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| author | Thomas Schwinge <tschwinge@baylibre.com> | 2024-11-11 13:20:46 +0100 |
|---|---|---|
| committer | Thomas Schwinge <tschwinge@baylibre.com> | 2024-12-09 10:48:40 +0100 |
| commit | d4e1f7cfdb8375c2a0076d4227a220b5e2682834 (patch) | |
| tree | c6fb1f1b4ed2dd025480650dc3ea103af23c79d1 | |
| parent | 91c503431f675bf3c94bd23c2b1deecdd2df52b8 (diff) | |
| download | gcc-d4e1f7cfdb8375c2a0076d4227a220b5e2682834.zip gcc-d4e1f7cfdb8375c2a0076d4227a220b5e2682834.tar.gz gcc-d4e1f7cfdb8375c2a0076d4227a220b5e2682834.tar.bz2 | |
nvptx: Switch default from '-march=sm_30' to '-march=sm_52'
In preparation of GCC/nvptx code changes that require sm_52 features, this
commit raises nvptx code generation from sm_30 "Kepler" to sm_52 "Maxwell".
The latter has been supported as of CUDA 6.5 (2014-08), and is thus supported
by most Nvidia GPUs of the last decade, approximately. (This commit doesn't
change the use of PTX ISA 6.0, which already requires CUDA 9.0 anyway.)
To continue building sm_30 multilib variants (for use via building/linking with
'-march=sm_30'), specify '--with-multilib-list=default,sm_30', for example. Or,
to continue defaulting to sm_30 multilib variants, specify '--with-arch=sm_30'
(plus '--without-multilib-list', if applicable). See the documentation,
<https://gcc.gnu.org/install/specific.html#nvptx-x-none>.
(Note that after a long deprecation time, eventually the
sm_3x "Kepler architecture support is removed from CUDA 12.0", 2022-12.)
gcc/
* config.gcc [nvptx-*]: Switch default from '-march=sm_30' to
'-march=sm_52'.
* doc/install.texi (Nvidia PTX Options): Update.
| -rw-r--r-- | gcc/config.gcc | 4 | ||||
| -rw-r--r-- | gcc/doc/install.texi | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/gcc/config.gcc b/gcc/config.gcc index a2d21b5..262b38c 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -4133,7 +4133,7 @@ if test x$with_arch = x ; then with_arch=mips2 ;; nvptx-*) - with_arch=sm_30 + with_arch=sm_52 ;; esac @@ -5596,7 +5596,7 @@ case "${target}" in nvptx-*) supported_defaults=arch - nvptx_multilibs_default=sm_30 + nvptx_multilibs_default=sm_52 case "x${with_multilib_list}" in x | xno) diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index f3a0700..feabf4c 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -1422,7 +1422,7 @@ is specified, then no additional multilibs are built. Otherwise, @var{list} is a comma separated list specifying which multilibs to build. List items are either @samp{sm_SM}, or @samp{default}, which is a -placeholder specifying a default set of multilibs: @samp{sm_30}. +placeholder specifying a default set of multilibs: @samp{sm_52}. Any duplicates are filtered out. If @option{--with-multilib-list} is not specified, then @option{--with-multilib-list=default} is assumed. @@ -4628,7 +4628,7 @@ Use the @option{--disable-sjlj-exceptions} and The @option{--with-arch} option may be specified to override the default value for the @option{-march} option, and to also build corresponding target libraries. -The default is @option{--with-arch=sm_30}. +The default is @option{--with-arch=sm_52}. For example, if @option{--with-arch=sm_70} is specified, code generation defaults to @option{-march=sm_70} and |