More GL_EXT_framebuffer_object: rename some things, added device driver hooks.

[mesa.git] / src / mesa / main / imports.h

diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index bee7d8aad12c4c88512f846d741ec38392c04d25..5158bcd8b252e1a66d548f3a6c969e3ea8bab1dd 100644 (file)
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -1,14 +1,6 @@
-/**
- * \file imports.h
- * Standard C library function wrappers.
- *
- * This file provides wrappers for all the standard C library functions
- * like malloc(), free(), printf(), getenv(), etc.
- */
-
 /*
  * Mesa 3-D graphics library
- * Version:  6.1
+ * Version:  6.2
  *
  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
  *
@@ -31,6 +23,15 @@
  */
 
 
+/**
+ * \file imports.h
+ * Standard C library function wrappers.
+ *
+ * This file provides wrappers for all the standard C library functions
+ * like malloc(), free(), printf(), getenv(), etc.
+ */
+
+
 #ifndef IMPORTS_H
 #define IMPORTS_H
 
@@ -99,7 +100,7 @@ extern "C" {
  * this macro.
  * Both pointers/offsets are expressed in bytes.
  */
-#define ADD_POINTERS(A, B)  ( (A) + (unsigned long) (B) )
+#define ADD_POINTERS(A, B)  ( (GLubyte *) (A) + (unsigned long) (B) )
 
 
 /**********************************************************************/
@@ -197,6 +198,20 @@ extern void _ext_mesa_free_pixelbuffer( void *pb );
 /*@}*/
 
 
+/**********************************************************************/
+
+
+/**
+ * Sometimes we treat GLfloats as GLints.  On x86 systems, moving a float
+ * as a int (thereby using integer registers instead of FP registers) is
+ * a performance win.  Typically, this can be done with ordinary casts.
+ * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)
+ * these casts generate warnings.
+ * The following union typedef is used to solve that.
+ */
+typedef union { GLfloat f; GLint i; } fi_type;
+
+
 
 /**********************************************************************
  * Math macros
@@ -222,9 +237,13 @@ extern void _ext_mesa_free_pixelbuffer( void *pb );
  *** USE_IEEE: Determine if we're using IEEE floating point
  ***/
 #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
-    defined(__s390x__) || defined(__powerpc__) || defined(__AMD64__) || \
-    defined(__ia64__) || \
-    ( defined(__alpha__) && ( defined(__IEEE_FLOAT) || !defined(VMS) ) )
+    defined(__s390x__) || defined(__powerpc__) || \
+    defined(__amd64__) || \
+    defined(ia64) || defined(__ia64__) || \
+    defined(__hppa__) || defined(hpux) || \
+    defined(__mips) || defined(_MIPS_ARCH) || \
+    defined(__arm__) || \
+    (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS)))
 #define USE_IEEE
 #define IEEE_ONE 0x3f800000
 #endif
@@ -321,8 +340,13 @@ static INLINE int IS_INF_OR_NAN( float x )
  *** IS_NEGATIVE: test if float is negative
  ***/
 #if defined(USE_IEEE)
-#define GET_FLOAT_BITS(x) ((fi_type *) &(x))->i
-#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) & (1<<31))
+static INLINE int GET_FLOAT_BITS( float x )
+{
+   fi_type fi;
+   fi.f = x;
+   return fi.i;
+}
+#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)
 #else
 #define IS_NEGATIVE(x) (x < 0.0F)
 #endif
@@ -373,7 +397,8 @@ static INLINE int iround(float f)
    return r;
 }
 #define IROUND(x)  iround(x)
-#elif defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
+#elif defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__) && \
+                       (!defined(__BEOS__) || (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)))
 static INLINE int iround(float f)
 {
    int r;
@@ -547,14 +572,9 @@ static INLINE int iceil(float f)
 
 
 /***
- *** COPY_FLOAT: copy a float from src to dest, avoid slow FP regs if possible
+ *** COPY_FLOAT: copy a float from src to dest.
  ***/
-#if defined(USE_IEEE) && !defined(DEBUG)
-#define COPY_FLOAT( dst, src )                                 \
-       ((fi_type *) &(dst))->i = ((fi_type *) &(src))->i
-#else
 #define COPY_FLOAT( dst, src )         (dst) = (src)
-#endif
 
 
 /***
@@ -705,11 +725,11 @@ _mesa_log2(float x);
 extern unsigned int
 _mesa_bitcount(unsigned int n);
 
-extern GLhalfNV
+extern GLhalfARB
 _mesa_float_to_half(float f);
 
 extern float
-_mesa_half_to_float(GLhalfNV h);
+_mesa_half_to_float(GLhalfARB h);
 
 
 extern char *