Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 3/31/2023
Public

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Document Table of Contents

double-size

Specifies the default KIND for DOUBLE PRECISION and DOUBLE COMPLEX declarations, constants, functions, and intrinsics.

Syntax

Linux:

-double-size size

macOS:

-double-size size

Windows:

/double-size:size

Arguments

size

Specifies the default KIND for DOUBLE PRECISION and DOUBLE COMPLEX declarations, constants, functions, and intrinsics. Possible values are: 64 (KIND=8) or 128 (KIND=16).

Default

64

DOUBLE PRECISION variables are defined as REAL*8 and DOUBLE COMPLEX variables are defined as COMPLEX*16.

Description

This option defines the default KIND for DOUBLE PRECISION and DOUBLE COMPLEX declarations, constants, functions, and intrinsics.

Option

Description

double-size 64

Defines DOUBLE PRECISION declarations, constants, functions, and intrinsics as REAL(KIND=8) (REAL*8) and defines DOUBLE COMPLEX declarations, functions, and intrinsics as COMPLEX(KIND=8) (COMPLEX*16).

double-size 128

Defines DOUBLE PRECISION declarations, constants, functions, and intrinsics as REAL(KIND=16) (REAL*16) and defines DOUBLE COMPLEX declarations, functions, and intrinsics as COMPLEX(KIND=16) (COMPLEX*32).

The real-size option overrides the double-size option; for example, on Linux* systems, "-double-size 64 -real-size 128" acts like "-double-size 128 -real-size 128".

IDE Equivalent

Visual Studio: Data > Default Double Precision KIND

Alternate Options

None