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-rw-r--r--isa/rv32ui/lbu.S90
1 files changed, 90 insertions, 0 deletions
diff --git a/isa/rv32ui/lbu.S b/isa/rv32ui/lbu.S
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+#*****************************************************************************
+# lbu.S
+#-----------------------------------------------------------------------------
+#
+# Test lbu instruction.
+#
+
+#include "riscv_test.h"
+#include "test_macros.h"
+
+RVTEST_RV32U
+RVTEST_CODE_BEGIN
+
+ #-------------------------------------------------------------
+ # Basic tests
+ #-------------------------------------------------------------
+
+ TEST_LD_OP( 2, lbu, 0x000000ff, 0, tdat );
+ TEST_LD_OP( 3, lbu, 0x00000000, 1, tdat );
+ TEST_LD_OP( 4, lbu, 0x000000f0, 2, tdat );
+ TEST_LD_OP( 5, lbu, 0x0000000f, 3, tdat );
+
+ # Test with negative offset
+
+ TEST_LD_OP( 6, lbu, 0x000000ff, -3, tdat4 );
+ TEST_LD_OP( 7, lbu, 0x00000000, -2, tdat4 );
+ TEST_LD_OP( 8, lbu, 0x000000f0, -1, tdat4 );
+ TEST_LD_OP( 9, lbu, 0x0000000f, 0, tdat4 );
+
+ # Test with a negative base
+
+ TEST_CASE( 10, x3, 0x000000ff, \
+ la x1, tdat; \
+ addi x1, x1, -32; \
+ lbu x3, 32(x1); \
+ )
+
+ # Test with unaligned base
+
+ TEST_CASE( 11, x3, 0x00000000, \
+ la x1, tdat; \
+ addi x1, x1, -6; \
+ lbu x3, 7(x1); \
+ )
+
+ #-------------------------------------------------------------
+ # Bypassing tests
+ #-------------------------------------------------------------
+
+ TEST_LD_DEST_BYPASS( 12, 0, lbu, 0x000000f0, 1, tdat2 );
+ TEST_LD_DEST_BYPASS( 13, 1, lbu, 0x0000000f, 1, tdat3 );
+ TEST_LD_DEST_BYPASS( 14, 2, lbu, 0x00000000, 1, tdat1 );
+
+ TEST_LD_SRC1_BYPASS( 15, 0, lbu, 0x000000f0, 1, tdat2 );
+ TEST_LD_SRC1_BYPASS( 16, 1, lbu, 0x0000000f, 1, tdat3 );
+ TEST_LD_SRC1_BYPASS( 17, 2, lbu, 0x00000000, 1, tdat1 );
+
+ #-------------------------------------------------------------
+ # Test write-after-write hazard
+ #-------------------------------------------------------------
+
+ TEST_CASE( 18, x2, 2, \
+ la x3, tdat; \
+ lbu x2, 0(x3); \
+ li x2, 2; \
+ )
+
+ TEST_CASE( 19, x2, 2, \
+ la x3, tdat; \
+ lbu 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