Implement RDRSEED, ADX and PRFCHW instructions
gas/
* config/tc-i386.c: Add ADX, RDSEED and PRFCHW asm directives.
* doc/c-i386.texi: Document the new directives.
gas/testsuite/
* gas/i386/i386.exp: Run adx, rdseed and prefetchw tests.
* gas/i386/x86-64-arch-2.s: Use prefetchw as 3dnow and Prfchw tests.
* gas/i386/arch-10.s: Likewise.
* gas/i386/arch-10-1.l: Changed correspondingly.
* gas/i386/arch-10-2.l: Likewise.
* gas/i386/arch-10-3.l: Likewise.
* gas/i386/arch-10-4.l: Likewise.
* gas/i386/arch-10.d: Likewise.
* gas/i386/arch-10-lzcnt.d: Likewise.
* gas/i386/x86-64-arch-2.d: Likewise.
* gas/i386/x86-64-arch-2-lzcnt.d: Likewise.
* gas/i386/ilp32/x86-64-arch-2.d: Likewise.
* gas/i386/arch-10-prefetchw.d: New file.
* gas/i386/x86-64-arch-2-prefetchw.d: Likewise.
* gas/i386/rdseed.s: Likewise.
* gas/i386/rdseed.d: Likewise.
* gas/i386/rdseed-intel.d: Likewise.
* gas/i386/adx.s: Likewise.
* gas/i386/adx.d: Likewise.
* gas/i386/adx-intel.d: Likewise.
* gas/i386/x86-64-rdseed.s: Likewise.
* gas/i386/x86-64-rdseed.d: Likewise.
* gas/i386/x86-64-rdseed-intel.d: Likewise.
* gas/i386/x86-64-adx.s: Likewise.
* gas/i386/x86-64-adx.d: Likewise.
* gas/i386/x86-64-adx-intel.d: Likewise.
opcodes/
* i386-dis.c (PREFIX_0F38F6): New.
(prefix_table): Add adcx, adox instructions.
(three_byte_table): Use PREFIX_0F38F6.
(mod_table): Add rdseed instruction.
* i386-gen.c (cpu_flag_init): Add CpuADX, CpuRDSEED, CpuPRFCHW.
(cpu_flags): Likewise.
* i386-opc.h: Add CpuADX, CpuRDSEED, CpuPRFCHW.
(i386_cpu_flags): Add fields cpurdseed, cpuadx, cpuprfchw.
* i386-opc.tbl: Add instrcutions adcx, adox, rdseed. Extend
prefetchw.
* i386-tbl.h: Regenerate.
* i386-init.h: Likewise.
e2e1fcde62