CVS commit: src/sys/arch/i386/include

[Michael van Elst <mlelstv%netbsd.org@localhost>]

Module Name:    src
Committed By:   mlelstv
Date:           Fri Sep 25 13:51:27 UTC 2009

Modified Files:
        src/sys/arch/i386/include: npx.h

Log Message:
The FPU Tag word is a 16bit register, in FPU (387) mode it
defines 2-bit tags for each FPU data register, in MMX mode it
defines 1-bit tags for each data register. The single bit
tags are stored in the lower 8 bits and thus in the first byte
of the save frame.

See amd64/include/fpu.h and the IA-32 Software Developer's manual Vol 2A.


To generate a diff of this commit:
cvs rdiff -u -r1.22 -r1.23 src/sys/arch/i386/include/npx.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.