sim: testsuite: flatten tree

Now that all port tests live under testsuite/sim/*/, and none live
in testsuite/ directly, flatten the structure by moving all of the
dirs under testsuite/sim/ to testsuite/ directly.

We need to stop passing --tool to dejagnu so that it searches all
dirs and not just ones that start with "sim".  Since we have no
other dirs in this tree, and no plans to add any, should be fine.

1 files changed, 44 insertions, 0 deletions

diff --git a/sim/testsuite/bpf/xadd.s b/sim/testsuite/bpf/xadd.s
new file mode 100644
index 0000000..be60714
--- /dev/null
+++ b/sim/testsuite/bpf/xadd.s
@@ -0,0 +1,44 @@
+# mach: bpf
+# output: pass\nexit 0 (0x0)\n
+;;; xadd.s
+;;; Tests for BPF atomic exchange-and-add instructions in simulator
+;;;
+;;; The xadd instructions (XADDW, XADDDW) operate on a memory location
+;;; specified in $dst + offset16, atomically adding the value in $src.
+;;;
+;;; In the simulator, there isn't anything else happening. The atomic
+;;; instructions are identical to a non-atomic load/add/store.
+
+    .include "testutils.inc"
+
+    .text
+    .global main
+    .type main, @function
+main:
+    mov         %r1, 0x1000
+    mov         %r2, 5
+
+    ;; basic xadd w
+    stw         [%r1+0], 10
+    xaddw       [%r1+0], %r2
+    ldxw        %r3, [%r1+0]
+    fail_ne     %r3, 15
+
+    ;; basic xadd dw
+    stdw        [%r1+8], 42
+    xadddw      [%r1+8], %r2
+    ldxdw       %r3, [%r1+8]
+    fail_ne     %r3, 47
+
+    ;; xadd w negative value
+    mov         %r4, -1
+    xaddw       [%r1+0], %r4
+    ldxw        %r3, [%r1+0]
+    fail_ne     %r3, 14
+
+    ;; xadd dw negative val
+    xadddw      [%r1+8], %r4
+    ldxdw       %r3, [%r1+8]
+    fail_ne     %r3, 46
+
+    pass