Remove dead code.
BUG=skia:4117 R=mtklein@google.com Review URL: https://codereview.chromium.org/1262213005 .
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/*
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* Copyright 2014 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkMath_opts_SSE2_DEFINED
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#define SkMath_opts_SSE2_DEFINED
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#include <emmintrin.h>
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// Because no _mm_div_epi32() in SSE2, we use float division to emulate.
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// When using this function, make sure a and b don't exceed float's precision.
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static inline __m128i shim_mm_div_epi32(const __m128i& a, const __m128i& b) {
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__m128 x = _mm_cvtepi32_ps(a);
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__m128 y = _mm_cvtepi32_ps(b);
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return _mm_cvttps_epi32(_mm_div_ps(x, y));
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}
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// Portable version of SkSqrtBits is in SkMath.cpp.
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static inline __m128i SkSqrtBits_SSE2(const __m128i& x, int count) {
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__m128i root = _mm_setzero_si128();
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__m128i remHi = _mm_setzero_si128();
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__m128i remLo = x;
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__m128i one128 = _mm_set1_epi32(1);
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do {
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root = _mm_slli_epi32(root, 1);
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remHi = _mm_or_si128(_mm_slli_epi32(remHi, 2),
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_mm_srli_epi32(remLo, 30));
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remLo = _mm_slli_epi32(remLo, 2);
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__m128i testDiv = _mm_slli_epi32(root, 1);
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testDiv = _mm_add_epi32(testDiv, _mm_set1_epi32(1));
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__m128i cmp = _mm_cmplt_epi32(remHi, testDiv);
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__m128i remHi1 = _mm_and_si128(cmp, remHi);
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__m128i root1 = _mm_and_si128(cmp, root);
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__m128i remHi2 = _mm_andnot_si128(cmp, _mm_sub_epi32(remHi, testDiv));
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__m128i root2 = _mm_andnot_si128(cmp, _mm_add_epi32(root, one128));
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remHi = _mm_or_si128(remHi1, remHi2);
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root = _mm_or_si128(root1, root2);
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} while (--count >= 0);
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return root;
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}
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#endif // SkMath_opts_SSE2_DEFINED
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