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-rw-r--r--arm_compute/core/utils/helpers/float_ops.h116
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diff --git a/arm_compute/core/utils/helpers/float_ops.h b/arm_compute/core/utils/helpers/float_ops.h
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-/*
- * Copyright (c) 2019 ARM Limited.
- *
- * SPDX-License-Identifier: MIT
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-#ifndef ARM_COMPUTE_UTILS_HELPERS_FLOAT_OPS_H
-#define ARM_COMPUTE_UTILS_HELPERS_FLOAT_OPS_H
-
-namespace arm_compute
-{
-namespace helpers
-{
-namespace float_ops
-{
-union RawFloat
-{
- /** Constructor
- *
- * @param[in] val Floating-point value
- */
- explicit RawFloat(float val)
- : f32(val)
- {
- }
- /** Extract sign of floating point number
- *
- * @return Sign of floating point number
- */
- int32_t sign() const
- {
- return i32 >> 31;
- }
- /** Extract exponent of floating point number
- *
- * @return Exponent of floating point number
- */
- int32_t exponent() const
- {
- return (i32 >> 23) & 0xFF;
- }
- /** Extract mantissa of floating point number
- *
- * @return Mantissa of floating point number
- */
- int32_t mantissa() const
- {
- return i32 & 0x007FFFFF;
- }
-
- int32_t i32;
- float f32;
-};
-
-/** Checks if two floating point numbers are equal given an allowed number of ULPs
- *
- * @param[in] a First number to compare
- * @param[in] b Second number to compare
- * @param[in] max_allowed_ulps (Optional) Number of allowed ULPs
- *
- * @return True if number is close else false
- */
-inline bool is_equal_ulps(float a, float b, int max_allowed_ulps = 0)
-{
- RawFloat ra(a);
- RawFloat rb(b);
-
- // Check ULP distance
- const int ulps = std::abs(ra.i32 - rb.i32);
- return ulps <= max_allowed_ulps;
-}
-
-/** Checks if the input floating point number is 1.0f checking if the difference is within a range defined with epsilon
- *
- * @param[in] a Input floating point number
- * @param[in] epsilon (Optional) Epsilon used to define the error bounds
- *
- * @return True if number is close to 1.0f
- */
-inline bool is_one(float a, float epsilon = 0.00001f)
-{
- return std::abs(1.0f - a) <= epsilon;
-}
-
-/** Checks if the input floating point number is 0.0f checking if the difference is within a range defined with epsilon
- *
- * @param[in] a Input floating point number
- * @param[in] epsilon (Optional) Epsilon used to define the error bounds
- *
- * @return True if number is close to 0.0f
- */
-inline bool is_zero(float a, float epsilon = 0.00001f)
-{
- return std::abs(0.0f - a) <= epsilon;
-}
-} // namespace float_ops
-} // namespace helpers
-} // namespace arm_compute
-#endif /* ARM_COMPUTE_UTILS_HELPERS_FLOAT_OPS_H */