[Bug target/53513] [SH] Add support for fschg and fpchg insns and improve fenv support

["olegendo at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53513

--- Comment #31 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Thu Oct 16 10:58:36 2014
New Revision: 216307

URL: https://gcc.gnu.org/viewcvs?rev=216307&root=gcc&view=rev
Log:
gcc/
    PR target/53513
    * config/sh/sh-protos.h (emit_sf_insn, emit_df_insn, expand_sf_unop,
    expand_sf_binop, expand_df_unop, expand_df_binop): Remove.

    * config/sh/sh.c (sh_emit_set_t_insn): Adjust generated insn pattern
    to match fp insn patterns.
    (calc_live_regs): Add FPSCR_MODES_REG and FPSCR_STAT_REG to the ignore
    list.
    (emit_sf_insn, emit_df_insn, expand_sf_unop, expand_sf_binop,
    expand_df_unop, expand_df_binop): Remove.
    (sh_conditional_register_usage): Mark FPSCR_MODES_REG and
    FPSCR_STAT_REG as not call clobbered.
    (sh_emit_mode_set): Emit fpscr store-modify-load sequence instead of
    invoking fpscr_set_from_mem.

    * config/sh/sh.h (MAX_REGISTER_NAME_LENGTH): Increase to 6.
    (SH_REGISTER_NAMES_INITIALIZER): Add names for FPSCR_MODES_REG and
    FPSCR_STAT_REG.
    (REGISTER_NAMES): Adjust.
    (SPECIAL_REGISTER_P): Add FPSCR_MODES_REG and FPSCR_STAT_REG.
    (FIRST_PSEUDO_REGISTER): Increase to 156.
    (DWARF_FRAME_REGISTERS): Define as 153 to keep the original value.
    (FIXED_REGISTERS, CALL_USED_REGISTERS): Add FPSCR_MODES_REG and
    FPSCR_STAT_REG.
    (REG_CLASS_CONTENTS): Adjust ALL_REGS bit mask to include
    FPSCR_MODES_REG and FPSCR_STAT_REG.
    (REG_ALLOC_ORDER): Add FPSCR_MODES_REG and FPSCR_STAT_REG.

    * config/sh/sh.md (FPSCR_MODES_REG, FPSCR_STAT_REG, FPSCR_PR,
    FPSCR_SZ): Add new constants.
    (UNSPECV_FPSCR_MODES, UNSPECV_FPSCR_STAT): Add new unspecv constants.

    (movpsi): Use TARGET_FPU_ANY condition, invoke gen_fpu_switch.
    (fpu_switch): Add use and set of FPSCR_STAT_REG and FPSCR_MODES_REG.
    Use TARGET_FPU_ANY condition.
    (fpu_switch peephole2): Remove.
    (fpu_switch split): Use simple_mem_operand to capture the mem and
    adjust split implementation.
    (extend_psi_si, truncate_si_psi): New insns.
    (toggle_sz, toggle_pr): Use FPSCR_SZ, FPSCR_PR constants.  Add
    set of FPSCR_MODES_REG.

    (push_e, push_4, pop_e, pop_4, movdf_i4, reload_indf__frn, movsf_ie,
    reload_insf__frn, force_mode_for_call, calli, calli_tbr_rel,
    calli_pcrel, call_pcrel, call_compact, call_compact_rettramp,
    call_valuei, call_valuei_tbr_rel, call_valuei_pcrel, call_value_pcrel,
    call_value_compact, call_value_compact_rettramp, call,
    call_pop_compact, call_pop_compact_rettramp, call_value, sibcalli,
    sibcalli_pcrel, sibcalli_thunk, sibcall_pcrel, sibcall_compact,
    sibcall, sibcall_valuei, sibcall_valuei_pcrel, sibcall_value_pcrel,
    sibcall_value_compact, sibcall_value, call_value_pop_compact,
    call_value_pop_compact_rettramp, various unnamed splits):
    Replace use of FPSCR_REG with use of FPSCR_MODES_REG.  Adjust gen_*
    function uses.

    (floatsisf2_i4, *floatsisf2_ie): Merge into floatsisf2_i4.
    (fix_truncsfsi2_i4, *fixsfsi): Merge into fix_truncsfsi2_i4.
    (cmpgtsf_t, cmpgtsf_t_i4): Merge into cmpgtsf_t.
    (cmpeqsf_t, cmpeqsf_t_i4): Merge into cmpeqsf_t.
    (ieee_ccmpeqsf_t, *ieee_ccmpeqsf_t_4): Merge into ieee_ccmpeqsf_t.

    (udivsi3_i4, divsi3_i4, addsf3_i, subsf3_i, mulsf3_i, fmasf4_i,
    *fmasf4, divsf3_i, floatsisf2_i4, fix_truncsfsi2_i4, cmpgtsf_t,
    cmpeqsf_t, ieee_ccmpeqsf_t, sqrtsf2_i, rsqrtsf2, fsca, adddf3_i,
    subdf3_i, muldf3_i, divdf3_i, floatsidf2_i, fix_truncdfsi2_i,
    cmpgtdf_t, cmpeqdf_t, *ieee_ccmpeqdf_t, sqrtdf2_i, extendsfdf2_i4,
    truncdfsf2_i4): Replace use of FPSCR_REG with clobber of FPSCR_STAT_REG
    and use of FPSCR_MODES_REG.  Adjust gen_* function uses.

gcc/testsuite/
    PR target/53513
    * gcc.target/sh/pr54680.c: Adjust matching of lds insn.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/sh/sh-protos.h
    trunk/gcc/config/sh/sh.c
    trunk/gcc/config/sh/sh.h
    trunk/gcc/config/sh/sh.md
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/sh/pr54680.c