On 3/29/22 16:47, Tobias Burnus wrote:
On 29.03.22 16:28, Tobias Burnus wrote:
On 29.03.22 15:39, Tom de Vries wrote:
Any comments?
I think it would be useful to have additionally some wording for the
(new in GCC 12/new since today) macros,
Agreed.
i.e. something like:
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -27546,6 +27546,10 @@
strings must be lower-case. Valid ISA strings include @samp{sm_30} and
@samp{sm_35}. The default ISA is sm_35.
+This option causes the preprocessor macro @code{__PTX_SM__} to be defined
+to the architecture number multiplied by ten; for instance, for
+@samp{sm_35}, it has the value @samp{350}.
+
The macro is defined also if the option is not specified, so I think
this formulation is not 100% clear in that aspect. I've reformulated to
fix that.
Also, I took out the detail of how the value is determined, since we're
just following __CUDA_ARCH__ rather than defining our own policy.
@item -mptx=@var{version-string}
@opindex mptx
Generate code for given the specified PTX version (e.g.@: @samp{7.0}).
@@ -27553,6 +27557,10 @@
@samp{7.0}. The default PTX version is 6.0, unless a higher minimal
version is required for specified PTX ISA via option @option{-misa=}.
+This option causes the preprocessor macros
@code{__PTX_ISA_VERSION_MAJOR__}
+and @code{__PTX_ISA_VERSION_MINOR__} to be defined; for instance,
+for @samp{3.1} the macros have the values @samp{3} and @samp{1},
respectively.
+
Reformulated this as well.
Any comments?
Thanks,
- Tom
[nvptx, doc] Document predefined macros at march and mptx
Document predefined macros:
- __PTX_SM__ ,
- __PTX_ISA_VERSION_MAJOR__ and
- __PTX_ISA_VERSION_MINOR__ .
gcc/ChangeLog:
2022-03-29 Tom de Vries <tdevr...@suse.de>
* doc/invoke.texi (march): Document __PTX_SM__.
(mptx): Document __PTX_ISA_VERSION_MAJOR__ and
__PTX_ISA_VERSION_MINOR__.
Co-Authored-By: Tobias Burnus <tob...@codesourcery.com>
---
gcc/doc/invoke.texi | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 43b75132c91b..09715a510b4d 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -27547,6 +27547,10 @@ Generate code for the specified PTX ISA target architecture
@samp{sm_35}, @samp{sm_53}, @samp{sm_70}, @samp{sm_75} and
@samp{sm_80}. The default target architecture is sm_30.
+This option sets the value of the preprocessor macro
+@code{__PTX_SM__}; for instance, for @samp{sm_35}, it has the value
+@samp{350}.
+
@item -misa=@var{architecture-string}
@opindex misa
Alias of @option{-march=}.
@@ -27566,6 +27570,11 @@ Valid version strings include @samp{3.1}, @samp{6.0}, @samp{6.3}, and
version is required for specified PTX ISA target architecture via
option @option{-march=}.
+This option sets the values of the preprocessor macros
+@code{__PTX_ISA_VERSION_MAJOR__} and @code{__PTX_ISA_VERSION_MINOR__};
+for instance, for @samp{3.1} the macros have the values @samp{3} and
+@samp{1}, respectively.
+
@item -mmainkernel
@opindex mmainkernel
Link in code for a __main kernel. This is for stand-alone instead of
