aarch64: rcpc3: Add FP load/store insns

Along with the relevant unit-tests, this adds the following rcpc3
instructions:

  STL1  { <Vt>.D }[<index>], [<Xn|SP>]
  LDAP1 { <Vt>.D }[<index>], [<Xn|SP>]

  LDAPUR <Bt>, [<Xn|SP>{, #<simm>}]
  LDAPUR <Ht>, [<Xn|SP>{, #<simm>}]
  LDAPUR <St>, [<Xn|SP>{, #<simm>}]
  LDAPUR <Dt>, [<Xn|SP>{, #<simm>}]
  LDAPUR <Qt>, [<Xn|SP>{, #<simm>}]

  STLUR <Bt>, [<Xn|SP>{, #<simm>}]
  STLUR <Ht>, [<Xn|SP>{, #<simm>}]
  STLUR <St>, [<Xn|SP>{, #<simm>}]
  STLUR <Dt>, [<Xn|SP>{, #<simm>}]
  STLUR <Qt>, [<Xn|SP>{, #<simm>}]

with `#<simm>' taking on a signed 8-bit integer value in the range
[-256,255] and `index' the values 0 or 1.

Co-authored-by: Srinath Parvathaneni <srinath.parvathaneni@arm.com>

5 files changed, 90 insertions, 0 deletions

diff --git a/gas/testsuite/gas/aarch64/rcpc3-fp-fail.d b/gas/testsuite/gas/aarch64/rcpc3-fp-fail.d
new file mode 100644
index 0000000..31c1279
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rcpc3-fp-fail.d
@@ -0,0 +1,3 @@
+#name: RCPC3 fp load/store illegal
+#as: -march=armv8.3-a+rcpc3 -mno-verbose-error
+#error_output: rcpc3-fp-fail.l
diff --git a/gas/testsuite/gas/aarch64/rcpc3-fp-fail.l b/gas/testsuite/gas/aarch64/rcpc3-fp-fail.l
new file mode 100644
index 0000000..20c08f8
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rcpc3-fp-fail.l
@@ -0,0 +1,13 @@
+[^:]+: Assembler messages:
+[^:]+:3: Error: register element index out of range 0 to 1 at operand 1 -- `stl1 {v1.d}\[-1\],\[x1\]'
+[^:]+:6: Error: register element index out of range 0 to 1 at operand 1 -- `stl1 {v1.d}\[2\],\[x1\]'
+[^:]+:8: Error: register element index out of range 0 to 1 at operand 1 -- `ldap1 {v2.d}\[-1\],\[sp\]'
+[^:]+:11: Error: register element index out of range 0 to 1 at operand 1 -- `ldap1 {v2.d}\[2\],\[sp\]'
+[^:]+:13: Error: immediate value out of range -256 to 255 at operand 2 -- `ldapur b1,\[x1,#-257\]'
+[^:]+:16: Error: immediate value out of range -256 to 255 at operand 2 -- `ldapur b1,\[x1,#256\]'
+[^:]+:18: Error: immediate value out of range -256 to 255 at operand 2 -- `stlur q1,\[x1,#-257\]'
+[^:]+:21: Error: immediate value out of range -256 to 255 at operand 2 -- `stlur q1,\[x1,#256\]'
+[^:]+:23: Error: invalid addressing mode at operand 2 -- `ldapur b1,\[x1\],#255'
+[^:]+:24: Error: invalid addressing mode at operand 2 -- `ldapur b1,\[x1,#-255\]!'
+[^:]+:26: Error: invalid addressing mode at operand 2 -- `stlur b1,\[x1\],#255'
+[^:]+:27: Error: invalid addressing mode at operand 2 -- `stlur b1,\[x1,#-255\]!'
diff --git a/gas/testsuite/gas/aarch64/rcpc3-fp-fail.s b/gas/testsuite/gas/aarch64/rcpc3-fp-fail.s
new file mode 100644
index 0000000..d5d9200
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rcpc3-fp-fail.s
@@ -0,0 +1,27 @@
+.text
+
+	stl1	{ v1.d }[-1], [x1]	// BAD
+	stl1	{ v1.d }[0], [x1]	// OK
+	stl1	{ v1.d }[1], [x1]	// OK
+	stl1	{ v1.d }[2], [x1]	// BAD
+
+	ldap1	{ v2.d }[-1], [sp]	// BAD
+	ldap1	{ v2.d }[0], [sp]	// OK
+	ldap1	{ v2.d }[1], [sp]	// OK
+	ldap1	{ v2.d }[2], [sp]	// BAD
+
+	ldapur	b1, [x1, #-257]	// BAD
+	ldapur	b1, [x1, #-256]	// OK
+	ldapur	b1, [x1, #255]		// OK
+	ldapur	b1, [x1, #256]		// BAD
+
+	stlur	q1, [x1, #-257]	// BAD
+	stlur	q1, [x1, #-256]	// OK
+	stlur	q1, [x1, #255]		// OK
+	stlur	q1, [x1, #256]		// BAD
+
+	ldapur	b1, [x1], #255		// BAD
+	ldapur	b1, [x1, #-255]!	// BAD
+
+	stlur	b1, [x1], #255		// BAD
+	stlur	b1, [x1, #-255]!	// BAD
diff --git a/gas/testsuite/gas/aarch64/rcpc3-fp.d b/gas/testsuite/gas/aarch64/rcpc3-fp.d
new file mode 100644
index 0000000..b070e42
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rcpc3-fp.d
@@ -0,0 +1,26 @@
+#name: RCPC3 fp load/store
+#as: -march=armv8.2-a+rcpc3
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0+ <.*>:
+   0:	0d4187e1 	ldap1	{v1.d}\[0], \[sp]
+   4:	4d418422 	ldap1	{v2.d}\[1], \[x1]
+   8:	0d018443 	stl1	{v3.d}\[0], \[x2]
+   c:	4d018464 	stl1	{v4.d}\[1], \[x3]
+  10:	1d400be1 	ldapur	b1, \[sp\]
+  14:	1d500be1 	ldapur	b1, \[sp, #-256\]
+  18:	1d4ffbe1 	ldapur	b1, \[sp, #255\]
+  1c:	5d400842 	ldapur	h2, \[x2\]
+  20:	9d400863 	ldapur	s3, \[x3\]
+  24:	dd400884 	ldapur	d4, \[x4\]
+  28:	1dc00be1 	ldapur	q1, \[sp\]
+  2c:	1d000be1 	stlur	b1, \[sp\]
+  30:	1d100be1 	stlur	b1, \[sp, #-256\]
+  34:	1d0ffbe1 	stlur	b1, \[sp, #255\]
+  38:	9d000863 	stlur	s3, \[x3\]
+  3c:	dd000884 	stlur	d4, \[x4\]
+  40:	1d800be1 	stlur	q1, \[sp\]
diff --git a/gas/testsuite/gas/aarch64/rcpc3-fp.s b/gas/testsuite/gas/aarch64/rcpc3-fp.s
new file mode 100644
index 0000000..d99f96d
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rcpc3-fp.s
@@ -0,0 +1,21 @@
+.text
+
+	ldap1 	{v1.d}[0], [sp]
+	ldap1 	{v2.d}[1], [x1]
+	stl1 	{v3.d}[0], [x2]
+	stl1 	{v4.d}[1], [x3]
+
+	ldapur	b1, [sp]
+	ldapur	b1, [sp, #-256]
+	ldapur	b1, [sp, #255]
+	ldapur	h2, [x2]
+	ldapur	s3, [x3]
+	ldapur	d4, [x4]
+	ldapur	q1, [sp]
+
+	stlur	b1, [sp]
+	stlur	b1, [sp, #-256]
+	stlur	b1, [sp, #255]
+	stlur	s3, [x3]
+	stlur	d4, [x4]
+	stlur	q1, [sp]