[GPU] Non-ROV f24 trunc/round, host shader modifications, cache dir

src/xenia/gpu/xenos.h

@@ -305,6 +305,9 @@ enum class DepthRenderTargetFormat : uint32_t {
 
 const char* GetDepthRenderTargetFormatName(DepthRenderTargetFormat format);
 
+// Converts an IEEE-754 32-bit floating-point number to Xenos floating-point
+// depth, rounding to the nearest even.
+uint32_t Float32To20e4(float f32);
 // Converts Xenos floating-point depth in bits 0:23 (not clamping) to an
 // IEEE-754 32-bit floating-point number.
 float Float20e4To32(uint32_t f24);