i386: Support C++ template parameters in AMX intrinsics [PR122446]

i386: Support C++ template parameters in AMX intrinsics [PR122446]

The AMX intrinsics previously used string concatenation with the '#'
operator to construct register names, which prevented their use with
C++ template non-type parameters. This patch converts all AMX intrinsics
to use inline assembly constraints with the %c format specifier.

And Intel style registers also have % prefix, update Intel syntax to use plain
register names without % preifx.

gcc/ChangeLog:

	PR target/122446
	* config/i386/amxavx512intrin.h (_tile_cvtrowps2bf16hi_internal):
	Input register name by inline asm %c[...], and remove %% before tmm
	from intel side.
	(_tile_cvtrowps2bf16li_internal): Ditto.
	* config/i386/amxbf16intrin.h (_tile_dpbf16ps_internal): Ditto
	* config/i386/amxcomplexintrin.h (_tile_cmmimfp16ps_internal): Ditto
	(_tile_cmmrlfp16ps_internal): Ditto
	(_tile_cmmimfp16ps): Ditto
	(_tile_cmmrlfp16ps): Ditto
	* config/i386/amxfp16intrin.h (_tile_dpfp16ps_internal): Ditto
	(_tile_dpfp16ps): Ditto
	* config/i386/amxfp8intrin.h (_tile_dpbf8ps_internal): Ditto
	(_tile_dpbhf8ps_internal): Ditto
	(_tile_dphbf8ps_internal): Ditto
	(_tile_dphf8ps_internal): Ditto
	(_tile_dpbf8ps): Ditto
	(_tile_dpbhf8ps): Ditto
	(_tile_dphbf8ps): Ditto
	(_tile_dphf8ps): Ditto
	* config/i386/amxint8intrin.h (_tile_int8_dp_internal): Ditto
	* config/i386/amxmovrsintrin.h (_tile_loaddrs_internal): Ditto
	(_tile_loaddrst1_internal): Ditto
	(_tile_loaddrs): Ditto
	(_tile_loaddrst1): Ditto
	* config/i386/amxtf32intrin.h (_tile_mmultf32ps_internal): Ditto
	* config/i386/amxtileintrin.h (_tile_loadd): Ditto
	(_tile_loadd_internal): Ditto
	(_tile_stream_loadd): Ditto
	(_tile_stream_loadd_internal): Ditto
	(_tile_stored): Ditto
	(_tile_stored_internal): Ditto
	(_tile_zero): Ditto
	(_tile_zero_internal): Ditto

gcc/testsuite/ChangeLog:

	PR target/122446
	* gcc.target/i386/amxbf16-asmintel-1.c: Modify dg-final to check intel
	form.
	* gcc.target/i386/amxcomplex-asmintel-1.c: Ditto.
	* gcc.target/i386/amxfp16-asmintel-1.c: Ditto.
	* gcc.target/i386/amxfp8-asmintel-1.c: Ditto.
	* gcc.target/i386/amxint8-asmintel-1.c: Ditto.
	* gcc.target/i386/amxmovrs-asmintel-1.c: Ditto.
	* gcc.target/i386/amxtf32-asmintel-1.c: Ditto.
	* gcc.target/i386/amxtile-asmintel-1.c: Ditto.
	* g++.target/i386/pr122446-1.C: New test.
	* g++.target/i386/pr122446-amxavx512.C: Ditto.
	* g++.target/i386/pr122446-amxbf16.C: Ditto.
	* g++.target/i386/pr122446-amxcomplex.C: Ditto.
	* g++.target/i386/pr122446-amxfp16.C: Ditto.
	* g++.target/i386/pr122446-amxfp8.C: Ditto.
	* g++.target/i386/pr122446-amxint8.C: Ditto.
	* g++.target/i386/pr122446-amxmovrs.C: Ditto.
	* g++.target/i386/pr122446-amxtf32.C: Ditto.
	* g++.target/i386/pr122446-amxtile.C: Ditto.