rs6000.h (ALTIVEC_VECTOR_MODE): Add IEEE 128-bit floating point modes that can go...

rs6000.h (ALTIVEC_VECTOR_MODE): Add IEEE 128-bit floating point modes that can go in vector registers.

2015-10-29  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000.h (ALTIVEC_VECTOR_MODE): Add IEEE 128-bit
	floating point modes that can go in vector registers.
	(MODES_TIEABLE_P): Move tests for vector modes before tests for
	scalar floating point, so that IEEE 128-bit floating point that
	can go in vector registers bind with vectors and not FP.
	(struct rs6000_args): Add libcall field.

	* config/rs6000/rs6000.opt (-mfloat128-*): Delete -mfloat128-none
	and -mfloat128-software switches.  Replace them with a binary
	-mfloat128 switch.
	(-mfloat128): Likewise.

	* config/rs6000/rs6000.c (rs6000_hard_regno_mode_ok): Allow
	128-bit floating point types in GPRs, even if the appropriate
	option enabling the type was not used.
	(rs6000_debug_reg_global): Remove -mfloat128-{software,none}
	debugging.
	(rs6000_setup_reg_addr_masks): Do not allow pre-increment and
	pre-decrement on IEEE 128-bit floating point values.
	(rs6000_init_hard_regno_mode_ok): Change test for whether TFmode
	is IEEE 128-bit floating point.
	(rs6000_init_hard_regno_mode_ok): Add reload handlers for IEEE
	128-bit floating point types that can go in vector registers.
	(rs6000_option_override_internal): Change -mfloat128-none and
	-mfloat128-software to -mfloat128, and move code to be near other
	VSX option handling.
	(rs6000_option_override_internal): Disable -mfloat128 if we don't
	have the Altivec ABI.
	(rs6000_init_builtins): Don't make TFmode use either IFmode or
	KFmode floating point nodes. Instead, have three separate nodes.
	(rs6000_scalar_mode_supported_p): Add support for IFmode to allow
	eventually moving the long double default to IEEE 128-bit floating
	point.
	(rs6000_opt_masks): Add -mfloat128.
	(struct rs6000_opt_var): Fix typo in comment.
	(init_cumulative_args): Initialize libcall field in
	CUMULATIVE_ARGS.
	(rs6000_function_arg): Treat library functions as if they had
	prototypes to prevent IEEE 128-bit support functions from passing
	arguments in both GPRs and vector registers.
	(rs6000_arg_partial_bytes): Likewise.

	* config/rs6000/rs6000-cpus.def (POWERPC_MASKS): Add -mfloat128 as
	an option that can be turned on via -mcpu=<xxx>.

	* config/rs6000/rs6000-opts.h (enum float128_type_t): Delete, no
	longer used.

	* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): Define
	__FLOAT128__ if -mfloat128. Define __LONG_DOUBLE_IEEE128__ if long
	double is IEEE 128-bit. Define __LONG_DOUBLE_IBM128__ if long
	double is IBM extended double.

	* config/rs6000/predicates.md (reg_or_indexed_operand): Allow
	SUBREGs.

From-SVN: r229545