rs6000.h (UNITS_PER_WORD): Use TARGET_32BIT, not TARGET_POWREPC64.

rs6000.h (UNITS_PER_WORD): Use TARGET_32BIT, not TARGET_POWREPC64.

	* config/rs6000/rs6000.h (UNITS_PER_WORD): Use TARGET_32BIT, not
	TARGET_POWREPC64.
	(UNITS_PER_GPR_WORD): Define.
	(HARD_REGNO_NREGS): Use UNITS_PER_GPR_WORD.
	(HARD_REGNO_CALL_PART_CLOBBERED): Define.
	(HARD_REGNO_MODE_OK): Use UNITS_PER_GPR_WORD.
	(CLASS_MAX_NREGS): Use UNITS_PER_GPR_WORD.
	* config/rs6000/rs6000.c (function_arg): Generate PARALLEL for
	DFmode and DImode in 32-bit ABI / 64-bit computation mode.
	(rs6000_emit_prologue): Select reg_mode and reg_size using
	TARGET_32BIT, not TARGET_POWERPC64.
	(rs6000_function_value): Generate PARALLEL for DImode in 32-bit
	ABI / 64-bit computation mode

Co-Authored-By: David Edelsohn <edelsohn@gnu.org>
From-SVN: r72851