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authorMicah Anderson <micah@riseup.net>2013-08-22 16:39:52 -0400
committerMicah Anderson <micah@riseup.net>2013-08-22 16:39:52 -0400
commit5e60e0e3af85f22aa0afe8bf0ecf85619afacfeb (patch)
tree6a91a3de86fa8de0b4167cc947ab72991bf8da31 /embeddedcryptopp/cpu.cpp
parent30e9097985656920f01a72efc1088caa2b8d41b3 (diff)
Imported Upstream version 0.6.0.12upstream/0.6.0.12
Diffstat (limited to 'embeddedcryptopp/cpu.cpp')
-rw-r--r--embeddedcryptopp/cpu.cpp199
1 files changed, 0 insertions, 199 deletions
diff --git a/embeddedcryptopp/cpu.cpp b/embeddedcryptopp/cpu.cpp
deleted file mode 100644
index 3e46804..0000000
--- a/embeddedcryptopp/cpu.cpp
+++ /dev/null
@@ -1,199 +0,0 @@
-// cpu.cpp - written and placed in the public domain by Wei Dai
-
-#include "pch.h"
-
-#ifndef CRYPTOPP_IMPORTS
-
-#include "cpu.h"
-#include "misc.h"
-#include <algorithm>
-
-#ifdef __GNUC__
-#include <signal.h>
-#include <setjmp.h>
-#endif
-
-#ifdef CRYPTOPP_MSVC6PP_OR_LATER
-#include <emmintrin.h>
-#endif
-
-NAMESPACE_BEGIN(CryptoPP)
-
-#ifdef CRYPTOPP_X86_ASM_AVAILABLE
-
-#ifndef _MSC_VER
-typedef void (*SigHandler)(int);
-
-static jmp_buf s_jmpNoCPUID;
-static void SigIllHandlerCPUID(int)
-{
- longjmp(s_jmpNoCPUID, 1);
-}
-#endif
-
-bool CpuId(word32 input, word32 *output)
-{
-#ifdef _MSC_VER
- __try
- {
- __asm
- {
- mov eax, input
- cpuid
- mov edi, output
- mov [edi], eax
- mov [edi+4], ebx
- mov [edi+8], ecx
- mov [edi+12], edx
- }
- }
- __except (1)
- {
- return false;
- }
- return true;
-#else
- SigHandler oldHandler = signal(SIGILL, SigIllHandlerCPUID);
- if (oldHandler == SIG_ERR)
- return false;
-
- bool result = true;
- if (setjmp(s_jmpNoCPUID))
- result = false;
- else
- {
- __asm__
- (
- // save ebx in case -fPIC is being used
-#if CRYPTOPP_BOOL_X86
- "push %%ebx; cpuid; mov %%ebx, %%edi; pop %%ebx"
-#else
- "pushq %%rbx; cpuid; mov %%ebx, %%edi; popq %%rbx"
-#endif
- : "=a" (output[0]), "=D" (output[1]), "=c" (output[2]), "=d" (output[3])
- : "a" (input)
- );
- }
-
- signal(SIGILL, oldHandler);
- return result;
-#endif
-}
-
-#ifndef _MSC_VER
-static jmp_buf s_jmpNoSSE2;
-static void SigIllHandlerSSE2(int)
-{
- longjmp(s_jmpNoSSE2, 1);
-}
-#endif
-
-#elif _MSC_VER >= 1400 && CRYPTOPP_BOOL_X64
-
-bool CpuId(word32 input, word32 *output)
-{
- __cpuid((int *)output, input);
- return true;
-}
-
-#endif
-
-#ifdef CRYPTOPP_CPUID_AVAILABLE
-
-static bool TrySSE2()
-{
-#if CRYPTOPP_BOOL_X64
- return true;
-#elif defined(_MSC_VER)
- __try
- {
-#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
- AS2(por xmm0, xmm0) // executing SSE2 instruction
-#elif CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
- __mm128i x = _mm_setzero_si128();
- return _mm_cvtsi128_si32(x) == 0;
-#endif
- }
- __except (1)
- {
- return false;
- }
- return true;
-#elif defined(__GNUC__)
- SigHandler oldHandler = signal(SIGILL, SigIllHandlerSSE2);
- if (oldHandler == SIG_ERR)
- return false;
-
- bool result = true;
- if (setjmp(s_jmpNoSSE2))
- result = false;
- else
- {
-#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
- __asm __volatile ("por %xmm0, %xmm0");
-#elif CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
- __mm128i x = _mm_setzero_si128();
- result = _mm_cvtsi128_si32(x) == 0;
-#endif
- }
-
- signal(SIGILL, oldHandler);
- return result;
-#else
- return false;
-#endif
-}
-
-bool g_x86DetectionDone = false;
-bool g_hasISSE = false, g_hasSSE2 = false, g_hasSSSE3 = false, g_hasMMX = false, g_isP4 = false;
-word32 g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
-
-void DetectX86Features()
-{
- word32 cpuid[4], cpuid1[4];
- if (!CpuId(0, cpuid))
- return;
- if (!CpuId(1, cpuid1))
- return;
-
- g_hasMMX = (cpuid1[3] & (1 << 23)) != 0;
- if ((cpuid1[3] & (1 << 26)) != 0)
- g_hasSSE2 = TrySSE2();
- g_hasSSSE3 = g_hasSSE2 && (cpuid1[2] & (1<<9));
-
- if ((cpuid1[3] & (1 << 25)) != 0)
- g_hasISSE = true;
- else
- {
- word32 cpuid2[4];
- CpuId(0x080000000, cpuid2);
- if (cpuid2[0] >= 0x080000001)
- {
- CpuId(0x080000001, cpuid2);
- g_hasISSE = (cpuid2[3] & (1 << 22)) != 0;
- }
- }
-
- std::swap(cpuid[2], cpuid[3]);
- if (memcmp(cpuid+1, "GenuineIntel", 12) == 0)
- {
- g_isP4 = ((cpuid1[0] >> 8) & 0xf) == 0xf;
- g_cacheLineSize = 8 * GETBYTE(cpuid1[1], 1);
- }
- else if (memcmp(cpuid+1, "AuthenticAMD", 12) == 0)
- {
- CpuId(0x80000005, cpuid);
- g_cacheLineSize = GETBYTE(cpuid[2], 0);
- }
-
- if (!g_cacheLineSize)
- g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
-
- g_x86DetectionDone = true;
-}
-
-#endif
-
-NAMESPACE_END
-
-#endif