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3 commits

Author SHA1 Message Date
Michael Sevakis
66b49dc0b2 Need limits.h for hosted builds 
Change-Id: Iac1433957de80ad5db51396f74acf1f4f8d45bf3
 2017-10-01 23:27:41 -04:00
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 apps/fixedpoint.c (Browse further)