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5a38af1fb8
freebsd-nq/lib/msun
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Edward Tomasz Napierala 5a38af1fb8 Introduce <sys/qmath.h>, a fixed-point math library from Netflix. 
This makes it possible to perform mathematical operations
on
fractional values without using floating point. It operates on Q
numbers, which are integer-sized, opaque structures initialized
to hold a chosen number of integer and fractional
bits.


For a general description of the Q number system, see the "Fixed Point
Representation & Fractional Math" whitepaper[1]; for the actual
API see the qmath(3) man page.

This is one of dependencies for the upcoming stats(3) framework[2]
that will be applied to the TCP stack in a later commit.

1. https://www.superkits.net/whitepapers/Fixed%20Point%20Representation%20&%20Fractional%20Math.pdf
2. https://reviews.freebsd.org/D20477

Reviewed by:	bcr (man pages, earlier version), sef (earlier version)
Discussed with:	cem, dteske, imp, lstewart
Sponsored By:	Klara Inc, Netflix
Obtained from:	Netflix
Differential Revision:	https://reviews.freebsd.org/D20116
2019-08-27 11:46:22 +00:00
..
aarch64
amd64 Resolve conflicts between macros in fenv.h and ieeefp.h 2018-05-31 20:22:47 +00:00
arm lib: further adoption of SPDX licensing ID tags. 2017-11-26 02:00:33 +00:00
bsdsrc Remove an unused incude from lib/msun/bsdsrc/b_log.c. 2017-12-07 20:41:23 +00:00
i387 Resolve conflicts between macros in fenv.h and ieeefp.h 2018-05-31 20:22:47 +00:00
ld80 Recommit r336497: Fix powl, cpow, cpowf, and cpowl imports from OpenBSD 2018-07-20 18:27:30 +00:00
ld128 msun: Fix some old typos. 2018-12-31 15:43:06 +00:00
man Introduce <sys/qmath.h>, a fixed-point math library from Netflix. 2019-08-27 11:46:22 +00:00
mips lib: further adoption of SPDX licensing ID tags. 2017-11-26 02:00:33 +00:00
powerpc lib: further adoption of SPDX licensing ID tags. 2017-11-26 02:00:33 +00:00
riscv Replace SOFTFLOAT with __riscv_float_abi_*. 2018-04-19 20:36:15 +00:00
sparc64 lib: further adoption of SPDX licensing ID tags. 2017-11-26 02:00:33 +00:00
src Replace calls to sin(x) and cos(x) with a single call to sincos(). 2019-02-10 08:46:07 +00:00
tests Partially revert r271349, which disabled the msun cexp test #4 on i386. 2019-06-01 20:08:10 +00:00
x86 Resolve conflicts between macros in fenv.h and ieeefp.h 2018-05-31 20:22:47 +00:00
Makefile libm: squelch -Woverflow from gcc6 2019-02-01 23:15:54 +00:00
Makefile.depend DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
Symbol.map msun: add ld80/ld128 powl, cpow, cpowf, cpowl from openbsd 2018-07-15 00:23:10 +00:00