hppa-linux: broken integer support

[danglin44]

The last version to successfully build on Debian hppa-linux was v0.94.

Commit aa05f0f exposed the following integer failures:

Test Summary Report

t/type_sint64.t (Wstat: 256 (exited 1) Tests: 3 Failed: 1)
Failed test: 3
Non-zero exit status: 1
t/type_uint64.t (Wstat: 256 (exited 1) Tests: 3 Failed: 1)
Failed test: 3
Non-zero exit status: 1
Files=63, Tests=311, 120 wallclock secs ( 1.31 usr 1.06 sys + 95.79 cusr 19.74 csys = 117.90 CPU)
Result: FAIL
Failed 2/63 test programs. 2/311 subtests failed.

    # Failed test at t/type_sint64.t line 127.
    # +--------------+----+-------+
    # | GOT          | OP | CHECK |
    # +--------------+----+-------+
    # | -90371962288 | eq | -22   |
    # +--------------+----+-------+
# Failed test 'argument'
# at t/type_sint64.t line 129.
    # Failed test at t/type_sint64.t line 135.
    # +--------------+----+-------+
    # | GOT          | OP | CHECK |
    # +--------------+----+-------+
    # | -90371962288 | eq | -22   |
    # +--------------+----+-------+
# Failed test 'return value'
# at t/type_sint64.t line 136.

(gdb) p/x (long long)-22
$2 = 0xffffffffffffffea
(gdb) p/x -90371962288
$3 = 0xffffffeaf5694a50

Argument and return value access alignment seem wrong.

Things got worse with commit 066068a. See build logs here:
https://buildd.debian.org/status/logs.php?pkg=libffi-platypus-perl&arch=hppa
The only successful builds didn't run the test suite.

The attached patch gets us back to the type_sint64.t and type_uint64.t fails.

hppa-fix.txt

hppa-linux is 32-bit big endian. The stack grows up. 64-bit ints are double word aligned.