csecp256k1

Haskell FFI bindings to bitcoin-core/secp256k1 (docs.ppad.tech/csecp256k1).
git clone git://git.ppad.tech/csecp256k1.git
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CheckX86_64Assembly.cmake (371B)

      1 include(CheckCSourceCompiles)
      2 
      3 function(check_x86_64_assembly)
      4   check_c_source_compiles("
      5     #include <stdint.h>
      6 
      7     int main()
      8     {
      9       uint64_t a = 11, tmp;
     10       __asm__ __volatile__(\"movq $0x100000000,%1; mulq %%rsi\" : \"+a\"(a) : \"S\"(tmp) : \"cc\", \"%rdx\");
     11     }
     12   " HAVE_X86_64_ASM)
     13   set(HAVE_X86_64_ASM ${HAVE_X86_64_ASM} PARENT_SCOPE)
     14 endfunction()