medfall

commit 9a4a7d664e423ff714dd3bdf4b9887bac7b9ad88
parent e321958bfc3c3b7bab18f802c26aa524a1e174ff
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sun Jan 17 23:14:42 +0000

Use FTZ/DAZ

Diffstat:
main.cc
 | 
13
+++++++++++++
1 file changed, 13 insertions(+), 0 deletions(-)
diff --git a/main.cc b/main.cc
@@ -4,6 +4,9 @@
 #include <dlfcn.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+// TODO: this won't work on windows
+#include <xmmintrin.h>
+#include <pmmintrin.h>
 
 #include "platform_opengl.h"
 #include <GLFW/glfw3.h>
@@ -92,6 +95,10 @@ int main( int argc, char ** argv ) {
 	float last_frame_time = program_start_time;
 	u64 total_frames = 0;
 
+	// TODO: this won't work on windows
+	_MM_SET_DENORMALS_ZERO_MODE( _MM_DENORMALS_ZERO_ON );
+	_MM_SET_FLUSH_ZERO_MODE( _MM_FLUSH_ZERO_ON );
+
 	while( !glfwWindowShouldClose( window ) ) {
 		const float current_frame_time = glfwGetTime();
 		const float dt = current_frame_time - last_frame_time;
@@ -134,6 +141,12 @@ int main( int argc, char ** argv ) {
 
 		last_frame_time = current_frame_time;
 		total_frames++;
+
+		// TODO: this won't work on windows
+		unsigned int csr = _mm_getcsr();
+		if( ( csr & _MM_FLUSH_ZERO_ON ) == 0 || ( csr & _MM_DENORMALS_ZERO_ON ) == 0 ) {
+			printf( "daz/ftz got switched off\n" );
+		}
 	}
 
 	const float program_run_time = glfwGetTime() - program_start_time;