summaryrefslogtreecommitdiffstats
path: root/third_party/aom/aom_ports/bitops.h
diff options
context:
space:
mode:
authorMatt A. Tobin <email@mattatobin.com>2020-04-07 23:30:51 -0400
committerMatt A. Tobin <email@mattatobin.com>2020-04-07 23:30:51 -0400
commit5545a8983ff0ef1fb52e64aef8e66fa9b13c1cbb (patch)
tree45d55e3e5e73c4255c4d71258d9be5b2d004d28f /third_party/aom/aom_ports/bitops.h
parent50f1986697a7412e4160976fa5e11217b4ef1f44 (diff)
downloadUXP-5545a8983ff0ef1fb52e64aef8e66fa9b13c1cbb.tar
UXP-5545a8983ff0ef1fb52e64aef8e66fa9b13c1cbb.tar.gz
UXP-5545a8983ff0ef1fb52e64aef8e66fa9b13c1cbb.tar.lz
UXP-5545a8983ff0ef1fb52e64aef8e66fa9b13c1cbb.tar.xz
UXP-5545a8983ff0ef1fb52e64aef8e66fa9b13c1cbb.zip
Move aom source to a sub-directory under media/libaom
There is no damned reason to treat this differently than any other media lib given its license and there never was.
Diffstat (limited to 'third_party/aom/aom_ports/bitops.h')
-rw-r--r--third_party/aom/aom_ports/bitops.h78
1 files changed, 0 insertions, 78 deletions
diff --git a/third_party/aom/aom_ports/bitops.h b/third_party/aom/aom_ports/bitops.h
deleted file mode 100644
index 44df17307..000000000
--- a/third_party/aom/aom_ports/bitops.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * Copyright (c) 2016, Alliance for Open Media. All rights reserved
- *
- * This source code is subject to the terms of the BSD 2 Clause License and
- * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
- * was not distributed with this source code in the LICENSE file, you can
- * obtain it at www.aomedia.org/license/software. If the Alliance for Open
- * Media Patent License 1.0 was not distributed with this source code in the
- * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
- */
-
-#ifndef AOM_AOM_PORTS_BITOPS_H_
-#define AOM_AOM_PORTS_BITOPS_H_
-
-#include <assert.h>
-
-#include "aom_ports/msvc.h"
-#include "config/aom_config.h"
-
-#ifdef _MSC_VER
-#if defined(_M_X64) || defined(_M_IX86)
-#include <intrin.h>
-#define USE_MSC_INTRINSICS
-#endif
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// get_msb:
-// Returns (int)floor(log2(n)). n must be > 0.
-// These versions of get_msb() are only valid when n != 0 because all
-// of the optimized versions are undefined when n == 0:
-// https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
-
-// use GNU builtins where available.
-#if defined(__GNUC__) && \
- ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
-static INLINE int get_msb(unsigned int n) {
- assert(n != 0);
- return 31 ^ __builtin_clz(n);
-}
-#elif defined(USE_MSC_INTRINSICS)
-#pragma intrinsic(_BitScanReverse)
-
-static INLINE int get_msb(unsigned int n) {
- unsigned long first_set_bit;
- assert(n != 0);
- _BitScanReverse(&first_set_bit, n);
- return first_set_bit;
-}
-#undef USE_MSC_INTRINSICS
-#else
-static INLINE int get_msb(unsigned int n) {
- int log = 0;
- unsigned int value = n;
- int i;
-
- assert(n != 0);
-
- for (i = 4; i >= 0; --i) {
- const int shift = (1 << i);
- const unsigned int x = value >> shift;
- if (x != 0) {
- value = x;
- log += shift;
- }
- }
- return log;
-}
-#endif
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#endif // AOM_AOM_PORTS_BITOPS_H_