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Update AVX half packets, disable test.

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The AVX half implementation is incomplete, causing the `packetmath_13` test
to fail.  This disables the test.

Also refactored the existing AVX implementation to use `bit_cast`
instead of direct access to `.x`.
This commit is contained in:
Antonio Sanchez 2020-11-19 15:44:19 -08:00
parent fd1dcb6b45
commit 4cf01d2cf5
2 changed files with 57 additions and 34 deletions
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81
Eigen/src/Core/arch/AVX/PacketMath.h
View File

@ -870,14 +870,16 @@ template<> EIGEN_STRONG_INLINE Packet4d pblend(const Selector<4>& ifPacket, cons
}
// Packet math for Eigen::half
// TODO(cantonios): add missing packet ops
// - pabs, pmin, pmax, plset, pround, print, pceil, pfloor, pcmp_lt, pcmp_le, pcmp_lt_or_nan
template<> struct unpacket_traits<Packet8h> { typedef Eigen::half type; enum {size=8, alignment=Aligned16, vectorizable=true, masked_load_available=false, masked_store_available=false}; typedef Packet8h half; };
template<> EIGEN_STRONG_INLINE Packet8h pset1<Packet8h>(const Eigen::half& from) {
return _mm_set1_epi16(from.x);
return _mm_set1_epi16(numext::bit_cast<numext::uint16_t>(from));
}
template<> EIGEN_STRONG_INLINE Eigen::half pfirst<Packet8h>(const Packet8h& from) {
return half_impl::raw_uint16_to_half(static_cast<unsigned short>(_mm_extract_epi16(from, 0)));
return numext::bit_cast<Eigen::half>(static_cast<numext::uint16_t>(_mm_extract_epi16(from, 0)));
}
template<> EIGEN_STRONG_INLINE Packet8h pload<Packet8h>(const Eigen::half* from) {
@ -898,17 +900,17 @@ template<> EIGEN_STRONG_INLINE void pstoreu<Eigen::half>(Eigen::half* to, const
template<> EIGEN_STRONG_INLINE Packet8h
ploaddup<Packet8h>(const Eigen::half* from) {
unsigned short a = from[0].x;
unsigned short b = from[1].x;
unsigned short c = from[2].x;
unsigned short d = from[3].x;
const numext::uint16_t a = numext::bit_cast<numext::uint16_t>(from[0]);
const numext::uint16_t b = numext::bit_cast<numext::uint16_t>(from[1]);
const numext::uint16_t c = numext::bit_cast<numext::uint16_t>(from[2]);
const numext::uint16_t d = numext::bit_cast<numext::uint16_t>(from[3]);
return _mm_set_epi16(d, d, c, c, b, b, a, a);
}
template<> EIGEN_STRONG_INLINE Packet8h
ploadquad<Packet8h>(const Eigen::half* from) {
unsigned short a = from[0].x;
unsigned short b = from[1].x;
const numext::uint16_t a = numext::bit_cast<numext::uint16_t>(from[0]);
const numext::uint16_t b = numext::bit_cast<numext::uint16_t>(from[1]);
return _mm_set_epi16(b, b, b, b, a, a, a, a);
}
@ -937,16 +939,15 @@ EIGEN_STRONG_INLINE Packet8h float2half(const Packet8f& a) {
#else
EIGEN_ALIGN32 float aux[8];
pstore(aux, a);
Eigen::half h0(aux[0]);
Eigen::half h1(aux[1]);
Eigen::half h2(aux[2]);
Eigen::half h3(aux[3]);
Eigen::half h4(aux[4]);
Eigen::half h5(aux[5]);
Eigen::half h6(aux[6]);
Eigen::half h7(aux[7]);
return _mm_set_epi16(h7.x, h6.x, h5.x, h4.x, h3.x, h2.x, h1.x, h0.x);
const numext::uint16_t s0 = numext::bit_cast<numext::uint16_t>(Eigen::half(aux[0]));
const numext::uint16_t s1 = numext::bit_cast<numext::uint16_t>(Eigen::half(aux[1]));
const numext::uint16_t s2 = numext::bit_cast<numext::uint16_t>(Eigen::half(aux[2]));
const numext::uint16_t s3 = numext::bit_cast<numext::uint16_t>(Eigen::half(aux[3]));
const numext::uint16_t s4 = numext::bit_cast<numext::uint16_t>(Eigen::half(aux[4]));
const numext::uint16_t s5 = numext::bit_cast<numext::uint16_t>(Eigen::half(aux[5]));
const numext::uint16_t s6 = numext::bit_cast<numext::uint16_t>(Eigen::half(aux[6]));
const numext::uint16_t s7 = numext::bit_cast<numext::uint16_t>(Eigen::half(aux[7]));
return _mm_set_epi16(s7, s6, s5, s4, s3, s2, s1, s0);
#endif
}
@ -985,7 +986,7 @@ template<> EIGEN_STRONG_INLINE Packet8h pcmp_eq(const Packet8h& a,const Packet8h
template<> EIGEN_STRONG_INLINE Packet8h pconj(const Packet8h& a) { return a; }
template<> EIGEN_STRONG_INLINE Packet8h pnegate(const Packet8h& a) {
Packet8h sign_mask = _mm_set1_epi16(static_cast<unsigned short>(0x8000));
Packet8h sign_mask = _mm_set1_epi16(static_cast<numext::uint16_t>(0x8000));
return _mm_xor_si128(a, sign_mask);
}
@ -1019,7 +1020,15 @@ template<> EIGEN_STRONG_INLINE Packet8h pdiv<Packet8h>(const Packet8h& a, const
template<> EIGEN_STRONG_INLINE Packet8h pgather<Eigen::half, Packet8h>(const Eigen::half* from, Index stride)
{
return _mm_set_epi16(from[7*stride].x, from[6*stride].x, from[5*stride].x, from[4*stride].x, from[3*stride].x, from[2*stride].x, from[1*stride].x, from[0*stride].x);
const numext::uint16_t s0 = numext::bit_cast<numext::uint16_t>(from[0*stride]);
const numext::uint16_t s1 = numext::bit_cast<numext::uint16_t>(from[1*stride]);
const numext::uint16_t s2 = numext::bit_cast<numext::uint16_t>(from[2*stride]);
const numext::uint16_t s3 = numext::bit_cast<numext::uint16_t>(from[3*stride]);
const numext::uint16_t s4 = numext::bit_cast<numext::uint16_t>(from[4*stride]);
const numext::uint16_t s5 = numext::bit_cast<numext::uint16_t>(from[5*stride]);
const numext::uint16_t s6 = numext::bit_cast<numext::uint16_t>(from[6*stride]);
const numext::uint16_t s7 = numext::bit_cast<numext::uint16_t>(from[7*stride]);
return _mm_set_epi16(s7, s6, s5, s4, s3, s2, s1, s0);
}
template<> EIGEN_STRONG_INLINE void pscatter<Eigen::half, Packet8h>(Eigen::half* to, const Packet8h& from, Index stride)
@ -1178,7 +1187,7 @@ EIGEN_STRONG_INLINE Packet8bf F32ToBf16(const Packet8f& a) {
__m256 mask = _mm256_cmp_ps(flush, flush, _CMP_ORD_Q);
__m256i nan = _mm256_set1_epi32(0x7fc0);
t = _mm256_blendv_epi8(nan, t, _mm256_castps_si256(mask));
// output.value = static_cast<uint16_t>(input);
// output = numext::bit_cast<uint16_t>(input);
return _mm_packus_epi32(_mm256_extractf128_si256(t, 0),
_mm256_extractf128_si256(t, 1));
#else
@ -1202,17 +1211,17 @@ EIGEN_STRONG_INLINE Packet8bf F32ToBf16(const Packet8f& a) {
__m128i nan = _mm_set1_epi32(0x7fc0);
lo = _mm_blendv_epi8(nan, lo, _mm_castps_si128(_mm256_castps256_ps128(mask)));
hi = _mm_blendv_epi8(nan, hi, _mm_castps_si128(_mm256_extractf128_ps(mask, 1)));
// output.value = static_cast<uint16_t>(input);
// output = numext::bit_cast<uint16_t>(input);
return _mm_packus_epi32(lo, hi);
#endif
}
template<> EIGEN_STRONG_INLINE Packet8bf pset1<Packet8bf>(const bfloat16& from) {
return _mm_set1_epi16(from.value);
return _mm_set1_epi16(numext::bit_cast<numext::uint16_t>(from));
}
template<> EIGEN_STRONG_INLINE bfloat16 pfirst<Packet8bf>(const Packet8bf& from) {
return bfloat16_impl::raw_uint16_to_bfloat16(static_cast<unsigned short>(_mm_extract_epi16(from, 0)));
return numext::bit_cast<bfloat16>(static_cast<numext::uint16_t>(_mm_extract_epi16(from, 0)));
}
template<> EIGEN_STRONG_INLINE Packet8bf pload<Packet8bf>(const bfloat16* from) {
@ -1233,17 +1242,17 @@ template<> EIGEN_STRONG_INLINE void pstoreu<bfloat16>(bfloat16* to, const Packet
template<> EIGEN_STRONG_INLINE Packet8bf
ploaddup<Packet8bf>(const bfloat16* from) {
unsigned short a = from[0].value;
unsigned short b = from[1].value;
unsigned short c = from[2].value;
unsigned short d = from[3].value;
const numext::uint16_t a = numext::bit_cast<numext::uint16_t>(from[0]);
const numext::uint16_t b = numext::bit_cast<numext::uint16_t>(from[1]);
const numext::uint16_t c = numext::bit_cast<numext::uint16_t>(from[2]);
const numext::uint16_t d = numext::bit_cast<numext::uint16_t>(from[3]);
return _mm_set_epi16(d, d, c, c, b, b, a, a);
}
template<> EIGEN_STRONG_INLINE Packet8bf
ploadquad<Packet8bf>(const bfloat16* from) {
unsigned short a = from[0].value;
unsigned short b = from[1].value;
const numext::uint16_t a = numext::bit_cast<numext::uint16_t>(from[0]);
const numext::uint16_t b = numext::bit_cast<numext::uint16_t>(from[1]);
return _mm_set_epi16(b, b, b, b, a, a, a, a);
}
@ -1326,7 +1335,7 @@ template<> EIGEN_STRONG_INLINE Packet8bf pcmp_lt_or_nan(const Packet8bf& a,const
template<> EIGEN_STRONG_INLINE Packet8bf pconj(const Packet8bf& a) { return a; }
template<> EIGEN_STRONG_INLINE Packet8bf pnegate(const Packet8bf& a) {
Packet8bf sign_mask = _mm_set1_epi16(static_cast<unsigned short>(0x8000));
Packet8bf sign_mask = _mm_set1_epi16(static_cast<numext::uint16_t>(0x8000));
return _mm_xor_si128(a, sign_mask);
}
@ -1349,7 +1358,15 @@ template<> EIGEN_STRONG_INLINE Packet8bf pdiv<Packet8bf>(const Packet8bf& a, con
template<> EIGEN_STRONG_INLINE Packet8bf pgather<bfloat16, Packet8bf>(const bfloat16* from, Index stride)
{
return _mm_set_epi16(from[7*stride].value, from[6*stride].value, from[5*stride].value, from[4*stride].value, from[3*stride].value, from[2*stride].value, from[1*stride].value, from[0*stride].value);
const numext::uint16_t s0 = numext::bit_cast<numext::uint16_t>(from[0*stride]);
const numext::uint16_t s1 = numext::bit_cast<numext::uint16_t>(from[1*stride]);
const numext::uint16_t s2 = numext::bit_cast<numext::uint16_t>(from[2*stride]);
const numext::uint16_t s3 = numext::bit_cast<numext::uint16_t>(from[3*stride]);
const numext::uint16_t s4 = numext::bit_cast<numext::uint16_t>(from[4*stride]);
const numext::uint16_t s5 = numext::bit_cast<numext::uint16_t>(from[5*stride]);
const numext::uint16_t s6 = numext::bit_cast<numext::uint16_t>(from[6*stride]);
const numext::uint16_t s7 = numext::bit_cast<numext::uint16_t>(from[7*stride]);
return _mm_set_epi16(s7, s6, s5, s4, s3, s2, s1, s0);
}
template<> EIGEN_STRONG_INLINE void pscatter<bfloat16, Packet8bf>(bfloat16* to, const Packet8bf& from, Index stride)

10
test/packetmath.cpp
View File

@ -1001,8 +1001,9 @@ void packetmath_scatter_gather() {
int stride = internal::random<int>(1, 20);
EIGEN_ALIGN_MAX Scalar buffer[PacketSize * 20];
memset(buffer, 0, 20 * PacketSize * sizeof(Scalar));
// Buffer of zeros.
EIGEN_ALIGN_MAX Scalar buffer[PacketSize * 20] = {};
Packet packet = internal::pload<Packet>(data1);
internal::pscatter<Scalar, Packet>(buffer, packet, stride);
@ -1073,7 +1074,12 @@ EIGEN_DECLARE_TEST(packetmath) {
CALL_SUBTEST_10(test::runner<uint64_t>::run());
CALL_SUBTEST_11(test::runner<std::complex<float> >::run());
CALL_SUBTEST_12(test::runner<std::complex<double> >::run());
#if defined(EIGEN_VECTORIZE_AVX)
// AVX half packets not fully implemented.
CALL_SUBTEST_13((packetmath<half, internal::packet_traits<half>::type>()));
#else
CALL_SUBTEST_13(test::runner<half>::run());
#endif
CALL_SUBTEST_14((packetmath<bool, internal::packet_traits<bool>::type>()));
CALL_SUBTEST_15(test::runner<bfloat16>::run());
g_first_pass = false;