intmath Module Reference

This module defines integer math functions used by other programs. More...

Data Types
interface	i1log2
interface	ilog2

Functions/Subroutines
integer(kind=1) function	i1log2_1 (ival)
	This function returns log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2) for 1 bit integer numbers. More...
integer(kind=2) function	i1log2_2 (ival)
	This function returns log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2) for 2 bit integer numbers. More...
integer(kind=4) function	i1log2_4 (ival)
	This function returns log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2) for 4 bit integer numbers. More...
integer(kind=8) function	i1log2_8 (ival)
	This function returns log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2) for 8 bit integer numbers. More...
integer(kind=1) function	ilog2_1 (i_in)
	This function returns log(x)/log(2) for 1 bit integer numbers. More...
integer(kind=2) function	ilog2_2 (i_in)
	This function returns log(x)/log(2) for 2 bit integer numbers. More...
integer(kind=4) function	ilog2_4 (i_in)
	This function returns log(x)/log(2) for 4 bit integer numbers. More...
integer(kind=8) function	ilog2_8 (i_in)
	This function returns log(x)/log(2) for 8 bit integer numbers. More...

Detailed Description

This module defines integer math functions used by other programs.

It include following functions:

• ilog2 Calculate log(x)/log(2).
  • ilog2_8 for 8 bit integer numbers.
  • ilog2_4 for 4 bit integer numbers.
  • ilog2_2 for 2 bit integer numbers.
  • ilog2_1 for 1 bit integer numbers.
• i1log2 Calculate log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2).
  • i1log2_8 for 8 bit integer numbers.
  • i1log2_4 for 4 bit integer numbers.
  • i1log2_2 for 2 bit integer numbers.
  • i1log2_1 for 1 bit integer numbers.

Author

Stephen Gilbert

Date

2000-06-21

Function/Subroutine Documentation

i1log2_1()

integer(kind=1) function intmath::i1log2_1

(

integer(kind=1), value

ival

)

This function returns log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2) for 1 bit integer numbers.

Parameters

[in]

ival

1 bit integer numbers.

Returns

value for log(x+1)/log(2)

Author

Stephen Gilbert

Date

2000-06-21

Definition at line 116 of file intmath.f.

i1log2_2()

integer(kind=2) function intmath::i1log2_2

(

integer(kind=2), value

ival

)

This function returns log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2) for 2 bit integer numbers.

Parameters

[in]

ival

2 bit integer numbers.

Returns

value for log(x+1)/log(2)

Author

Stephen Gilbert

Date

2000-06-21

Definition at line 95 of file intmath.f.

i1log2_4()

integer(kind=4) function intmath::i1log2_4

(

integer(kind=4), value

ival

)

This function returns log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2) for 4 bit integer numbers.

Parameters

[in]

ival

4 bit integer numbers.

Returns

value for log(x+1)/log(2)

Author

Stephen Gilbert

Date

2000-06-21

Definition at line 74 of file intmath.f.

i1log2_8()

integer(kind=8) function intmath::i1log2_8

(

integer(kind=8), value

ival

)

This function returns log(x+1)/log(2) unless x=maxint, in which case log(x)/log(2) for 8 bit integer numbers.

Parameters

[in]

ival

8 bit integer numbers.

Returns

value for log(x+1)/log(2)

Author

Stephen Gilbert

Date

2000-06-21

Definition at line 53 of file intmath.f.

ilog2_1()

integer(kind=1) function intmath::ilog2_1

(

integer(kind=1), value

i_in

)

This function returns log(x)/log(2) for 1 bit integer numbers.

Parameters

[in]

i_in

1 bit integer numbers.

Returns

value for log(x)/log(2)

Author

Stephen Gilbert

Date

2000-06-21

Definition at line 274 of file intmath.f.

ilog2_2()

integer(kind=2) function intmath::ilog2_2

(

integer(kind=2), value

i_in

)

This function returns log(x)/log(2) for 2 bit integer numbers.

Parameters

[in]

i_in

2 bit integer numbers.

Returns

value for log(x)/log(2)

Author

Stephen Gilbert

Date

2000-06-21

Definition at line 233 of file intmath.f.

ilog2_4()

integer(kind=4) function intmath::ilog2_4

(

integer(kind=4), value

i_in

)

This function returns log(x)/log(2) for 4 bit integer numbers.

Parameters

[in]

i_in

4 bit integer numbers.

Returns

value for log(x)/log(2)

Author

Stephen Gilbert

Date

2000-06-21

Definition at line 187 of file intmath.f.

ilog2_8()

integer(kind=8) function intmath::ilog2_8

(

integer(kind=8), value

i_in

)

This function returns log(x)/log(2) for 8 bit integer numbers.

Parameters

[in]

i_in

8 bit integer numbers.

Returns

value for log(x)/log(2)

Author

Stephen Gilbert

Date

2000-06-21

Definition at line 136 of file intmath.f.