isa/rv32ui/lbu.S

   1 # See LICENSE for license details.
   2
   3 #*****************************************************************************
   4 # lbu.S
   5 #-----------------------------------------------------------------------------
   6 #
   7 # Test lbu instruction.
   8 #
   9
  10 #include "riscv_test.h"
  11 #include "test_macros.h"
  12
  13 RVTEST_RV32U
  14 RVTEST_CODE_BEGIN
  15
  16   #-------------------------------------------------------------
  17   # Basic tests
  18   #-------------------------------------------------------------
  19
  20   TEST_LD_OP( 2, lbu, 0x000000ff, 0,  tdat );
  21   TEST_LD_OP( 3, lbu, 0x00000000, 1,  tdat );
  22   TEST_LD_OP( 4, lbu, 0x000000f0, 2,  tdat );
  23   TEST_LD_OP( 5, lbu, 0x0000000f, 3, tdat );
  24
  25   # Test with negative offset
  26
  27   TEST_LD_OP( 6, lbu, 0x000000ff, -3, tdat4 );
  28   TEST_LD_OP( 7, lbu, 0x00000000, -2,  tdat4 );
  29   TEST_LD_OP( 8, lbu, 0x000000f0, -1,  tdat4 );
  30   TEST_LD_OP( 9, lbu, 0x0000000f, 0,   tdat4 );
  31
  32   # Test with a negative base
  33
  34   TEST_CASE( 10, x3, 0x000000ff, \
  35     la  x1, tdat; \
  36     addi x1, x1, -32; \
  37     lbu x3, 32(x1); \
  38   )
  39
  40   # Test with unaligned base
  41
  42   TEST_CASE( 11, x3, 0x00000000, \
  43     la  x1, tdat; \
  44     addi x1, x1, -6; \
  45     lbu x3, 7(x1); \
  46   )
  47
  48   #-------------------------------------------------------------
  49   # Bypassing tests
  50   #-------------------------------------------------------------
  51
  52   TEST_LD_DEST_BYPASS( 12, 0, lbu, 0x000000f0, 1, tdat2 );
  53   TEST_LD_DEST_BYPASS( 13, 1, lbu, 0x0000000f, 1, tdat3 );
  54   TEST_LD_DEST_BYPASS( 14, 2, lbu, 0x00000000, 1, tdat1 );
  55
  56   TEST_LD_SRC1_BYPASS( 15, 0, lbu, 0x000000f0, 1, tdat2 );
  57   TEST_LD_SRC1_BYPASS( 16, 1, lbu, 0x0000000f, 1, tdat3 );
  58   TEST_LD_SRC1_BYPASS( 17, 2, lbu, 0x00000000, 1, tdat1 );
  59
  60   #-------------------------------------------------------------
  61   # Test write-after-write hazard
  62   #-------------------------------------------------------------
  63
  64   TEST_CASE( 18, x2, 2, \
  65     la  x3, tdat; \
  66     lbu  x2, 0(x3); \
  67     li  x2, 2; \
  68   )
  69
  70   TEST_CASE( 19, x2, 2, \
  71     la  x3, tdat; \
  72     lbu  x2, 0(x3); \
  73     nop; \
  74     li  x2, 2; \
  75   )
  76
  77   TEST_PASSFAIL
  78
  79 RVTEST_CODE_END
  80
  81   .data
  82 RVTEST_DATA_BEGIN
  83
  84   TEST_DATA
  85
  86 tdat:
  87 tdat1:  .byte 0xff
  88 tdat2:  .byte 0x00
  89 tdat3:  .byte 0xf0
  90 tdat4:  .byte 0x0f
  91
  92 RVTEST_DATA_END