* check/range.ok, check/range.tst: New test case designed
to catch incorrect code generation, usually due to incorrect
test of immediate size. The test checks a large amount of
encodings in "power of two" boundaries. This test exorcises
a significant amount of code paths that was previously not
tested.
* check/Makefile.am: Add range test to make check target.
* lib/jit_aarch64-cpu.c: Correct wrong address calculation
for stxi_c, stxi_s, stxi_i and stxi_l when the offset is
too large.
* lib/jit_mips-fpu.c: Correct wrong size test to check if
an immediate can be encoded in a float or double store.
* lib/jit_s390x-cpu.c: Correct inverted encoding to stxi_s
when the offset cannot be encoded, and fallbacks to an
alternate encoding in 2 instructions.
