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-rw-r--r--libguile/lightening/tests/rshi.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/libguile/lightening/tests/rshi.c b/libguile/lightening/tests/rshi.c
new file mode 100644
index 000000000..0f2cdfda7
--- /dev/null
+++ b/libguile/lightening/tests/rshi.c
@@ -0,0 +1,32 @@
+#include "test.h"
+
+static void
+run_test(jit_state_t *j, uint8_t *arena_base, size_t arena_size)
+{
+ jit_begin(j, arena_base, arena_size);
+
+ const jit_arg_abi_t abi[] = { JIT_ARG_ABI_INTMAX };
+ jit_arg_t args[1];
+ const jit_anyreg_t regs[] = { { .gpr=JIT_R0 } };
+
+ jit_receive(j, 1, abi, args);
+ jit_load_args(j, 1, abi, args, regs);
+
+ jit_rshi(j, JIT_R0, JIT_R0, 31);
+ jit_retr(j, JIT_R0);
+
+ intmax_t (*f)(intmax_t) = jit_end(j, NULL);
+
+#if __WORDSIZE == 32
+ ASSERT(f(0x80000000) == -1);
+#else
+ ASSERT(f(0x80000000) == 1);
+ ASSERT(f(0x8000000000000000) == 0xffffffff00000000);
+#endif
+}
+
+int
+main (int argc, char *argv[])
+{
+ return main_helper(argc, argv, run_test);
+}