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#pragma once
#include <c10/macros/Macros.h>
#include <c10/util/Float8_fnuz_cvt.h>
#include <cstring>
#include <limits>
C10_CLANG_DIAGNOSTIC_PUSH()
#if C10_CLANG_HAS_WARNING("-Wimplicit-int-float-conversion")
C10_CLANG_DIAGNOSTIC_IGNORE("-Wimplicit-int-float-conversion")
#endif
namespace c10 {
/// Constructors
inline C10_HOST_DEVICE Float8_e4m3fnuz::Float8_e4m3fnuz(float value)
: x(detail::fp8e4m3fnuz_from_fp32_value(value)) {}
/// Implicit conversions
inline C10_HOST_DEVICE Float8_e4m3fnuz::operator float() const {
return detail::fp8_fnuz_to_fp32_value<4, 3>(x);
}
/// Special values helper
inline C10_HOST_DEVICE bool Float8_e4m3fnuz::isnan() const {
return x == 0b10000000;
}
/// Arithmetic
inline C10_HOST_DEVICE Float8_e4m3fnuz
operator+(const Float8_e4m3fnuz& a, const Float8_e4m3fnuz& b) {
return static_cast<float>(a) + static_cast<float>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz
operator-(const Float8_e4m3fnuz& a, const Float8_e4m3fnuz& b) {
return static_cast<float>(a) - static_cast<float>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz
operator*(const Float8_e4m3fnuz& a, const Float8_e4m3fnuz& b) {
return static_cast<float>(a) * static_cast<float>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator/(
const Float8_e4m3fnuz& a,
const Float8_e4m3fnuz& b) __ubsan_ignore_float_divide_by_zero__ {
return static_cast<float>(a) / static_cast<float>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator-(const Float8_e4m3fnuz& a) {
return -static_cast<float>(a);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz& operator+=(
Float8_e4m3fnuz& a,
const Float8_e4m3fnuz& b) {
a = a + b;
return a;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz& operator-=(
Float8_e4m3fnuz& a,
const Float8_e4m3fnuz& b) {
a = a - b;
return a;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz& operator*=(
Float8_e4m3fnuz& a,
const Float8_e4m3fnuz& b) {
a = a * b;
return a;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz& operator/=(
Float8_e4m3fnuz& a,
const Float8_e4m3fnuz& b) {
a = a / b;
return a;
}
/// Arithmetic with floats
inline C10_HOST_DEVICE float operator+(Float8_e4m3fnuz a, float b) {
return static_cast<float>(a) + b;
}
inline C10_HOST_DEVICE float operator-(Float8_e4m3fnuz a, float b) {
return static_cast<float>(a) - b;
}
inline C10_HOST_DEVICE float operator*(Float8_e4m3fnuz a, float b) {
return static_cast<float>(a) * b;
}
inline C10_HOST_DEVICE float operator/(Float8_e4m3fnuz a, float b)
__ubsan_ignore_float_divide_by_zero__ {
return static_cast<float>(a) / b;
}
inline C10_HOST_DEVICE float operator+(float a, Float8_e4m3fnuz b) {
return a + static_cast<float>(b);
}
inline C10_HOST_DEVICE float operator-(float a, Float8_e4m3fnuz b) {
return a - static_cast<float>(b);
}
inline C10_HOST_DEVICE float operator*(float a, Float8_e4m3fnuz b) {
return a * static_cast<float>(b);
}
inline C10_HOST_DEVICE float operator/(float a, Float8_e4m3fnuz b)
__ubsan_ignore_float_divide_by_zero__ {
return a / static_cast<float>(b);
}
inline C10_HOST_DEVICE float& operator+=(float& a, const Float8_e4m3fnuz& b) {
return a += static_cast<float>(b);
}
inline C10_HOST_DEVICE float& operator-=(float& a, const Float8_e4m3fnuz& b) {
return a -= static_cast<float>(b);
}
inline C10_HOST_DEVICE float& operator*=(float& a, const Float8_e4m3fnuz& b) {
return a *= static_cast<float>(b);
}
inline C10_HOST_DEVICE float& operator/=(float& a, const Float8_e4m3fnuz& b) {
return a /= static_cast<float>(b);
}
/// Arithmetic with doubles
inline C10_HOST_DEVICE double operator+(Float8_e4m3fnuz a, double b) {
return static_cast<double>(a) + b;
}
inline C10_HOST_DEVICE double operator-(Float8_e4m3fnuz a, double b) {
return static_cast<double>(a) - b;
}
inline C10_HOST_DEVICE double operator*(Float8_e4m3fnuz a, double b) {
return static_cast<double>(a) * b;
}
inline C10_HOST_DEVICE double operator/(Float8_e4m3fnuz a, double b)
__ubsan_ignore_float_divide_by_zero__ {
return static_cast<double>(a) / b;
}
inline C10_HOST_DEVICE double operator+(double a, Float8_e4m3fnuz b) {
return a + static_cast<double>(b);
}
inline C10_HOST_DEVICE double operator-(double a, Float8_e4m3fnuz b) {
return a - static_cast<double>(b);
}
inline C10_HOST_DEVICE double operator*(double a, Float8_e4m3fnuz b) {
return a * static_cast<double>(b);
}
inline C10_HOST_DEVICE double operator/(double a, Float8_e4m3fnuz b)
__ubsan_ignore_float_divide_by_zero__ {
return a / static_cast<double>(b);
}
/// Arithmetic with ints
inline C10_HOST_DEVICE Float8_e4m3fnuz operator+(Float8_e4m3fnuz a, int b) {
return a + static_cast<Float8_e4m3fnuz>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator-(Float8_e4m3fnuz a, int b) {
return a - static_cast<Float8_e4m3fnuz>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator*(Float8_e4m3fnuz a, int b) {
return a * static_cast<Float8_e4m3fnuz>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator/(Float8_e4m3fnuz a, int b) {
return a / static_cast<Float8_e4m3fnuz>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator+(int a, Float8_e4m3fnuz b) {
return static_cast<Float8_e4m3fnuz>(a) + b;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator-(int a, Float8_e4m3fnuz b) {
return static_cast<Float8_e4m3fnuz>(a) - b;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator*(int a, Float8_e4m3fnuz b) {
return static_cast<Float8_e4m3fnuz>(a) * b;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator/(int a, Float8_e4m3fnuz b) {
return static_cast<Float8_e4m3fnuz>(a) / b;
}
//// Arithmetic with int64_t
inline C10_HOST_DEVICE Float8_e4m3fnuz operator+(Float8_e4m3fnuz a, int64_t b) {
return a + static_cast<Float8_e4m3fnuz>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator-(Float8_e4m3fnuz a, int64_t b) {
return a - static_cast<Float8_e4m3fnuz>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator*(Float8_e4m3fnuz a, int64_t b) {
return a * static_cast<Float8_e4m3fnuz>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator/(Float8_e4m3fnuz a, int64_t b) {
return a / static_cast<Float8_e4m3fnuz>(b);
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator+(int64_t a, Float8_e4m3fnuz b) {
return static_cast<Float8_e4m3fnuz>(a) + b;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator-(int64_t a, Float8_e4m3fnuz b) {
return static_cast<Float8_e4m3fnuz>(a) - b;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator*(int64_t a, Float8_e4m3fnuz b) {
return static_cast<Float8_e4m3fnuz>(a) * b;
}
inline C10_HOST_DEVICE Float8_e4m3fnuz operator/(int64_t a, Float8_e4m3fnuz b) {
return static_cast<Float8_e4m3fnuz>(a) / b;
}
/// NOTE: we do not define comparisons directly and instead rely on the implicit
/// conversion from c10::Float8_e4m3fnuz to float.
} // namespace c10
namespace std {
template <>
class numeric_limits<c10::Float8_e4m3fnuz> {
public:
static constexpr bool is_specialized = true;
static constexpr bool is_signed = true;
static constexpr bool is_integer = false;
static constexpr bool is_exact = false;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = true;
static constexpr bool has_signaling_NaN = false;
static constexpr auto has_denorm = true;
static constexpr auto has_denorm_loss = true;
static constexpr auto round_style = numeric_limits<float>::round_style;
static constexpr bool is_iec559 = false;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = false;
static constexpr int digits = 4;
static constexpr int digits10 = 0;
static constexpr int max_digits10 = 3;
static constexpr int radix = 2;
static constexpr int min_exponent = -6;
static constexpr int min_exponent10 = -1;
static constexpr int max_exponent = 8;
static constexpr int max_exponent10 = 2;
static constexpr auto traps = numeric_limits<float>::traps;
static constexpr auto tinyness_before = false;
static constexpr c10::Float8_e4m3fnuz min() {
return c10::Float8_e4m3fnuz(0x08, c10::Float8_e4m3fnuz::from_bits());
}
static constexpr c10::Float8_e4m3fnuz lowest() {
return c10::Float8_e4m3fnuz(0xFF, c10::Float8_e4m3fnuz::from_bits());
}
static constexpr c10::Float8_e4m3fnuz max() {
return c10::Float8_e4m3fnuz(0x7F, c10::Float8_e4m3fnuz::from_bits());
}
static constexpr c10::Float8_e4m3fnuz epsilon() {
return c10::Float8_e4m3fnuz(0x28, c10::Float8_e4m3fnuz::from_bits());
}
static constexpr c10::Float8_e4m3fnuz round_error() {
return c10::Float8_e4m3fnuz(0x38, c10::Float8_e4m3fnuz::from_bits());
}
static constexpr c10::Float8_e4m3fnuz infinity() {
// NaN (no infinities)
return c10::Float8_e4m3fnuz(0x80, c10::Float8_e4m3fnuz::from_bits());
}
static constexpr c10::Float8_e4m3fnuz quiet_NaN() {
return c10::Float8_e4m3fnuz(0x80, c10::Float8_e4m3fnuz::from_bits());
}
static constexpr c10::Float8_e4m3fnuz denorm_min() {
return c10::Float8_e4m3fnuz(0x01, c10::Float8_e4m3fnuz::from_bits());
}
};
} // namespace std
C10_CLANG_DIAGNOSTIC_POP()
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