* gas/config/tc-arm.c (NEON_ENC_TAB): Add vmaxnm, vminnm entries.
(vfp_or_neon_is_neon_bits): Add NEON_CHECK_ARCH8 enumerator.
(vfp_or_neon_is_neon): Add check for SIMD for ARMv8.
(do_maxnm): New function.
(insns): Add vmaxnm, vminnm entries.
* gas/testsuite/gas/testsuite/gas/armv8-a+fp.d: Update testcase.
* gas/testsuite/gas/testsuite/gas/armv8-a+fp.s: Likewise.
* gas/testsuite/gas/testsuite/gas/armv8-a+simd.d: New testcase.
* gas/testsuite/gas/testsuite/gas/armv8-a+simd.s: Likewise.
* opcodes/arm-dis.c (coprocessor_opcodes): Add VMAXNM/VMINNM.
(neon_opcodes): Likewise.