// Prepare for calling back into C. On 32-bit x86, leave space for
// the arguments and set up the GOT pointer; on AMD64 Windows, leave
// the `shadow space' for the called-function's arguments. Also,
// forcibly align the stack pointer to a 16-byte boundary.
# if CPUFAM_X86
// Prepare for calling back into C. On 32-bit x86, leave space for
// the arguments and set up the GOT pointer; on AMD64 Windows, leave
// the `shadow space' for the called-function's arguments. Also,
// forcibly align the stack pointer to a 16-byte boundary.
# if CPUFAM_X86