gas: bpf: new test for MOV with C-like numbers ll suffix

The BPF pseudo-c syntax supports both MOV and LDDW instructions:

    mov:  r1 = EXPR
    lddw: r1 = EXPR ll

Note that the white space between EXPR and `ll' is necessary in order
to avoid ambiguity with the assembler's support for C-like numerical
suffixes.  This patch adds a new test to the GAS BPF testsuite to make
sure that instructions like:

    r1 = 666ll

are interpreted as `mov %r1,666', not as `lddw %r1,666'.

This matches clang's assembler behavior.

2023-10-30  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* testsuite/gas/bpf/alu-pseudoc.s: Add test to make sure C-like
	suffix `ll' is not interpreted as lddw syntax.
	* testsuite/gas/bpf/alu-pseudoc.d: Update expected results.
	* testsuite/gas/bpf/alu-be-pseudoc.d: Likewise.

gas/ChangeLog

@@ -1,3 +1,10 @@
+2023-10-30  Jose E. Marchesi  <jose.marchesi@oracle.com>
+
+	* testsuite/gas/bpf/alu-pseudoc.s: Add test to make sure C-like
+	suffix `ll' is not interpreted as lddw syntax.
+	* testsuite/gas/bpf/alu-pseudoc.d: Update expected results.
+	* testsuite/gas/bpf/alu-be-pseudoc.d: Likewise.
+
 2023-10-02  Nick Clifton  <nickc@redhat.com>
 
 	PR 30861

gas/testsuite/gas/bpf/alu-be-pseudoc.d

@@ -69,3 +69,4 @@ Disassembly of section .text:
  1d0:	d7 10 00 00 00 00 00 10 	r1 = bswap16 r1
  1d8:	d7 20 00 00 00 00 00 20 	r2 = bswap32 r2
  1e0:	d7 30 00 00 00 00 00 40 	r3 = bswap64 r3
+ 1e8:	b7 20 00 00 00 00 02 9a 	r2=0x29a

gas/testsuite/gas/bpf/alu-pseudoc.d

@@ -69,3 +69,4 @@ Disassembly of section .text:
  1d0:	d7 01 00 00 10 00 00 00 	r1 = bswap16 r1
  1d8:	d7 02 00 00 20 00 00 00 	r2 = bswap32 r2
  1e0:	d7 03 00 00 40 00 00 00 	r3 = bswap64 r3
+ 1e8:	b7 02 00 00 9a 02 00 00 	r2=0x29a

gas/testsuite/gas/bpf/alu-pseudoc.s

@@ -61,3 +61,5 @@
         r1 = bswap16 r1
         r2 = bswap32 r2
         r3 = bswap64 r3
+        ;; The following is to be interpreted as a mov, not lddw.
+        r2 = 666ll