Hi,
on 2023/7/20 12:35, jeevitha via Gcc-patches wrote:
> Hi All,
>
> The following patch has been bootstrapped and regtested on powerpc64le-linux.
>
> When the user specifies PTImode as an attribute, it breaks. Created
> a tree node to handle PTImode types. PTImode attribute helps in generating
> even/odd register pairs on 128 bits.
>
> 2023-07-20 Jeevitha Palanisamy <[email protected]>
>
> gcc/
> PR target/110411
> * config/rs6000/rs6000.h (enum rs6000_builtin_type_index): Add fields
> to hold PTImode type.
> * config/rs6000/rs6000-builtin.cc (rs6000_init_builtins): Add node
> for PTImode type.
>
> gcc/testsuite/
> PR target/106895
> * gcc.target/powerpc/pr106895.c: New testcase.
>
> diff --git a/gcc/config/rs6000/rs6000-builtin.cc
> b/gcc/config/rs6000/rs6000-builtin.cc
> index a8f291c6a72..ca00c3b0d4c 100644
> --- a/gcc/config/rs6000/rs6000-builtin.cc
> +++ b/gcc/config/rs6000/rs6000-builtin.cc
> @@ -756,6 +756,15 @@ rs6000_init_builtins (void)
> else
> ieee128_float_type_node = NULL_TREE;
>
> + /* PTImode to get even/odd register pairs. */
> + intPTI_type_internal_node = make_node(INTEGER_TYPE);
> + TYPE_PRECISION (intPTI_type_internal_node) = GET_MODE_BITSIZE (PTImode);
> + layout_type (intPTI_type_internal_node);
> + SET_TYPE_MODE (intPTI_type_internal_node, PTImode);
> + t = build_qualified_type (intPTI_type_internal_node, TYPE_QUAL_CONST);
> + lang_hooks.types.register_builtin_type (intPTI_type_internal_node,
> + "__int128pti");
IIUC, this builtin type registering makes this type expose to users, so
I wonder if we want to actually expose this type for users' uses.
If yes, we need to update the documentation (and not sure if the current
name is good enough); otherwise, I wonder if there is some existing
practice to declare a builtin type with a name which users can't actually
use and is just for shadowing a mode.
BR,
Kewen
> +
> /* Vector pair and vector quad support. */
> vector_pair_type_node = make_node (OPAQUE_TYPE);
> SET_TYPE_MODE (vector_pair_type_node, OOmode);
> diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h
> index 3503614efbd..0456bf56d17 100644
> --- a/gcc/config/rs6000/rs6000.h
> +++ b/gcc/config/rs6000/rs6000.h
> @@ -2303,6 +2303,7 @@ enum rs6000_builtin_type_index
> RS6000_BTI_ptr_vector_quad,
> RS6000_BTI_ptr_long_long,
> RS6000_BTI_ptr_long_long_unsigned,
> + RS6000_BTI_PTI,
> RS6000_BTI_MAX
> };
>
> @@ -2347,6 +2348,7 @@ enum rs6000_builtin_type_index
> #define uintDI_type_internal_node
> (rs6000_builtin_types[RS6000_BTI_UINTDI])
> #define intTI_type_internal_node
> (rs6000_builtin_types[RS6000_BTI_INTTI])
> #define uintTI_type_internal_node
> (rs6000_builtin_types[RS6000_BTI_UINTTI])
> +#define intPTI_type_internal_node (rs6000_builtin_types[RS6000_BTI_PTI])
> #define float_type_internal_node
> (rs6000_builtin_types[RS6000_BTI_float])
> #define double_type_internal_node
> (rs6000_builtin_types[RS6000_BTI_double])
> #define long_double_type_internal_node
> (rs6000_builtin_types[RS6000_BTI_long_double])
> diff --git a/gcc/testsuite/gcc.target/powerpc/pr106895.c
> b/gcc/testsuite/gcc.target/powerpc/pr106895.c
> new file mode 100644
> index 00000000000..04630fe1df5
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/powerpc/pr106895.c
> @@ -0,0 +1,15 @@
> +/* PR target/106895 */
> +/* { dg-require-effective-target int128 } */
> +/* { dg-options "-O2" } */
> +
> +/* Verify the following generates even/odd register pairs. */
> +
> +typedef __int128 pti __attribute__((mode(PTI)));
> +
> +void
> +set128 (pti val, pti *mem)
> +{
> + asm("stq %1,%0" : "=m"(*mem) : "r"(val));
> +}
> +
> +/* { dg-final { scan-assembler "stq 10,0\\(5\\)" } } */
>
>
