fixup! tcg-s390: Properly allocate a stack frame.
tcg-s390: Remove useless preprocessor conditions

We only support 64-bit code generation for s390x.
Don't clutter the code with ifdefs that suggest otherwise.

Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-s390: Implement add2/sub2 opcodes

Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-s390: Implement mulu2_i64 opcode

Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-s390: Implement movcond opcodes

Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-s390: Implement deposit opcodes

Signed-off-by: Richard Henderson <rth@twiddle.net>