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| author | Christophe Lyon <christophe.lyon@linaro.org> | 2013-03-21 14:26:23 +0000 |
|---|---|---|
| committer | Christophe Lyon <clyon@gcc.gnu.org> | 2013-03-21 15:26:23 +0100 |
| commit | 65074f54c54e765f5e66ecee17c4ad16f66c3780 (patch) | |
| tree | b9768087119317b4802f80b8ca8770053b66d8b3 /gcc/doc | |
| parent | 5a2d2a7900124db247d16cae7a751f4b1f19bce4 (diff) | |
| download | gcc-65074f54c54e765f5e66ecee17c4ad16f66c3780.zip gcc-65074f54c54e765f5e66ecee17c4ad16f66c3780.tar.gz gcc-65074f54c54e765f5e66ecee17c4ad16f66c3780.tar.bz2 | |
[ARM] Turning off 64bits ops in Neon
2013-03-21 Christophe Lyon <christophe.lyon@linaro.org>
gcc/
* config/arm/arm-protos.h (tune_params): Add
prefer_neon_for_64bits field.
* config/arm/arm.c (prefer_neon_for_64bits): New variable.
(arm_slowmul_tune): Default prefer_neon_for_64bits to false.
(arm_fastmul_tune, arm_strongarm_tune, arm_xscale_tune): Ditto.
(arm_9e_tune, arm_v6t2_tune, arm_cortex_tune): Ditto.
(arm_cortex_a15_tune, arm_cortex_a5_tune): Ditto.
(arm_cortex_a9_tune, arm_v6m_tune, arm_fa726te_tune): Ditto.
(arm_option_override): Handle -mneon-for-64bits new option.
* config/arm/arm.h (TARGET_PREFER_NEON_64BITS): New macro.
(prefer_neon_for_64bits): Declare new variable.
* config/arm/arm.md (arch): Rename neon_onlya8 and neon_nota8 to
avoid_neon_for_64bits and neon_for_64bits. Remove onlya8 and
nota8.
(arch_enabled): Handle new arch types. Remove support for onlya8
and nota8.
(one_cmpldi2): Use new arch names.
* config/arm/arm.opt (mneon-for-64bits): Add option.
* config/arm/neon.md (adddi3_neon, subdi3_neon, iordi3_neon)
(anddi3_neon, xordi3_neon, ashldi3_neon, <shift>di3_neon): Use
neon_for_64bits instead of nota8 and avoid_neon_for_64bits instead
of onlya8.
* doc/invoke.texi (-mneon-for-64bits): Document.
gcc/testsuite:
* gcc.target/arm/neon-for-64bits-1.c: New tests.
* gcc.target/arm/neon-for-64bits-2.c: Likewise.
From-SVN: r196876
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 6cf142f..9b8b36a 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -510,7 +510,8 @@ Objective-C and Objective-C++ Dialects}. -mtp=@var{name} -mtls-dialect=@var{dialect} @gol -mword-relocations @gol -mfix-cortex-m3-ldrd @gol --munaligned-access} +-munaligned-access @gol +-mneon-for-64bits} @emph{AVR Options} @gccoptlist{-mmcu=@var{mcu} -maccumulate-args -mbranch-cost=@var{cost} @gol @@ -11530,6 +11531,11 @@ setting of this option. If unaligned access is enabled then the preprocessor symbol @code{__ARM_FEATURE_UNALIGNED} will also be defined. +@item -mneon-for-64bits +@opindex mneon-for-64bits +Enables using Neon to handle scalar 64-bits operations. This is +disabled by default since the cost of moving data from core registers +to Neon is high. @end table @node AVR Options |