* config/sparc/sparc.c (sparc_override_options): If not
TARGET_FPU, turn off TARGET_VIS.
* config/sparc/sparc.h (TARGET_SWITCHES): Add no-vis.
(LEGITIMATE_CONSTANT_P): Allow SF/DF mode zero when TARGET_VIS.
* config/sparc/sparc.md (movsi_insn): Use fzeros not fzero.
(movdi_insn_sp64): Add VIS fzero alternative.
(clear_sf, clear_df): New VIS patterns.
(movsf, movdf expanders): Allow fp_zero_operand flat out when
TARGET_VIS.
(one_cmpldi2_sp64): Provide new fnot1 VIS alternative.
From-SVN: r21996
