Sam Lantinga <slouken@libsdl.org> [Mon, 15 Sep 2008 04:32:36 +0000] rev 2753
indent
Sam Lantinga <slouken@libsdl.org> [Mon, 15 Sep 2008 04:31:30 +0000] rev 2752
http://sources.redhat.com/ml/newlib/2002/msg00230.html Stephen L Moshier wrote: > > pow(x,y) returns 0 when x is very close to -1.0 and y is very large. > The following test program prints > > pow(1.0000000000000002e+00 4.5035996273704970e+15) = 2.7182818284590455e+00 > pow(-1.0000000000000002e+00 4.5035996273704970e+15) =0.0000000000000000e+00 > pow(9.9999999999999978e-01 4.5035996273704970e+15) = 3.6787944117144222e-01 > pow(-9.9999999999999978e-01 4.5035996273704970e+15) = 0.0000000000000000e+00 > > which is incorrect for the negative arguments raised to an odd integer > power. > > ----- > double pow (double, double); > > int > main () > { > double x, y, z; > > x = 1.0 + pow (2.0, -52.0); > y = 1.0 + pow (2.0, 52.0); > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = -x; > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = 1.0 - pow (2.0, -52.0); > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = -x; > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > } > ----- > > Here is a patch for newlib/libm/math/epow.c: Patch checked in and duplicated for ef_pow.c. Thanks. -- Jeff J.
Ryan C. Gordon <icculus@icculus.org> [Mon, 08 Sep 2008 07:38:41 +0000] rev 2751
Merged r4082:4083 from branches/SDL-1.2: sparc64 crash fix.
Darren Alton <dalton@stevens.edu> [Sat, 06 Sep 2008 04:31:34 +0000] rev 2750
Fixes to the NDS sprite2 test. Illustrates partially working texture-as-sprite functionality.
Darren Alton <dalton@stevens.edu> [Sat, 06 Sep 2008 00:10:16 +0000] rev 2749
Initial work for NDS haptic support.
Edgar Simo <bobbens@gmail.com> [Thu, 04 Sep 2008 13:43:39 +0000] rev 2748
Allow testing haptic devices by index.
Holmes Futrell <hfutrell@umail.ucsb.edu> [Tue, 02 Sep 2008 20:27:47 +0000] rev 2747