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.

1 files changed, 14 insertions, 0 deletions

diff --git a/opcodes/s390-opc.txt b/opcodes/s390-opc.txt
index 33dbeb3..d84f9f7 100644
--- a/opcodes/s390-opc.txt
+++ b/opcodes/s390-opc.txt
@@ -246,10 +246,14 @@ d7 xc SS_L0RDRD "exclusive OR" g5 esa,zarch
 f8 zap SS_LLRDRD "zero and add" g5 esa,zarch
 a70a ahi RI_RI "add halfword immediate" g5 esa,zarch
 84 brxh RSI_RRP "branch relative on index high" g5 esa,zarch
+84 jxh RSI_RRP "branch relative on index high" g5 esa,zarch
 85 brxle RSI_RRP "branch relative on index low or equal" g5 esa,zarch
+85 jxle RSI_RRP "branch relative on index low or equal" g5 esa,zarch
 a705 bras RI_RP "branch relative and save" g5 esa,zarch
+a705 jas RI_RP "branch relative and save" g5 esa,zarch
 a704 brc RI_UP "branch relative on condition" g5 esa,zarch
 a706 brct RI_RP "branch relative on count" g5 esa,zarch
+a706 jct RI_RP "branch relative on count" g5 esa,zarch
 b241 cksm RRE_RR "checksum" g5 esa,zarch
 a70e chi RI_RI "compare halfword immediate" g5 esa,zarch
 a9 clcle RS_RRRD "compare logical long extended" g5 esa,zarch
@@ -268,8 +272,11 @@ a701 tml RI_RU "test under mask low" g5 esa,zarch
 4700 nop RX_0RRD "no operation" g5 esa,zarch optparm
 4700 b*8 RX_0RRD "conditional branch" g5 esa,zarch
 47f0 b RX_0RRD "unconditional branch" g5 esa,zarch
+a704 jnop RI_0P "nop jump" g5 esa,zarch
 a704 j*8 RI_0P "conditional jump" g5 esa,zarch
+a704 br*8 RI_0P "conditional jump" g5 esa,zarch
 a7f4 j RI_0P "unconditional jump" g5 esa,zarch
+a7f4 bru RI_0P "unconditional jump" g5 esa,zarch
 b34a axbr RRE_FEFE "add extended bfp" g5 esa,zarch
 b31a adbr RRE_FF "add long bfp" g5 esa,zarch
 ed000000001a adb RXE_FRRD "add long bfp" g5 esa,zarch
@@ -437,7 +444,9 @@ e3000000001b slgf RXE_RRRD "subtract logical 64<32" z900 zarch
 e3000000000c msg RXE_RRRD "multiply single 64" z900 zarch
 e3000000001c msgf RXE_RRRD "multiply single 64<32" z900 zarch
 ec0000000044 brxhg RIE_RRP "branch relative on index high 64" z900 zarch
+ec0000000044 jxhg RIE_RRP "branch relative on index high 64" z900 zarch
 ec0000000045 brxlg RIE_RRP "branch relative on index low or equal 64" z900 zarch
+ec0000000045 jxleg RIE_RRP "branch relative on index low or equal 64" z900 zarch
 eb0000000044 bxhg RSE_RRRD "branch on index high 64" z900 zarch
 eb0000000045 bxleg RSE_RRRD "branch on index low or equal 64" z900 zarch
 eb000000000c srlg RSE_RRRD "shift right single logical 64" z900 zarch
@@ -462,10 +471,15 @@ eb0000000080 icmh RSE_RURD "insert characters under mask high" z900 zarch
 a702 tmhh RI_RU "test under mask high high" z900 zarch
 a703 tmhl RI_RU "test under mask high low" z900 zarch
 c004 brcl RIL_UP "branch relative on condition long" z900 esa,zarch
+c004 jgnop RIL_0P "nop jump long" z900 esa,zarch
 c004 jg*8 RIL_0P "conditional jump long" z900 esa,zarch
+c004 br*8l RIL_0P "conditional jump long" z900 esa,zarch
 c0f4 jg RIL_0P "unconditional jump long" z900 esa,zarch
+c0f4 brul RIL_0P "unconditional jump long" z900 esa,zarch
 c005 brasl RIL_RP "branch relative and save long" z900 esa,zarch
+c005 jasl RIL_RP "branch relative and save long" z900 esa,zarch
 a707 brctg RI_RP "branch relative on count 64" z900 zarch
+a707 jctg RI_RP "branch relative on count 64" z900 zarch
 a709 lghi RI_RI "load halfword immediate 64" z900 zarch
 a70b aghi RI_RI "add halfword immediate 64" z900 zarch
 a70d mghi RI_RI "multiply halfword immediate 64" z900 zarch