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[PowerPC] [PowerPCSPE] Fix multiple issues in fpsetmask(). 2021-03-08T18:39:33+00:00 Brandon Bergren bdragon@FreeBSD.org 2021-03-01T03:06:59+00:00 8b96d6ac04e7e761ec6b9eff47c801a2b89fbd6d Building R on powerpc64 exposed a problem in fpsetmask() whereby we were not properly clamping the provided mask to the valid range. This same issue affects powerpc and powerpcspe. Properly limit the range of bits that can be set via fpsetmask(). While here, use the correct fp_except_t type instead of fp_rnd_t. Reported by: pkubaj, jhibbits (in IRC) Sponsored by: Tag1 Consulting, Inc. (cherry picked from commit 384ee7cc6e9e4ddc91a6e9e623fcbbe5826bce38) 
Building R on powerpc64 exposed a problem in fpsetmask() whereby we
were not properly clamping the provided mask to the valid range.

This same issue affects powerpc and powerpcspe.

Properly limit the range of bits that can be set via fpsetmask().

While here, use the correct fp_except_t type instead of fp_rnd_t.

Reported by:	pkubaj, jhibbits (in IRC)
Sponsored by:	Tag1 Consulting, Inc.

(cherry picked from commit 384ee7cc6e9e4ddc91a6e9e623fcbbe5826bce38)
[PowerPC] Implement VDSO timebase access on powerpc* 2020-09-08T03:00:31+00:00 Brandon Bergren bdragon@FreeBSD.org 2020-09-08T03:00:31+00:00 328b5f2570452d1b4bc0d00d052d693977ea60ea Implement the remaining pieces needed to allow userland timestamp reading. Rewritten based on an intial essay into the problem by Justin Hibbits. (Copyright changed to my own on his request.) Tested on ppc64 (POWER9 Talos II), powerpcspe (e500v2 RB800), and powerpc (g4 PowerBook). Reviewed by: jhibbits (in irc) Sponsored by: Tag1 Consulting, Inc. Differential Revision: https://reviews.freebsd.org/D26347 
Implement the remaining pieces needed to allow userland timestamp reading.

Rewritten based on an intial essay into the problem by Justin Hibbits.
(Copyright changed to my own on his request.)

Tested on ppc64 (POWER9 Talos II), powerpcspe (e500v2 RB800), and
powerpc (g4 PowerBook).

Reviewed by:	jhibbits (in irc)
Sponsored by:	Tag1 Consulting, Inc.
Differential Revision:	https://reviews.freebsd.org/D26347
[PowerPC] Fix SPE floating point environment manipulation 2019-12-12T17:12:18+00:00 Brandon Bergren bdragon@FreeBSD.org 2019-12-12T17:12:18+00:00 4f9ed3156c3aff08629d37c8a89ed5ba525b01c9 Fix multiple problems in the powerpcspe floating point code. * Endianness handling of the SPEFSCR in fenv.h was completely broken. * Ensure SPEFSCR synchronization requirements are being met. The __r.__d -> __r transformations were written by jhibbits. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D22526 
Fix multiple problems in the powerpcspe floating point code.

* Endianness handling of the SPEFSCR in fenv.h was completely broken.
* Ensure SPEFSCR synchronization requirements are being met.

The __r.__d -> __r transformations were written by jhibbits.

Reviewed by:	jhibbits
Differential Revision:	https://reviews.freebsd.org/D22526
Fix fabs(3) for powerpcspe, this time for real 2018-07-26T14:42:20+00:00 Justin Hibbits jhibbits@FreeBSD.org 2018-07-26T14:42:20+00:00 28c20ad06c3f0328eb0d86b03da40b8ea970baee SPE ABI uses the soft-float ABI, which splits doubles into two words. As such, fabs(3) cannot work on a double directly. It's too costly to convert the argument pair into a single double to use efdabs, so clear the top bit of the high word, which is the sign bit. 
SPE ABI uses the soft-float ABI, which splits doubles into two words.  As such,
fabs(3) cannot work on a double directly.  It's too costly to convert the
argument pair into a single double to use efdabs, so clear the top bit of the
high word, which is the sign bit.
Fix register usage in fabs(3) for powerpcspe 2018-07-24T22:05:55+00:00 Justin Hibbits jhibbits@FreeBSD.org 2018-07-24T22:05:55+00:00 544db45f843804966bc673011c6637d0e142d6d4 This still used the FPU register definition, which gcc converted to using %r1 (stack register). Fix to use %r3. 
This still used the FPU register definition, which gcc converted to using %r1
(stack register).  Fix to use %r3.
Fix floating point exception definitions for powerpcspe 2018-07-24T22:04:56+00:00 Justin Hibbits jhibbits@FreeBSD.org 2018-07-24T22:04:56+00:00 adc9dcf3e39318e7e04676df0f6a07b5dcca7aa0 These were incorrectly implemented in the original port. 
These were incorrectly implemented in the original port.