src/sys/alpha/include/inst.h, branch release/3.5.0_cvs FreeBSD source tree This commit was manufactured by cvs2svn to create tag 2000-06-25T00:20:49+00:00 cvs2svn cvs2svn@FreeBSD.org 2000-06-25T00:20:49+00:00 8e878a0310eae754021dbd73ca928eaf7cf6a65c 'RELENG_3_5_0_RELEASE'. This commit was manufactured to restore the state of the 3.5-RELEASE image. Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs. 
'RELENG_3_5_0_RELEASE'.

This commit was manufactured to restore the state of the 3.5-RELEASE image.
Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs.
$Id$ -> $FreeBSD$ 1999-08-29T15:57:45+00:00 Peter Wemm peter@FreeBSD.org 1999-08-29T15:57:45+00:00 a92bee191d618605d749ddc8e410d0ae66d03752 






Implement 'software completion' for floating point arithmetic.  On the
1998-12-04T10:52:48+00:00

Doug Rabson
dfr@FreeBSD.org

1998-12-04T10:52:48+00:00

5b38fe900d505bcfed3afc428cff5710109aed29

alpha, operations involving non-finite numbers or denormalised numbers
or operations which should generate such numbers will cause an arithmetic
exception.  For programs which follow some strict code generation rules,
the kernel trap handler can then 'complete' the operation by emulating
the faulting instruction.

To use software completion, a program must be compiled with the arguments
'-mtrap-precision=i' and '-mfp-trap-mode=su' or '-mfp-trap-mode=sui'.
Programs compiled in this way can use non-finite and denormalised numbers
at the expense of slightly less efficient code generation of floating
point instructions.  Programs not compiled with these options will receive
a SIGFPE signal when non-finite or denormalised numbers are used or
generated.

Reviewed by: John Polstra <jdp@polstra.com>





alpha, operations involving non-finite numbers or denormalised numbers
or operations which should generate such numbers will cause an arithmetic
exception.  For programs which follow some strict code generation rules,
the kernel trap handler can then 'complete' the operation by emulating
the faulting instruction.

To use software completion, a program must be compiled with the arguments
'-mtrap-precision=i' and '-mfp-trap-mode=su' or '-mfp-trap-mode=sui'.
Programs compiled in this way can use non-finite and denormalised numbers
at the expense of slightly less efficient code generation of floating
point instructions.  Programs not compiled with these options will receive
a SIGFPE signal when non-finite or denormalised numbers are used or
generated.

Reviewed by: John Polstra <jdp@polstra.com>