diff options
Diffstat (limited to 'src/secp256k1/cmake/Check64bitAssembly.cmake')
| -rw-r--r-- | src/secp256k1/cmake/Check64bitAssembly.cmake | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/secp256k1/cmake/Check64bitAssembly.cmake b/src/secp256k1/cmake/Check64bitAssembly.cmake new file mode 100644 index 0000000000..3f65887765 --- /dev/null +++ b/src/secp256k1/cmake/Check64bitAssembly.cmake @@ -0,0 +1,14 @@ +include(CheckCSourceCompiles) + +function(check_64bit_assembly) + check_c_source_compiles(" + #include <stdint.h> + + int main() + { + uint64_t a = 11, tmp; + __asm__ __volatile__(\"movq $0x100000000,%1; mulq %%rsi\" : \"+a\"(a) : \"S\"(tmp) : \"cc\", \"%rdx\"); + } + " HAS_64BIT_ASM) + set(HAS_64BIT_ASM ${HAS_64BIT_ASM} PARENT_SCOPE) +endfunction() |