diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/entropy/rdrand/rdrand.cpp | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/entropy/rdrand/rdrand.cpp b/src/entropy/rdrand/rdrand.cpp index 72abd6166..51b2bd5f6 100644 --- a/src/entropy/rdrand/rdrand.cpp +++ b/src/entropy/rdrand/rdrand.cpp @@ -7,7 +7,10 @@ #include <botan/internal/rdrand.h> #include <botan/cpuid.h> -#include <immintrin.h> + +#if !defined(BOTAN_USE_GCC_INLINE_ASM) + #include <immintrin.h> +#endif namespace Botan { @@ -41,8 +44,10 @@ void Intel_Rdrand::poll(Entropy_Accumulator& accum) #if BOTAN_USE_GCC_INLINE_ASM int cf = 0; - asm("rdrand %0; adcl $0,%1" : - "=r" (r), "=r" (cf) : "0" (r), "1" (cf) : "cc"); + + // Encoding of rdrand %eax + asm(".byte 0x0F, 0xC7, 0xF0; adcl $0,%1" : + "=a" (r), "=r" (cf) : "0" (r), "1" (cf) : "cc"); #else int cf = _rdrand32_step(&r); #endif |