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Workaround for compiler bug (GCC 4.8 and 4.9 when targetting 32-bit x86).

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This commit is contained in:
Thomas Pornin 2017-04-17 13:36:06 +00:00
parent ad6a51bde3
commit d021b7eb7f
2 changed files with 9 additions and 5 deletions
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8
src/hash/ghash_pclmul.c
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@ -35,13 +35,11 @@
#if BR_AES_X86NI_GCC_OLD
#pragma GCC push_options
#pragma GCC target("sse2,ssse3,pclmul")
#pragma GCC diagnostic ignored "-Wpsabi"
#endif
#include <tmmintrin.h>
#include <wmmintrin.h>
#include <cpuid.h>
#if BR_AES_X86NI_GCC_OLD
#pragma GCC pop_options
#endif
#endif
#if BR_AES_X86NI_MSC
@ -349,6 +347,10 @@ br_ghash_pclmul_get(void)
return pclmul_supported() ? &br_ghash_pclmul : 0;
}
#if BR_AES_X86NI_GCC && BR_AES_X86NI_GCC_OLD
#pragma GCC pop_options
#endif
#else
/* see bearssl_hash.h */

6
src/inner.h
View file

@ -157,10 +157,12 @@
* GCC versions from 4.4 to 4.8 (inclusive) must use a special #pragma
* to activate extra opcodes before including the relevant intrinsic
* headers. But these don't work with Clang (which does not need them
* either).
* either). We also need that #pragma for GCC 4.9 in order to work
* around a compiler bug (it tends to blow up on ghash_pclmul code
* otherwise).
*/
#if BR_AES_X86NI_GCC && !defined BR_AES_X86NI_GCC_OLD
#if __GNUC__ == 4 && __GNUC_MINOR__ >= 4 && __GNUC_MINOR__ <= 8 && !__clang__
#if __GNUC__ == 4 && __GNUC_MINOR__ >= 4 && __GNUC_MINOR__ <= 9 && !__clang__
#define BR_AES_X86NI_GCC_OLD 1
#endif
#endif