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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
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