moved over the polyfiller code and implemented blending

[bootcensus] / src / census / util.h

diff --git a/src/census/util.h b/src/census/util.h
new file mode 100644 (file)
index 0000000..76dd044
--- /dev/null
+++ b/src/census/util.h
@@ -0,0 +1,102 @@
+#ifndef UTIL_H_
+#define UTIL_H_
+
+#include "inttypes.h"
+
+#ifdef __GNUC__
+#define INLINE __inline
+
+#elif defined(__WATCOMC__)
+#define INLINE __inline
+
+#else
+#define INLINE
+#endif
+
+/* fast conversion of double -> 32bit int
+ * for details see:
+ *  - http://chrishecker.com/images/f/fb/Gdmfp.pdf
+ *  - http://stereopsis.com/FPU.html#convert
+ */
+static INLINE int32_t cround64(double val)
+{
+       val += 6755399441055744.0;
+       return *(int32_t*)&val;
+}
+
+extern uint32_t perf_start_count, perf_interval_count;
+
+#ifdef __WATCOMC__
+void perf_start(void);
+#pragma aux perf_start = \
+       "xor eax, eax" \
+       "cpuid" \
+       "rdtsc" \
+       "mov [perf_start_count], eax" \
+       modify[eax ebx ecx edx];
+
+void perf_end(void);
+#pragma aux perf_end = \
+       "xor eax, eax" \
+       "cpuid" \
+       "rdtsc" \
+       "sub eax, [perf_start_count]" \
+       "mov [perf_interval_count], eax" \
+       modify [eax ebx ecx edx];
+
+void debug_break(void);
+#pragma aux debug_break = "int 3";
+#endif
+
+#ifdef __GNUC__
+#define perf_start()  asm volatile ( \
+       "xor %%eax, %%eax\n" \
+       "cpuid\n" \
+       "rdtsc\n" \
+       "mov %%eax, %0\n" \
+       : "=m"(perf_start_count) \
+       :: "%eax", "%ebx", "%ecx", "%edx")
+
+#define perf_end() asm volatile ( \
+       "xor %%eax, %%eax\n" \
+       "cpuid\n" \
+       "rdtsc\n" \
+       "sub %1, %%eax\n" \
+       "mov %%eax, %0\n" \
+       : "=m"(perf_interval_count) \
+       : "m"(perf_start_count) \
+       : "%eax", "%ebx", "%ecx", "%edx")
+
+#define debug_break() \
+       asm volatile ("int $3")
+#endif
+
+#ifdef _MSC_VER
+#define perf_start() \
+       do { \
+               __asm { \
+                       xor eax, eax \
+                       cpuid \
+                       rdtsc \
+                       mov [perf_start_count], eax \
+               } \
+       } while(0)
+
+#define perf_end() \
+       do { \
+               __asm { \
+                       xor eax, eax \
+                       cpuid \
+                       rdtsc \
+                       sub eax, [perf_start_count] \
+                       mov [perf_interval_count], eax \
+               } \
+       } while(0)
+
+#define debug_break() \
+       do { \
+               __asm { int 3 } \
+       } while(0)
+#endif
+
+#endif /* UTIL_H_ */