i386: Fix ix86_hard_regno_mode_ok for TDmode on 32bit targets [PR101346]

i386: Fix ix86_hard_regno_mode_ok for TDmode on 32bit targets [PR101346]

General regs on 32bit targets do not support 128bit modes,
including TDmode.

gcc/

2021-07-15  Uroš Bizjak  <ubizjak@gmail.com>

	PR target/101346
	* config/i386/i386.h (VALID_SSE_REG_MODE): Add TDmode.
	(VALID_INT_MODE_P): Add SDmode and DDmode.
	Add TDmode for TARGET_64BIT.
	(VALID_DFP_MODE_P): Remove.
	* config/i386/i386.c (ix86_hard_regno_mode_ok):
	Do not use VALID_DFP_MODE_P.

gcc/testsuite/

2021-07-15  Uroš Bizjak  <ubizjak@gmail.com>

	PR target/101346
	* gcc.target/i386/pr101346.c: New test.