#define U_MATH_H
-#include "pipe/p_compiler.h"
-
#include "c99_math.h"
#include <assert.h>
#include <float.h>
#include <stdarg.h>
#include "bitscan.h"
+#include "u_endian.h" /* for UTIL_ARCH_BIG_ENDIAN */
#ifdef __cplusplus
extern "C" {
static inline int
util_ifloor(float f)
{
+#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
+ /*
+ * IEEE floor for computers that round to nearest or even.
+ * 'f' must be between -4194304 and 4194303.
+ * This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",
+ * but uses some IEEE specific tricks for better speed.
+ * Contributed by Josh Vanderhoof
+ */
+ int ai, bi;
+ double af, bf;
+ af = (3 << 22) + 0.5 + (double)f;
+ bf = (3 << 22) + 0.5 - (double)f;
+ /* GCC generates an extra fstp/fld without this. */
+ __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
+ __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
+ return (ai - bi) >> 1;
+#else
int ai, bi;
double af, bf;
union fi u;
u.f = (float) af; ai = u.i;
u.f = (float) bf; bi = u.i;
return (ai - bi) >> 1;
+#endif
}
/**
* Approximate floating point comparison
*/
-static inline boolean
+static inline bool
util_is_approx(float a, float b, float tol)
{
return fabsf(b - a) <= tol;
/**
* Single-float
*/
-static inline boolean
+static inline bool
util_is_inf_or_nan(float x)
{
union fi tmp;
}
-static inline boolean
+static inline bool
util_is_nan(float x)
{
union fi tmp;
/**
* Double-float
*/
-static inline boolean
+static inline bool
util_is_double_inf_or_nan(double x)
{
union di tmp;
}
-static inline boolean
+static inline bool
util_is_double_nan(double x)
{
union di tmp;
/**
* Half-float
*/
-static inline boolean
+static inline bool
util_is_half_inf_or_nan(int16_t x)
{
return (x & 0x7c00) == 0x7c00;
}
-static inline boolean
+static inline bool
util_is_half_nan(int16_t x)
{
return (x & 0x7fff) > 0x7c00;
/**
- * Convert ubyte to float in [0, 1].
+ * Convert uint8_t to float in [0, 1].
*/
static inline float
-ubyte_to_float(ubyte ub)
+ubyte_to_float(uint8_t ub)
{
return (float) ub * (1.0f / 255.0f);
}
/**
- * Convert float in [0,1] to ubyte in [0,255] with clamping.
+ * Convert float in [0,1] to uint8_t in [0,255] with clamping.
*/
-static inline ubyte
+static inline uint8_t
float_to_ubyte(float f)
{
/* return 0 for NaN too */
if (!(f > 0.0f)) {
- return (ubyte) 0;
+ return (uint8_t) 0;
}
else if (f >= 1.0f) {
- return (ubyte) 255;
+ return (uint8_t) 255;
}
else {
union fi tmp;
tmp.f = f;
tmp.f = tmp.f * (255.0f/256.0f) + 32768.0f;
- return (ubyte) tmp.i;
+ return (uint8_t) tmp.i;
+ }
+}
+
+/**
+ * Convert uint16_t to float in [0, 1].
+ */
+static inline float
+ushort_to_float(uint16_t us)
+{
+ return (float) us * (1.0f / 65535.0f);
+}
+
+
+/**
+ * Convert float in [0,1] to uint16_t in [0,65535] with clamping.
+ */
+static inline uint16_t
+float_to_ushort(float f)
+{
+ /* return 0 for NaN too */
+ if (!(f > 0.0f)) {
+ return (uint16_t) 0;
+ }
+ else if (f >= 1.0f) {
+ return (uint16_t) 65535;
+ }
+ else {
+ union fi tmp;
+ tmp.f = f;
+ tmp.f = tmp.f * (65535.0f/65536.0f) + 128.0f;
+ return (uint16_t) tmp.i;
}
}
#endif
}
-
-/**
- * Return number of bits set in n.
- */
-static inline unsigned
-util_bitcount(unsigned n)
-{
-#if defined(HAVE___BUILTIN_POPCOUNT)
- return __builtin_popcount(n);
-#else
- /* K&R classic bitcount.
- *
- * For each iteration, clear the LSB from the bitfield.
- * Requires only one iteration per set bit, instead of
- * one iteration per bit less than highest set bit.
- */
- unsigned bits;
- for (bits = 0; n; bits++) {
- n &= n - 1;
- }
- return bits;
-#endif
-}
-
-
-static inline unsigned
-util_bitcount64(uint64_t n)
-{
-#ifdef HAVE___BUILTIN_POPCOUNTLL
- return __builtin_popcountll(n);
-#else
- return util_bitcount(n) + util_bitcount(n >> 32);
-#endif
-}
-
-
/**
* Reverse bits in n
* Algorithm taken from:
* Convert from little endian to CPU byte order.
*/
-#ifdef PIPE_ARCH_BIG_ENDIAN
+#if UTIL_ARCH_BIG_ENDIAN
#define util_le64_to_cpu(x) util_bswap64(x)
#define util_le32_to_cpu(x) util_bswap32(x)
#define util_le16_to_cpu(x) util_bswap16(x)
static inline void*
util_memcpy_cpu_to_le32(void * restrict dest, const void * restrict src, size_t n)
{
-#ifdef PIPE_ARCH_BIG_ENDIAN
+#if UTIL_ARCH_BIG_ENDIAN
size_t i, e;
assert(n % 4 == 0);
*/
#define CLAMP( X, MIN, MAX ) ( (X)>(MIN) ? ((X)>(MAX) ? (MAX) : (X)) : (MIN) )
+/* Syntax sugar occuring frequently in graphics code */
+#define SATURATE( X ) CLAMP(X, 0.0f, 1.0f)
+
#define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
#define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
#define MAX4( A, B, C, D ) ((A) > (B) ? MAX3(A, C, D) : MAX3(B, C, D))
+/**
+ * Align a value up to an alignment value
+ *
+ * If \c value is not already aligned to the requested alignment value, it
+ * will be rounded up.
+ *
+ * \param value Value to be rounded
+ * \param alignment Alignment value to be used. This must be a power of two.
+ *
+ * \sa ROUND_DOWN_TO()
+ */
+static inline uintptr_t
+ALIGN(uintptr_t value, int32_t alignment)
+{
+ assert(util_is_power_of_two_nonzero(alignment));
+ return (((value) + (alignment) - 1) & ~((alignment) - 1));
+}
+
+/**
+ * Like ALIGN(), but works with a non-power-of-two alignment.
+ */
+static inline uintptr_t
+ALIGN_NPOT(uintptr_t value, int32_t alignment)
+{
+ assert(alignment > 0);
+ return (value + alignment - 1) / alignment * alignment;
+}
+
+/**
+ * Align a value down to an alignment value
+ *
+ * If \c value is not already aligned to the requested alignment value, it
+ * will be rounded down.
+ *
+ * \param value Value to be rounded
+ * \param alignment Alignment value to be used. This must be a power of two.
+ *
+ * \sa ALIGN()
+ */
+static inline uintptr_t
+ROUND_DOWN_TO(uintptr_t value, int32_t alignment)
+{
+ assert(util_is_power_of_two_nonzero(alignment));
+ return ((value) & ~(alignment - 1));
+}
+
/**
* Align a value, only works pot alignemnts.
*/
void
util_fpstate_set(unsigned fpstate);
-
+/**
+ * For indexed draw calls, return true if the vertex count to be drawn is
+ * much lower than the vertex count that has to be uploaded, meaning
+ * that the driver should flatten indices instead of trying to upload
+ * a too big range.
+ *
+ * This is used by vertex upload code in u_vbuf and glthread.
+ */
+static inline bool
+util_is_vbo_upload_ratio_too_large(unsigned draw_vertex_count,
+ unsigned upload_vertex_count)
+{
+ if (draw_vertex_count > 1024)
+ return upload_vertex_count > draw_vertex_count * 4;
+ else if (draw_vertex_count > 32)
+ return upload_vertex_count > draw_vertex_count * 8;
+ else
+ return upload_vertex_count > draw_vertex_count * 16;
+}
#ifdef __cplusplus
}
projects / mesa.git / blobdiff