Implement fenv for more architectures

[Martin Husemann]

Hey folks,

more and more parts of our source tree depend on fenv.h (of course mostly
in libm). Fenv(3) handles things like FPU rounding mode and exception
handling.

It is currently available for amd64, arm, i386, sparc and sparc64.

It should be pretty easy to implement for other architectures, and it would
be great to complete support across all arches, to avoid ugly ifdefs like
I just hacked into libm/src/e_sqrtl.c.

Any volunteers?

Martin

[enh]

iirc your ARM stuff isn't right. i think we had to rewrite it for
bionic. we have a MIPS fenv too. ARM just contributed aarch64, but i
haven't actually tested it yet.
https://android-review.googlesource.com/#/c/68492/

we have some simple tests too.

Post by Martin Husemann
Hey folks,
more and more parts of our source tree depend on fenv.h (of course mostly
in libm). Fenv(3) handles things like FPU rounding mode and exception
handling.
It is currently available for amd64, arm, i386, sparc and sparc64.
It should be pretty easy to implement for other architectures, and it would
be great to complete support across all arches, to avoid ugly ifdefs like
I just hacked into libm/src/e_sqrtl.c.
Any volunteers?
Martin

[Matt Thomas]

Post by enh
iirc your ARM stuff isn't right. i think we had to rewrite it for
bionic. we have a MIPS fenv too. ARM just contributed aarch64, but i
haven't actually tested it yet.
https://android-review.googlesource.com/#/c/68492/
we have some simple tests too.

In what way? Our definitions are the same except we use int instead __uint32_t.