Clang as default compiler November 4th

[Steve Kargl]

On Fri, Sep 14, 2012 at 05:18:08PM -0700, Steve Kargl wrote:
> 
> A third class of failure appears to be that clang emits
> i387 fpu instructions for at least sinf and cosf instead 
> of calls to the library routines.  AFAIK, the library
> routines are faster and more accurate.
> 

Yep. Clang has problems with at least sinf on i386 FreeBSD.

% pwd
/usr/home/kargl/trunk/math/sine

% make clean && make CC=cc testf
cc -o testf -O2 -pipe -static -I/usr/local/include -I../mp testf.c \
 -L/usr/local/lib -L../mp -lsgk -lmpfr -lgmp -lm

% ./testf -m 0 -M 1e20 -r
 ULP Range |
-----------+-------------------------
 [0.0:0.6] | 1006424    (100.00%)
 (0.6:0.7] | 0  ( 0.00%)
 (0.7:0.8] | 0  ( 0.00%)
 (0.8:0.9] | 0  ( 0.00%)
 (0.9:1.0] | 0  ( 0.00%)
 (1.0:2.0] | 0  ( 0.00%)
 (2.0:3.0] | 0  ( 0.00%)
 3.0 < ULP | 0  ( 0.00%)
-----------+-------------------------
   Count   | 1006424
   Max ULP | 0.50084
 Max ULP x | 53462490661259313152.000000 0x1.72f876p+65

% make clean && make CC=clang testf
clang -o testf -O2 -pipe -static -I/usr/local/include -I../mp testf.c \
 -L/usr/local/lib -L../mp -lsgk -lmpfr -lgmp -lm

% ./testf -m 0 -M 1e20 -r
 ULP Range |
-----------+-------------------------
 [0.0:0.6] | 1  ( 0.00%)
 (0.6:0.7] | 0  ( 0.00%)
 (0.7:0.8] | 0  ( 0.00%)
 (0.8:0.9] | 0  ( 0.00%)
 (0.9:1.0] | 0  ( 0.00%)
 (1.0:2.0] | 0  ( 0.00%)
 (2.0:3.0] | 0  ( 0.00%)
 3.0 < ULP | 999998     (100.00%)
-----------+-------------------------
   Count   | 999999
   Max ULP | 1328505256679420125050194353979392.00000
 Max ULP x | 75516780764213542912.000000 0x1.06006p+66

-- 
Steve