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Re: [patches] status of glibc for e500/mpc8540 ?
- To: Philippe De Muyter <phdm@xxxxxxxxx>
- Subject: Re: [patches] status of glibc for e500/mpc8540 ?
- From: "Joseph S. Myers" <joseph@xxxxxxxxxxxxxxxx>
- Date: Fri, 2 Nov 2007 18:36:29 +0000 (UTC)
On Thu, 1 Nov 2007, Philippe De Muyter wrote:
> I use linux-2.6.23.1, binutils-2.18, gcc-4.2.2, and glibc-2.7.
You must use EGLIBC, not FSF GLIBC, and GCC 4.2 does not include all
relevant patches (they are all in trunk, which will become GCC 4.3). You
must include the ports add-on when configuring EGLIBC for E500. To use
4.2 you need backports of a large number of patches relating mainly to IBM
long double support (these may not be the exact forms in which the log
entries appear on trunk), at least the following:
* config/rs6000/libgcc-ppc-glibc.ver (__gcc_qgt): Fix typo.
* config/rs6000/darwin-ldouble.c (__gcc_qunord): Define if
__NO_FPRS__, not just of _SOFT_DOUBLE.
* config/rs6000/libgcc-ppc-glibc.ver (__gcc_qunord): Likewise.
* config/rs6000/rs6000.c (rs6000_init_libfuncs): Use __gcc_qunord
also for E500 double.
* config/rs6000/rs6000.md (buneq, bunge, bungt, bunle, bunlt,
suneq, sunge, sungt, sunle, sunlt): Disable for (TARGET_HARD_FLOAT
&& !TARGET_FPRS).
* config/rs6000/spe.md (*frob_tf_ti, *frob_ti_tf, *frob_ti_tf_2,
*mov_si<mode>_e500_subreg0, *mov_si<mode>_e500_subreg0_2,
*mov_sitf_e500_subreg8, *mov_sitf_e500_subreg8_2, spe_extenddftf2,
spe_fix_trunctfsi2_internal, spe_negtf2_internal, cmptfeq_gpr,
tsttfeq_gpr, cmptfgt_gpr, tsttfgt_gpr, cmptflt_gpr, tsttflt_gpr):
Add length attributes.
* caller-save.c (add_stored_regs): Only handle SUBREGs if inner
REG is a hard register. Do not modify REG before calling
subreg_nregs.
* rtlanal.c (subreg_get_info): Don't assert size of XMODE is a
multiple of the size of YMODE for certain lowpart cases.
* gcc.c-torture/compile/pr30311.c: New test.
* rtlanal.c (subreg_get_info): Do not make register size
computations for mode sizes not divisible by the number of
registers.
* flow.c (mark_set_1): Remove excess parentheses.
* reload.c (reg_overlap_mentioned_for_reload_p): Move REG_P-only
code into REG_P case.
* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): Define
_SOFT_DOUBLE if doubles use software floating-point.
* config/rs6000/libgcc-ppc-glibc.ver: Export additional long
double functions if _SOFT_DOUBLE, not _SOFT_FLOAT.
* config/rs6000/darwin-ldouble.c: Also compile functions for
hard-float without FPRs. Use fmsub function for all __NO_FPRS__
cases. Compile extra functions if _SOFT_DOUBLE, not _SOFT_FLOAT.
* config/rs6000/linuxspe.h (SUBSUBTARGET_OVERRIDE_OPTIONS): Remove
commented-out long double override.
(CPP_LONGDOUBLE_DEFAULT_SPEC): Likewise.
* config/rs6000/eabispe.h: Likewise.
* config/rs6000/rs6000.c (rs6000_override_options): Don't override
long double for non-SPE.
(rs6000_handle_option): Likewise.
(invalid_e500_subreg): Disallow more subregs involding DImode,
DFmode, TImode or TFmode.
(rs6000_legitimate_offset_address_p): Check TFmode offsets for
E500 double.
(legitimate_lo_sum_address_p): Also check for TFmode for E500
double.
(rs6000_legitimize_address): Also handle TFmode for E500 double.
(rs6000_legitimize_reload_address): Also handle TFmode for E500
double.
(rs6000_legitimate_address): Also check for TFmode for E500
double.
(rs6000_emit_move): Use DFmode subregs of TFmode for E500 double.
(spe_build_register_parallel): Handle TFmode and TCmode.
(rs6000_spe_function_arg): Handle TFmode and TCmode for E500
double.
(function_arg): Handle TFmode and TCmode for E500 double.
(rs6000_init_libfuncs): Initialize extra libfuncs for soft double
in general.
(print_operand): Handle TFmode and TImode for %y.
(rs6000_generate_compare): Handle TFmode comparisons for E500
double.
(spe_func_has_64bit_regs_p): Check for TFmode for E500 double.
(rs6000_function_value): Handle TFmode and TCmode for E500 double.
(rs6000_libcall_value): Handle TFmode and TCmode for E500 double.
* config/rs6000/rs6000.h (CANNOT_CHANGE_MODE_CLASS): Check for
TFmode for E500 double.
* config/rs6000/rs6000.md (FP): Allow TF for E500 double.
(floatsidf2): Enable for E500 double.
(movtf_softfloat): Use rs6000_nonimmediate_operand.
(extenddftf2): Change to extenddftf2_fprs.
(extenddftf2): Call gen_spe_extenddftf2 or gen_extenddftf2_fprs
depending on TARGET_E500_DOUBLE.
(extendsftf2): Enable for E500 double.
(trunctfdf2): Enable for E500 double.
(trunctfsf2): Change to trunctfsf2_fprs.
(trunctfsf2): Call gen_spe_trunctfsf2 or gen_trunctfsf2_fprs
depending on TARGET_E500_DOUBLE.
(floatsitf2): Enable for E500 double.
(fix_trunctfsi2): Change to fix_trunctfsi2_fprs.
(fix_trunctfsi2): Call gen_spe_fix_trunctfsi2 or
gen_fix_trunctfsi2_fprs depending on TARGET_E500_DOUBLE.
(negtf2): Change to negtf2_internal.
(negtf2): New expander.
(abstf2): Enable for E500 double. Call gen_spe_abstf2_tst,
gen_spe_abstf2_cmp or gen_abstf2_internal depending on
TARGET_E500_DOUBLE and flag_unsafe_math_optimizations.
(movdi_internal32): Use rs6000_nonimmediate_operand.
(unnamed splitter): Likewise.
* config/rs6000/spe.md (CMPTFEQ_GPR, TSTTFEQ_GPR, CMPTFGT_GPR,
TSTTFGT_GPR, CMPTFLT_GPR, TSTTFLT_GPR): New unspecs.
(SPE64TF, DITI): New mode macros.
(frob_df_di): Change to frob_<SPE64:mode>_<DITI:mode>; allow more
modes.
(frob_tf_ti): New.
(frob_<mode>_di_2): New.
(frob_tf_di_8_2): New.
(frob_di_df): Change to frob_di_<mode>; allow more modes.
(frob_ti_tf): New.
(frob_di_df_2): Change to frob_<DITI:mode>_<SPE64:mode>_2; allow
more modes.
(frob_ti_<mode>_8_2): New.
(frob_ti_tf_2): New.
(mov_si<mode>_e500_subreg0, mov_si<mode>_e500_subreg0_2,
mov_si<mode>_e500_subreg4, mov_si<mode>_e500_subreg4_2): Allow
TFmode.
(mov_sitf_e500_subreg8, mov_sitf_e500_subreg8_2,
mov_sitf_e500_subreg12, mov_sitf_e500_subreg12_2): New.
(spe_trunctfdf2_internal1, spe_trunctfsf2, spe_extenddftf2,
spe_fix_trunctfsi2, spe_fix_trunctfsi2_internal,
spe_negtf2_internal, spe_abstf2_cmp, spe_abstf2_tst): New.
(cmptfeq_gpr, tsttfeq_gpr, cmptfgt_gpr, tsttfgt_gpr, cmptflt_gpr,
tsttflt_gp): New.
* rtlanal.c (struct subreg_info, subreg_get_info, subreg_nregs):
New.
(subreg_regno_offset, subreg_offset_representable_p): Change to
wrappers about subreg_get_info.
(refers_to_regno_p, reg_overlap_mentioned_p): Use subreg_nregs.
* rtl.h (subreg_nregs): Declare.
* doc/tm.texi (HARD_REGNO_NREGS_HAS_PADDING): Update to refer to
subreg_get_info.
* caller-save.c (mark_set_regs, add_stored_regs): Use
subreg_nregs.
* df-scan.c (df_ref_record): Use subreg_nregs.
* flow.c (mark_set_1): Use subreg_nregs.
* postreload.c (move2add_note_store): Use subreg_nregs.
* reload.c (decompose, refers_to_regno_for_reload_p,
reg_overlap_mentioned_for_reload_p): Use subreg_nregs.
* resource.c (update_live_status, mark_referenced_resources,
mark_set_resources): Use subreg_nregs.
* doc/tm.texi (HARD_REGNO_NREGS_HAS_PADDING,
HARD_REGNO_NREGS_WITH_PADDING): Document new target macros.
* defaults.h (HARD_REGNO_NREGS_HAS_PADDING,
HARD_REGNO_NREGS_WITH_PADDING): Define.
* config/i386/i386.h (HARD_REGNO_NREGS_HAS_PADDING,
HARD_REGNO_NREGS_WITH_PADDING): Define.
* rtlanal.c (subreg_regno_offset, subreg_offset_representable_p):
Use new macros to detect modes with holes; do not look at integer
units.
(subreg_offset_representable_p): Check for and disallow cases
where the modes use different numbers of bits from registers.
* config/rs6000/rs6000.c (rs6000_hard_regno_nregs): Use
UNITS_PER_FP_WORD for e500 GPRs containing doubles.
(rs6000_split_multireg_move): Use DFmode reg_mode for TFmode moves
in E500 double case.
--
Joseph S. Myers
joseph@xxxxxxxxxxxxxxxx