[Bug 1740] Change PowerPC multi-libs for e200 and e500 cores

[bugzilla-daemon at rtems.org]

https://www.rtems.org/bugzilla/show_bug.cgi?id=1740

--- Comment #12 from Sebastian Huber <sebastian.huber at embedded-brains.de> 2011-02-23 03:11:08 CST ---
(In reply to comment #10)
> (In reply to comment #9)
> > Created an attachment (id=1111)
 --> (https://www.rtems.org/bugzilla/attachment.cgi?id=1111) [details]
[details]
> > Patch against GCC 4.5.2.
> 
> > (1) -mcpu=8540 -msoft-float
> > (2) -mcpu=8540 -mspe -mabi=spe -mfloat-gprs=single
> > (3) -mcpu=8540 -mspe -mabi=spe -mfloat-gprs=double
> 
> > The paranoia test program works with all three variants.  Only (1) is full IEEE
> > 754 conform,
> 
> I guess you are not aware what you are saying here?

Yes, I know what I am saying here.  The embedded floating point unit requires
software support for full IEEE 754 conformance (see also Signal Processing
Engine (SPE) Programming Environments Manual: 3.3.1.4
IEEE Std 754™ Compliance).

The test results look not that bad, even without this software support and
options (3):

 *** COMPLEX MATH TEST ***
 cabs   : 1.414214
-cacos  : 0.904557 0.000000i
+cacos  : 0.904557 -1.061275i
 cacosh : 1.061275 0.904557i
 carg   : 0.785398
 casin  : 0.666239 1.061275i

 *** DOUBLE MATH TEST ***
 acos           : 1.570796
-acosh          :
17976931348623157081452742373170435679807056752584499659891747680315726078002853876058955863276687817154045895351438246423432132688946418276846754670
+acosh          : -nan
 asin           : 1.570796
 asinh          : 0.881374
 atan           : 0.665774
 atan2          : 0.785398
-atanh          :
17976931348623157081452742373170435679807056752584499659891747680315726078002853876058955863276687817154045895351438246423432132688946418276846754670
+atanh          : inf
 cbrt           : 3.000000
 ceil           : 4.000000
 copysign       : -3.500000

 *** FLOAT MATH TEST ***
 acosf          : 1.570796
-acoshf         : 340282346638528859811704183484516925440.000000
+acoshf         : -nan
 asinf          : 1.570796
 asinhf         : 0.881374
 atanf          : 0.665774
 atan2f         : 0.785398
-atanhf         : 340282346638528859811704183484516925440.000000
+atanhf         : inf
 cbrtf          : 3.000000
 ceilf          : 4.000000
 copysignf      : -3.500000
@@ -50,14 +50,14 @@
 logf           : 3.737670
 log10f         : 1.623249
 log1pf         : 3.761200
-log2f          : 5.392318
+log2f          : 5.392317
 logbf          : 5.000000
 lrintf         : 0.000000
 lrintf         : 0.000000
 lroundf        : -1.000000
 lroundf        : 1.000000
 lmodff         : 0.000000
-nanf           :
17976931348623157081452742373170435679807056752584499659891747680315726078002853876058955863276687817154045895351438246423432132688946418276846754670
+nanf           : nan
 nearbyintf     : 2.000000
 nextafterf     : 1.500000
 powf           : 9.060100
@@ -77,7 +77,7 @@
 tanhf          : 0.655794
 tgammaf        : 1.046486
 truncf         : 3.000000
-y0f            : 0.228084
+y0f            : 0.228083
 y1f            : -0.621136
 ynf            : -3.589899
 *** END OF FLOAT MATH TEST ***

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