[PATCH] aarch64 sim FP to unsigned integer conversion fix

[Jim Wilson]

FP to unsigned integer conversions are being truncated to the signed
INT_MAX and LONG_MAX when they should be truncated to UINT_MAX and
ULONG_MAX.  This requires adding a bunch of new variables, as this
truncation happens inside a macro that uses token pasting to create
variable names.

The testcase fails without the patch and works with the patch.  GCC C
testsuite failures drop from 2568 to 2538 with the patch.

Jim
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