add comment string

[riscv-tests.git] / isa / rv64ui / sv_addw_elwidth.S

diff --git a/isa/rv64ui/sv_addw_elwidth.S b/isa/rv64ui/sv_addw_elwidth.S
index 2a6c40834186681c2b7b7d758ea361103e28ab8f..f616794f581f11e267e5062f77c1b7ecb8eba4d8 100644 (file)
--- a/isa/rv64ui/sv_addw_elwidth.S
+++ b/isa/rv64ui/sv_addw_elwidth.S
@@ -62,6 +62,9 @@ RVTEST_CODE_BEGIN   # Start of test code.
                 0xa5a5006bffabff8b,  0xa5a5a5a5a5a5a5a5,  0xa5a5a5a5a5a5a5a5 )
         SV_ELWIDTH_TEST(  3, 1, 1, 1, 1, 1, 1,
                 0xa5a5a5a5a56bab8b,  0xa5a5a5a5a5a5a5a5,  0xa5a5a5a5a5a5a5a5 )
+
+        # these test a scalar destination, for sign-extension on different
+        # widths of source/dest.
         SV_ELWIDTH_TEST(  3, 0, 0, 0, 1, 1, 0,
                 0xffffffff8b6bab8b,  0xa5a5a5a5a5a5a5a5,  0xa5a5a5a5a5a5a5a5 )
         SV_ELWIDTH_TEST(  3, 3, 3, 3, 1, 1, 0,