Add end2end test for all vertex formats
BUG=dawn:41
Change-Id: I37bde37843522a8d7c8b3bea1cb24c0971efd8e2
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6340
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Shaobo Yan <shaobo.yan@intel.com>
diff --git a/src/common/Math.cpp b/src/common/Math.cpp
index 6aec721..d9217c8 100644
--- a/src/common/Math.cpp
+++ b/src/common/Math.cpp
@@ -16,6 +16,8 @@
#include "common/Assert.h"
+#include <algorithm>
+
#if defined(DAWN_COMPILER_MSVC)
# include <intrin.h>
#endif
@@ -77,3 +79,29 @@
uint32_t alignment32 = static_cast<uint32_t>(alignment);
return (value + (alignment32 - 1)) & ~(alignment32 - 1);
}
+
+uint16_t Float32ToFloat16(float fp32) {
+ uint32_t fp32i = BitCast<uint32_t>(fp32);
+ uint32_t sign16 = (fp32i & 0x80000000) >> 16;
+ uint32_t mantissaAndExponent = fp32i & 0x7FFFFFFF;
+
+ if (mantissaAndExponent > 0x47FFEFFF) { // Infinity
+ return static_cast<uint16_t>(sign16 | 0x7FFF);
+ } else if (mantissaAndExponent < 0x38800000) { // Denormal
+ uint32_t mantissa = (mantissaAndExponent & 0x007FFFFF) | 0x00800000;
+ int32_t exponent = 113 - (mantissaAndExponent >> 23);
+
+ if (exponent < 24) {
+ mantissaAndExponent = mantissa >> exponent;
+ } else {
+ mantissaAndExponent = 0;
+ }
+
+ return static_cast<uint16_t>(
+ sign16 | (mantissaAndExponent + 0x00000FFF + ((mantissaAndExponent >> 13) & 1)) >> 13);
+ } else {
+ return static_cast<uint16_t>(sign16 | (mantissaAndExponent + 0xC8000000 + 0x00000FFF +
+ ((mantissaAndExponent >> 13) & 1)) >>
+ 13);
+ }
+}