remove unimportant bench

Change-Id: I98d0a2295c4853e0c07d84e781c8b0236561d307
Reviewed-on: https://skia-review.googlesource.com/133584
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>

1 files changed, 0 insertions, 93 deletions

diff --git a/bench/pack_int_uint16_t_Bench.cpp b/bench/pack_int_uint16_t_Bench.cpp
deleted file mode 100644
index 5e1527d7ca..0000000000
--- a/bench/pack_int_uint16_t_Bench.cpp
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "Benchmark.h"
-#include "SkTypes.h"
-
-/**
- * There's a good variety of ways to pack from int down to uint16_t with SSE,
- * depending on the specific instructions available.
- *
- * SSE2 offers an int -> int16_t pack instruction.  We can use this in two ways:
- *    - subtract off 32768, int -> int16_t, add 32768 back                                  (sse2_a)
- *    - first artificially sign extend the (positive) value in our int, then int -> int16_t (sse2_b)
- * SSSE3 adds a byte shuffle, so we just put the bytes where we want them.                  (ssse3)
- * SSE41 added an int -> uint16_t pack instruction.                                         (sse41)
- *
- * Findings so far:
- *   - sse41 < ssse3 <<< sse2_b < sse2_a;
- *   - the ssse3 version is only slightly slower than the sse41 version, maybe not at all
- *   - the sse2_a is only slightly slower than the sse2_b version
- *   - the ssse3 and sse41 versions are about 3x faster than either sse2 version
- *   - the sse41 version seems to cause some code generation trouble.
- */
-
-#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
-
-#include <immintrin.h>
-
-template <__m128i (kernel)(__m128i)>
-class pack_int_uint16_t_Bench : public Benchmark {
-public:
-    pack_int_uint16_t_Bench(const char* impl) {
-        fName.append("pack_int_uint16_t_");
-        fName.append(impl);
-    }
-
-    bool isSuitableFor(Backend backend) override { return backend == kNonRendering_Backend; }
-    const char* onGetName() override { return fName.c_str(); }
-
-    void onDraw(int loops, SkCanvas*) override {
-        __m128i x = _mm_set1_epi32(0x42424242);
-        while (loops --> 0) {
-            x = kernel(x);
-        }
-
-        volatile int blackhole = 0;
-        blackhole ^= _mm_cvtsi128_si32(x);
-    }
-
-    SkString fName;
-};
-
-namespace {
-    __m128i sse2_a(__m128i x) {
-        x = _mm_sub_epi32(x, _mm_set1_epi32(0x8000));
-        return _mm_add_epi16(_mm_packs_epi32(x,x), _mm_set1_epi16((short)0x8000));
-    }
-}
-DEF_BENCH( return new pack_int_uint16_t_Bench<sse2_a>("sse2_a"); )
-
-namespace {
-    __m128i sse2_b(__m128i x) {
-        x = _mm_srai_epi32(_mm_slli_epi32(x, 16), 16);
-        return _mm_packs_epi32(x,x);
-    }
-}
-DEF_BENCH( return new pack_int_uint16_t_Bench<sse2_b>("sse2_b"); )
-
-#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
-namespace {
-    __m128i ssse3(__m128i x) {
-        // TODO: Can we force the bench to load the mask inside the loop?  Would be more realistic.
-        const int _ = ~0;
-        return _mm_shuffle_epi8(x, _mm_setr_epi8(0,1, 4,5, 8,9, 12,13, _,_,_,_,_,_,_,_));
-    }
-}
-DEF_BENCH( return new pack_int_uint16_t_Bench<ssse3>("ssse3"); )
-#endif
-
-#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41
-namespace {
-    __m128i sse41(__m128i x) {
-        return _mm_packus_epi32(x,x);
-    }
-}
-DEF_BENCH( return new pack_int_uint16_t_Bench<sse41>("sse41"); )
-#endif
-
-#endif  // SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2