Revert of SkHalfToFloat_01 / SkFloatToHalf_01 (patchset #11 id:200001 of https://codereview.chromium.org/1685133005/ )

Reason for revert:
Gotta fix Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD

Original issue's description:
> SkHalfToFloat_01 / SkFloatToHalf_01
>
> These are basically inlined, 4-at-a-time versions of our existing functions,
> but cut down to avoid any work that's only necessary outside [0,1].
>
> Both f16 and f32 denorms should work fine modulo the usual ARMv7 NEON denorm==zero caveat.
>
> In exchange for a little speed, f32->f16 does not round properly.
> Instead it truncates, so it's never off by more than 1 bit.
>
> Support for finite values >1 or <0 is straightforward to add back.
> >1 might already work as-is.
>
> Getting close to _u16 performance:
>     micros   	bench
>     261.13  	xferu64_bw_1_opaque_u16
>    1833.51  	xferu64_bw_1_alpha_u16
>    2762.32 ?	xferu64_aa_1_opaque_u16
>    3334.29  	xferu64_aa_1_alpha_u16
>     249.78  	xferu64_bw_1_opaque_f16
>    3383.18  	xferu64_bw_1_alpha_f16
>    4214.72  	xferu64_aa_1_opaque_f16
>    4701.19  	xferu64_aa_1_alpha_f16
>
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1685133005
>
> Committed: https://skia.googlesource.com/skia/+/9ea11a4235b3e3521cc8bf914a27c2d0dc062db9

TBR=jvanverth@google.com,reed@google.com,mtklein@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1693443003

1 files changed, 0 insertions, 35 deletions

diff --git a/tests/Float16Test.cpp b/tests/Float16Test.cpp
index f96d904567..f437268c79 100644
--- a/tests/Float16Test.cpp
+++ b/tests/Float16Test.cpp
@@ -10,7 +10,6 @@
 #include "SkHalf.h"
 #include "SkOpts.h"
 #include "SkPixmap.h"
-#include "SkRandom.h"
 
 static bool eq_within_half_float(float a, float b) {
     const float kTolerance = 1.0f / (1 << (8 + 10));
@@ -65,37 +64,3 @@ DEF_TEST(float_to_half, reporter) {
     SkOpts::half_to_float(fscratch, hs, 7);
     REPORTER_ASSERT(reporter, 0 == memcmp(fscratch, fs, sizeof(fs)));
 }
-
-DEF_TEST(HalfToFloat_01, r) {
-    for (uint16_t h = 0; h < 0x8000; h++) {
-        float f = SkHalfToFloat(h);
-        if (f >= 0 && f <= 1) {
-            REPORTER_ASSERT(r, SkHalfToFloat_01(h)[0] == f);
-            REPORTER_ASSERT(r, SkFloatToHalf_01(SkHalfToFloat_01(h)) == h);
-        }
-    }
-}
-
-DEF_TEST(FloatToHalf_01, r) {
-#if 0
-    for (uint32_t bits = 0; bits < 0x80000000; bits++) {
-#else
-    SkRandom rand;
-    for (int i = 0; i < 1000000; i++) {
-        uint32_t bits = rand.nextU();
-#endif
-        float f;
-        memcpy(&f, &bits, 4);
-        if (f >= 0 && f <= 1) {
-            uint16_t h1 = (uint16_t)SkFloatToHalf_01(Sk4f(f,0,0,0)),
-                     h2 = SkFloatToHalf(f);
-            bool ok = (h1 == h2 || h1 == h2-1);
-            REPORTER_ASSERT(r, ok);
-            if (!ok) {
-                SkDebugf("%08x (%d) -> %04x (%d), want %04x (%d)\n",
-                         bits, bits>>23, h1, h1>>10, h2, h2>>10);
-                break;
-            }
-        }
-    }
-}