S/390 Add vector scalar instruction support.

S/390 Add vector scalar instruction support.

With this patch GCC makes use of the vector instruction which are
available in single element mode.  By using these instructions scalar
double operations can use 32 registers.

gcc/
	* config/s390/s390-modes.def: Add new modes CCVEQ, CCVFH, and
	CCVFHE.
	* config/s390/s390.c (s390_match_ccmode_set): Handle new modes.
	(s390_select_ccmode): Likewise.
	(s390_canonicalize_comparison): Swap operands if necessary.
	(s390_expand_vec_compare_scalar): Expand DFmode compare using
	single element vector instructions.
	(s390_emit_compare): Call s390_expand_vec_compare_scalar.
	(s390_branch_condition_mask): Generate CC masks for the new modes.
	* config/s390/s390.md (v0, vf, vd): New mode attributes.
	(VFCMP, asm_fcmp, insn_cmp): New mode iterator and attributes.
	(*vec_cmp<insn_cmp>df_cconly, *fixuns_truncdfdi2_z13)
	(*fix_trunc<BFP:mode><GPR:mode>2_bfp, *floatunsdidf2_z13)
	(*floatuns<GPR:mode><FP:mode>2, *extendsfdf2_z13)
	(*extend<DSF:mode><BFP:mode>2): New insn definition.
	(fix_trunc<BFP:mode><GPR:mode>2_bfp, loatuns<GPR:mode><FP:mode>2)
	(extend<DSF:mode><BFP:mode>2): Turn into expander.
	(floatdi<mode>2, truncdfsf2, add<mode>3, sub<mode>3, mul<mode>3)
	(div<mode>3, *neg<mode>2, *abs<mode>2, *negabs<mode>2)
	(sqrt<mode>2): Add vector instruction.

gcc/testsuite/
	* gcc.target/s390/vector/vec-scalar-cmp-1.c: New test.

From-SVN: r223397