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Unified Diff: src/opts/SkMath_opts_SSE2.h

Issue 1262213005: Remove dead code. (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: rename? Created 5 years, 4 months ago
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Index: src/opts/SkMath_opts_SSE2.h
diff --git a/src/opts/SkMath_opts_SSE2.h b/src/opts/SkMath_opts_SSE2.h
deleted file mode 100644
index 2cc21afa0df4ad5d54d4ff997836053c1a68314a..0000000000000000000000000000000000000000
--- a/src/opts/SkMath_opts_SSE2.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright 2014 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkMath_opts_SSE2_DEFINED
-#define SkMath_opts_SSE2_DEFINED
-
-#include <emmintrin.h>
-
-// Because no _mm_div_epi32() in SSE2, we use float division to emulate.
-// When using this function, make sure a and b don't exceed float's precision.
-static inline __m128i shim_mm_div_epi32(const __m128i& a, const __m128i& b) {
- __m128 x = _mm_cvtepi32_ps(a);
- __m128 y = _mm_cvtepi32_ps(b);
- return _mm_cvttps_epi32(_mm_div_ps(x, y));
-}
-
-// Portable version of SkSqrtBits is in SkMath.cpp.
-static inline __m128i SkSqrtBits_SSE2(const __m128i& x, int count) {
- __m128i root = _mm_setzero_si128();
- __m128i remHi = _mm_setzero_si128();
- __m128i remLo = x;
- __m128i one128 = _mm_set1_epi32(1);
-
- do {
- root = _mm_slli_epi32(root, 1);
-
- remHi = _mm_or_si128(_mm_slli_epi32(remHi, 2),
- _mm_srli_epi32(remLo, 30));
- remLo = _mm_slli_epi32(remLo, 2);
-
- __m128i testDiv = _mm_slli_epi32(root, 1);
- testDiv = _mm_add_epi32(testDiv, _mm_set1_epi32(1));
-
- __m128i cmp = _mm_cmplt_epi32(remHi, testDiv);
- __m128i remHi1 = _mm_and_si128(cmp, remHi);
- __m128i root1 = _mm_and_si128(cmp, root);
- __m128i remHi2 = _mm_andnot_si128(cmp, _mm_sub_epi32(remHi, testDiv));
- __m128i root2 = _mm_andnot_si128(cmp, _mm_add_epi32(root, one128));
-
- remHi = _mm_or_si128(remHi1, remHi2);
- root = _mm_or_si128(root1, root2);
- } while (--count >= 0);
-
- return root;
-}
-
-#endif // SkMath_opts_SSE2_DEFINED
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