1 files changed, 90 insertions, 0 deletions
diff --git a/isa/rv32ui/lwu.S b/isa/rv32ui/lwu.S
new file mode 100644
index 0000000..5804680
--- /dev/null
+++ b/isa/rv32ui/lwu.S
@@ -0,0 +1,90 @@
+#*****************************************************************************
+# lwu.S
+#-----------------------------------------------------------------------------
+#
+# Test lwu instruction.
+#
+
+#include "riscv_test.h"
+#include "test_macros.h"
+
+RVTEST_RV32U
+RVTEST_CODE_BEGIN
+
+  #-------------------------------------------------------------
+  # Basic tests
+  #-------------------------------------------------------------
+
+  TEST_LD_OP( 2, lwu, 0x00ff00ff, 0,  tdat );
+  TEST_LD_OP( 3, lwu, 0xff00ff00, 4,  tdat );
+  TEST_LD_OP( 4, lwu, 0x0ff00ff0, 8,  tdat );
+  TEST_LD_OP( 5, lwu, 0xf00ff00f, 12, tdat );
+
+  # Test with negative offset
+
+  TEST_LD_OP( 6, lwu, 0x00ff00ff, -12, tdat4 );
+  TEST_LD_OP( 7, lwu, 0xff00ff00, -8,  tdat4 );
+  TEST_LD_OP( 8, lwu, 0x0ff00ff0, -4,  tdat4 );
+  TEST_LD_OP( 9, lwu, 0xf00ff00f, 0,   tdat4 );
+
+  # Test with a negative base
+
+  TEST_CASE( 10, x3, 0x00ff00ff, \
+    la  x1, tdat; \
+    addi x1, x1, -32; \
+    lwu x3, 32(x1); \
+  )
+
+  # Test with unaligned base
+
+  TEST_CASE( 11, x3, 0xff00ff00, \
+    la  x1, tdat; \
+    addi x1, x1, -3; \
+    lwu x3, 7(x1); \
+  )
+
+  #-------------------------------------------------------------
+  # Bypassing tests
+  #-------------------------------------------------------------
+
+  TEST_LD_DEST_BYPASS( 12, 0, lwu, 0x0ff00ff0, 4, tdat2 );
+  TEST_LD_DEST_BYPASS( 13, 1, lwu, 0xf00ff00f, 4, tdat3 );
+  TEST_LD_DEST_BYPASS( 14, 2, lwu, 0xff00ff00, 4, tdat1 );
+
+  TEST_LD_SRC1_BYPASS( 15, 0, lwu, 0x0ff00ff0, 4, tdat2 );
+  TEST_LD_SRC1_BYPASS( 16, 1, lwu, 0xf00ff00f, 4, tdat3 );
+  TEST_LD_SRC1_BYPASS( 17, 2, lwu, 0xff00ff00, 4, tdat1 );
+
+  #-------------------------------------------------------------
+  # Test write-after-write hazard
+  #-------------------------------------------------------------
+
+  TEST_CASE( 18, x2, 2, \
+    la  x3, tdat; \
+    lwu x2, 0(x3); \
+    li  x2, 2; \
+  )
+
+  TEST_CASE( 19, x2, 2, \
+    la  x3, tdat; \
+    lwu x2, 0(x3); \
+    nop; \
+    li  x2, 2; \
+  )
+
+  TEST_PASSFAIL
+
+RVTEST_CODE_END
+
+  .data
+RVTEST_DATA_BEGIN
+
+  TEST_DATA
+
+tdat:
+tdat1:  .word 0x00ff00ff
+tdat2:  .word 0xff00ff00
+tdat3:  .word 0x0ff00ff0
+tdat4:  .word 0xf00ff00f
+
+RVTEST_DATA_END