[nvptx] Add __PTX_ISA_VERSION_{MAJOR,MINOR}__
Add preprocessor macros __PTX_ISA_VERSION_MAJOR__ and
__PTX_ISA_VERSION_MINOR__.
For the default 6.0, we have:
...
$ echo | cc1 -E -dD - 2>&1 | grep PTX_ISA_VERSION
#define __PTX_ISA_VERSION_MAJOR__ 6
#define __PTX_ISA_VERSION_MINOR__ 0
...
and for 3.1, we have:
...
$ echo | cc1 -mptx=3.1 -E -dD - 2>&1 | grep PTX_ISA_VERSION
#define __PTX_ISA_VERSION_MAJOR__ 3
#define __PTX_ISA_VERSION_MINOR__ 1
...
These can be used to express things like:
...
#if __PTX_ISA_VERSION_MAJOR__ >= 4 && __PTX_ISA_VERSION_MAJOR__ >= 1
/* Code using %dynamic_smem_size. */
#else
/* Fallback code. */
#endif
...
Tested on nvptx.
gcc/ChangeLog:
2022-03-29 Tom de Vries <tdevries@suse.de>
PR target/104857
* config/nvptx/nvptx-c.cc (nvptx_cpu_cpp_builtins): Emit
__PTX_ISA_VERSION_MAJOR__ and __PTX_ISA_VERSION_MINOR__.
* config/nvptx/nvptx.cc (ptx_version_to_number): New function.
* config/nvptx/nvptx-protos.h (ptx_version_to_number): Declare.
gcc/testsuite/ChangeLog:
2022-03-29 Tom de Vries <tdevries@suse.de>
PR target/104857
* gcc.target/nvptx/ptx31.c: New test.
* gcc.target/nvptx/ptx60.c: New test.
* gcc.target/nvptx/ptx63.c: New test.
* gcc.target/nvptx/ptx70.c: New test.