dalvik/vm/mterp/arm-vfp/funopWider.S

   1     /*
   2      * Generic 32bit-to-64bit floating point unary operation.  Provide an
   3      * "instr" line that specifies an instruction that performs "d0 = op s0".
   4      *
   5      * For: int-to-double, float-to-double
   6      */
   7     /* unop vA, vB */
   8     mov     r3, rINST, lsr #12          @ r3<- B
   9     mov     r9, rINST, lsr #8           @ r9<- A+
  10     VREG_INDEX_TO_ADDR(r3, r3)          @ r3<- &vB
  11     flds    s0, [r3]                    @ s0<- vB
  12     FETCH_ADVANCE_INST(1)               @ advance rPC, load rINST
  13     and     r9, r9, #15                 @ r9<- A
  14     $instr                              @ d0<- op
  15     GET_INST_OPCODE(ip)                 @ extract opcode from rINST
  16     VREG_INDEX_TO_ADDR(r9, r9)          @ r9<- &vA
  17     fstd    d0, [r9]                    @ vA<- d0
  18     GOTO_OPCODE(ip)                     @ jump to next instruction