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362 Commits

Author SHA1 Message Date
Siddhesh Poyarekar
45f058844c Another tweak to the multiplication algorithm 
Reduce the formula to calculate mantissa so that we reduce the net
number of multiplications performed.
 2013-02-26 21:28:16 +05:30
Siddhesh Poyarekar
2236d3595a Don't duplicate mpone and mptwo 2013-02-26 15:15:27 +05:30
Siddhesh Poyarekar
2a983a2e0a Remove commented declarations 2013-02-25 18:11:14 +05:30
Siddhesh Poyarekar
e69804d14e Use long wherever possible in mpa.c 
Using long throughout like powerpc does is beneficial since it reduces
the need to switch to 32-bit instructions.  It gives a very minor
performance improvement.
 2013-02-25 16:43:03 +05:30
Siddhesh Poyarekar
2f22a1e8dd Format slowexp.c 2013-02-25 16:13:35 +05:30
Siddhesh Poyarekar
8930ddc705 Reformat slowpow.c 2013-02-25 16:08:38 +05:30
Siddhesh Poyarekar
dc60cb110b Remove commented code 2013-02-25 14:51:57 +05:30
Siddhesh Poyarekar
bab8a695ee Fix whitespace differences between generic and powerpc mpa.c 2013-02-21 14:31:42 +05:30
Siddhesh Poyarekar
20cd7fb3ae Copy comment about inner loop from powerpc mpa.c to the default one 2013-02-20 18:56:20 +05:30
Siddhesh Poyarekar
22af19f9fb Don't require LIM to determine loop end in __sqr 2013-02-16 00:15:57 +05:30
Siddhesh Poyarekar
4709fe7602 Use intermediate variable to compute exponent in __mul 2013-02-16 00:09:29 +05:30
Siddhesh Poyarekar
2d0e0f29f8 Fix determination of lower precision in __mul 2013-02-15 23:56:20 +05:30
Siddhesh Poyarekar
f414520d3c Use __sqr instead of __mul wherever possible 2013-02-14 11:39:14 +05:30
Siddhesh Poyarekar
d6752ccd69 New __sqr function as a faster special case of __mul 2013-02-14 10:31:09 +05:30
Siddhesh Poyarekar
c2af38aa76 Remove unnecessary factorial array 
kf is n! at the end of the loop, so storing the values is unnecessary.
 2013-02-13 17:19:07 +05:30
Siddhesh Poyarekar
4e92d59e26 Better exp polynomial 
The lesser the __mul calls, the better it is for performance.
 2013-02-13 14:49:50 +05:30
Siddhesh Poyarekar
909279a5cf Optimized mp multiplication 
Don't bother multiplying zeroes since that only wastes cycles.
 2013-02-13 14:16:23 +05:30
Siddhesh Poyarekar
bdf028142e Clean up add_magnitudes and sub_magnitudes 2013-02-13 13:55:29 +05:30
Roland McGrath
f1d70dad53 Remove lots of inline keywords. 2013-02-07 14:44:18 -08:00
Siddhesh Poyarekar
caa99d06e7 Simplify calculation of 2^-m in __mpexp 2013-01-18 11:18:13 +05:30
Siddhesh Poyarekar
d3b9ea6148 Remove unnecessary multiplication with RADIXI 2013-01-18 11:14:34 +05:30
Siddhesh Poyarekar
a897655d7b Fix header comment 2013-01-17 15:05:22 +05:30
Siddhesh Poyarekar
f93a8d1569 Consolidate constant defines into mpa.h 2013-01-16 16:06:48 +05:30
Siddhesh Poyarekar
dd930cc571 Fix the value of TWO 2013-01-16 14:53:53 +05:30
David S. Miller
438ebba294 Use libc_fe*() in 32-bit nearbyint() 
* sysdeps/ieee754/dbl-64/s_nearbyint.c (__nearbyint): Use
	libc_feholdexcept and libc_fesetenv.
 2013-01-15 20:32:13 -08:00
Siddhesh Poyarekar
2a91b5735a Minor tweak to mp multiplication 
Add a local variable to remove extra copies to/from memory in the Z
array.
 2013-01-14 21:53:48 +05:30
Siddhesh Poyarekar
1066a53440 Fix code formatting in mpa.c 
This includes the overridden mpa.c in power4.
 2013-01-14 21:53:43 +05:30
Siddhesh Poyarekar
7490eb81ae Fix formatting in mpexp.c 2013-01-10 14:59:18 +05:30
Siddhesh Poyarekar
751b85f795 Make __mpexp_twomm1 an array of doubles 
Cleanup to get rid of the `number` muck which is not necessary here.
 2013-01-10 14:59:18 +05:30
Siddhesh Poyarekar
950c99ca90 Update comments in mpa.c 
Fixed comment style and clearer wording in some cases.
 2013-01-09 19:07:15 +05:30
Siddhesh Poyarekar
fffb407f46 Remove unused __cr and __cpymn 2013-01-04 22:52:12 +05:30
Siddhesh Poyarekar
6420d207bb Fix code formatting 2013-01-04 15:57:13 +05:30
Siddhesh Poyarekar
a9e48ab40e Clean up comment for MP_NO 2013-01-04 15:42:09 +05:30
Siddhesh Poyarekar
b783726459 Remove some commented code 2013-01-04 15:30:34 +05:30
Siddhesh Poyarekar
f8af25d218 Remove commented declarations 2013-01-04 15:10:00 +05:30
Siddhesh Poyarekar
302913e17e Remove argument variable name from function declaration 2013-01-04 14:54:46 +05:30
Joseph Myers
568035b787 Update copyright notices with scripts/update-copyrights. 2013-01-02 19:05:09 +00:00
Siddhesh Poyarekar
0f5477af5d Fix values in __mpexp_twomm1 2013-01-02 17:43:35 +05:30
Siddhesh Poyarekar
44e0d4c20c Split mantissa calculation loop and add branch prediction 2013-01-02 11:44:13 +05:30
Siddhesh Poyarekar
4d55b4e596 Add assert for potential access beyond array bounds in m1np 
The mpexp code has an access into m1np:

  for (i=n-1; i>0; i--,n--) { if (m1np[i][p]+m2>0) break; }

which could break for p >= 18 or i >= 7.  Fortunately this code is
never called due to the way the exp function is implemented since
values having exponent less than -55 return 1.0.  Make sure that if it
gets called in future, it is trapped.
 2013-01-02 11:33:11 +05:30
Siddhesh Poyarekar
da08f647d5 Move more constants into static variables 
Code cleanup.
 2013-01-02 10:07:50 +05:30
Joseph Myers
f4cf5f2d8b Add script to update copyright notices and reformat some to facilitate its use. 2013-01-01 16:29:10 +00:00
Siddhesh Poyarekar
18ea052c3e Favour normal numbers 2012-12-31 16:05:13 +05:30
Siddhesh Poyarekar
085ec079e3 Demystify the magic number 134217729.0 
The number 134217729.0 gets used in various places in e_pow.c but
there is no explanation of what that number is.  Add that explanation.
 2012-12-29 06:56:04 +05:30
Siddhesh Poyarekar
d63f73be34 Remove unnecessary variable mptwoim1 
Code cleanup.
 2012-12-28 19:02:01 +05:30
Siddhesh Poyarekar
6d9f97e1f2 Replace more constants with their values 
Code cleanup.
 2012-12-28 18:53:17 +05:30
Siddhesh Poyarekar
99136f8202 Replace constants with preprocessor defines 
libm Code cleanup.
 2012-12-28 09:40:10 +05:30
Siddhesh Poyarekar
31a7fe5ca9 Remove redundant __mpexp_nn 
It's an array that stores integral float values of the offset.
 2012-12-27 20:43:55 +05:30
Siddhesh Poyarekar
b76eb5f076 Move mpone out to a global const 
Code cleanup.
 2012-12-27 20:43:24 +05:30
Joseph Myers
60e235ee2a Fix spurious underflows from pow with results close to 1 (bug 14811). 2012-11-07 13:03:31 +00:00