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22 lines
620 B
C
22 lines
620 B
C
//
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// arch/x86_64/rsp/vabs.h
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//
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// This file is subject to the terms and conditions defined in
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// 'LICENSE', which is part of this source code package.
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//
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#include "common.h"
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static inline __m128i rsp_vabs(__m128i vs, __m128i vt,
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__m128i zero, __m128i *acc_lo) {
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__m128i vs_zero = _mm_cmpeq_epi16(vs, zero);
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__m128i sign_lt = _mm_srai_epi16(vs, 15);
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__m128i vd = _mm_andnot_si128(vs_zero, vt);
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// Careful: if VT = 0x8000 and VS is negative,
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// acc_lo will be 0x8000 but vd will be 0x7FFF.
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vd = _mm_xor_si128(vd, sign_lt);
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*acc_lo = _mm_sub_epi16(vd, sign_lt);
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return _mm_subs_epi16(vd, sign_lt);
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}
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