Clean up hyper-local SkCpu feature test experiment.

src/opts/SkNx_sse.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkNx_sse_DEFINED
 #define SkNx_sse_DEFINED
 
-#include "SkCpu.h"
 #include <immintrin.h>
 
 // This file may assume <= SSE2, but must check SK_CPU_SSE_LEVEL for anything more recent.
 // If you do, make sure this is in a static inline function... anywhere else risks violating ODR.
 
 #define SKNX_IS_FAST
 
 template <>
 class SkNx<2, float> {
 public:
@@ skipping 62 matching lines @@
     SkNx operator  < (const SkNx& o) const { return _mm_cmplt_ps (fVec, o.fVec); }
     SkNx operator  > (const SkNx& o) const { return _mm_cmpgt_ps (fVec, o.fVec); }
     SkNx operator <= (const SkNx& o) const { return _mm_cmple_ps (fVec, o.fVec); }
     SkNx operator >= (const SkNx& o) const { return _mm_cmpge_ps (fVec, o.fVec); }
 
     static SkNx Min(const SkNx& l, const SkNx& r) { return _mm_min_ps(l.fVec, r.fVec); }
     static SkNx Max(const SkNx& l, const SkNx& r) { return _mm_max_ps(l.fVec, r.fVec); }
 
     SkNx abs() const { return _mm_andnot_ps(_mm_set1_ps(-0.0f), fVec); }
     SkNx floor() const {
-        if (SkCpu::Supports(SkCpu::SSE41)) {
-            __m128 r;
-        #if defined(__GNUC__) || defined(__clang__)
-            asm("roundps $0x1, %[fVec], %[r]" : [r]"=x"(r) : [fVec]"x"(fVec));
-        #else
-            r = _mm_floor_ps(fVec);
-        #endif
-            return r;
-        }
+    #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41
+        return _mm_floor_ps(fVec);
+    #else
         // Emulate _mm_floor_ps() with SSE2:
         //   - roundtrip through integers via truncation
         //   - subtract 1 if that's too big (possible for negative values).
         // This restricts the domain of our inputs to a maximum somehwere around 2^31.
         // Seems plenty big.
         __m128 roundtrip = _mm_cvtepi32_ps(_mm_cvttps_epi32(fVec));
         __m128 too_big = _mm_cmpgt_ps(roundtrip, fVec);
         return _mm_sub_ps(roundtrip, _mm_and_ps(too_big, _mm_set1_ps(1.0f)));
+    #endif
     }
 
     SkNx   sqrt() const { return _mm_sqrt_ps (fVec);  }
     SkNx  rsqrt() const { return _mm_rsqrt_ps(fVec); }
     SkNx invert() const { return _mm_rcp_ps(fVec); }
 
     float operator[](int k) const {
         SkASSERT(0 <= k && k < 4);
         union { __m128 v; float fs[4]; } pun = {fVec};
         return pun.fs[k&3];
     }
 
     bool allTrue() const { return 0xffff == _mm_movemask_epi8(_mm_castps_si128(fVec)); }
     bool anyTrue() const { return 0x0000 != _mm_movemask_epi8(_mm_castps_si128(fVec)); }
 
     SkNx thenElse(const SkNx& t, const SkNx& e) const {
-#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41
+    #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41
         return _mm_blendv_ps(e.fVec, t.fVec, fVec);
-#else
+    #else
         return _mm_or_ps(_mm_and_ps   (fVec, t.fVec),
                          _mm_andnot_ps(fVec, e.fVec));
-#endif
+    #endif
     }
 
     __m128 fVec;
 };
 
 template <>
 class SkNx<4, int> {
 public:
     SkNx(const __m128i& vec) : fVec(vec) {}
 
@@ skipping 228 matching lines @@
 
 template<> /*static*/ inline Sk4h SkNx_cast<uint16_t, uint8_t>(const Sk4b& src) {
     return _mm_unpacklo_epi8(src.fVec, _mm_setzero_si128());
 }
 
 template<> /*static*/ inline Sk4b SkNx_cast<uint8_t, uint16_t>(const Sk4h& src) {
     return _mm_packus_epi16(src.fVec, src.fVec);
 }
 
 #endif//SkNx_sse_DEFINED