| // Copyright (c) Facebook, Inc. and its affiliates. |
| // All rights reserved. |
| // |
| // Copyright 2019 Google LLC |
| // |
| // This source code is licensed under the BSD-style license found in the |
| // LICENSE file in the root directory of this source tree. |
| |
| #pragma once |
| |
| #if defined(__cplusplus) && (__cplusplus >= 201103L) |
| #include <climits> |
| #include <cstdint> |
| #include <cstdbool> |
| #include <cassert> |
| #else |
| #include <limits.h> |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include <assert.h> |
| #endif |
| |
| #include <fp16.h> |
| |
| #include <xnnpack/common.h> |
| |
| |
| #if defined(__clang__) |
| #if __clang_major__ == 3 && __clang_minor__ >= 7 || __clang_major__ > 3 |
| #define XNN_IGNORE_SHIFT_BASE_UB __attribute__((__no_sanitize__("shift-base"))) |
| #else |
| #define XNN_IGNORE_SHIFT_BASE_UB |
| #endif |
| #elif defined(__GNUC__) |
| #if __GNUC__ >= 8 |
| #define XNN_IGNORE_SHIFT_BASE_UB __attribute__((__no_sanitize__("shift-base"))) |
| #elif __GNUC__ == 4 && __GNUC_MINOR__ >= 9 || __GNUC__ > 4 |
| // 4.9 <= gcc < 8 support ubsan, but doesn't support no_sanitize attribute |
| #define XNN_IGNORE_SHIFT_BASE_UB |
| #ifndef XNN_USE_SHIFT_BASE_UB_WORKAROUND |
| #define XNN_USE_SHIFT_BASE_UB_WORKAROUND 1 |
| #endif |
| #else |
| #define XNN_IGNORE_SHIFT_BASE_UB |
| #endif |
| #else |
| #define XNN_IGNORE_SHIFT_BASE_UB |
| #endif |
| |
| XNN_IGNORE_SHIFT_BASE_UB |
| inline static int32_t asr_s32(int32_t x, uint32_t n) { |
| #ifdef XNN_USE_SHIFT_BASE_UB_WORKAROUND |
| #if XNN_ARCH_X86_64 || XNN_ARCH_ARM64 |
| return (int32_t) ((uint64_t) (int64_t) x >> n); |
| #else |
| return x >= 0 ? x >> n : ~(~x >> n); |
| #endif |
| #else |
| return x >> n; |
| #endif |
| } |
| |
| XNN_IGNORE_SHIFT_BASE_UB |
| inline static int64_t asr_s64(int64_t x, uint32_t n) { |
| #ifdef XNN_USE_SHIFT_BASE_UB_WORKAROUND |
| return x >= 0 ? x >> n : ~(~x >> n); |
| #else |
| return x >> n; |
| #endif |
| } |