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-rw-r--r--qemu/disas/libvixl/vixl/compiler-intrinsics.cc144
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diff --git a/qemu/disas/libvixl/vixl/compiler-intrinsics.cc b/qemu/disas/libvixl/vixl/compiler-intrinsics.cc
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index fd551faeb..000000000
--- a/qemu/disas/libvixl/vixl/compiler-intrinsics.cc
+++ /dev/null
@@ -1,144 +0,0 @@
-// Copyright 2015, ARM Limited
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-//
-// * Redistributions of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above copyright notice,
-// this list of conditions and the following disclaimer in the documentation
-// and/or other materials provided with the distribution.
-// * Neither the name of ARM Limited nor the names of its contributors may be
-// used to endorse or promote products derived from this software without
-// specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
-// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
-// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "compiler-intrinsics.h"
-
-namespace vixl {
-
-
-int CountLeadingSignBitsFallBack(int64_t value, int width) {
- VIXL_ASSERT(IsPowerOf2(width) && (width <= 64));
- if (value >= 0) {
- return CountLeadingZeros(value, width) - 1;
- } else {
- return CountLeadingZeros(~value, width) - 1;
- }
-}
-
-
-int CountLeadingZerosFallBack(uint64_t value, int width) {
- VIXL_ASSERT(IsPowerOf2(width) && (width <= 64));
- if (value == 0) {
- return width;
- }
- int count = 0;
- value = value << (64 - width);
- if ((value & UINT64_C(0xffffffff00000000)) == 0) {
- count += 32;
- value = value << 32;
- }
- if ((value & UINT64_C(0xffff000000000000)) == 0) {
- count += 16;
- value = value << 16;
- }
- if ((value & UINT64_C(0xff00000000000000)) == 0) {
- count += 8;
- value = value << 8;
- }
- if ((value & UINT64_C(0xf000000000000000)) == 0) {
- count += 4;
- value = value << 4;
- }
- if ((value & UINT64_C(0xc000000000000000)) == 0) {
- count += 2;
- value = value << 2;
- }
- if ((value & UINT64_C(0x8000000000000000)) == 0) {
- count += 1;
- }
- count += (value == 0);
- return count;
-}
-
-
-int CountSetBitsFallBack(uint64_t value, int width) {
- VIXL_ASSERT(IsPowerOf2(width) && (width <= 64));
-
- // Mask out unused bits to ensure that they are not counted.
- value &= (UINT64_C(0xffffffffffffffff) >> (64 - width));
-
- // Add up the set bits.
- // The algorithm works by adding pairs of bit fields together iteratively,
- // where the size of each bit field doubles each time.
- // An example for an 8-bit value:
- // Bits: h g f e d c b a
- // \ | \ | \ | \ |
- // value = h+g f+e d+c b+a
- // \ | \ |
- // value = h+g+f+e d+c+b+a
- // \ |
- // value = h+g+f+e+d+c+b+a
- const uint64_t kMasks[] = {
- UINT64_C(0x5555555555555555),
- UINT64_C(0x3333333333333333),
- UINT64_C(0x0f0f0f0f0f0f0f0f),
- UINT64_C(0x00ff00ff00ff00ff),
- UINT64_C(0x0000ffff0000ffff),
- UINT64_C(0x00000000ffffffff),
- };
-
- for (unsigned i = 0; i < (sizeof(kMasks) / sizeof(kMasks[0])); i++) {
- int shift = 1 << i;
- value = ((value >> shift) & kMasks[i]) + (value & kMasks[i]);
- }
-
- return static_cast<int>(value);
-}
-
-
-int CountTrailingZerosFallBack(uint64_t value, int width) {
- VIXL_ASSERT(IsPowerOf2(width) && (width <= 64));
- int count = 0;
- value = value << (64 - width);
- if ((value & UINT64_C(0xffffffff)) == 0) {
- count += 32;
- value = value >> 32;
- }
- if ((value & 0xffff) == 0) {
- count += 16;
- value = value >> 16;
- }
- if ((value & 0xff) == 0) {
- count += 8;
- value = value >> 8;
- }
- if ((value & 0xf) == 0) {
- count += 4;
- value = value >> 4;
- }
- if ((value & 0x3) == 0) {
- count += 2;
- value = value >> 2;
- }
- if ((value & 0x1) == 0) {
- count += 1;
- }
- count += (value == 0);
- return count - (64 - width);
-}
-
-
-} // namespace vixl