[PATCH v3 4/6] ppc/svp64: support svstep instructions

[Dmitry Selyutin <ghostmansd@gmail.com>]

https://libre-soc.org/openpower/sv/
https://libre-soc.org/openpower/isa/simplev/
---
 gas/testsuite/gas/ppc/ppc.exp  |  1 +
 gas/testsuite/gas/ppc/svstep.d | 13 +++++++++++++
 gas/testsuite/gas/ppc/svstep.s |  5 +++++
 opcodes/ppc-opc.c              |  3 +++
 4 files changed, 22 insertions(+)
 create mode 100644 gas/testsuite/gas/ppc/svstep.d
 create mode 100644 gas/testsuite/gas/ppc/svstep.s

diff --git a/gas/testsuite/gas/ppc/ppc.exp b/gas/testsuite/gas/ppc/ppc.exp
index cd4dd658ce..d4d06d587e 100644
--- a/gas/testsuite/gas/ppc/ppc.exp
+++ b/gas/testsuite/gas/ppc/ppc.exp
@@ -155,3 +155,4 @@ run_dump_test "pr27676"
 run_dump_test "raw"
 
 run_dump_test "setvl"
+run_dump_test "svstep"
diff --git a/gas/testsuite/gas/ppc/svstep.d b/gas/testsuite/gas/ppc/svstep.d
new file mode 100644
index 0000000000..156eb4668a
--- /dev/null
+++ b/gas/testsuite/gas/ppc/svstep.d
@@ -0,0 +1,13 @@
+#as: -mlibresoc
+#objdump: -dr -Mlibresoc
+
+.*:     file format .*
+
+
+Disassembly of section \.text:
+0+ <\.text>:
+.*:	(27 00 00 58|58 00 00 27) 	svstep. r0,1,0
+.*:	(26 00 00 58|58 00 00 26) 	svstep  r0,1,0
+.*:	(26 00 e0 59|59 e0 00 26) 	svstep  r15,1,0
+.*:	(26 7e 00 58|58 00 7e 26) 	svstep  r0,64,0
+.*:	(66 00 00 58|58 00 00 66) 	svstep  r0,1,1
diff --git a/gas/testsuite/gas/ppc/svstep.s b/gas/testsuite/gas/ppc/svstep.s
new file mode 100644
index 0000000000..f238954cf6
--- /dev/null
+++ b/gas/testsuite/gas/ppc/svstep.s
@@ -0,0 +1,5 @@
+svstep. 0,1,0
+svstep 0,1,0
+svstep 15,1,0
+svstep 0,64,0
+svstep 0,1,1
diff --git a/opcodes/ppc-opc.c b/opcodes/ppc-opc.c
index 2b47fb8781..c1ad26def9 100644
--- a/opcodes/ppc-opc.c
+++ b/opcodes/ppc-opc.c
@@ -6783,6 +6783,9 @@ const struct powerpc_opcode powerpc_opcodes[] = {
 {"rlmi",	M(22,0),	M_MASK,	     M601,	PPCVLE,		{RA, RS, RB, MBE, ME}},
 {"rlmi.",	M(22,1),	M_MASK,	     M601,	PPCVLE,		{RA, RS, RB, MBE, ME}},
 
+{"svstep",	SVL(22,19,0),	SVL_MASK,	SVP64,	PPCVLE,	{RT, SVi, vf}},
+{"svstep.",	SVL(22,19,1),	SVL_MASK,	SVP64,	PPCVLE,	{RT, SVi, vf}},
+
 {"setvl",	SVL(22,27,0),	SVL_MASK,	SVP64,	PPCVLE,	{RT, RA, SVi, vf, vs, ms}},
 {"setvl.",	SVL(22,27,1),	SVL_MASK,	SVP64,	PPCVLE,	{RT, RA, SVi, vf, vs, ms}},
 
-- 
2.36.1