1/*
2 * Copyright (c) 2014 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23#include <clc/clc.h>
24
25_CLC_OVERLOAD _CLC_DEF float length(float p) {
26  return fabs(p);
27}
28
29#define V_FLENGTH(p)                     \
30  float l2 = dot(p, p);                  \
31                                         \
32  if (l2 < FLT_MIN) {                    \
33    p *= 0x1.0p+86F;                     \
34    return sqrt(dot(p, p)) * 0x1.0p-86F; \
35  } else if (l2 == INFINITY) {           \
36    p *= 0x1.0p-65F;                     \
37    return sqrt(dot(p, p)) * 0x1.0p+65F; \
38  }                                      \
39                                         \
40  return sqrt(l2);
41
42_CLC_OVERLOAD _CLC_DEF float length(float2 p) {
43  V_FLENGTH(p);
44}
45
46_CLC_OVERLOAD _CLC_DEF float length(float3 p) {
47  V_FLENGTH(p);
48}
49
50_CLC_OVERLOAD _CLC_DEF float length(float4 p) {
51  V_FLENGTH(p);
52}
53
54#ifdef cl_khr_fp64
55#pragma OPENCL EXTENSION cl_khr_fp64 : enable
56
57_CLC_OVERLOAD _CLC_DEF double length(double p){
58  return fabs(p);
59}
60
61#define V_DLENGTH(p)                       \
62  double l2 = dot(p, p);                   \
63                                           \
64  if (l2 < DBL_MIN) {                      \
65      p *= 0x1.0p+563;                     \
66      return sqrt(dot(p, p)) * 0x1.0p-563; \
67  } else if (l2 == INFINITY) {             \
68      p *= 0x1.0p-513;                     \
69      return sqrt(dot(p, p)) * 0x1.0p+513; \
70  }                                        \
71                                           \
72  return sqrt(l2);
73
74_CLC_OVERLOAD _CLC_DEF double length(double2 p) {
75  V_DLENGTH(p);
76}
77
78_CLC_OVERLOAD _CLC_DEF double length(double3 p) {
79  V_DLENGTH(p);
80}
81
82_CLC_OVERLOAD _CLC_DEF double length(double4 p) {
83  V_DLENGTH(p);
84}
85
86#endif
87
88#ifdef cl_khr_fp16
89#pragma OPENCL EXTENSION cl_khr_fp16 : enable
90
91_CLC_OVERLOAD _CLC_DEF half length(half p){
92  return fabs(p);
93}
94
95// Only available in CLC1.2
96#ifndef HALF_MIN
97#define HALF_MIN   0x1.0p-14h
98#endif
99
100#define V_HLENGTH(p)                       \
101  half l2 = dot(p, p);                     \
102                                           \
103  if (l2 < HALF_MIN) {                     \
104      p *= 0x1.0p+12h;                     \
105      return sqrt(dot(p, p)) * 0x1.0p-12h; \
106  } else if (l2 == INFINITY) {             \
107      p *= 0x1.0p-7h;                      \
108      return sqrt(dot(p, p)) * 0x1.0p+7h;  \
109  }                                        \
110                                           \
111  return sqrt(l2);
112
113_CLC_OVERLOAD _CLC_DEF half length(half2 p) {
114  V_HLENGTH(p);
115}
116
117_CLC_OVERLOAD _CLC_DEF half length(half3 p) {
118  V_HLENGTH(p);
119}
120
121_CLC_OVERLOAD _CLC_DEF half length(half4 p) {
122  V_HLENGTH(p);
123}
124
125#endif
126