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// ppc_power8.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
// Power8 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(_ARCH_PWR8) || defined(__CRYPTO__)
# include "ppc_simd.h"
#endif
// Squash MS LNK4221 and libtool warnings
extern const char PPC_POWER8_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_ProbePower8()
{
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
return false;
#elif defined(CRYPTOPP_POWER8_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
{
// This is 64-bit add "vaddudm v0, v1, v0" from POWER8. We cannot use
// vec_add because GCC uses POWER8 instructions outside this SIGILL block.
// https://github.com/weidai11/cryptopp/issues/1112 and
// https://github.com/weidai11/cryptopp/issues/1115.
#if CRYPTOPP_BIG_ENDIAN
__asm__ __volatile__ (".byte 0x10, 0x01, 0x00, 0xc0 \n\t" : : : "v0");
#else
__asm__ __volatile__ (".byte 0xc0, 0x00, 0x01, 0x10 \n\t" : : : "v0");
#endif
result = true;
}
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
signal(SIGILL, oldHandler);
return result;
# endif
#else
return false;
#endif // _ARCH_PWR8
}
///////////
bool CPU_ProbePMULL()
{
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
return false;
#elif (CRYPTOPP_POWER8_VMULL_AVAILABLE)
// longjmp and clobber warnings. Volatile is required.
volatile bool 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
{
// This is VMULL 'vpmsumd v0,v0,v1'
#if CRYPTOPP_BIG_ENDIAN
__asm__ __volatile__ (".byte 0x10, 0x00, 0x0c, 0xc8 \n\t" : : : "v0");
#else
__asm__ __volatile__ (".byte 0xc8, 0x0c, 0x00, 0x10 \n\t" : : : "v0");
#endif
result = true;
}
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
signal(SIGILL, oldHandler);
return result;
#else
return false;
#endif // CRYPTOPP_POWER8_VMULL_AVAILABLE
}
///////////
bool CPU_ProbeAES()
{
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
return false;
#elif defined(CRYPTOPP_POWER8_AES_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
{
// This is AES 'vcipher v0,v0,v1' followed by 'vcipherlast v0,v0,v1'
#if CRYPTOPP_BIG_ENDIAN
__asm__ __volatile__ (".byte 0x10, 0x00, 0x0d, 0x08 \n\t"
".byte 0x10, 0x00, 0x0d, 0x09 \n\t" : : : "v0");
#else
__asm__ __volatile__ (".byte 0x08, 0x0d, 0x00, 0x10 \n\t"
".byte 0x09, 0x0d, 0x00, 0x10 \n\t" : : : "v0");
#endif
result = true;
}
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
signal(SIGILL, oldHandler);
return result;
# endif
#else
return false;
#endif // __CRYPTO__
}
bool CPU_ProbeSHA256()
{
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
return false;
#elif defined(CRYPTOPP_POWER8_SHA_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
{
// This is SHA-256 'vshasigmaw v0,v0,1,15'.
#if CRYPTOPP_BIG_ENDIAN
__asm__ __volatile__ (".byte 0x10, 0x00, 0xfe, 0x82 \n\t" : : : "v0");
#else
__asm__ __volatile__ (".byte 0x82, 0xfe, 0x00, 0x10 \n\t" : : : "v0");
#endif
result = true;
}
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
signal(SIGILL, oldHandler);
return result;
# endif
#else
return false;
#endif // CRYPTOPP_ALTIVEC_AVAILABLE
}
bool CPU_ProbeSHA512()
{
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
return false;
#elif defined(CRYPTOPP_POWER8_SHA_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
{
// This is SHA-512 'vshasigmad v0,v0,1,15'.
#if CRYPTOPP_BIG_ENDIAN
__asm__ __volatile__ (".byte 0x10, 0x00, 0xfe, 0xc2 \n\t" : : : "v0");
#else
__asm__ __volatile__ (".byte 0xc2, 0xfe, 0x00, 0x10 \n\t" : : : "v0");
#endif
result = true;
}
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
signal(SIGILL, oldHandler);
return result;
# endif
#else
return false;
#endif // CRYPTOPP_POWER8_AVAILABLE
}
#endif // PPC32 or PPC64
NAMESPACE_END
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