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Add support to NaN in Float32ToFloat16

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This will be used to test NaN is correctly sampled from float16
textures.

BUG=dawn:128

Change-Id: I6e3b79f438e9a48c3a167ab45baf9f9d019ce48b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/8361
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
This commit is contained in:
Corentin Wallez
2019-06-26 20:26:13 +00:00
committed by Commit Bot service account
parent 7ac0815347
commit 77aa5b59aa
2 changed files with 21 additions and 2 deletions
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17
src/tests/unittests/MathTests.cpp
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@@ -16,6 +16,8 @@
#include "common/Math.h"
#include <cmath>
// Tests for ScanForward
TEST(Math, ScanForward) {
// Test extrema
@@ -133,3 +135,18 @@ TEST(Math, IsAligned) {
ASSERT_FALSE(IsAligned(64 + i, 64));
}
}
// Tests for float32 to float16 conversion
TEST(Math, Float32ToFloat16) {
ASSERT_EQ(Float32ToFloat16(0.0f), 0x0000);
ASSERT_EQ(Float32ToFloat16(-0.0f), 0x8000);
ASSERT_EQ(Float32ToFloat16(INFINITY), 0x7C00);
ASSERT_EQ(Float32ToFloat16(-INFINITY), 0xFC00);
// Check that NaN is converted to a value in one of the float16 NaN ranges
uint16_t nan16 = Float32ToFloat16(NAN);
ASSERT_TRUE(nan16 > 0xFC00 || (nan16 < 0x8000 && nan16 > 0x7C00));
ASSERT_EQ(Float32ToFloat16(1.0f), 0x3C00);
}