1 %default { "load":"ldr", "sqnum":"0" } 2 %verify "executed" 3 %verify "null object" 4 %verify "field already resolved" 5 %verify "field not yet resolved" 6 %verify "field cannot be resolved" 7 /* 8 * General 32-bit instance field get. 9 * 10 * for: iget, iget-object, iget-boolean, iget-byte, iget-char, iget-short 11 */ 12 /* op vA, vB, field@CCCC */ 13 mov r0, rINST, lsr #12 @ r0<- B 14 ldr r3, [rSELF, #offThread_methodClassDex] @ r3<- DvmDex 15 FETCH(r1, 1) @ r1<- field ref CCCC 16 ldr r2, [r3, #offDvmDex_pResFields] @ r2<- pDvmDex->pResFields 17 GET_VREG(r9, r0) @ r9<- fp[B], the object pointer 18 ldr r0, [r2, r1, lsl #2] @ r0<- resolved InstField ptr 19 cmp r0, #0 @ is resolved entry null? 20 bne .L${opcode}_finish @ no, already resolved 21 8: ldr r2, [rSELF, #offThread_method] @ r2<- current method 22 EXPORT_PC() @ resolve() could throw 23 ldr r0, [r2, #offMethod_clazz] @ r0<- method->clazz 24 bl dvmResolveInstField @ r0<- resolved InstField ptr 25 cmp r0, #0 26 bne .L${opcode}_finish 27 b common_exceptionThrown 28 %break 29 30 /* 31 * Currently: 32 * r0 holds resolved field 33 * r9 holds object 34 */ 35 .L${opcode}_finish: 36 @bl common_squeak${sqnum} 37 cmp r9, #0 @ check object for null 38 ldr r3, [r0, #offInstField_byteOffset] @ r3<- byte offset of field 39 beq common_errNullObject @ object was null 40 $load r0, [r9, r3] @ r0<- obj.field (8/16/32 bits) 41 ubfx r2, rINST, #8, #4 @ r2<- A 42 FETCH_ADVANCE_INST(2) @ advance rPC, load rINST 43 GET_INST_OPCODE(ip) @ extract opcode from rINST 44 SET_VREG(r0, r2) @ fp[A]<- r0 45 GOTO_OPCODE(ip) @ jump to next instruction 46
