value

See also

IEEEDPFloor()

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IEEEDPCmp()¶

IEEEDPCmp -- compare two double precision floating point numbers

Synopsis

c = IEEEDPCmp( y , z ); d0 d0/d1 d2/d3

double y,z; long c;

Function

Compare y with z. Set the condition codes for less, greater, or equal. Set return value c to -1 if yz, or 0 if y == z.

Inputs

y -- IEEE double precision floating point value z -- IEEE double precision floating point value

Results

c = 1 cc = gt for (y > z) c = 0 cc = eq for (y == z) c = -1 cc = lt for (y < z)

Bugs

did not compare correctly if negative and the MSB of the mantissae were equal. fixed.

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IEEEDPDiv()¶

IEEEDPDiv -- divide one double precision IEEE by another

Synopsis

x = IEEEDPDiv( y , z ); d0/d1 d0/d1 d2/d3

double x,y,z;

Function

Compute x = y / z in IEEE double precision.

Inputs

y -- IEEE double precision floating point value z -- IEEE double precision floating point value

Results

x -- IEEE double precision floating point value

See also

IEEEDPMul()

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IEEEDPFix()¶

IEEEDPFix -- convert IEEE double float to integer

Synopsis

x = IEEEDPFix( y ); d0 d0/d1

long x; double y;

Function

Convert IEEE double precision argument to a 32 bit signed integer and return result.

Inputs

y -- IEEE double precision floating point value

Results

if no overflow occured then return x -- 32 bit signed integer if overflow return largest +- integer For round to zero

See also

IEEEDPFlt()

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IEEEDPFloor()¶

IEEEDPFloor -- compute Floor function of IEEE double precision number

Synopsis

x = IEEEDPFloor( y ); d0/d1 d0/d1

double x,y;

Function

Calculate the largest integer less than or equal to x and return it. This value may have more than 32 bits of significance.

Inputs

y -- IEEE double precision floating point value

Results

x -- IEEE double precision floating point value

See also

IEEEDPCeil()

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IEEEDPFlt()¶

IEEEDPFlt -- convert integer to IEEE double precision number

Synopsis

x = IEEEDPFlt( y ); d0/d1 d0

double x; long y;

Function

Convert a signed 32 bit value to a double precision IEEE value and return it in d0/d1. No exceptions can occur with this function.

Inputs

y -- 32 bit integer in d0

Results

x is a 64 bit double precision IEEE value

See also

IEEEDPFix()

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IEEEDPMul()¶

IEEEDPMul -- multiply one double precision IEEE number by another

Synopsis

x = IEEEDPMul( y , z ); d0/d1 d0/d1 d2/d3

double x,y,z;

Function

Compute x = y * z in IEEE double precision.

Inputs

y -- IEEE double precision floating point value z -- IEEE double precision floating point value

Results

x -- IEEE double precision floating point value

See also

IEEEDPDiv()

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IEEEDPNeg()¶

IEEEDPNeg -- compute negative value of IEEE double precision number

Synopsis

x = IEEEDPNeg( y ); d0/d1 d0/d1

double x,y;

Function

Invert the sign of argument y and return it to caller.

Inputs

y - IEEE double precision floating point value

Results

x - IEEE double precision floating point value

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IEEEDPSub()¶

IEEEDPSub -- subtract one double precision IEEE number from another

Synopsis

x = IEEEDPSub( y , z ); d0/d1 d0/d1 d2/d3

double x,y,z;

Function

Compute x = y - z in IEEE double precision.

Inputs

y -- IEEE double precision floating point value z -- IEEE double precision floating point value

Results

x -- IEEE double precision floating point value

See also

IEEEDPAdd()

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IEEEDPTst()¶

IEEEDPTst -- compare IEEE double precision value to 0.0

Synopsis

c = IEEEDPTst( y ); d0 d0/d1

double y; long c;

Function

Compare y to 0.0, set the condition codes for less than, greater than, or equal to 0.0. Set the return value c to -1 if less than, to +1 if greater than, or 0 if equal to 0.0.

Inputs

y -- IEEE double precision floating point value

Results

c = 1 cc = gt for (y > 0.0) c = 0 cc = eq for (y == 0.0) c = -1 cc = lt for (y < 0.0)

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