IBM Z: Add support for HLASM extended mnemonics
Add extended mnemonics used in the HLASM assembler. All of them are just aliases for instructions we already support and help when assembling code which was written for the HLASM assembler. The HLASM mnemonics are documented here: https://www.ibm.com/support/knowledgecenter/SSENW6_1.6.0/com.ibm.hlasm.v1r6.asm/asmr1023.pdf See the 'Branching with extended mnemonic codes' chapter. objdump will still print the existing mnemonics with the exception of relative nop branches (i.e. conditional branches with an empty condition code mask). Now we have jnop and jgnop which will be used by objdump when possible. The same change have been applied to the LLVM assembler: https://reviews.llvm.org/D92185 opcodes/ * s390-opc.txt: Add extended mnemonics. gas/ * testsuite/gas/s390/esa-g5.s: Test new extended mnemonics. * testsuite/gas/s390/esa-g5.d: Likewise. * testsuite/gas/s390/esa-z900.s: Likewise. * testsuite/gas/s390/esa-z900.d: Likewise. * testsuite/gas/s390/zarch-z900.s: Likewise. * testsuite/gas/s390/zarch-z900.d: Likewise. ld/ * testsuite/ld-s390/tlsbin_64.dd: The newly added jgnop mnemonic replaces long relative branches with empty condition code mask.