---
name: "labad"
section: "3"
platform: "linux"
package: "lapack-doc"
version: "3.12.1-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/labad"
---

# labad(3)

labad: over/underflow on obsolete pre-IEEE machines

## NAME

labad - labad: over/underflow on obsolete pre-IEEE machines

## SYNOPSIS

### Functions

subroutine **dlabad** (small, large)\
 **DLABAD**  subroutine **slabad** (small, large)\
 **SLABAD**

## Detailed Description

## Function Documentation

### subroutine dlabad (double precision small, double precision large)

**DLABAD**

**Purpose:**

```
!>
!> DLABAD is a no-op and kept for compatibility reasons. It used
!> to correct the overflow/underflow behavior of machines that
!> are not IEEE-754 compliant.
!>
!>
```

**Parameters**

*SMALL*

```
!>          SMALL is DOUBLE PRECISION
!>          On entry, the underflow threshold as computed by DLAMCH.
!>          On exit, the unchanged value SMALL.
!>
```

*LARGE*

```
!>          LARGE is DOUBLE PRECISION
!>          On entry, the overflow threshold as computed by DLAMCH.
!>          On exit, the unchanged value LARGE.
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **67** of file **dlabad.f**.

### subroutine slabad (real small, real large)

**SLABAD**

**Purpose:**

```
!>
!> SLABAD is a no-op and kept for compatibility reasons. It used
!> to correct the overflow/underflow behavior of machines that
!> are not IEEE-754 compliant.
!>
```

**Parameters**

*SMALL*

```
!>          SMALL is REAL
!>          On entry, the underflow threshold as computed by SLAMCH.
!>          On exit, the unchanged value SMALL.
!>
```

*LARGE*

```
!>          LARGE is REAL
!>          On entry, the overflow threshold as computed by SLAMCH.
!>          On exit, the unchanged value LARGE.
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **66** of file **slabad.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.