mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-11-23 18:09:48 +00:00
94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
// ppc_power7.cpp - written and placed in the public domain by
|
|
// Jeffrey Walton, Uri Blumenthal and Marcel Raad.
|
|
//
|
|
// This source file uses intrinsics and built-ins to gain access to
|
|
// Power7 instructions. A separate source file is needed because
|
|
// additional CXXFLAGS are required to enable the appropriate
|
|
// instructions sets in some build configurations.
|
|
|
|
#include "pch.h"
|
|
#include "config.h"
|
|
|
|
#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
|
|
# include <signal.h>
|
|
# include <setjmp.h>
|
|
#endif
|
|
|
|
#if defined(__ALTIVEC__) || defined(_ARCH_PWR7)
|
|
# include "ppc_simd.h"
|
|
#endif
|
|
|
|
// Squash MS LNK4221 and libtool warnings
|
|
extern const char PPC_POWER7_FNAME[] = __FILE__;
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
// ************************* Feature Probes ************************* //
|
|
|
|
#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
|
|
extern "C" {
|
|
typedef void (*SigHandler)(int);
|
|
|
|
static jmp_buf s_jmpSIGILL;
|
|
static void SigIllHandler(int)
|
|
{
|
|
longjmp(s_jmpSIGILL, 1);
|
|
}
|
|
}
|
|
#endif // CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
|
|
|
|
#if (CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64)
|
|
bool CPU_ProbePower7()
|
|
{
|
|
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
|
|
return false;
|
|
#elif defined(CRYPTOPP_POWER7_AVAILABLE)
|
|
# if defined(CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY)
|
|
|
|
// longjmp and clobber warnings. Volatile is required.
|
|
// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
|
|
volatile int result = false;
|
|
|
|
volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
|
|
if (oldHandler == SIG_ERR)
|
|
return false;
|
|
|
|
volatile sigset_t oldMask;
|
|
if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
|
|
{
|
|
signal(SIGILL, oldHandler);
|
|
return false;
|
|
}
|
|
|
|
if (setjmp(s_jmpSIGILL))
|
|
result = false;
|
|
else
|
|
{
|
|
// POWER7 added unaligned loads and store operations
|
|
byte b1[19] = {255, 255, 255, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, b2[17];
|
|
|
|
// See comments in ppc_simd.h for some of these defines.
|
|
#if defined(_AIX) && defined(_ARCH_PWR7) && ((__xlC__ & 0xff00) == 0x0c00)
|
|
vec_xstw4(vec_xlw4(0, (unsigned int*)(b1+3)), 0, (unsigned int*)(b2+1));
|
|
result = (0 == std::memcmp(b1+3, b2+1, 16));
|
|
#elif defined(_ARCH_PWR7) && defined(__VSX__)
|
|
vec_xst(vec_xl(0, (unsigned int*)(b1+3)), 0, (unsigned int*)(b2+1));
|
|
result = (0 == std::memcmp(b1+3, b2+1, 16));
|
|
#else
|
|
result = false;
|
|
#endif
|
|
}
|
|
|
|
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
|
|
signal(SIGILL, oldHandler);
|
|
return result;
|
|
# endif
|
|
#else
|
|
return false;
|
|
#endif // _ARCH_PWR7
|
|
}
|
|
|
|
#endif // PPC32 or PPC64
|
|
|
|
NAMESPACE_END
|