| // 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. |
| |
| #include <assert.h> |
| #include <math.h> |
| #include <stdint.h> |
| #include <stddef.h> |
| |
| #include <fp16/bitcasts.h> |
| |
| #include <xnnpack/requantization-stubs.h> |
| |
| |
| void xnn_qs8_requantize_fp32__scalar_lrintf( |
| size_t n, |
| const int32_t* input, |
| float scale, |
| int8_t zero_point, |
| int8_t qmin, |
| int8_t qmax, |
| int8_t* output) |
| { |
| assert(n % 4 == 0); |
| assert(scale < 1.0f); |
| assert(scale >= 0x1.0p-32f); |
| |
| const long lmin = (long) ((int32_t) qmin - (int32_t) zero_point); |
| const long lmax = (long) ((int32_t) qmax - (int32_t) zero_point); |
| for (; n != 0; n -= 4) { |
| const int32_t x = input[0]; |
| const int32_t y = input[1]; |
| const int32_t z = input[2]; |
| const int32_t w = input[3]; |
| input += 4; |
| |
| const float x_scaled = (float) x * scale; |
| const float y_scaled = (float) y * scale; |
| const float z_scaled = (float) z * scale; |
| const float w_scaled = (float) w * scale; |
| |
| const long x_rounded = lrintf(x_scaled); |
| const long y_rounded = lrintf(y_scaled); |
| const long z_rounded = lrintf(z_scaled); |
| const long w_rounded = lrintf(w_scaled); |
| |
| const int32_t x_clamped = (int32_t) (x_rounded < lmin ? lmin : x_rounded > lmax ? lmax : x_rounded); |
| const int32_t y_clamped = (int32_t) (y_rounded < lmin ? lmin : y_rounded > lmax ? lmax : y_rounded); |
| const int32_t z_clamped = (int32_t) (z_rounded < lmin ? lmin : z_rounded > lmax ? lmax : z_rounded); |
| const int32_t w_clamped = (int32_t) (w_rounded < lmin ? lmin : w_rounded > lmax ? lmax : w_rounded); |
| |
| const int32_t x_biased = x_clamped + (int32_t) zero_point; |
| const int32_t y_biased = y_clamped + (int32_t) zero_point; |
| const int32_t z_biased = z_clamped + (int32_t) zero_point; |
| const int32_t w_biased = w_clamped + (int32_t) zero_point; |
| |
| output[0] = (int8_t) x_biased; |
| output[1] = (int8_t) y_biased; |
| output[2] = (int8_t) z_biased; |
| output[3] = (int8_t) w_biased; |
| output += 4; |
| } |
| } |