247 lines
7.0 KiB
C++
247 lines
7.0 KiB
C++
// ppc_power8.cpp - written and placed in the public domain by
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// Jeffrey Walton, Uri Blumenthal and Marcel Raad.
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//
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// This source file uses intrinsics and built-ins to gain access to
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// Power8 instructions. A separate source file is needed because
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// additional CXXFLAGS are required to enable the appropriate
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// instructions sets in some build configurations.
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#include "pch.h"
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#include "config.h"
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#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
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# include <signal.h>
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# include <setjmp.h>
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#endif
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#if defined(_ARCH_PWR8) || defined(__CRYPTO__)
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# include "ppc_simd.h"
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#endif
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// Squash MS LNK4221 and libtool warnings
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extern const char PPC_POWER8_FNAME[] = __FILE__;
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NAMESPACE_BEGIN(CryptoPP)
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// ************************* Feature Probes ************************* //
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#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
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extern "C" {
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typedef void (*SigHandler)(int);
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static jmp_buf s_jmpSIGILL;
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static void SigIllHandler(int)
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{
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longjmp(s_jmpSIGILL, 1);
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}
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}
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#endif // CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
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#if (CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64)
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bool CPU_ProbePower8()
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{
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#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
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return false;
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#elif (_ARCH_PWR8) && defined(CRYPTOPP_POWER8_AVAILABLE)
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# if defined(CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY)
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// longjmp and clobber warnings. Volatile is required.
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// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
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volatile int result = true;
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volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
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if (oldHandler == SIG_ERR)
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return false;
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volatile sigset_t oldMask;
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if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
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{
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signal(SIGILL, oldHandler);
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return false;
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}
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if (setjmp(s_jmpSIGILL))
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result = false;
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else
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{
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// POWER8 added 64-bit SIMD operations
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const word64 x = W64LIT(0xffffffffffffffff);
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word64 w1[2] = {x, x}, w2[2] = {4, 6}, w3[2];
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// Specifically call the VSX loads and stores with 64-bit types
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#if defined(__ibmxl__) || (defined(_AIX) && defined(__xlC__)) || defined(__clang__)
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const uint64x2_p v1 = vec_xl(0, (unsigned long long*)w1);
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const uint64x2_p v2 = vec_xl(0, (unsigned long long*)w2);
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const uint64x2_p v3 = vec_add(v1, v2); // 64-bit add
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vec_xst(v3, 0, (unsigned long long*)w3);
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#else
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const uint64x2_p v1 = (uint64x2_p)vec_vsx_ld(0, (const byte*)w1);
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const uint64x2_p v2 = (uint64x2_p)vec_vsx_ld(0, (const byte*)w2);
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const uint64x2_p v3 = vec_add(v1, v2); // 64-bit add
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vec_vsx_st((uint8x16_p)v3, 0, (byte*)w3);
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#endif
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// Relies on integer wrap
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result = (w3[0] == 3 && w3[1] == 5);
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}
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sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
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signal(SIGILL, oldHandler);
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return result;
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# endif
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#else
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return false;
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#endif // _ARCH_PWR8
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}
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bool CPU_ProbeAES()
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{
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#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
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return false;
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#elif (__CRYPTO__) && defined(CRYPTOPP_POWER8_AES_AVAILABLE)
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# if defined(CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY)
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// longjmp and clobber warnings. Volatile is required.
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// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
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volatile int result = true;
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volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
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if (oldHandler == SIG_ERR)
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return false;
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volatile sigset_t oldMask;
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if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
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{
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signal(SIGILL, oldHandler);
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return false;
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}
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if (setjmp(s_jmpSIGILL))
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result = false;
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else
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{
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byte key[16] = {0xA0, 0xFA, 0xFE, 0x17, 0x88, 0x54, 0x2c, 0xb1,
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0x23, 0xa3, 0x39, 0x39, 0x2a, 0x6c, 0x76, 0x05};
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byte state[16] = {0x19, 0x3d, 0xe3, 0xb3, 0xa0, 0xf4, 0xe2, 0x2b,
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0x9a, 0xc6, 0x8d, 0x2a, 0xe9, 0xf8, 0x48, 0x08};
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byte r[16] = {255}, z[16] = {};
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uint8x16_p k = (uint8x16_p)VecLoad(0, key);
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uint8x16_p s = (uint8x16_p)VecLoad(0, state);
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s = VecEncrypt(s, k);
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s = VecEncryptLast(s, k);
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s = VecDecrypt(s, k);
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s = VecDecryptLast(s, k);
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VecStore(s, r);
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result = (0 != std::memcmp(r, z, 16));
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}
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sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
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signal(SIGILL, oldHandler);
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return result;
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# endif
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#else
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return false;
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#endif // __CRYPTO__
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}
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bool CPU_ProbeSHA256()
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{
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#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
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return false;
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#elif (__CRYPTO__) && defined(CRYPTOPP_POWER8_SHA_AVAILABLE)
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# if defined(CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY)
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// longjmp and clobber warnings. Volatile is required.
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// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
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volatile int result = false;
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volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
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if (oldHandler == SIG_ERR)
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return false;
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volatile sigset_t oldMask;
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if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
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{
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signal(SIGILL, oldHandler);
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return false;
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}
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if (setjmp(s_jmpSIGILL))
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result = false;
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else
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{
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byte r[16], z[16] = {0};
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uint8x16_p x = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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x = VecSHA256<0,0>(x);
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x = VecSHA256<0,0xf>(x);
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x = VecSHA256<1,0>(x);
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x = VecSHA256<1,0xf>(x);
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VecStore(x, r);
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result = (0 == std::memcmp(r, z, 16));
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}
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sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
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signal(SIGILL, oldHandler);
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return result;
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# endif
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#else
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return false;
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#endif // CRYPTOPP_ALTIVEC_AVAILABLE
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}
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bool CPU_ProbeSHA512()
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{
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#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
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return false;
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#elif (__CRYPTO__) && defined(CRYPTOPP_POWER8_SHA_AVAILABLE)
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# if defined(CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY)
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// longjmp and clobber warnings. Volatile is required.
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// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
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volatile int result = false;
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volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
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if (oldHandler == SIG_ERR)
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return false;
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volatile sigset_t oldMask;
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if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
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{
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signal(SIGILL, oldHandler);
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return false;
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}
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if (setjmp(s_jmpSIGILL))
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result = false;
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else
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{
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byte r[16], z[16] = {0};
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uint8x16_p x = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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x = VecSHA512<0,0>(x);
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x = VecSHA512<0,0xf>(x);
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x = VecSHA512<1,0>(x);
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x = VecSHA512<1,0xf>(x);
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VecStore(x, r);
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result = (0 == std::memcmp(r, z, 16));
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}
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sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
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signal(SIGILL, oldHandler);
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return result;
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# endif
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#else
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return false;
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#endif // CRYPTOPP_POWER8_AVAILABLE
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}
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#endif // PPC32 or PPC64
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NAMESPACE_END
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