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https://github.com/tesseract-ocr/tesseract.git
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534a237015
This information is not needed for normal runs, so it is sufficient to show it on request (like versions and OpenCL information). This also fixes a crash caused by undefined order of global constructors: When the global variable SIMDDetect::detector is initialized before the global variable debug_file, the first tprintf call in simddetect.cpp crashes because of a NULL pointer in debug_file. This was only seen when running with a shared library (libtesseract.so). Signed-off-by: Stefan Weil <sw@weilnetz.de>
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
///////////////////////////////////////////////////////////////////////
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// File: simddetect.h
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// Description: Architecture detector.
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// Author: Stefan Weil (based on code from Ray Smith)
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//
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// (C) Copyright 2014, Google Inc.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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///////////////////////////////////////////////////////////////////////
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#include "simddetect.h"
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#include "tprintf.h"
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#undef X86_BUILD
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#if defined(__x86_64__) || defined(__i386__) || defined(_WIN32)
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# if !defined(ANDROID_BUILD)
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# define X86_BUILD 1
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# endif // !ANDROID_BUILD
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#endif // x86 target
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#if defined(X86_BUILD)
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# if defined(__linux__) || defined(__MINGW32__)
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# include <cpuid.h>
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# elif defined(_WIN32)
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# include <intrin.h>
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# endif
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#endif
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SIMDDetect SIMDDetect::detector;
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// If true, then AVX has been detected.
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bool SIMDDetect::avx_available_;
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// If true, then SSe4.1 has been detected.
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bool SIMDDetect::sse_available_;
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// Constructor.
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// Tests the architecture in a system-dependent way to detect AVX, SSE and
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// any other available SIMD equipment.
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SIMDDetect::SIMDDetect() {
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#if defined(X86_BUILD)
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# if defined(__linux__) || defined(__MINGW32__)
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unsigned int eax, ebx, ecx, edx;
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if (__get_cpuid(1, &eax, &ebx, &ecx, &edx) != 0) {
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sse_available_ = (ecx & 0x00080000) != 0;
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avx_available_ = (ecx & 0x10000000) != 0;
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}
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# elif defined(_WIN32)
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int cpuInfo[4];
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__cpuid(cpuInfo, 0);
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if (cpuInfo[0] >= 1) {
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__cpuid(cpuInfo, 1);
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sse_available_ = (cpuInfo[2] & 0x00080000) != 0;
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avx_available_ = (cpuInfo[2] & 0x10000000) != 0;
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}
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# endif
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#endif // X86_BUILD
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}
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