Unable to build on powerpc64 or powerpc64le with dyncall

[ffontaine]

Build with powerpc64 and powerpc64le with dyncall fails on:

In file included from dyncall_callback.c:35:0:
dyncall_callback_ppc64.c: In function 'dcbNewCallback':
dyncall_callback_ppc64.c:42:13: warning: implicit declaration of function 'dcAllocWX' [-Wimplicit-function-declaration]
int err = dcAllocWX(sizeof(DCCallback), (void**) &pcb);
^~~~~~~~~
dyncall_callback_ppc64.c: In function 'dcbFreeCallback':
dyncall_callback_ppc64.c:53:3: warning: implicit declaration of function 'dcFreeWX' [-Wimplicit-function-declaration]
dcFreeWX(pcb, sizeof(DCCallback));
^~~~~~~~
dyncall_callback_ppc64.S: Assembler messages:
dyncall_callback_ppc64.S:180: Error: operand out of range (3 is not between 0 and 1)

For more details, see:

• http://autobuild.buildroot.org/results/97b53a74d9847c07f26178daeb1daff3b6c24813
• http://autobuild.buildroot.org/results/c35ac4bbc5fb04aabf5a719eddeedf55f7f1f4eb

The issue seems similar to #222.

[ffontaine]

I'm closing this issue as I can't reproduce it with moarvm 2021.10