0001452: rint() bad on x86. - BusyBox Bug and Patch Tracking

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Category

Severity

Reproducibility

Date Submitted

Last Update

0001452

[uClibc] Architecture Specific

minor

always

07-31-07 05:55

08-01-07 10:19

Reporter

chmeee

View Status

public

Assigned To

uClibc

Priority

normal

Resolution

open

Status

assigned

Product Version

0.9.28.1

Summary

0001452: rint() bad on x86.

Description

On x86 with Linux uclibc's rint() function returns bad results. This was tracked down to Linux's defaulting to 80-bit floating point rounding, and uclibc's 64-bit function. There are two ways of dealing with this:

1) Reset FPU to 64-bit precision.
2) Import glibc's functions for this and its variants.

I'm currently working on doing the latter in my personal tree, and will submit a patch when I finish.

Additional Information

This makes PostgreSQL's regression test fail.

Attached Files

uclibc_fp_fix.diff [^] (4,593 bytes) 08-01-07 10:18

Relationships

Notes
(0002647) chmeee 08-01-07 10:19	The attached diff fixes the rint() functions by importing the glibc code for them.

Issue History
Date Modified	Username	Field	Change
07-31-07 05:55	chmeee	New Issue
07-31-07 05:55	chmeee	Status	new => assigned
07-31-07 05:55	chmeee	Assigned To	=> uClibc
08-01-07 10:18	chmeee	File Added: uclibc_fp_fix.diff
08-01-07 10:19	chmeee	Note Added: 0002647