bpf: xBPF SDIV, SMOD instructions

Add gas and opcodes support for two xBPF-exclusive ALU operations:
SDIV (signed division) and SMOD (signed modulo), and add tests for
them in gas.

cpu/
	* bpf.cpu (insn-op-code-alu): Add SDIV and SMOD.
	(define-alu-insn-bin, daib): Take ISAs as an argument.
	(define-alu-instructions): Update calls to daib pmacro with
	ISAs; add sdiv and smod.

gas/
	* testsuite/gas/bpf/alu-xbpf.d: New file.
	* testsuite/gas/bpf/alu-xbpf.s: Likewise.
	* testsuite/gas/bpf/alu32-xbpf.d: Likewise.
	* testsuite/gas/bpf/alu32-xbpf.d: Likewise.
	* testuiste/gas/bpf/bpf.exp: Run new tests.

opcodes/
	* bpf-desc.c: Regenerate.
	* bpf-desc.h: Likewise.
	* bpf-opc.c: Likewise.
	* bpf-opc.h: Likewise.

6 files changed, 67 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 057feeb..cad6b5c 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,11 @@
+2020-09-018  David Faust  <david.faust@oracle.com>
+
+	* testsuite/gas/bpf/alu-xbpf.d: New file.
+	* testsuite/gas/bpf/alu-xbpf.s: Likewise.
+	* testsuite/gas/bpf/alu32-xbpf.d: Likewise.
+	* testsuite/gas/bpf/alu32-xbpf.d: Likewise.
+	* testuiste/gas/bpf/bpf.exp: Run new tests.
+
 2020-09-18  Tucker  <tuckkern+sourceware@gmail.com>
 
 	PR 26556
diff --git a/gas/testsuite/gas/bpf/alu-xbpf.d b/gas/testsuite/gas/bpf/alu-xbpf.d
new file mode 100644
index 0000000..7f97d49
--- /dev/null
+++ b/gas/testsuite/gas/bpf/alu-xbpf.d
@@ -0,0 +1,17 @@
+#as: --EL -mxbpf
+#objdump: -dr -mxbpf
+#name: xBPF ALU64 insns
+
+.*: +file format .*bpf.*
+
+Disassembly of section \.text:
+
+0+ <\.text>:
+   0:	e7 02 00 00 02 00 00 00 	sdiv %r2,2
+   8:	e7 03 00 00 fd ff ff ff 	sdiv %r3,-3
+  10:	e7 04 00 00 ef be ad 7e 	sdiv %r4,0x7eadbeef
+  18:	ef 25 00 00 00 00 00 00 	sdiv %r5,%r2
+  20:	f7 02 00 00 03 00 00 00 	smod %r2,3
+  28:	f7 03 00 00 fc ff ff ff 	smod %r3,-4
+  30:	f7 04 00 00 ef be ad 7e 	smod %r4,0x7eadbeef
+  38:	ff 25 00 00 00 00 00 00 	smod %r5,%r2
diff --git a/gas/testsuite/gas/bpf/alu-xbpf.s b/gas/testsuite/gas/bpf/alu-xbpf.s
new file mode 100644
index 0000000..ebcebd7
--- /dev/null
+++ b/gas/testsuite/gas/bpf/alu-xbpf.s
@@ -0,0 +1,11 @@
+    # Tests for xBPF-specific alu instructions
+    .text
+    sdiv %r2, 2
+    sdiv %r3, -3
+    sdiv %r4, 0x7eadbeef
+    sdiv %r5, %r2
+
+    smod %r2, 3
+    smod %r3, -4
+    smod %r4, 0x7eadbeef
+    smod %r5, %r2
diff --git a/gas/testsuite/gas/bpf/alu32-xbpf.d b/gas/testsuite/gas/bpf/alu32-xbpf.d
new file mode 100644
index 0000000..03411d6
--- /dev/null
+++ b/gas/testsuite/gas/bpf/alu32-xbpf.d
@@ -0,0 +1,17 @@
+#as: --EL -mxbpf
+#objdump: -dr -mxbpf
+#name: xBPF ALU32 insns
+
+.*: +file format .*bpf.*
+
+Disassembly of section \.text:
+
+0+ <\.text>:
+   0:	e4 02 00 00 02 00 00 00 	sdiv32 %r2,2
+   8:	e4 03 00 00 fd ff ff ff 	sdiv32 %r3,-3
+  10:	e4 04 00 00 ef be ad 7e 	sdiv32 %r4,0x7eadbeef
+  18:	ec 25 00 00 00 00 00 00 	sdiv32 %r5,%r2
+  20:	f4 02 00 00 03 00 00 00 	smod32 %r2,3
+  28:	f4 03 00 00 fc ff ff ff 	smod32 %r3,-4
+  30:	f4 04 00 00 ef be ad 7e 	smod32 %r4,0x7eadbeef
+  38:	fc 25 00 00 00 00 00 00 	smod32 %r5,%r2
diff --git a/gas/testsuite/gas/bpf/alu32-xbpf.s b/gas/testsuite/gas/bpf/alu32-xbpf.s
new file mode 100644
index 0000000..9ce5a26
--- /dev/null
+++ b/gas/testsuite/gas/bpf/alu32-xbpf.s
@@ -0,0 +1,11 @@
+    # Tests for xBPF-specific alu instructions
+    .text
+    sdiv32 %r2, 2
+    sdiv32 %r3, -3
+    sdiv32 %r4, 0x7eadbeef
+    sdiv32 %r5, %r2
+
+    smod32 %r2, 3
+    smod32 %r3, -4
+    smod32 %r4, 0x7eadbeef
+    smod32 %r5, %r2
diff --git a/gas/testsuite/gas/bpf/bpf.exp b/gas/testsuite/gas/bpf/bpf.exp
index 242b190..f7c04f4 100644
--- a/gas/testsuite/gas/bpf/bpf.exp
+++ b/gas/testsuite/gas/bpf/bpf.exp
@@ -41,4 +41,7 @@ if {[istarget bpf*-*-*]} {
 
     run_dump_test indcall-1
     run_list_test indcall-bad-1
+
+    run_dump_test alu-xbpf
+    run_dump_test alu32-xbpf
 }