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1 /* | 1 /* |
2 * Copyright 2012 The Android Open Source Project | 2 * Copyright 2012 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkUtilsArm_DEFINED | 8 #ifndef SkUtilsArm_DEFINED |
9 #define SkUtilsArm_DEFINED | 9 #define SkUtilsArm_DEFINED |
10 | 10 |
11 #include "SkCpu.h" | |
12 #include "SkUtils.h" | 11 #include "SkUtils.h" |
13 | 12 |
14 // Define SK_ARM_NEON_MODE to one of the following values | 13 // Define SK_ARM_NEON_MODE to one of the following values |
15 // corresponding respectively to: | 14 // corresponding respectively to: |
16 // - No ARM Neon support at all (not targetting ARMv7-A, or don't have NEON) | 15 // - No ARM Neon support at all (not targetting ARMv7-A, or don't have NEON) |
17 // - Full ARM Neon support (i.e. assume the CPU always supports it) | 16 // - Full ARM Neon support (i.e. assume the CPU always supports it) |
18 // - Optional ARM Neon support (i.e. probe CPU at runtime) | 17 // - Optional ARM Neon support (i.e. probe CPU at runtime) |
19 // | 18 // |
20 #define SK_ARM_NEON_MODE_NONE 0 | 19 #define SK_ARM_NEON_MODE_NONE 0 |
21 #define SK_ARM_NEON_MODE_ALWAYS 1 | 20 #define SK_ARM_NEON_MODE_ALWAYS 1 |
22 #define SK_ARM_NEON_MODE_DYNAMIC 2 | 21 #define SK_ARM_NEON_MODE_DYNAMIC 2 |
23 | 22 |
24 #if defined(SK_ARM_HAS_OPTIONAL_NEON) | 23 #if defined(SK_ARM_HAS_OPTIONAL_NEON) |
25 # define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_DYNAMIC | 24 # define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_DYNAMIC |
26 #elif defined(SK_ARM_HAS_NEON) | 25 #elif defined(SK_ARM_HAS_NEON) |
27 # define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_ALWAYS | 26 # define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_ALWAYS |
28 #else | 27 #else |
29 # define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_NONE | 28 # define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_NONE |
30 #endif | 29 #endif |
31 | 30 |
32 // Convenience test macros, always defined as 0 or 1 | 31 // Convenience test macros, always defined as 0 or 1 |
33 #define SK_ARM_NEON_IS_NONE (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_NONE) | 32 #define SK_ARM_NEON_IS_NONE (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_NONE) |
34 #define SK_ARM_NEON_IS_ALWAYS (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_ALWAYS) | 33 #define SK_ARM_NEON_IS_ALWAYS (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_ALWAYS) |
35 #define SK_ARM_NEON_IS_DYNAMIC (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_DYNAMIC) | 34 #define SK_ARM_NEON_IS_DYNAMIC (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_DYNAMIC) |
36 | 35 |
37 // The sk_cpu_arm_has_neon() function returns true iff the target device | 36 // The sk_cpu_arm_has_neon() function returns true iff the target device |
38 // is ARMv7-A and supports Neon instructions. In DYNAMIC mode, this actually | 37 // is ARMv7-A and supports Neon instructions. In DYNAMIC mode, this actually |
39 // probes the CPU at runtime (and caches the result). | 38 // probes the CPU at runtime (and caches the result). |
40 | 39 |
| 40 #if SK_ARM_NEON_IS_NONE |
41 static inline bool sk_cpu_arm_has_neon(void) { | 41 static inline bool sk_cpu_arm_has_neon(void) { |
42 #if SK_ARM_NEON_IS_NONE | |
43 return false; | 42 return false; |
44 #else | 43 } |
45 return SkCpu::Supports(SkCpu::NEON); | 44 #elif SK_ARM_NEON_IS_ALWAYS |
| 45 static inline bool sk_cpu_arm_has_neon(void) { |
| 46 return true; |
| 47 } |
| 48 #else // SK_ARM_NEON_IS_DYNAMIC |
| 49 |
| 50 extern bool sk_cpu_arm_has_neon(void) SK_PURE_FUNC; |
46 #endif | 51 #endif |
47 } | |
48 | 52 |
49 // Use SK_ARM_NEON_WRAP(symbol) to map 'symbol' to a NEON-specific symbol | 53 // Use SK_ARM_NEON_WRAP(symbol) to map 'symbol' to a NEON-specific symbol |
50 // when applicable. This will transform 'symbol' differently depending on | 54 // when applicable. This will transform 'symbol' differently depending on |
51 // the current NEON configuration, i.e.: | 55 // the current NEON configuration, i.e.: |
52 // | 56 // |
53 // NONE -> 'symbol' | 57 // NONE -> 'symbol' |
54 // ALWAYS -> 'symbol_neon' | 58 // ALWAYS -> 'symbol_neon' |
55 // DYNAMIC -> 'symbol' or 'symbol_neon' depending on runtime check. | 59 // DYNAMIC -> 'symbol' or 'symbol_neon' depending on runtime check. |
56 // | 60 // |
57 // The goal is to simplify user code, for example: | 61 // The goal is to simplify user code, for example: |
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73 // | 77 // |
74 #if SK_ARM_NEON_IS_NONE | 78 #if SK_ARM_NEON_IS_NONE |
75 # define SK_ARM_NEON_WRAP(x) (x) | 79 # define SK_ARM_NEON_WRAP(x) (x) |
76 #elif SK_ARM_NEON_IS_ALWAYS | 80 #elif SK_ARM_NEON_IS_ALWAYS |
77 # define SK_ARM_NEON_WRAP(x) (x ## _neon) | 81 # define SK_ARM_NEON_WRAP(x) (x ## _neon) |
78 #elif SK_ARM_NEON_IS_DYNAMIC | 82 #elif SK_ARM_NEON_IS_DYNAMIC |
79 # define SK_ARM_NEON_WRAP(x) (sk_cpu_arm_has_neon() ? x ## _neon : x) | 83 # define SK_ARM_NEON_WRAP(x) (sk_cpu_arm_has_neon() ? x ## _neon : x) |
80 #endif | 84 #endif |
81 | 85 |
82 #endif // SkUtilsArm_DEFINED | 86 #endif // SkUtilsArm_DEFINED |
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