Getting this error when trying to compile this source file using GCC: https://github.com/wolf9466/cpuminer-multi/blob/master/cryptonight_aesni.c
"cryptonight_aesni.c:162:4: error: inconsistent operand constraints"
Specifically:
uint64_t hi, lo;
// hi,lo = 64bit x 64bit multiply of c[0] and b[0]
__asm__("mulq %3\n\t"
: "=d" (hi),
"=a" (lo)
: "%a" (c[0]),
"rm" (b[0])
: "cc" );
Very difficult to find out what this error even means, yet alone how to fix it
The instruction
mulq
in this code is an x86 64-bit instruction. All the parameters are 64-bit values and can't fit in 32-bit registers (when compiling for a 32-bit x86 platform) – Michael Petch