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Author	SHA1	Message	Date
Michael Sevakis	b2a373eb64	Replace fp_sqrt function with one that only uses shift, or and sub. Simply extends the current isqrt() to be able to do fractional bits and improves the initial estimate using clz(). iqrt() itself is no more and is equivalent to fp_sqrt(x, 0). The original also had a small bug where the guess comparision should have been >=, not >. Uses no large integer math or division and is very accurate (simply returns a truncated fraction). Change-Id: I2ae26e6505df1770dc01e56220f7385369f90ae9	2017-10-01 20:29:38 -04:00
Michael Sevakis	95e23defb0	Make fixepoint.c as a shared library (libfixedpoint.a). Change-Id: Icc10d6e85f890c432f191233a4d64e09f00be43d Reviewed-on: http://gerrit.rockbox.org/456 Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Tested-by: Michael Sevakis <jethead71@rockbox.org>	2013-04-26 00:11:04 +02:00

Author

SHA1

Message

Date

Michael Sevakis

b2a373eb64

Replace fp_sqrt function with one that only uses shift, or and sub.

Simply extends the current isqrt() to be able to do fractional bits
and improves the initial estimate using clz(). iqrt() itself is
no more and is equivalent to fp_sqrt(x, 0). The original also had
a small bug where the guess comparision should have been >=, not >.

Uses no large integer math or division and is very accurate
(simply returns a truncated fraction).

Change-Id: I2ae26e6505df1770dc01e56220f7385369f90ae9

2017-10-01 20:29:38 -04:00

Michael Sevakis

95e23defb0

Make fixepoint.c as a shared library (libfixedpoint.a).

Change-Id: Icc10d6e85f890c432f191233a4d64e09f00be43d
Reviewed-on: http://gerrit.rockbox.org/456
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested-by: Michael Sevakis <jethead71@rockbox.org>

2013-04-26 00:11:04 +02:00

Renamed from firmware/include/fixedpoint.h (Browse further)

2 commits