First Commit

externals/cryptopp/power8_ppc.cpp

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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