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The LEON5 can often dual issue instructions from the same 64-bit aligned
double word if there are no data dependencies. Add scheduling information
to avoid scheduling unpairable instructions back-to-back.
gcc/ChangeLog:
* config/sparc/sparc-opts.h (enum sparc_processor_type): Add LEON5
* config/sparc/sparc.c (struct processor_costs): Add LEON5 costs
(leon5_adjust_cost): Increase cost of store with data dependency
on ALU instruction and FPU anti-dependencies.
(sparc_option_override): Add LEON5 costs
(sparc_adjust_cost): Add LEON5 cost adjustments
* config/sparc/sparc.h: Add LEON5
* config/sparc/sparc.md: Include LEON5 scheduling information
* config/sparc/sparc.opt: Add LEON5
* doc/invoke.texi: Add LEON5
* config/sparc/leon5.md: New file.
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From-SVN: r279813
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* config/sparc/sparc-opts.h (enum processor_type): Rename to...
(enum sparc_processor_type): ...this.
(enum sparc_code_model_type): New enumeration type.
(enum sparc_memory_model_type): Tweak comments.
* config/sparc/sparc.opt (mcpu): Adjust to above renaming.
(mtune): Likewise.
(mcmodel): Use sparc_code_model enumeration and variable.
(sparc_code_model): New enumeration.
(mdebug): Add Undocumented marker.
* config/sparc/sparc.h (enum cmodel): Delete.
(sparc_cmodel): Likewise.
(TARGET_CM_MEDLOW): Adjust to above renaming.
(TARGET_CM_MEDMID): Likewise.
(TARGET_CM_MEDANY): Likewise.
(TARGET_CM_EMBMEDANY): Likewise.
* config/sparc/sparc.c (sparc_cmodel): Delete.
(sparc_option_override): Remove string/value mapping support for the
code model. Move code and memory model support to after the handling
of target flags. Do private machine setup last.
(sparc_emit_set_symbolic_const64): Use sparc_code_model.
(sparc_legitimize_reload_address): Likewise.
(sparc_output_mi_thunk): Likewise.
* config/sparc/sparc.md (cpu): Adjust comment to above renaming.
From-SVN: r269232
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From-SVN: r267494
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From-SVN: r256169
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This patch serie adds support for the SPARC M8 processor to GCC.
The SPARC M8 processor implements the Oracle SPARC Architecture 2017.
- bmask* instructions are put in their own instruction type. It makes
little sense to have them in the same category than array
instructions.
- Similarly, VIS compare instructions are put in their own instruction
type. This is to better accommodate subtypes, which are not quite
the same than the subtypes of `visl' instructions.
- The introduction of a new `subtype' insn attribute in sparc.md
avoids the need for adjusting the instruction scheduler DFAs for
previous cpu models every time a new cpu is introduced.
- The full set of SPARC instructions used in sparc.md, and their
position in the type/subtype hierarchy, is documented in a comment.
This eases the modification of the DFA schedulers, and the addition
of new cpus.
- The M7 DFA scheduler is reworked:
+ To use the new type/subtype hierarchy.
+ The v3pipe insn attribute is no longer needed.
+ More accurate latencies for instructions.
+ The C4 core pipeline is documented in a comment in niagara7.md.
- Support for -mcpu=m8 (we are thus suggesting to abandon the niagaraN
denomination for M8 and later processors.)
- Support for a new VIS level, VIS4B, covering the new VIS
instructions introduced in OSA2017 and implemented in the M8. Also
built-ins.
- A M8 DFA scheduler:
+ Also based on the new type/subtype hierarchy.
+ The functional units in the C5 core are explicitly documented in a
comment in m8.md.
gcc/ChangeLog:
* config/sparc/m8.md: New file.
* config/sparc/sparc.md: Include m8.md.
* config/sparc/sparc.opt: New option -mvis4b.
* config/sparc/sparc.c (dump_target_flag_bits): Handle MASK_VIS4B.
(sparc_option_override): Handle VIS4B.
(enum sparc_builtins): Define
SPARC_BUILTIN_DICTUNPACK{8,16,32},
SPARC_BUILTIN_FPCMP{LE,GT,EQ,NE}{8,16,32}SHL,
SPARC_BUILTIN_FPCMPU{LE,GT}{8,16,32}SHL,
SPARC_BUILTIN_FPCMPDE{8,16,32}SHL and
SPARC_BUILTIN_FPCMPUR{8,16,32}SHL.
(check_constant_argument): New function.
(sparc_vis_init_builtins): Define builtins
__builtin_vis_dictunpack{8,16,32},
__builtin_vis_fpcmp{le,gt,eq,ne}{8,16,32}shl,
__builtin_vis_fpcmpu{le,gt}{8,16,32}shl,
__builtin_vis_fpcmpde{8,16,32}shl and
__builtin_vis_fpcmpur{8,16,32}shl.
(sparc_expand_builtin): Check that the constant operands to
__builtin_vis_fpcmp*shl and _builtin_vis_dictunpack* are indeed
constant and in range.
* config/sparc/sparc-c.c (sparc_target_macros): Handle
TARGET_VIS4B.
* config/sparc/sparc.h (SPARC_IMM2_P): Define.
(SPARC_IMM5_P): Likewise.
* config/sparc/sparc.md (cpu_feature): Add new feagure "vis4b".
(enabled): Handle vis4b.
(UNSPEC_DICTUNPACK): New unspec.
(UNSPEC_FPCMPSHL): Likewise.
(UNSPEC_FPUCMPSHL): Likewise.
(UNSPEC_FPCMPDESHL): Likewise.
(UNSPEC_FPCMPURSHL): Likewise.
(cpu_feature): New CPU feature `vis4b'.
(dictunpack{8,16,32}): New insns.
(FPCSMODE): New mode iterator.
(fpcscond): New code iterator.
(fpcsucond): Likewise.
(fpcmp{le,gt,eq,ne}{8,16,32}{si,di}shl): New insns.
(fpcmpu{le,gt}{8,16,32}{si,di}shl): Likewise.
(fpcmpde{8,16,32}{si,di}shl): Likewise.
(fpcmpur{8,16,32}{si,di}shl): Likewise.
* config/sparc/constraints.md: Define constraints `q' for unsigned
2-bit integer constants and `t' for unsigned 5-bit integer
constants.
* config/sparc/predicates.md (imm5_operand_dictunpack8): New
predicate.
(imm5_operand_dictunpack16): Likewise.
(imm5_operand_dictunpack32): Likewise.
(imm2_operand): Likewise.
* doc/invoke.texi (SPARC Options): Document -mvis4b.
* doc/extend.texi (SPARC VIS Built-in Functions): Document the
ditunpack* and fpcmp*shl builtins.
* config.gcc: Handle m8 in --with-{cpu,tune} options.
* config.in: Add HAVE_AS_SPARC6 define.
* config/sparc/driver-sparc.c (cpu_names): Add entry for the SPARC
M8.
* config/sparc/sol2.h (CPP_CPU64_DEFAULT_SPEC): Define for
TARGET_CPU_m8.
(ASM_CPU32_DEFAUILT_SPEC): Likewise.
(CPP_CPU_SPEC): Handle m8.
(ASM_CPU_SPEC): Likewise.
* config/sparc/sparc-opts.h (enum processor_type): Add
PROCESSOR_M8.
* config/sparc/sparc.c (m8_costs): New struct.
(sparc_option_override): Handle TARGET_CPU_m8.
(sparc32_initialize_trampoline): Likewise.
(sparc64_initialize_trampoline): Likewise.
(sparc_issue_rate): Likewise.
(sparc_register_move_cost): Likewise.
* config/sparc/sparc.h (TARGET_CPU_m8): Define.
(CPP_CPU64_DEFAULT_SPEC): Define for M8.
(ASM_CPU64_DEFAULT_SPEC): Likewise.
(CPP_CPU_SPEC): Handle M8.
(ASM_CPU_SPEC): Likewise.
(AS_M8_FLAG): Define.
* config/sparc/sparc.md: Add m8 to the cpu attribute.
* config/sparc/sparc.opt: New option -mcpu=m8 for sparc targets.
* configure.ac (HAVE_AS_SPARC6): Check for assembler support for
M8 instructions.
* configure: Regenerate.
* doc/invoke.texi (SPARC Options): Document -mcpu=m8 and
-mtune=m8.
* config/sparc/niagara7.md: Rework the DFA scheduler to use insn
subtypes.
* config/sparc/sparc.md: Remove the `v3pipe' insn attribute.
("*movdi_insn_sp32"): Do not set v3pipe.
("*movsi_insn"): Likewise.
("*movdi_insn_sp64"): Likewise.
("*movsf_insn"): Likewise.
("*movdf_insn_sp32"): Likewise.
("*movdf_insn_sp64"): Likewise.
("*zero_extendsidi2_insn_sp64"): Likewise.
("*sign_extendsidi2_insn"): Likewise.
("*mov<VM32:mode>_insn"): Likewise.
("*mov<VM64:mode>_insn_sp64"): Likewise.
("*mov<VM64:mode>_insn_sp32"): Likewise.
("<plusminus_insn><VADDSUB:mode>3"): Likewise.
("<vlop:code><VL:mode>3"): Likewise.
("*not_<vlop:code><VL:mode>3"): Likewise.
("*nand<VL:mode>_vis"): Likewise.
("*<vlnotop:code>_not1<VL:mode>_vis"): Likewise.
("*<vlnotop:code>_not2<VL:mode>_vis"): Likewise.
("one_cmpl<VL:mode>2"): Likewise.
("faligndata<VM64:mode>_vis"): Likewise.
("alignaddrsi_vis"): Likewise.
("alignaddrdi_vis"): Likweise.
("alignaddrlsi_vis"): Likewise.
("alignaddrldi_vis"): Likewise.
("fcmp<gcond:code><GCM:gcm_name><P:mode>_vis"): Likewise.
("bmaskdi_vis"): Likewise.
("bmasksi_vis"): Likewise.
("bshuffle<VM64:mode>_vis"): Likewise.
("cmask8<P:mode>_vis"): Likewise.
("cmask16<P:mode>_vis"): Likewise.
("cmask32<P:mode>_vis"): Likewise.
("pdistn<P:mode>_vis"): Likewise.
("<vis3_addsub_ss_patname><VASS:mode>3"): Likewise.
* config/sparc/sparc.md ("subtype"): New insn attribute.
("*wrgsr_sp64"): Set insn subtype.
("*rdgsr_sp64"): Likewise.
("alignaddrsi_vis"): Likewise.
("alignaddrdi_vis"): Likewise.
("alignaddrlsi_vis"): Likewise.
("alignaddrldi_vis"): Likewise.
("<plusminus_insn><VADDSUB:mode>3"): Likewise.
("fexpand_vis"): Likewise.
("fpmerge_vis"): Likewise.
("faligndata<VM64:mode>_vis"): Likewise.
("bshuffle<VM64:mode>_vis"): Likewise.
("cmask8<P:mode>_vis"): Likewise.
("cmask16<P:mode>_vis"): Likewise.
("cmask32<P:mode>_vis"): Likewise.
("fchksm16_vis"): Likewise.
("v<vis3_shift_patname><GCM:mode>3"): Likewise.
("fmean16_vis"): Likewise.
("fp<plusminus_insn>64_vis"): Likewise.
("<plusminus_insn>v8qi3"): Likewise.
("<vis3_addsub_ss_patname><VASS:mode>3"): Likewise.
("<vis4_minmax_patname><VMMAX:mode>3"): Likewise.
("<vis4_uminmax_patname><VMMAX:mode>3"): Likewise.
("<vis3_addsub_ss_patname>v8qi3"): Likewise.
("<vis4_addsub_us_patname><VAUS:mode>3"): Likewise.
("*movqi_insn"): Likewise.
("*movhi_insn"): Likewise.
("*movsi_insn"): Likewise.
("movsi_pic_gotdata_op"): Likewise.
("*movdi_insn_sp32"): Likewise.
("*movdi_insn_sp64"): Likewise.
("movdi_pic_gotdata_op"): Likewise.
("*movsf_insn"): Likewise.
("*movdf_insn_sp32"): Likewise.
("*movdf_insn_sp64"): Likewise.
("*zero_extendhisi2_insn"): Likewise.
("*zero_extendqihi2_insn"): Likewise.
("*zero_extendqisi2_insn"): Likewise.
("*zero_extendqidi2_insn"): Likewise.
("*zero_extendhidi2_insn"): Likewise.
("*zero_extendsidi2_insn_sp64"): Likewise.
("ldfsr"): Likewise.
("prefetch_64"): Likewise.
("prefetch_32"): Likewise.
("tie_ld32"): Likewise.
("tie_ld64"): Likewise.
("*tldo_ldub_sp32"): Likewise.
("*tldo_ldub1_sp32"): Likewise.
("*tldo_ldub2_sp32"): Likewise.
("*tldo_ldub_sp64"): Likewise.
("*tldo_ldub1_sp64"): Likewise.
("*tldo_ldub2_sp64"): Likewise.
("*tldo_ldub3_sp64"): Likewise.
("*tldo_lduh_sp32"): Likewise.
("*tldo_lduh1_sp32"): Likewise.
("*tldo_lduh_sp64"): Likewise.
("*tldo_lduh1_sp64"): Likewise.
("*tldo_lduh2_sp64"): Likewise.
("*tldo_lduw_sp32"): Likewise.
("*tldo_lduw_sp64"): Likewise.
("*tldo_lduw1_sp64"): Likewise.
("*tldo_ldx_sp64"): Likewise.
("*mov<VM32:mode>_insn"): Likewise.
("*mov<VM64:mode>_insn_sp64"): Likewise.
("*mov<VM64:mode>_insn_sp32"): Likewise.
* config/sparc/sparc.md ("type"): New insn type viscmp.
("fcmp<gcond:code><GCM:gcm_name><P:mode>_vis"): Set insn type to
viscmp.
("fpcmp<gcond:code>8<P:mode>_vis"): Likewise.
("fucmp<gcond:code>8<P:mode>_vis"): Likewise.
("fpcmpu<gcond:code><GCM:gcm_name><P:mode>_vis"): Likewise.
* config/sparc/niagara7.md ("n7_vis_logical_v3pipe"): Handle
viscmp.
("n7_vis_logical_11cycle"): Likewise.
* config/sparc/niagara4.md ("n4_vis_logical"): Likewise.
* config/sparc/niagara2.md ("niag3_vis": Likewise.
* config/sparc/niagara.md ("niag_vis"): Likewise.
* config/sparc/ultra3.md ("us3_fga"): Likewise.
* config/sparc/ultra1_2.md ("us1_fga_double"): Likewise.
* config/sparc/sparc.md: New instruction type `bmask'.
(bmaskdi_vis): Use the `bmask' type.
(bmasksi_vis): Likewise.
* config/sparc/ultra3.md (us3_array): Likewise.
* config/sparc/niagara7.md (n7_array): Likewise.
* config/sparc/niagara4.md (n4_array): Likewise.
* config/sparc/niagara2.md (niag2_vis): Likewise.
(niag3_vis): Likewise.
* config/sparc/niagara.md (niag_vis): Likewise.
gcc/testsuite/ChangeLog:
* gcc.target/sparc/dictunpack.c: New file.
* gcc.target/sparc/fpcmpdeshl.c: Likewise.
* gcc.target/sparc/fpcmpshl.c: Likewise.
* gcc.target/sparc/fpcmpurshl.c: Likewise.
* gcc.target/sparc/fpcmpushl.c: Likewise.
From-SVN: r250049
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From-SVN: r243994
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gcc/ChangeLog:
2016-06-06 Jose E. Marchesi <jose.marchesi@oracle.com>
* config/sparc/sparc.md (cpu): Add niagara7 cpu type.
Include the M7 SPARC DFA scheduler.
New attribute v3pipe.
Annotate insns with v3pipe where appropriate.
Define cpu_feature vis4.
Add lzd instruction type and set it on clzdi_sp64 and clzsi_sp64.
Add (V8QI "8") to vbits.
Add insns {add,sub}v8qi3
Add insns ss{add,sub}v8qi3
Add insns us{add,sub}{v8qi,v4hi}3
Add insns {min,max}{v8qi,v4hi,v2si}3
Add insns {minu,maxu}{v8qi,v4hi,v2si}3
Add insns fpcmp{le,gt,ule,ug,ule,ugt}{8,16,32}_vis.
* config/sparc/niagara4.md: Add a comment explaining the
discrepancy between the documented latenty numbers and the
implemented ones.
* config/sparc/niagara7.md: New file.
* configure.ac (HAVE_AS_SPARC5_VIS4): Define if the assembler
supports SPARC5 and VIS 4.0 instructions.
* configure: Regenerate.
* config.in: Likewise.
* config.gcc: niagara7 is a supported cpu in sparc*-*-* targets.
* config/sparc/sol2.h (ASM_CPU32_DEFAUILT_SPEC): Set for
TARGET_CPU_niagara7.
(ASM_CPU64_DEFAULT_SPEC): Likewise.
(CPP_CPU_SPEC): Handle niagara7.
(ASM_CPU_SPEC): Likewise.
* config/sparc/sparc-opts.h (processor_type): Add
PROCESSOR_NIAGARA7.
(mvis4): New option.
* config/sparc/sparc.h (TARGET_CPU_niagara7): Define.
(AS_NIAGARA7_FLAG): Define.
(ASM_CPU64_DEFAULT_SPEC): Set for niagara7.
(CPP_CPU64_DEFAULT_SPEC): Likewise.
(CPP_CPU_SPEC): Handle niagara7.
(ASM_CPU_SPEC): Likewise.
* config/sparc/sparc.c (niagara7_costs): Define.
(sparc_option_override): Handle niagara7 and adjust cache-related
parameters with better values for niagara cpus. Also support VIS4.
(sparc32_initialize_trampoline): Likewise.
(sparc_use_sched_lookahead): Likewise.
(sparc_issue_rate): Likewise.
(sparc_register_move_cost): Likewise.
(dump_target_flag_bits): Support VIS4.
(sparc_vis_init_builtins): Likewise.
(sparc_builtins): Likewise.
* config/sparc/sparc-c.c (sparc_target_macros): Define __VIS__ for
VIS4 4.0.
* config/sparc/driver-sparc.c (cpu_names): Add SPARC-M7 and
UltraSparc M7.
* config/sparc/sparc.opt (sparc_processor_type): New value
niagara7.
* config/sparc/visintrin.h (__attribute__): Prototypes for the
VIS4 builtins.
* doc/invoke.texi (SPARC Options): Document -mcpu=niagara7 and
-mvis4.
* doc/extend.texi (SPARC VIS Built-in Functions): Document the
VIS4 builtins.
gcc/testsuite/ChangeLog:
2016-06-06 Jose E. Marchesi <jose.marchesi@oracle.com>
* gcc.target/sparc/vis4misc.c: New file.
* gcc.target/sparc/fpcmp.c: Likewise.
* gcc.target/sparc/fpcmpu.c: Likewise.
From-SVN: r237132
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From-SVN: r232055
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From-SVN: r219188
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2014-10-24 Daniel Hellstrom <daniel@gaisler.com>
* config.gcc (sparc*-*-*): Accept mcpu=leon3v7 processor.
* doc/invoke.texi (SPARC options): Add mcpu=leon3v7 comment.
* config/sparc/leon.md (leon3_load, leon_store, leon_fp_*): Handle
leon3v7 as leon3.
* config/sparc/sparc-opts.h (enum processor_type): Add LEON3V7.
* config/sparc/sparc.c (sparc_option_override): Add leon3v7 support.
* config/sparc/sparc.h (TARGET_CPU_leon3v7): New define.
* config/sparc/sparc.md (cpu): Add leon3v7.
* config/sparc/sparc.opt (enum processor_type): Add leon3v7.
From-SVN: r216666
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From-SVN: r206289
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* config.gcc (sparc*-*-*): Accept leon3 processor.
(sparc-leon*-*): Merge with sparc*-*-* and add leon3 support.
* doc/invoke.texi (SPARC Options): Adjust -mfix-ut699 entry.
* config/sparc/sparc-opts.h (enum processor_type): Add PROCESSOR_LEON3.
* config/sparc/sparc.opt (enum processor_type): Add leon3.
(mfix-ut699): Adjust comment.
* config/sparc/sparc.h (TARGET_CPU_leon3): New define.
(CPP_CPU32_DEFAULT_SPEC): Add leon3 support.
(CPP_CPU_SPEC): Likewise.
(ASM_CPU_SPEC): Likewise.
* config/sparc/sparc.c (leon3_cost): New constant.
(sparc_option_override): Add leon3 support.
(mem_ref): New function.
(sparc_gate_work_around_errata): Return true if -mfix-ut699 is enabled.
(sparc_do_work_around_errata): Look into the instruction in the delay
slot and adjust accordingly. Add fix for the data cache nullify issues
of the UT699. Change insertion position for the NOP.
* config/sparc/leon.md (leon_fpalu, leon_fpmds, write_buf): Delete.
(leon3_load): New reservation.
(leon_store): Bump latency to 2.
(grfpu): New automaton.
(grfpu_alu): New unit.
(grfpu_ds): Likewise.
(leon_fp_alu): Adjust.
(leon_fp_mult): Delete.
(leon_fp_div): Split into leon_fp_divs and leon_fp_divd.
(leon_fp_sqrt): Split into leon_fp_sqrts and leon_fp_sqrtd.
* config/sparc/sparc.md (cpu): Add leon3.
* config/sparc/sync.md (atomic_exchangesi): Disable if -mfix-ut699.
(swapsi): Likewise.
(atomic_test_and_set): Likewise.
(ldstub): Likewise.
From-SVN: r201147
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From-SVN: r195098
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* config/sparc/sparc-opts.h (enum sparc_memory_model_type): New.
* config/sparc/sparc.opt (mmemory-model=): New option.
* doc/invoke.texi (Sparc Options): Document it.
* config/sparc/sparc.c (sparc_option_override): Provide default
for sparc_memory_model.
(sparc_emit_membar_for_model): Omit barrier combinations that are
implied by the memory model.
From-SVN: r181853
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* config/sparc/sparc-opts.h (PROCESSOR_NIAGARA3,
PROCESSOR_NIAGARA4): New.
* config/sparc/sparc.opt: Handle new processor types.
* config/sparc/sparc.md: Add to "cpu" attribute.
* config/sparc/sparc.h (TARGET_CPU_niagara3,
TARGET_CPU_niagara4): New, treat as niagara2.
* config/sparc/linux64.h: Handle niagara3 and niagara4
like niagara2.
* config/sparc/sol2.h: Likewise.
* config/sparc/niagara2.md: Schedule niagara3 like
niagara2.
* config/sparc/sparc.c (sparc_option_override): Add
niagara3 and niagara4 handling.
(sparc32_initialize_trampoline): Likewise.
(sparc64_initialize_trampoline): Likewise.
(sparc_use_sched_lookahead): Likewise.
(sparc_issue_rate): Likewise.
(sparc_register_move_cost): Likewise.
* config/sparc/driver-sparc.c (cpu_names): Use niagara3
and niagara4 as appropriate.
* doc/invoke.texi: Document new processor types.
From-SVN: r178554
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gcc:
* config/sparc/driver-sparc.c: New file.
* config/sparc/x-sparc: New file.
* config.host: Use driver-sparc.o, sparc/x-sparc on
sparc*-*-solaris2*.
* config/sparc/sparc.opt (native): New value for enum
processor_type.
* config/sparc/sparc-opts.h (PROCESSOR_NATIVE): Declare.
* config/sparc/sparc.c (sparc_option_override): Abort if
PROCESSOR_NATIVE gets here.
* config/sparc/sol2.h [__sparc__] (host_detect_local_cpu): Declare.
(EXTRA_SPEC_FUNCTIONS, MCPU_MTUNE_NATIVE_SPECS,
DRIVER_SELF_SPECS): Define.
* doc/invoke.texi (SPARC Options, -mcpu): Document native.
(SPARC Options, -mtune): Likewise.
* configure.ac (EXTRA_GCC_LIBS): Check for libkstat.
Substitute result.
* configure: Regenerate.
* Makefile.in (EXTRA_GCC_LIBS): Set.
(xgcc$(exeext)): Add $(EXTRA_GCC_LIBS).
(cpp$(exeext)): Likewise.
gcc/cp:
* Make-lang.in (g++$(exeext)): Add $(EXTRA_GCC_LIBS).
gcc/fortran:
* Make-lang.in (gfortran$(exeext)): Add $(EXTRA_GCC_LIBS).
gcc/go:
* Make-lang.in (gccgo$(exeext)): Add $(EXTRA_GCC_LIBS).
gcc/java:
* Make-lang.in ($(XGCJ)$(exeext)): Add $(EXTRA_GCC_LIBS).
From-SVN: r177559
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* config/sparc/sparc-opts.h: New.
* config/sparc/sparc.c (sparc_handle_option, sparc_select,
sparc_cpu, fpu_option_set, TARGET_HANDLE_OPTION): Remove.
(sparc_option_override): Store processor_type enumeration rather
than string in cpu_default. Remove name and enumeration from
cpu_table. Directly default -mcpu then default -mtune from -mcpu
without using sparc_select. Use target_flags_explicit instead of
fpu_option_set.
* config/sparc/sparc.h (enum processor_type): Move to
sparc-opts.h.
(sparc_cpu, struct sparc_cpu_select, sparc_select): Remove.
* config/sparc/sparc.opt (config/sparc/sparc-opts.h): New
HeaderInclude entry.
(mcpu=, mtune=): Use Var and Enum.
(sparc_processor_type): New Enum and EnumValue entries.
From-SVN: r171601
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