From-SVN: r107865

2005-12-02  Jon Grimm  <jgrimm2@us.ibm.com>
	    Janis Johnson  <janis187@us.ibm.com>
	    David Edelsohn  <dje@watson.ibm.com>
	    Ben Elliston  <bje@au.ibm.com>

	* dfp.h, dfp.c: New files.
	* Makefile.in (DECNUM, DECNUMINC, LIBDECNUMBER): New variables.
	(DECNUM_H): Likewise.
	(LIBDEPS, LIBS, BACKEND): Append $(LIBDECNUMBER).
	(INCLUDES): Append $(DECNUMINC).
	(OBJS-common): Add dfp.o.
	(dfp.o): New rule.
	* real.h (EXP_BITS): Pinch one bit to ..
	(struct real_value): Add decimal field.
	(real_format): Change table size, update documentation.
	(REAL_MODE_FORMAT): Update for to handle float, decimal float.
	(real_from_string3): Declare.
	(decimal_single_format): Declare.
	(decimal_double_format): Declare.
	(decimal_quad_format): Declare.
	(REAL_VALUE_TO_TARGET_DECIMAL32): New.
	(REAL_VALUE_TO_TARGET_DECIMAL64): New.
	(REAL_VALUE_TO_TARGET_DECIMAL128): New.
	* real.c: Include dfp.h.
	(normalize): Early return for decimal floats.
	(do_add): Zero decimal field.
	(do_compare): Call do_decimal_compare for decimal floats.
	(do_fix_trunc): Likewise, call decimal_do_fix_trunc.
	(real_arithmetic): Call decimal_real_arithmetic for decimal
	floating point operands.
	(real_identical): If a and b are of differing radix, return false.
	(real_to_integer): Call decimal_real_to_integer if the value is a
	decimal float.
	(real_to_integer2): Likewise, call decimal_real_to_integer2.
	(real_to_decimal): Likewise, call decimal_real_to_decimal.
	(real_to_hexadecimal): Place "N/A" in the return string for
	decimal float.
	(real_from_string3): New variant, given a mode.
	(real_maxval): Use decimal_real_maxval for decimal floats.
	(round_for_format): Use decimal_round_for_format for decimals.
	(real_convert): Use decimal_real_convert where appropriate.
	(significand_size): Handle base 10.
	(encode_decimal_single, decode_decimal_single,
	encode_decimal_double, decode_decimal_double, encode_decimal_quad,
	decode_decimal_quad): New functions.
	(decimal_single_format): New.
	(decimal_double_format): New.
	(decimal_quad_format): New.
	* machmode.def: Add SD, DD and TD decimal floating point modes.
	* machmode.h (FLOAT_MODE_P, SCALAR_FLOAT_MODE_P, MODES_WIDEN_P):
	Include MODE_DECIMAL_FLOAT.
	(DECIMAL_FLOAT_MODE_P): New.
	* mode-classes.def (MODE_DECIMAL_FLOAT): New mode class.
	* genmodes.c (struct mode_data): Add counter field.
	(struct mode_data): Update comment for format.
	(blank_mode): Initialise counter field.
	(new_mode): Increment counter field for each mode defined.
	(complete_mode): Handle MODE_DECIMAL_FLOAT, update check for mode
	using a format.
	(make_complex_modes): Handle modes containing `D'.
	(DECIMAL_FLOAT_MODE, FRACTIONAL_DECIMAL_FLOAT_MODE): New.
	(make_decimal_float_mode): New.
	(reset_float_format): Handle MODE_DECIMAL_FLOAT.
	(cmp_modes): Compare counter field if other characteristics
	similar.
	(emit_real_format_for_mode): Support formats for decimal floats.
	* doc/rtl.texi (Machine Modes): Document SD, DD and TDmodes.
	Document MODE_DECIMAL_FLOAT.

Co-Authored-By: Ben Elliston <bje@au.ibm.com>
Co-Authored-By: David Edelsohn <dje@watson.ibm.com>
Co-Authored-By: Janis Johnson <janis187@us.ibm.com>

From-SVN: r107861

        PR 23941
        * real.c (exact_real_truncate): Return false if the format cannot
        represent the number as a normal.

From-SVN: r104424

	PR c/21720
	* real.c (real_from_string): Also set last bit if there is a
	nonzero hex digit beyond GCC's internal precision after ".".

testsuite:
	* gcc.dg/hex-round-1.c: Test more cases.
	* gcc.dg/hex-round-2.c: New test.

From-SVN: r102567

	PR c/21720
	* real.c (real_from_string): Set last bit if there is a nonzero
	hex digit beyond GCC's internal precision.

testsuite:
	* gcc.dg/hex-round-1.c: New test.

From-SVN: r102539

From-SVN: r101317

real.c (c4x_single_format, [...]): Provide values for signbit_ro for c4x's single and extended floating point formats.


	* real.c (c4x_single_format, c4x_extended_format): Provide values
	for signbit_ro for c4x's single and extended floating point formats.
	* optabs.c (expand_copysign): Use the floating point format's
	signbit_ro for expanding via expand_copysign_absneg, and it's
	signbit_rw field for expanding via expand_copysign_bit.

Co-Authored-By: Richard Henderson <rth@redhat.com>

From-SVN: r96530

real.h (struct real_format): Split the signbit field into two two fields, signbit_ro and signbit_rw.


	* real.h (struct real_format): Split the signbit field into two
	two fields, signbit_ro and signbit_rw.
	* real.c (ieee_single_format, mips_single_format, ieee_double_format,
	mips_double_format, ieee_extended_motorola_format,
	ieee_extended_intel_96_format, ieee_extended_intel_96_round_53_format,
	ieee_extended_intel_128_format, ibm_extended_format,
	mips_extended_format, ieee_quad_format, mips_quad_format,
	vax_f_format, vax_d_format, vax_g_format, i370_single_format,
	i370_double_format, c4x_single_format, c4x_extended_format,
	real_internal_format): Update initializers for new field.
	* builtins.c (expand_builtin_signbit): Use signbit_ro field of the
	real_format structure.
	* optabs.c (expand_absneg_bit, expand_copysign): Use signbit_rw
	field of the real_format structure.

From-SVN: r96471

From-SVN: r96169

	* real.c (do_add): Initialize signalling and canonical members.

	* real.c (real_from_integer): Zero out destination.

From-SVN: r94228

re PR rtl-optimization/576 (gcc performs invalid optimization with float operations when different rounding mode.)


	PR rtl-optimization/576
	* real.c (real_arithmetic): Change return type from void to bool
	to return an indication that the result may be inexact.
	* real.h (real_arithmeric): Update prototype.
	* fold-const.c (const_binop):  Don't constant fold floating
	point expressions when the user specifies -frounding-math and
	the result may depend upon the run-time rounding mode.
	(fold_convert_const_real_from_real): Clean-up.
	(fold_initializer): Ignore flag_rounding_math for initializers.
	* simplify-rtx.c (simplify_binary_operation): Likewise, don't
	constant fold FP operations with flag_rounding_math if the
	result may depend upon the run-time rounding mode.

From-SVN: r94020

	* real.c (real_floor): Don't leave the result uninitialized when
	mode is VOIDMode, but return the unrounded intermediate value.
	(real_ceil): Likewise.

From-SVN: r93988

From-SVN: r91964

	* ra-build.c (copy_insn_p, remember_move, defuse_overlap_p_1,
	live_out_1, prune_hardregs_for_mode, init_one_web_common,
	reinit_one_web, add_subweb, add_subweb_2, init_web_parts,
	record_conflict, compare_and_free_webs, init_webs_defs_uses,
	parts_to_webs_1, parts_to_webs, reset_conflicts,
	check_conflict_numbers, remember_web_was_spilled, handle_asm_insn,
	ra_build_free): Use gcc_assert and gcc_unreachable instead of abort.
	* ra-colorize.c (push_list, put_web, reset_lists, put_web_at_end,
	put_move, remove_move, combine, select_spill, colorize_one_web,
	try_recolor_web, insert_coalesced_conflicts, check_colors,
	break_precolored_alias, restore_conflicts_from_coalesce,
	sort_and_combine_web_pairs, check_uncoalesced_moves): Likewise.
	* ra-rewrite.c (spill_coalescing, slots_overlap_p, emit_loads,
	reloads_to_loads, rewrite_program2, emit_colors): Likewise.
	* ra.c (first_hard_reg, create_insn_info, find_subweb, init_ra,
	check_df): Likewise.
	* real.c (do_add, do_multiply, do_divide, do_compare, do_fix_trunc,
	real_arithmetic, real_compare, real_exponent, real_ldexp,
	real_identical, real_to_integer, real_to_integer2, real_to_decimal,
	real_to_hexadecimal, real_from_integer, ten_to_ptwo, ten_to_mptwo,
	real_digit, real_nan, real_maxval, round_for_format, real_convert,
	real_to_target, real_from_target, real_hash, encode_ieee_single,
	encode_ieee_double, encode_ieee_extended, encode_ieee_quad,
	encode_vax_f, encode_vax_d, encode_vax_g, encode_i370_single,
	encode_i370_double, encode_c4x_single, encode_c4x_extended): Likewise.
	* recog.c (validate_change, validate_replace_rtx_1, asm_operand_ok,
	extract_insn, peep2_next_insn, peep2_reg_dead_p,
	peep2_find_free_register, peephole2_optimize, store_data_bypass_p,
	if_test_bypass_p): Likewise.
	* reg-stack.c (record_label_references, get_asm_operand_n_inputs,
	stack_result, remove_regno_note, get_hard_regnum, emit_pop_insn,
	emit_swap_insn, swap_to_top, move_for_stack_reg,
	subst_stack_regs_pat, subst_asm_stack_regs, change_stack,
	compensate_edge, convert_regs_1): Likewise.
	* regclass.c (init_reg_sets, init_reg_sets_1,
	memory_move_secondary_cost): Likewise.
	* regrename.c (note_sets, clear_dead_regs, scan_rtx_reg, scan_rtx):
	Likewise.
	* reload.c (push_secondary_reload, find_valid_class, push_reload,
	operands_match_p, decompose, immune_p, find_reloads,
	find_reloads_toplev, find_reloads_address_1, subst_reloads,
	copy_replacements, refers_to_regno_for_reload_p,
	reg_overlap_mentioned_for_reload_p): Likewise.
	* reload1.c (compute_use_by_pseudos, replace_pseudos_in, reload,
	count_pseudo, find_reg, eliminate_regs, eliminate_regs_in_insn,
	verify_initial_elim_offsets, finish_spills, clear_reload_reg_in_use,
	reload_reg_free_p, reload_reg_reaches_end_p, reloads_conflict,
	choose_reload_regs, merge_assigned_reloads, emit_input_reload_insns,
	do_output_reload, fixup_abnormal_edges): Likewise.
	* reorg.c (stop_search_p, emit_delay_sequence, get_jump_flags,
	fill_slots_from_thread, relax_delay_slots): Likewise.
	* resource.c (mark_referenced_resources, mark_set_resources):
	Likewise.
	* rtl.c (copy_rtx, rtx_equal_p): Likewise.
	* rtlanal.c (insn_dependent_p, reg_overlap_mentioned_p,
	dead_or_set_p, find_reg_fusage, remove_note, replace_rtx,
	subreg_lsb_1, subreg_regno_offset, subreg_offset_representable_p,
	find_first_parameter_load, can_hoist_insn_p, hoist_update_store,
	hoist_insn_after, hoist_insn_to_edge, nonzero_bits1): Likewise.
	* rtlhooks.c (gen_lowpart_general): Likewise.
	* sbitmap.c (sbitmap_difference): Likewise.
	* sched-deps.c (add_dependence, sched_analyze_1, sched_analyze_2,
	sched_analyze, add_forward_dependence): Likewise.
	* sched-ebb.c (fix_basic_block_boundaries, schedule_ebb): Likewise.
	* sched-rgn.c (debug_regions, compute_trg_info, schedule_region,
	schedule_insns): Likewise.
	* sched-vis.c (print_pattern): Likewise.
	* sdbout.c (sdbout_symbol, sdbout_toplevel_data): Likewise.
	* simplify-rtx.c (simplify_unary_operation, simplify_binary_operation,
	simplify_const_relational_operation, simplify_ternary_operation,
	simplify_immed_subreg, simplify_subreg, simplify_gen_subreg):
	Likewise.
	* sreal.c (copy, sreal_sub, sreal_div): Likewise.
	* stmt.c (force_label_rtx, expand_goto, expand_asm_operands,
	resolve_operand_name_1, expand_return, expand_decl,
	expand_anon_union_decl, emit_case_bit_tests, expand_case): Likewise.
	* stor-layout.c (put_pending_size, smallest_mode_for_size,
	int_mode_for_mode, layout_decl, finish_builtin_struct, layout_type,
	set_sizetype, get_mode_bounds): Likewise.

From-SVN: r87244

	* c-common.c: Rename all identifiers named `class' to `cl'.
	* c-decl.c: Likewise.
	* c-common.h: Likewise.
	* c-parse.in: Likewise.
	* c-typeck.c: Likewise.
	* genmodes.c: Likewise.
	* real.c: Likewise.
	* real.h: Likewise.
	* recog.c: Likewise.
	* recog.h: Likewise.
	* regrename.c: Likewise.
	* tree.h: Likewise.

From-SVN: r85153

	Bug 14610
	* Makefile.in (min-insn-modes.o): Correct dependencies.
	* real.c (encode_ieee_extended, decode_ieee_extended): Always
	produce/consume 12-byte little-endian Intel format.
	(encode_ieee_extended_128, decode_ieee_extended_128): Delete.
	(encode_ieee_extended_motorola, decode_ieee_extended_motorola)
	(encode_ieee_extended_intel_96, decode_ieee_extended_intel_96)
	(encode_ieee_extended_intel_128, decode_ieee_extended_intel_128):
	New functions which convert between 12-byte little-endian Intel
	format and the desired format.
	(ieee_extended_motorola_format, ieee_extended_intel_96_round_53_format)
	(ieee_extended_intel_96_format, ieee_extended_intel_128_format):
	Update.
testsuite:
	* gcc.dg/ia64-float80-1.c, gcc.dg/ia64-float80-2.c: New testcases.

From-SVN: r83295

From-SVN: r83133

	* real.c (real_copysign): New function to implement libm's copysign.
	* real.h (real_copysign): Prototype here.
	* fold-const.c (tree_expr_nonnegative_p): The result of sqrt, sqrtf
	and sqrtl can be negative, as sqrt(-0.0) = -0.0.  Correct whitespace.
	* builtins.c (fold_builtin_isascii, fold_builtin_toascii,
	fold_builtin_isdigit): Add function prototypes.
	(fold_builtin_copysign): New function to fold copysign, copysignf
	and copysignl.  Optimize copysign(x,x) as x.  Evaluate copysign of
	constant arguments at compile-time using real_copysign.  Fold
	copysign(X,Y) as fabs(X) if Y is always non-negative.
	(fold_builtin_1): Correct minor whitespace/style issues.  Call
	fold_builtin_copysign for BUILT_IN_COPYSIGN{,F,L}.

	* gcc.dg/builtins-41.c: New test case.
	* gcc.dg/builtins-42.c: New test case.

From-SVN: r82721

gcc/ChangeLog:
2004-05-27  Paolo Bonzini  <bonzini@gnu.org>
	    Roger Sayle  <roger@eyesopen.com>

	PR rtl-optimization/15649
	Add LTGT_EXPR and improve pretty-printing of unordered
	comparisons.
	* c-common.c (c_common_truthvalue_conversion):
	Handle LTGT_EXPR.
	* c-typeck.c (build_binary_op): Likewise.
	* dojump.c (do_jump): Likewise.
	* expr.c (expand_expr_real_1, do_store_flag): Likewise.
	* predict.c (tree_predict_by_opcode): Likewise.
	* real.c (real_compare): Likewise.
	* tree-cfg.c (verify_expr): Likewise.
	* tree-inline.c (estimate_num_insns_1): Likewise.
	* tree-pretty-print.c (dump_generic_node): Likewise.
	Handle ORDERED_EXPR, UNORDERED_EXPR.
	(op_symbol): Print unordered comparisons differently
	than ordered ones.
	* tree.def (LTGT_EXPR): New '<' tree code.
	* doc/c-tree.texi (Expressions): Document floating-point
	comparison nodes.

	Fold comparisons between floating point values.
	* fold-const.c (enum comparison_code): New, from
	#define'd constants.  Define compcodes for unordered
	comparisons and for invalid transformations.
	(invert_tree_comparison): Add "honor_nans" parameter.
	(fold_truthop): Revamp to work on floating-point types too.
	(comparison_to_compcode): Support unordered comparisons.
	Use new enum comparison_code.
	(compcode_to_comparison): Likewise.
	(combine_compcodes): New function.
	(invert_truthvalue): Let invert_tree_comparison decide
	whether it is valid to fold the comparison.  Fold ORDERED
	and UNORDERED even if flag_unsafe_math_optimizations is off,
	and the remaining even if flag_unsafe_math_optimizations
	is off but we are under -fno-trapping-math.
	(fold_relational_const): Integer modes do not honor NaNs.

gcc/testsuite/ChangeLog:
2004-05-27  Paolo Bonzini  <bonzini@gnu.org>

	* gcc.c-torture/compare-fp-1.c, gcc.c-torture/compare-fp-2.c,
	gcc.c-torture/compare-fp-3.c, gcc.c-torture/compare-fp-4.c,
	gcc.c-torture/compare-fp-3.x, gcc.c-torture/compare-fp-4.x,
	gcc.c-torture/pr15649-1.c: New.

Co-Authored-By: Roger Sayle <roger@eyesopen.com>

From-SVN: r82365

* real.h (struct real_value): Use the same type for all
bitfields.  Rename exp to uexp.
(REAL_EXP, SET_REAL_EXP): New accessor macros for uexp.
Adjust all uses of exp...
* builtins.c: ... here, ...
* emit-rtl.c: ... here, and ...
* real.c: ... and here.

From-SVN: r79802

From-SVN: r79321

	* real.c (encode_ibm_extended): Don't bother rounding low double.
	* c-cppbuiltin.c (builtin_define_float_constants): Tweak MAX
	when fmt->pnan < fmt->p.

From-SVN: r78900

	PR c/14088
	real.c (real_from_string): Look for 'X' as well as 'x' in
	hexfloat strings.

From-SVN: r77619

	* real.c (encode_ibm_extended): Normalize the input value before
	converting it to a double.  Handle the case where a normal value
	rounds to infinity.

From-SVN: r77498

	* real.c (real_floor, real_ceil): Tweak to allow input and output
	arguments to overlap.
	(real_round): New function to implement round(3m) semantics.
	* real.h (real_round): Prototype here.
	* builtins.c (fold_builtin_round): New function to constant fold
	round, roundf and roundl.
	(fold_builtin): Call fold_builtin_round for BUILT_IN_ROUND{,F,L}.

	* gcc.dg/builtins-29.c: New test case.

From-SVN: r76428

	* real.c: Update copyright date.
	* emit-rtl.c: Likewise.
	* rtl.h: Likewise.
	* dwarf2out.c: Likewise.
	* config/rs6000/darwin-ldouble.c: Likewise.
	* config/rs6000/rs6000.md: Likewise.

From-SVN: r75742

	* config/rs6000/darwin-ldouble.c: Add big comment explaining
	exactly what is expected as a 'long double'.
	(_xlqadd): When a value to be returned is representable as a
	'double', just return it directly, do not construct it using a union.
	Also, correct final fixup.
	(_xlqmul): Likewise.
	(_xlqdiv): Likewise.
	* real.c (encode_ibm_extended): Make consistent with darwin-ldouble.c.

From-SVN: r75629

From-SVN: r73232

From-SVN: r73105

	* real.c (encode_ieee_extended): Initialize whole array.
	* reg-stack.c (move_for_stack_reg0: Use always XFmode.
	* i386-modes.def: Change definitions of TFmode and XFmode.
	* i386.c (classify_argument): Rename TFmodes to XFmodes; add new TFmode code.
	(construct_container): Allow constructing of TFmode integer containers.
	(ix86_return_in_memory):  XFmode is not returned in memory.
	(init_ext_80387_constants): Always use XFmode.
	(print_operand): Likewise.
	(ix86_prepare_fp_compare_regs): Likewise.
	(split_to_parts): Deal with TFmode.
	(split_long_move): Simplify.
	(ix86_init_mmx_sse_builtins): Add __float80, __float128.
	(ix86_memory_move_cost): Do not confuse TFmode.
	* i386.h (LONG_DOUBLE_TYPE_SIZE): Set to 96.
	(IS_STACK_MODE): TFmode is not stack mode.
	(HARD_REGNO_NREGS, CLASS_MAX_NREGS): Deal nicely with XFmode.
	(VALID_SSE_REG_MODE): Allow TFmode.
	(VALID_FP_MODE_P): Disallow TFmode.
	(VALID_INT_MODE_P): Allow TFmode in 64bit mode.
	* i386.md (TFmode patterns): Kill.
	(movtf, motf_rex64): New patterns.

From-SVN: r73099

From-SVN: r73066

	* Makefile.in (BUILD_RTL): Replace $(BUILD_PREFIX)insn-modes.o
	with min-insn-modes.o.
	(STAGESTUFF): Add min-insn-modes.c.
	(genobjs): Add genmodes.o.
	(print-rtl.o, print-rtl1.o): Depend on $(TM_P_H).
	(insn-modes.o): Depend on $(TM_H) not $(GTM_H); also real.h.
	(min-insn-modes.c, min-insn-modes.o): New rules.
	(s-modes): Also generate min-insn-modes.c.
	($(BUILD_PREFIX_1)insn-modes.o): Kill.
	* genmodes.c (struct mode_data): Add format field.
	(blank_mode, validate_mode, complete_mode): Update to match.
	(make_scalar_mode): Separate into make_int_mode and make_float_mode.
	(_SCALAR_MODE): Kill.
	(FLOAT_MODE, FRACTIONAL_FLOAT_MODE): Add format argument.
	(emit_insn_modes_c_header): Adjust.
	(emit_min_insn_modes_c_header, emit_real_format_for_mode)
	(emit_min_insn_modes_c): New functions.
	(emit_insn_modes_c): Call emit_real_format_for_mode.
	(main): Add -m option to generate min-insn-modes.c.
	* machmode.h: Update documentation.  Add format argument to
	all uses of FLOAT_MODE.
	* real.c: Don't define real_format_for_mode here.

	* dwarfout.c: Move default definition of PRINT_REG...
	* defaults.h: ...here.
	* print-rtl.c: Include tm_p.h.
	(DEBUG_PRINT_REG, DEBUG_REGISTER_NAMES, debug_reg_names, reg_names):
	Kill.
	(print_rtx): Use PRINT_REG, not DEBUG_PRINT_REG.  But surround
	this entire block with #ifndef GENERATOR_FILE.
	* regclass.c: Unconditionally define reg_names.
	* config/mips/mips.h, config/rs6000/rs6000.h, config/sh/sh.h
	Don't define DEBUG_REGISTER_NAMES.
	* config/rs6000/darwin.h: Don't use DEBUG_REGISTER_NAMES in
	redefinition of REGISTER_NAMES.
	* config/i386/i386.h: Don't define DEBUG_PRINT_REG.

	* combine.c: Change all preprocessor conditionals on
	EXTRA_CC_MODES to use SELECT_CC_MODE instead; rearrange a bit
	for clarity.
	* genopinit.c: Remove mention of EXTRA_CC_MODES in comment.
	* configure.in: Don't define EXTRA_CC_MODES.
	* configure, config.in: Regenerate.
	* doc/tm.texi: Remove documentation of EXTRA_CC_MODES.

	* config/arc/arc.c, config/m32r/m32r.c, config/sparc/sparc.c:
	May assume that GET_MODE_CLASS is accurate for extra CC modes
	at all times.

	* config/i860/i860.h (INIT_CUMULATIVE_ARGS): Pass correct
	number of arguments to aggregate_value_p.

	* genmodes.c (RESET_FLOAT_FORMAT, reset_float_format): New.
	* machmode.def: Explain ARCH-modes.def.  Document
	RESET_FLOAT_FORMAT.  Improve commentary on various mode
	clusters.  Do not define OI, PQI, PHI, PSI, PDI, QF, HF, TQF,
	XF, or TF modes here.  Remove backward-compatibility
	definition of CC.

	* config/alpha/alpha-modes.def: New file; define TF mode.
	* config/arc/arm-modes.def: Define XF mode.
	* config/c4x/c4x-modes.def: Define QF and HF modes.  Unset
	float format for SF and DF modes.
	* config/dsp16xx/dsp16xx-modes.def: New file; define HF mode.
	* config/i386/i386-modes.def: Define XF and TF modes.
	* config/i960/i960-modes.def: Define TF mode.
	* config/ia64/ia64-modes.def: Define TF and OI modes.
	* config/m68k/m68k-modes.def: New file; define XF mode.
	* config/mips/mips-modes.def: New file; define TF mode, reset
	formats for SF and DF modes.
	* config/pa/pa-modes.def: Define TF mode.
	* config/rs6000/rs6000.c: Define TF and PSI modes.
	* config/s390/s390-modes.def: Define OI mode.
	* config/sh/sh-modes.def: New file; define PSI mode.
	* config/sparc/sparc-modes.def: Define TF mode.
	* config/vax/vax-modes.def: New file; reset formats for SF and
	DF modes.

	* config/c4x/c4x.c (c4x_override_options): No need to mess
	with real_format_for_mode or set REAL_MODE_FORMATs.
	(c4x_immed_int_constant): Don't apply GET_MODE_CLASS to rtx
	variable.
	* config/i386/i386.c (override_options): No need to set
	REAL_MODE_FORMATs here.
	* config/i960/i960.c (i960_initialize): Likewise.
	* config/m68k/m68k.c (m68k_override_options): Likewise.
	* config/ia64/ia64.c (ia64_override_options): Set REAL_MODE_FORMAT
	for TFmode only if not the default.
	* config/mips/mips.c (override_options): Likewise.
	* config/vax/vax.c (override_optionms): Set REAL_MODE_FORMAT for
	DFmode only if not the default.

	* config/i370/i370.h (RET_REG): Don't consider TFmode.
	* config/m68hc11/m68hc11.c (print_operand): Don't consider XFmode.
	* config/dsp16xx/dsp16xx.c (hard_regno_mode_ok): #if 0 out use
	of modes that don't appear anywhere in the machine description.

	* config/arc/arc-modes.def, config/arm/arm-modes.def
	* config/c4x/c4x-modes.def, config/frv/frv-modes.def
	* config/i386/i386-modes.def, config/i960/i960-modes.def
	* config/ia64/ia64-modes.def, config/mmix/mmix-modes.def
	* config/pa/pa-modes.def, config/pdp11/pdp11-modes.def
	* config/rs6000/rs6000-modes.def, config/s390/s390-modes.def
	* config/sparc/sparc-modes.def: Convert to new style for
	declaring extra CC modes.

From-SVN: r72440

	* real.h (REAL_MODE_FORMAT): New macro.
	* c-cppbuiltin.c, optabs.c, real.c, config/alpha/alpha.c
	* config/c4x/c4x.c, config/i370/i370.c, config/i386/freebsd.h
	* config/i386/i386.c, config/i960/i960.c, config/ia64/ia64.c
	* config/m68k/m68k.c, config/mips/mips.c, config/rs6000/rs6000.c
	* config/vax/vax.c: Use REAL_MODE_FORMAT instead of referring
	directly to real_format_for_mode array, wherever possible.

From-SVN: r72168

From-SVN: r71919

From-SVN: r71642

* real.c: Update URL to VAX floating point docs.
(decode_vax_d): Extract 8 exponent bits instead of 7.

From-SVN: r71294

From-SVN: r70863

	* jump.c: Convert prototypes to ISO C90.
	* langhooks-def.h: Likewise.  Add extern to prototypes.
	* langhooks.c: Likewise.
	* langhooks.h: Likewise.
	* lcm.c: Likewise.
	* local-alloc.c: Likewise.
	* loop-init.c: Likewise.
	* loop-unroll.c: Likewise.
	* loop-unswitch.c: Likewise.
	* loop.c: Likewise.
	* loop.h: Likewise. Add extern to prototypes.
	* machmode.h: Likewise.
	* main.c: Likewise.
	* mbchar.c: Likewise.
	* mbchar.h: Likewise.
	* mkdeps.c: Likewise.
	* mkdeps.h: Likewise.
	* optabs.c: Likewise.
	* optabs.h: Likewise.
	* output.h: Likewise.
	* gccspec.c: Likwise.
	* postreload.c: Likewise.
	* prefix.c: Likewise.
	* prefix.h: Likewise.
	* print-rtl.c: Likewise.
	* print-tree.c: Likewise.
	* profile.c: Likewise.
	* read-rtl.c: Likewise.
	* real.c: Likewise.
	* real.h: Likewise.
	* recog.c: Likewise.
	* recog.h: Likewise.
	* reg-stack.c: Likewise.
	* regclass.c: Likewise.
	* regmove.c: Likewise.
	* regrename.c: Likewise.
	* regs.h: Likewise.
	* reload.c: Likewise.
	* reload.h: Likewise.
	* reload1.c: Likewise.
	* reorg.c: Likewise.
	* resource.c: Likewise.
	* resource.h: Likewise.
	* rtl-error.c: Likewise.
	* rtl.c: Likewise.
	* rtl.h: Likewise.
	* rtlanal.c: Likewise.

From-SVN: r68998

	* real.c (real_trunc, real_floor, real_ceil): New functions
	to implement trunc, floor and ceil respectively.
	* real.h (real_trunc, real_floor, real_ceil): Prototype here.
	* builtins.c (integer_valued_real_p): New function to test if
	a floating point expression has an integer valued result.
	(fold_trunc_transparent_mathfn): Optimize foo(foo(x)) as
	foo(x) where foo is an integer rounding function.  Similarly,
	optimize foo(bar(x)) as bar(x), and foo((double)(int)x) as
	(double)(int)x when both foo and bar are integer rounding
	functions and we don't need to honor errno.
	(fold_builtin_trunc, fold_builtin_floor, fold_builtin_ceil):
	New functions to fold trunc, floor and ceil.
	(fold_builtin): Use fold_builtin_trunc to fold BUILT_IN_TRUNC*,
	fold_builtin_floor to fold BUILT_IN_FLOOR* and fold_builtin_ceil
	to fold BUILT_IN_CEIL*.
	* fold-const.c (tree_expr_nonnegative_p): Handle FLOAT_EXPR and
	the remaining integer rounding functions.

	* gcc.dg/builtins-25.c: New testcase.
	* gcc.dg/builtins-26.c: New testcase.

From-SVN: r68903

	* real.h (ieee_extended_intel_96_round_53_format): New.
	* real.c (ieee_extended_intel_96_round_53_format): New.
	* config/i386/freebsd.h (SUBTARGET_OVERRIDE_OPTIONS): Use it
	for XFmode and TFmode.

From-SVN: r68445