[PATCH] ARM half-precision floating point, part 9/8 (HF mode attribute)

[Sandra Loosemore]

Yes, the subject line is right; this is a new piece.

It was previously noted that the test cases I posted in part 8 did not include 
any tests for __attribute__((mode(HF))) syntax.  Well, the trouble was that 
wasn't supported at all.  This patch adds both the support and the test cases. 
I verified that making TARGET_SCALAR_MODE_SUPPORTED_P return true for HFmode did 
not cause any test failures elsewhere.

OK to commit?

-Sandra

2009-05-18  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* config/arm/arm.c (TARGET_SCALAR_MODE_SUPPORTED_P): Redefine.
	(arm_scalar_mode_supported_p): New function.

	gcc/testsuite/
	* gcc.target/arm/fp16-compile-none-2.c: New.
	* gcc.target/arm/fp16-compile-ieee-12.c: New.
	* gcc.target/arm/fp16-compile-alt-12.c: New.
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