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#pragma once
#include <c10/util/Exception.h>
#include <cstdint>
#include <string>
namespace c10 {
/**
* QScheme is an enum that specifies the type of quantization. This has a one
* to one correspondence with Quantizer
* Please refer to ATen/quantized/Quantizer.h to see the Quantizers classes.
* Keep this file in sync with torch/nn/_qscheme.py
*/
enum class QScheme : uint8_t {
PER_TENSOR_AFFINE = 0,
PER_CHANNEL_AFFINE = 1,
PER_TENSOR_SYMMETRIC = 2,
PER_CHANNEL_SYMMETRIC = 3,
PER_CHANNEL_AFFINE_FLOAT_QPARAMS = 4,
COMPILE_TIME_NUM_QSCHEMES = 5,
};
constexpr auto kPerTensorAffine = QScheme::PER_TENSOR_AFFINE;
constexpr auto kPerChannelAffine = QScheme::PER_CHANNEL_AFFINE;
constexpr auto kPerTensorSymmetric = QScheme::PER_TENSOR_SYMMETRIC;
constexpr auto kPerChannelSymmetric = QScheme::PER_CHANNEL_SYMMETRIC;
constexpr auto kPerChannelAffineFloatQParams =
QScheme::PER_CHANNEL_AFFINE_FLOAT_QPARAMS;
constexpr int COMPILE_TIME_NUM_QSCHEMES =
static_cast<int>(QScheme::COMPILE_TIME_NUM_QSCHEMES);
inline std::string toString(QScheme qscheme) {
switch (qscheme) {
case kPerTensorAffine:
return "per_tensor_affine";
case kPerChannelAffine:
return "per_channel_affine";
case kPerTensorSymmetric:
return "per_tensor_symmetric";
case kPerChannelSymmetric:
return "per_channel_symmetric";
case kPerChannelAffineFloatQParams:
return "per_channel_affine_float_qparams";
default:
TORCH_CHECK(false, "Unrecognized qscheme: ", static_cast<int>(qscheme));
}
}
} // namespace c10
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