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Improved comments in macro magic

pull/270/head
Jeffrey Walton 2016-09-12 19:05:09 -04:00
parent 947b411f9d
commit abd14a4b0a
1 changed files with 14 additions and 11 deletions
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25
gcm.cpp
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@ -28,13 +28,16 @@
NAMESPACE_BEGIN(CryptoPP) NAMESPACE_BEGIN(CryptoPP)
// Different assemblers accept different mnemonic: 'movd eax, xmm0' vs 'movd rax, xmm0' vs 'mov eax, xmm0' vs 'mov rax, xmm0' // Different assemblers accept different mnemonics: 'movd eax, xmm0' vs 'movd rax, xmm0' vs 'mov eax, xmm0' vs 'mov rax, xmm0'
#if (CRYPTOPP_LLVM_CLANG_VERSION >= 30600) || (CRYPTOPP_APPLE_CLANG_VERSION >= 70000) || defined(CRYPTOPP_CLANG_INTEGRATED_ASSEMBLER) #if (CRYPTOPP_LLVM_CLANG_VERSION >= 30600) || (CRYPTOPP_APPLE_CLANG_VERSION >= 70000) || defined(CRYPTOPP_CLANG_INTEGRATED_ASSEMBLER)
# define USE_MOVD_EXX_REG 1 // 'movd eax, xmm0' only. REG_WORD() macro not used.
# define USE_MOVD_REG32 1
#elif (defined(CRYPTOPP_LLVM_CLANG_VERSION) || defined(CRYPTOPP_APPLE_CLANG_VERSION)) && defined(CRYPTOPP_X64_ASM_AVAILABLE) #elif (defined(CRYPTOPP_LLVM_CLANG_VERSION) || defined(CRYPTOPP_APPLE_CLANG_VERSION)) && defined(CRYPTOPP_X64_ASM_AVAILABLE)
# define USE_MOVD_EXX_OR_RXX_REG 1 // 'movd eax, xmm0' or 'movd rax, xmm0'. REG_WORD() macro supplies REG32 or REG64.
#else // GNU Assembler # define USE_MOVD_REG32_OR_REG64 1
# define USE_MOV_EXX_OR_RXX_REG 1 #else
// 'mov eax, xmm0' or 'mov rax, xmm0'. REG_WORD() macro supplies REG32 or REG64.
# define USE_MOV_REG32_OR_REG64 1
#endif #endif
word16 GCM_Base::s_reductionTable[256]; word16 GCM_Base::s_reductionTable[256];
@ -896,9 +899,9 @@ size_t GCM_Base::AuthenticateBlocks(const byte *data, size_t len)
AS2( pxor xmm5, xmm2 ) AS2( pxor xmm5, xmm2 )
AS2( psrldq xmm0, 15 ) AS2( psrldq xmm0, 15 )
#if USE_MOVD_EXX_REG #if USE_MOVD_REG32
AS2( movd edi, xmm0 ) AS2( movd edi, xmm0 )
#elif USE_MOVD_EXX_OR_RXX_REG #elif USE_MOVD_REG32_OR_REG64
AS2( mov WORD_REG(di), xmm0 ) AS2( mov WORD_REG(di), xmm0 )
#else // GNU Assembler #else // GNU Assembler
AS2( movd WORD_REG(di), xmm0 ) AS2( movd WORD_REG(di), xmm0 )
@ -911,9 +914,9 @@ size_t GCM_Base::AuthenticateBlocks(const byte *data, size_t len)
AS2( pxor xmm4, xmm5 ) AS2( pxor xmm4, xmm5 )
AS2( psrldq xmm1, 15 ) AS2( psrldq xmm1, 15 )
#if USE_MOVD_EXX_REG #if USE_MOVD_REG32
AS2( movd edi, xmm1 ) AS2( movd edi, xmm1 )
#elif USE_MOVD_EXX_OR_RXX_REG #elif USE_MOVD_REG32_OR_REG64
AS2( mov WORD_REG(di), xmm1 ) AS2( mov WORD_REG(di), xmm1 )
#else #else
AS2( movd WORD_REG(di), xmm1 ) AS2( movd WORD_REG(di), xmm1 )
@ -922,9 +925,9 @@ size_t GCM_Base::AuthenticateBlocks(const byte *data, size_t len)
AS2( shl eax, 8 ) AS2( shl eax, 8 )
AS2( psrldq xmm0, 15 ) AS2( psrldq xmm0, 15 )
#if USE_MOVD_EXX_REG #if USE_MOVD_REG32
AS2( movd edi, xmm0 ) AS2( movd edi, xmm0 )
#elif USE_MOVD_EXX_OR_RXX_REG #elif USE_MOVD_REG32_OR_REG64
AS2( mov WORD_REG(di), xmm0 ) AS2( mov WORD_REG(di), xmm0 )
#else #else
AS2( movd WORD_REG(di), xmm0 ) AS2( movd WORD_REG(di), xmm0 )