1 files changed, 92 insertions, 0 deletions
diff --git a/tests/lb.S b/tests/lb.S
new file mode 100644
index 0000000..eaf7902
--- /dev/null
+++ b/tests/lb.S
@@ -0,0 +1,92 @@
+# See LICENSE for license details.
+
+#*****************************************************************************
+# lb.S
+#-----------------------------------------------------------------------------
+#
+# Test lb instruction.
+#
+
+#include "riscv_test.h"
+#include "test_macros.h"
+
+RVTEST_RV32U
+RVTEST_CODE_BEGIN
+
+  #-------------------------------------------------------------
+  # Basic tests
+  #-------------------------------------------------------------
+
+  TEST_LD_OP( 2, lb, 0xffffffff, 0,  tdat );
+  TEST_LD_OP( 3, lb, 0x00000000, 1,  tdat );
+  TEST_LD_OP( 4, lb, 0xfffffff0, 2,  tdat );
+  TEST_LD_OP( 5, lb, 0x0000000f, 3, tdat );
+
+  # Test with negative offset
+
+  TEST_LD_OP( 6, lb, 0xffffffff, -3, tdat4 );
+  TEST_LD_OP( 7, lb, 0x00000000, -2,  tdat4 );
+  TEST_LD_OP( 8, lb, 0xfffffff0, -1,  tdat4 );
+  TEST_LD_OP( 9, lb, 0x0000000f, 0,   tdat4 );
+
+  # Test with a negative base
+
+  TEST_CASE( 10, x3, 0xffffffff, \
+    la  x1, tdat; \
+    addi x1, x1, -32; \
+    lb x3, 32(x1); \
+  )
+
+  # Test with unaligned base
+
+  TEST_CASE( 11, x3, 0x00000000, \
+    la  x1, tdat; \
+    addi x1, x1, -6; \
+    lb x3, 7(x1); \
+  )
+
+  #-------------------------------------------------------------
+  # Bypassing tests
+  #-------------------------------------------------------------
+
+  TEST_LD_DEST_BYPASS( 12, 0, lb, 0xfffffff0, 1, tdat2 );
+  TEST_LD_DEST_BYPASS( 13, 1, lb, 0x0000000f, 1, tdat3 );
+  TEST_LD_DEST_BYPASS( 14, 2, lb, 0x00000000, 1, tdat1 );
+
+  TEST_LD_SRC1_BYPASS( 15, 0, lb, 0xfffffff0, 1, tdat2 );
+  TEST_LD_SRC1_BYPASS( 16, 1, lb, 0x0000000f, 1, tdat3 );
+  TEST_LD_SRC1_BYPASS( 17, 2, lb, 0x00000000, 1, tdat1 );
+
+  #-------------------------------------------------------------
+  # Test write-after-write hazard
+  #-------------------------------------------------------------
+
+  TEST_CASE( 18, x2, 2, \
+    la  x3, tdat; \
+    lb  x2, 0(x3); \
+    li  x2, 2; \
+  )
+
+  TEST_CASE( 19, x2, 2, \
+    la  x3, tdat; \
+    lb  x2, 0(x3); \
+    nop; \
+    li  x2, 2; \
+  )
+
+  TEST_PASSFAIL
+
+RVTEST_CODE_END
+
+  .data
+RVTEST_DATA_BEGIN
+
+  TEST_DATA
+
+tdat:
+tdat1:  .byte 0xff
+tdat2:  .byte 0x00
+tdat3:  .byte 0xf0
+tdat4:  .byte 0x0f
+
+RVTEST_DATA_END