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| ** This file is part of the QtCore module of the Qt Toolkit. |
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| |
| #include "private/qsimd_p.h" |
| |
| // The x86 F16C instructions operate on AVX registers, so AVX support is |
| // required. We don't need to check for __F16C__ because we this file wouldn't |
| // have been compiled if the support was missing in the first place, and not |
| // all compilers define it. Technically, we didn't need to check for __AVX__ |
| // either. |
| #if !QT_COMPILER_SUPPORTS_HERE(AVX) |
| # error "AVX support required" |
| #endif |
| |
| #ifdef __cplusplus |
| QT_BEGIN_NAMESPACE |
| extern "C" { |
| #endif |
| |
| QT_FUNCTION_TARGET(F16C) |
| void qFloatToFloat16_fast(quint16 *out, const float *in, qsizetype len) Q_DECL_NOEXCEPT |
| { |
| qsizetype i = 0; |
| int epilog_i; |
| for (; i < len - 7; i += 8) |
| _mm_storeu_si128((__m128i *)(out + i), _mm256_cvtps_ph(_mm256_loadu_ps(in + i), 0)); |
| if (i < len - 3) { |
| _mm_storel_epi64((__m128i *)(out + i), _mm_cvtps_ph(_mm_loadu_ps(in + i), 0)); |
| i += 4; |
| } |
| // Inlining "qfloat16::qfloat16(float f)": |
| for (epilog_i = 0; i < len && epilog_i < 3; ++i, ++epilog_i) |
| out[i] = _mm_extract_epi16(_mm_cvtps_ph(_mm_set_ss(in[i]), 0), 0); |
| } |
| |
| QT_FUNCTION_TARGET(F16C) |
| void qFloatFromFloat16_fast(float *out, const quint16 *in, qsizetype len) Q_DECL_NOEXCEPT |
| { |
| qsizetype i = 0; |
| int epilog_i; |
| for (; i < len - 7; i += 8) |
| _mm256_storeu_ps(out + i, _mm256_cvtph_ps(_mm_loadu_si128((const __m128i *)(in + i)))); |
| if (i < len - 3) { |
| _mm_storeu_ps(out + i, _mm_cvtph_ps(_mm_loadl_epi64((const __m128i *)(in + i)))); |
| i += 4; |
| } |
| // Inlining "qfloat16::operator float()": |
| for (epilog_i = 0; i < len && epilog_i < 3; ++i, ++epilog_i) |
| out[i] = _mm_cvtss_f32(_mm_cvtph_ps(_mm_cvtsi32_si128(in[i]))); |
| } |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| QT_END_NAMESPACE |
| #endif |