On Mon, 29 Jul 2024, Richard Biener wrote:
> The following implements the hook, excluding x87 modes.
Jakub correctly pointed out complex modes, so I've adjusted the hook to
the following which might be easier to parse (and handles decimal
FP modes as returning true). Re-testing in progress.
/* Implement TARGET_MODE_CAN_TRANSFER_BITS. */
static bool
ix86_mode_can_transfer_bits (machine_mode mode)
{
if (GET_MODE_CLASS (mode) == MODE_FLOAT
|| GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
switch (GET_MODE_INNER (mode))
{
case SFmode:
case DFmode:
return TARGET_SSE_MATH && !TARGET_MIX_SSE_I387;
default:
return false;
}
return true;
}
> * i386.cc (TARGET_MODE_CAN_TRANSFER_BITS): Define.
> (ix86_mode_can_transfer_bits): New function.
> ---
> gcc/config/i386/i386.cc | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
> index 12d15feb5e9..584417992a0 100644
> --- a/gcc/config/i386/i386.cc
> +++ b/gcc/config/i386/i386.cc
> @@ -26113,6 +26113,14 @@ ix86_have_ccmp ()
> return (bool) TARGET_APX_CCMP;
> }
>
> +/* Implement TARGET_MODE_CAN_TRANSFER_BITS. */
> +static bool
> +ix86_mode_can_transfer_bits (machine_mode mode)
> +{
> + return (!SCALAR_FLOAT_MODE_P (mode)
> + || (TARGET_SSE_MATH && !TARGET_MIX_SSE_I387 && mode != XFmode));
> +}
> +
> /* Target-specific selftests. */
>
> #if CHECKING_P
> @@ -26959,6 +26967,9 @@ ix86_libgcc_floating_mode_supported_p
> #undef TARGET_HAVE_CCMP
> #define TARGET_HAVE_CCMP ix86_have_ccmp
>
> +#undef TARGET_MODE_CAN_TRANSFER_BITS
> +#define TARGET_MODE_CAN_TRANSFER_BITS ix86_mode_can_transfer_bits
> +
> static bool
> ix86_libc_has_fast_function (int fcode ATTRIBUTE_UNUSED)
> {
>
--
Richard Biener <rguent...@suse.de>
SUSE Software Solutions Germany GmbH,
Frankenstrasse 146, 90461 Nuernberg, Germany;
GF: Ivo Totev, Andrew McDonald, Werner Knoblich; (HRB 36809, AG Nuernberg)
