new version of SkHalfToFloat_01
This is a little faster than the previous version, and much better explained.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1688233002
Review URL: https://codereview.chromium.org/1688233002
diff --git a/tests/Float16Test.cpp b/tests/Float16Test.cpp
index f96d904..3b13533 100644
--- a/tests/Float16Test.cpp
+++ b/tests/Float16Test.cpp
@@ -66,10 +66,23 @@
REPORTER_ASSERT(reporter, 0 == memcmp(fscratch, fs, sizeof(fs)));
}
+static uint32_t u(float f) {
+ uint32_t x;
+ memcpy(&x, &f, 4);
+ return x;
+}
+
DEF_TEST(HalfToFloat_01, r) {
for (uint16_t h = 0; h < 0x8000; h++) {
float f = SkHalfToFloat(h);
if (f >= 0 && f <= 1) {
+ float got = SkHalfToFloat_01(h)[0];
+ if (got != f) {
+ SkDebugf("0x%04x -> 0x%08x (%g), want 0x%08x (%g)\n",
+ h,
+ u(got), got,
+ u(f), f);
+ }
REPORTER_ASSERT(r, SkHalfToFloat_01(h)[0] == f);
REPORTER_ASSERT(r, SkFloatToHalf_01(SkHalfToFloat_01(h)) == h);
}