From 4b3fba1850fdf84ba3f9a0c98acf3de672330b34 Mon Sep 17 00:00:00 2001 From: Georgios Pinitas Date: Tue, 4 Jun 2019 17:31:46 +0100 Subject: COMPMID-2372: Add support for QASYMM8 for Tanh -Perform calculations in the floating point domain -Extends checks for Logistic as scale should be 1/256 and offset 0 Change-Id: I90ef4a042f053976936f5d28f8e09b54eec196a2 Signed-off-by: Georgios Pinitas Reviewed-on: https://review.mlplatform.org/c/1287 Tested-by: Arm Jenkins Reviewed-by: Michalis Spyrou Comments-Addressed: Arm Jenkins --- arm_compute/core/utils/helpers/float_ops.h | 98 ++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 arm_compute/core/utils/helpers/float_ops.h (limited to 'arm_compute/core/utils/helpers') diff --git a/arm_compute/core/utils/helpers/float_ops.h b/arm_compute/core/utils/helpers/float_ops.h new file mode 100644 index 0000000000..5012c8ef84 --- /dev/null +++ b/arm_compute/core/utils/helpers/float_ops.h @@ -0,0 +1,98 @@ +/* + * 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 Number of allowed ULPs + * + * @return True if number is close else false + */ +bool is_equal_ulps(float a, float b, int max_allowed_ulps = 0) +{ + RawFloat ra(a); + RawFloat rb(b); + + // Early check for sign + if(ra.sign() != rb.sign()) + { + return (a == b); + } + + // Check ULP distance + const int ulps = std::abs(ra.i32 - rb.i32); + return ulps <= max_allowed_ulps; +} +} // namespace float_ops +} // namespace helpers +} // namespace arm_compute +#endif /* __ARM_COMPUTE_UTILS_HELPERS_FLOAT_OPS_H__ */ -- cgit v1.2.1