The following implements the hook, excluding x87 modes.
* 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)
{
--
2.35.3
