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Header optimizations (#1684)

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Shouldn't break anything. I hope.
This commit is contained in:
Ivan
2016-04-27 01:27:24 +03:00
parent da7472fe81
commit aafcf44581
89 changed files with 2370 additions and 2348 deletions
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Utilities/Platform.h
-108
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@@ -88,114 +88,6 @@ inline std::uint64_t cntlz64(std::uint64_t arg)
#endif
}
template<typename T>
struct add_flags_result_t
{
T result;
bool carry;
//bool overflow;
bool zero;
bool sign;
add_flags_result_t() = default;
// Straighforward ADD with flags
add_flags_result_t(T a, T b)
: result(a + b)
, carry(result < a)
//, overflow((result ^ ~(a ^ b)) >> (sizeof(T) * 8 - 1) != 0)
, zero(result == 0)
, sign(result >> (sizeof(T) * 8 - 1) != 0)
{
}
// Straighforward ADC with flags
add_flags_result_t(T a, T b, bool c)
: add_flags_result_t(a, b)
{
add_flags_result_t r(result, c);
result = r.result;
carry |= r.carry;
//overflow |= r.overflow;
zero = r.zero;
sign = r.sign;
}
};
inline add_flags_result_t<std::uint32_t> add32_flags(std::uint32_t a, std::uint32_t b)
{
//add_flags_result_t<std::uint32_t> r;
//r.carry = _addcarry_u32(0, a, b, &r.result) != 0;
//r.zero = r.result == 0;
//r.sign = r.result >> 31;
//return r;
return{ a, b };
}
inline add_flags_result_t<std::uint32_t> add32_flags(std::uint32_t a, std::uint32_t b, bool c)
{
return{ a, b, c };
}
inline add_flags_result_t<std::uint64_t> add64_flags(std::uint64_t a, std::uint64_t b)
{
return{ a, b };
}
inline add_flags_result_t<std::uint64_t> add64_flags(std::uint64_t a, std::uint64_t b, bool c)
{
return{ a, b, c };
}
// Compare 16 packed unsigned bytes (greater than)
inline __m128i sse_cmpgt_epu8(__m128i A, __m128i B)
{
// (A xor 0x80) > (B xor 0x80)
const auto sign = _mm_set1_epi32(0x80808080);
return _mm_cmpgt_epi8(_mm_xor_si128(A, sign), _mm_xor_si128(B, sign));
}
inline __m128i sse_cmpgt_epu16(__m128i A, __m128i B)
{
const auto sign = _mm_set1_epi32(0x80008000);
return _mm_cmpgt_epi16(_mm_xor_si128(A, sign), _mm_xor_si128(B, sign));
}
inline __m128i sse_cmpgt_epu32(__m128i A, __m128i B)
{
const auto sign = _mm_set1_epi32(0x80000000);
return _mm_cmpgt_epi32(_mm_xor_si128(A, sign), _mm_xor_si128(B, sign));
}
inline __m128 sse_exp2_ps(__m128 A)
{
const auto x0 = _mm_max_ps(_mm_min_ps(A, _mm_set1_ps(127.4999961f)), _mm_set1_ps(-127.4999961f));
const auto x1 = _mm_add_ps(x0, _mm_set1_ps(0.5f));
const auto x2 = _mm_sub_epi32(_mm_cvtps_epi32(x1), _mm_and_si128(_mm_castps_si128(_mm_cmpnlt_ps(_mm_setzero_ps(), x1)), _mm_set1_epi32(1)));
const auto x3 = _mm_sub_ps(x0, _mm_cvtepi32_ps(x2));
const auto x4 = _mm_mul_ps(x3, x3);
const auto x5 = _mm_mul_ps(x3, _mm_add_ps(_mm_mul_ps(_mm_add_ps(_mm_mul_ps(x4, _mm_set1_ps(0.023093347705f)), _mm_set1_ps(20.20206567f)), x4), _mm_set1_ps(1513.906801f)));
const auto x6 = _mm_mul_ps(x5, _mm_rcp_ps(_mm_sub_ps(_mm_add_ps(_mm_mul_ps(_mm_set1_ps(233.1842117f), x4), _mm_set1_ps(4368.211667f)), x5)));
return _mm_mul_ps(_mm_add_ps(_mm_add_ps(x6, x6), _mm_set1_ps(1.0f)), _mm_castsi128_ps(_mm_slli_epi32(_mm_add_epi32(x2, _mm_set1_epi32(127)), 23)));
}
inline __m128 sse_log2_ps(__m128 A)
{
const auto _1 = _mm_set1_ps(1.0f);
const auto _c = _mm_set1_ps(1.442695040f);
const auto x0 = _mm_max_ps(A, _mm_castsi128_ps(_mm_set1_epi32(0x00800000)));
const auto x1 = _mm_or_ps(_mm_and_ps(x0, _mm_castsi128_ps(_mm_set1_epi32(0x807fffff))), _1);
const auto x2 = _mm_rcp_ps(_mm_add_ps(x1, _1));
const auto x3 = _mm_mul_ps(_mm_sub_ps(x1, _1), x2);
const auto x4 = _mm_add_ps(x3, x3);
const auto x5 = _mm_mul_ps(x4, x4);
const auto x6 = _mm_add_ps(_mm_mul_ps(_mm_add_ps(_mm_mul_ps(_mm_set1_ps(-0.7895802789f), x5), _mm_set1_ps(16.38666457f)), x5), _mm_set1_ps(-64.1409953f));
const auto x7 = _mm_rcp_ps(_mm_add_ps(_mm_mul_ps(_mm_add_ps(_mm_mul_ps(_mm_set1_ps(-35.67227983f), x5), _mm_set1_ps(312.0937664f)), x5), _mm_set1_ps(-769.6919436f)));
const auto x8 = _mm_cvtepi32_ps(_mm_sub_epi32(_mm_srli_epi32(_mm_castps_si128(x0), 23), _mm_set1_epi32(127)));
return _mm_add_ps(_mm_mul_ps(_mm_mul_ps(_mm_mul_ps(_mm_mul_ps(x5, x6), x7), x4), _c), _mm_add_ps(_mm_mul_ps(x4, _c), x8));
}
// Helper function, used by ""_u16, ""_u32, ""_u64
constexpr std::uint8_t to_u8(char c)
{