fpt Reference: CORRECT PRECISION OF NUMBERS

fpt and WinFPT Reference Manual - Command-line Commands

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CORRECT PRECISION OF REAL NUMBERS

Syntax:

[DO NOT] CORRECT PRECISION OF REAL [LITERAL] NUMBERS

Function:

fpt examines the context in which every literal real number is used. If the number is assigned to a variable of higher precision, or the number is used in an arithmetic expression with objects of higher precision, the precision of the number is changed to match the context.

fpt reports the number of literal real numbers in the code, the proprtion with kind tags, the proportion promoted to a higher precision and the proportion promoted where the value of the number is changed by the promotion.

The effects of changing precision may be investigated by the command INSERT MONITOR OF CHANGED REAL NUMBERS.

Where to Use this Command

Operating system command line	Yes
Configuration file, config.fsp	Yes
Specification (fsp) files, *.fsp	Yes
Interactively, to FPT> prompt	Yes
Interactive command files	Yes
Embedded in the Fortran code	No

Default

Examples

fpt is run interactively. The value of pi is written without a kind tag or exponent character in the original code and is promoted.

FPT> correct precision of real numbers ------------------------------------------------------------------------------ NOTE Number 3743 Severity 0 (Worst 1) Count 3 Line 2 File: e:\winfpt\fpt\fpttest\t.f90 1 PI=3.14159265358D0 ^ Real literal precision increased with a small change in value ------------------------------------------------------------------------------ Promotion of Literal REAL Numbers ================================= Count Percent REAL literal numbers: 2 With KIND tags: 0 0.00% Promoted to higher precision: 2 100.00% Promoted with change in value: 1 50.00% Not promoted: 0 0.00% FPT>