[binutils-gdb] RISC-V: NaN-box FP values smaller than an FP register.

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*** TEST RESULTS FOR COMMIT 3399f1b3030c3419859f1230bc66a981154d176d ***

Author: Jim Wilson <jimw@sifive.com>
Branch: master
Commit: 3399f1b3030c3419859f1230bc66a981154d176d

RISC-V: NaN-box FP values smaller than an FP register.

The hardware requires that values in FP registers be NaN-boxed, so we must
extend them with 1's instead of 0's as we do for integer values.

	gdb/
	* riscv-tdep.c (riscv_push_dummy_call) <in_reg>: Check for value in
	FP reg smaller than FP reg size, and fill with -1 instead of 0.