isa/rv64ud/structural.S

   1 # See LICENSE for license details.
   2
   3 #*****************************************************************************
   4 # structural.S
   5 #-----------------------------------------------------------------------------
   6 #
   7 # This test verifies that the FPU correctly obviates structural hazards on its
   8 # writeback port (e.g. fadd followed by fsgnj)
   9 #
  10
  11 #include "riscv_test.h"
  12 #include "test_macros.h"
  13
  14 RVTEST_RV64UF
  15 RVTEST_CODE_BEGIN
  16
  17 li x25, 1
  18
  19 li x2, 0x3FF0000000000000
  20 li x1, 0x3F800000
  21
  22 #define TEST(nops, errcode)     \
  23   fmv.d.x  f4, x0    ;\
  24   fmv.s.x  f3, x0    ;\
  25   fmv.d.x  f2, x2    ;\
  26   fmv.s.x  f1, x1    ;\
  27   j 1f ;\
  28   .align 5        ;\
  29 1:fmul.d  f4, f2, f2  ;\
  30   nops          ;\
  31   fsgnj.s f3, f1, f1 ;\
  32   fmv.x.d  x4, f4    ;\
  33   fmv.x.s  x3, f3    ;\
  34   beq     x1, x3, 2f  ;\
  35   RVTEST_FAIL ;\
  36 2:beq     x2, x4, 2f  ;\
  37   RVTEST_FAIL; \
  38 2:fmv.d.x  f2, zero    ;\
  39   fmv.s.x  f1, zero    ;\
  40
  41 TEST(;,2)
  42 TEST(nop,4)
  43 TEST(nop;nop,6)
  44 TEST(nop;nop;nop,8)
  45 TEST(nop;nop;nop;nop,10)
  46 TEST(nop;nop;nop;nop;nop,12)
  47 TEST(nop;nop;nop;nop;nop;nop,14)
  48
  49 RVTEST_PASS
  50
  51 RVTEST_CODE_END
  52
  53   .data
  54 RVTEST_DATA_BEGIN
  55
  56   TEST_DATA
  57
  58 RVTEST_DATA_END