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| author |  digit@google.com <digit@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-08-01 15:58:41 +0000 |
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| committer | digit@google.com <digit@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-08-01 15:58:41 +0000 |
| commit | fbf31949ac31271362750168ffcb13a04408b721 (patch) | |
| tree | e9b0ce53067795fec7404cb28ae96e4beb7d3af5 /src/core/SkUtilsArm.h | |
| parent | 830b8793bb1646bb76817bdc228dd8e2a92bef7d (diff) | |
arm: Move SkUtilsArm.h from include/core to src/core
There is no reason to make this visible to client code.
Review URL: https://codereview.appspot.com/6441082
git-svn-id: http://skia.googlecode.com/svn/trunk@4892 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'src/core/SkUtilsArm.h')
| -rw-r--r-- | src/core/SkUtilsArm.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/core/SkUtilsArm.h b/src/core/SkUtilsArm.h new file mode 100644 index 0000000000..4562b01923 --- /dev/null +++ b/src/core/SkUtilsArm.h @@ -0,0 +1,53 @@ + +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkUtilsArm_DEFINED +#define SkUtilsArm_DEFINED + +#include "SkUtils.h" + +// Define SK_ARM_NEON_MODE to one of the following values +// corresponding respectively to: +// - No ARM Neon support at all (not targetting ARMv7-A, or don't have NEON) +// - Full ARM Neon support (i.e. assume the CPU always supports it) +// - Optional ARM Neon support (i.e. probe CPU at runtime) +// +#define SK_ARM_NEON_MODE_NONE 0 +#define SK_ARM_NEON_MODE_ALWAYS 1 +#define SK_ARM_NEON_MODE_DYNAMIC 2 + +#if defined(__arm__) && defined(__ARM_HAVE_OPTIONAL_NEON_SUPPORT) +# define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_DYNAMIC +#elif defined(__arm__) && defined(__ARM_HAVE_NEON) +# define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_ALWAYS +#else +# define SK_ARM_NEON_MODE SK_ARM_NEON_MODE_NONE +#endif + +// Convenience test macros, always defined as 0 or 1 +#define SK_ARM_NEON_IS_NONE (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_NONE) +#define SK_ARM_NEON_IS_ALWAYS (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_ALWAYS) +#define SK_ARM_NEON_IS_DYNAMIC (SK_ARM_NEON_MODE == SK_ARM_NEON_MODE_DYNAMIC) + +// The sk_cpu_arm_has_neon() function returns true iff the target device +// is ARMv7-A and supports Neon instructions. In DYNAMIC mode, this actually +// probes the CPU at runtime (and caches the result). + +#if SK_ARM_NEON_IS_NONE +static bool sk_cpu_arm_has_neon(void) { + return false; +} +#elif SK_ARM_NEON_IS_ALWAYS +static bool sk_cpu_arm_has_neon(void) { + return true; +} +#else // SK_ARM_NEON_IS_DYNAMIC +extern bool sk_cpu_arm_has_neon(void); +#endif + +#endif // SkUtilsArm_DEFINED |