From 9a895bedde8ded1edbb814edb22a7197931a0d5b Mon Sep 17 00:00:00 2001 From: El Mostafa Idrassi Date: Fri, 4 Oct 2019 13:07:10 +0100 Subject: Fix "error "SSSE3 instruction set not enabled" when compiling using GCC version < 4.9 without -mssse3 option (SSSE3=1 when using make). (#507) Compiling with -mxxx defines the corresponding macro of the intrinsics. For example, -mssse3 defines __SSSE3__ macro to 1. In GCC versions < 4.9, it is not possible to use and call x86 intrinsics only at runtime without compiling the entire file with the -mxxx option. For example, if we want to call SSSE3 intrinsics without compiling with -mssse3, the macro __SSSE3__ is not defined. Therefore, when including , this results in "error "SSSE3 instruction set not enabled"" because of : #ifndef __SSSE3__ # error "SSSE3 instruction set not enabled" Since GCC 4.9, this has been fixed and it is possible to call x86 intrinsics from select functions in a file that are tagged with the corresponding target attribute without having to compile the entire file with the -mxxx option. This can be seen in which in recent versions (>= 4.9) contains : #ifndef __SSSE3__ #pragma GCC push_options #pragma GCC target("ssse3") #define __DISABLE_SSSE3__ Since SSSE3 is only used under Windows for ChaCha256, this can be fixed by preceding '#include ' with #if defined (_MSC_VER) && !defined (TC_WINDOWS_BOOT). See https://gcc.gnu.org/gcc-4.9/changes.html --- src/Crypto/cpu.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'src/Crypto/cpu.h') diff --git a/src/Crypto/cpu.h b/src/Crypto/cpu.h index 28296e86..e7affaef 100644 --- a/src/Crypto/cpu.h +++ b/src/Crypto/cpu.h @@ -144,6 +144,7 @@ extern __m128i _mm_set1_epi64x (__int64 a); #endif #if CRYPTOPP_SSSE3_AVAILABLE || defined(__INTEL_COMPILER) +#if defined (_MSC_VER) && !defined (TC_WINDOWS_BOOT) #if defined(TC_WINDOWS_DRIVER) || defined (_UEFI) #if defined(__cplusplus) extern "C" { @@ -155,6 +156,7 @@ extern __m128i _mm_shuffle_epi8 (__m128i a, __m128i b); #else #include #endif +#endif #if defined(__SSE4_1__) || defined(__INTEL_COMPILER) || defined(_MSC_VER) #if defined(TC_WINDOWS_DRIVER) || defined (_UEFI) -- cgit v1.2.3