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mesa: move fpclassify work-arounds into c99_math.h

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v2: Use #error in the #else clause, per Jose.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
This commit is contained in:
Brian Paul 2015-03-07 13:15:22 -07:00
parent 70dc8a9930
commit be4e198be0
2 changed files with 45 additions and 50 deletions
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44
include/c99_math.h
View File

@ -161,4 +161,48 @@ llrintf(float f)
#endif
#if defined(fpclassify)
/* ISO C99 says that fpclassify is a macro. Assume that any implementation
* of fpclassify, whether it's in a C99 compiler or not, will be a macro.
*/
#elif defined(__cplusplus)
/* For C++, fpclassify() should be defined in <cmath> */
#elif defined(_MSC_VER)
/* Not required on VS2013 and above. Oddly, the fpclassify() function
* doesn't exist in such a form on MSVC. This is an implementation using
* slightly different lower-level Windows functions.
*/
#include <float.h>
static inline enum {FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, FP_NORMAL}
fpclassify(double x)
{
switch(_fpclass(x)) {
case _FPCLASS_SNAN: /* signaling NaN */
case _FPCLASS_QNAN: /* quiet NaN */
return FP_NAN;
case _FPCLASS_NINF: /* negative infinity */
case _FPCLASS_PINF: /* positive infinity */
return FP_INFINITE;
case _FPCLASS_NN: /* negative normal */
case _FPCLASS_PN: /* positive normal */
return FP_NORMAL;
case _FPCLASS_ND: /* negative denormalized */
case _FPCLASS_PD: /* positive denormalized */
return FP_SUBNORMAL;
case _FPCLASS_NZ: /* negative zero */
case _FPCLASS_PZ: /* positive zero */
return FP_ZERO;
default:
/* Should never get here; but if we do, this will guarantee
* that the pattern is not treated like a number.
*/
return FP_NAN;
}
}
#else
#error "Need to include or define an fpclassify function"
#endif
#endif /* #define _C99_MATH_H_ */

51
src/mesa/main/querymatrix.c
View File

@ -13,7 +13,7 @@
#include <stdlib.h>
#include <math.h>
#include "c99_math.h"
#include "glheader.h"
#include "querymatrix.h"
#include "main/get.h"
@ -37,55 +37,6 @@
#define INT_TO_FIXED(x) ((GLfixed) ((x) << 16))
#define FLOAT_TO_FIXED(x) ((GLfixed) ((x) * 65536.0))
#if defined(fpclassify)
/* ISO C99 says that fpclassify is a macro. Assume that any implementation
* of fpclassify, whether it's in a C99 compiler or not, will be a macro.
*/
#elif defined(_MSC_VER)
/* Not required on VS2013 and above. */
/* Oddly, the fpclassify() function doesn't exist in such a form
* on MSVC. This is an implementation using slightly different
* lower-level Windows functions.
*/
#include <float.h>
enum {FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, FP_NORMAL}
fpclassify(double x)
{
switch(_fpclass(x)) {
case _FPCLASS_SNAN: /* signaling NaN */
case _FPCLASS_QNAN: /* quiet NaN */
return FP_NAN;
case _FPCLASS_NINF: /* negative infinity */
case _FPCLASS_PINF: /* positive infinity */
return FP_INFINITE;
case _FPCLASS_NN: /* negative normal */
case _FPCLASS_PN: /* positive normal */
return FP_NORMAL;
case _FPCLASS_ND: /* negative denormalized */
case _FPCLASS_PD: /* positive denormalized */
return FP_SUBNORMAL;
case _FPCLASS_NZ: /* negative zero */
case _FPCLASS_PZ: /* positive zero */
return FP_ZERO;
default:
/* Should never get here; but if we do, this will guarantee
* that the pattern is not treated like a number.
*/
return FP_NAN;
}
}
#else
enum {FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, FP_NORMAL}
fpclassify(double x)
{
/* XXX do something better someday */
return FP_NORMAL;
}
#endif
GLbitfield GLAPIENTRY _mesa_QueryMatrixxOES(GLfixed mantissa[16], GLint exponent[16])
{