diff options
Diffstat (limited to 'tests/validation/reference/UtilsQuantizedAsymm.h')
| -rw-r--r-- | tests/validation/reference/UtilsQuantizedAsymm.h | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/tests/validation/reference/UtilsQuantizedAsymm.h b/tests/validation/reference/UtilsQuantizedAsymm.h index 444696c93a..e5ecc66545 100644 --- a/tests/validation/reference/UtilsQuantizedAsymm.h +++ b/tests/validation/reference/UtilsQuantizedAsymm.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2017-2019 ARM Limited. + * Copyright (c) 2017-2021 Arm Limited. * * SPDX-License-Identifier: MIT * @@ -32,6 +32,22 @@ namespace test { namespace validation { +namespace +{ +#if __clang__ +// This has been tested on clang 7.0.2 (__clang_major__ == 7 && __clang_minor__ == 0 && __clang_patchlevel__ == 2) +inline int64_t to_int64(int32_t val) +{ + return static_cast<int64_t>(val) | ((val < 0) ? (((1ll << 32) - 1) << 32) : 0); +} +#else // __clang__ +inline int64_t to_int64(int32_t val) +{ + return static_cast<int64_t>(val); +} +#endif // __clang__ +} // namespace + /** Rounded to nearest division by a power-of-two. */ inline int32_t asymm_rounding_divide_by_pow2(int32_t x, int exponent) { @@ -40,15 +56,15 @@ inline int32_t asymm_rounding_divide_by_pow2(int32_t x, int exponent) return (x >> exponent) + ((x & mask) > threshold ? 1 : 0); } -/** Multiplication of two integers. The same as ARMv7 NEON VQRDMULH instruction. */ +/** Multiplication of two integers. The same as ARMv7 Arm® Neon™ VQRDMULH instruction. */ inline int32_t asymm_int_mult(int32_t a, int32_t b) { - bool overflow = a == b && a == std::numeric_limits<int32_t>::min(); - int64_t a_64(a); - int64_t b_64(b); - int64_t ab_64 = a_64 * b_64; - int32_t nudge = ab_64 >= 0 ? (1 << 30) : (1 - (1 << 30)); - int32_t ab_x2_high32 = static_cast<int32_t>((ab_64 + nudge) / (1ll << 31)); + const bool overflow = a == b && a == std::numeric_limits<int32_t>::min(); + const int64_t a_64 = to_int64(a); + const int64_t b_64 = to_int64(b); + const int64_t ab_64 = a_64 * b_64; + const int32_t nudge = ab_64 >= 0 ? (1 << 30) : (1 - (1 << 30)); + const int32_t ab_x2_high32 = static_cast<int32_t>((ab_64 + nudge) / (1ll << 31)); return overflow ? std::numeric_limits<int32_t>::max() : ab_x2_high32; } |