isa/rv64uf/structural.S

   1 #*****************************************************************************
   2 # structural.S
   3 #-----------------------------------------------------------------------------
   4 #
   5 # This test verifies that the FPU correctly obviates structural hazards on its
   6 # writeback port (e.g. fadd followed by fsgnj)
   7 #
   8
   9 #include "riscv_test.h"
  10 #include "test_macros.h"
  11
  12 RVTEST_RV64U
  13 RVTEST_CODE_BEGIN
  14
  15 li x25, 1
  16
  17 li x2, 0x3FF0000000000000
  18 li x1, 0x3F800000
  19
  20 #define TEST(nops, errcode)     \
  21   mxtf.d  f4, x0    ;\
  22   mxtf.s  f3, x0    ;\
  23   mxtf.d  f2, x2    ;\
  24   mxtf.s  f1, x1    ;\
  25   b 1f ;\
  26   .align 5        ;\
  27 1:fmul.d  f4, f2, f2  ;\
  28   nops          ;\
  29   fsgnj.s f3, f1, f1 ;\
  30   mftx.d  x4, f4    ;\
  31   mftx.s  x3, f3    ;\
  32   beq     x1, x3, 2f  ;\
  33   RVTEST_FAIL ;\
  34 2:beq     x2, x4, 2f  ;\
  35   RVTEST_FAIL; \
  36 2:mxtf.d  f2, zero    ;\
  37   mxtf.s  f1, zero    ;\
  38
  39 TEST(;,2)
  40 TEST(nop,4)
  41 TEST(nop;nop,6)
  42 TEST(nop;nop;nop,8)
  43 TEST(nop;nop;nop;nop,10)
  44 TEST(nop;nop;nop;nop;nop,12)
  45 TEST(nop;nop;nop;nop;nop;nop,14)
  46
  47 RVTEST_PASS
  48
  49 RVTEST_CODE_END
  50
  51   .data
  52 RVTEST_DATA_BEGIN
  53
  54   TEST_DATA
  55
  56 RVTEST_DATA_END