vm/mterp/mips/zcmp.S

   1 %verify "branch taken"
   2 %verify "branch not taken"
   3     /*
   4      * Generic one-operand compare-and-branch operation.  Provide a "revcmp"
   5      * fragment that specifies the *reverse* comparison to perform, e.g.
   6      * for "if-le" you would use "gt".
   7      *
   8      * for: if-eqz, if-nez, if-ltz, if-gez, if-gtz, if-lez
   9      */
  10     /* if-cmp vAA, +BBBB */
  11     GET_OPA(a0)                            #  a0 <- AA
  12     GET_VREG(a2, a0)                       #  a2 <- vAA
  13     FETCH_S(a1, 1)                         #  a1 <- branch offset, in code units
  14     b${revcmp} a2, zero, 1f                #  branch to 1 if comparison failed
  15     b 2f
  16 1:
  17     li        a1, 2                        #  a1- BYTE branch dist for not-taken
  18 2:
  19     addu      a1, a1, a1                   #  convert to bytes
  20     FETCH_ADVANCE_INST_RB(a1)              #  update rPC, load rINST
  21 #if defined(WITH_JIT)
  22     lw        a0, offThread_pJitProfTable(rSELF)
  23     bgez      a1, 3f
  24     lw        rIBASE, offThread_curHandlerTable(rSELF)  # refresh table base
  25 3:
  26     bnez      a0, common_updateProfile     #  test for JIT off at target
  27 #else
  28     bgez      a1, 4f
  29     lw        rIBASE, offThread_curHandlerTable(rSELF)  # refresh rtable base
  30 4:
  31 #endif
  32     GET_INST_OPCODE(t0)                    #  extract opcode from rINST
  33     GOTO_OPCODE(t0)                        #  jump to next instruction