diff options
Diffstat (limited to 'vm/mterp/armv6t2/OP_IGET.S')
| -rw-r--r-- | vm/mterp/armv6t2/OP_IGET.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/vm/mterp/armv6t2/OP_IGET.S b/vm/mterp/armv6t2/OP_IGET.S new file mode 100644 index 0000000..f5a21eb --- /dev/null +++ b/vm/mterp/armv6t2/OP_IGET.S @@ -0,0 +1,45 @@ +%default { "load":"ldr", "sqnum":"0" } +%verify "executed" +%verify "null object" +%verify "field already resolved" +%verify "field not yet resolved" +%verify "field cannot be resolved" + /* + * General 32-bit instance field get. + * + * for: iget, iget-object, iget-boolean, iget-byte, iget-char, iget-short + */ + /* op vA, vB, field@CCCC */ + mov r0, rINST, lsr #12 @ r0<- B + ldr r3, [rGLUE, #offGlue_methodClassDex] @ r3<- DvmDex + FETCH(r1, 1) @ r1<- field ref CCCC + ldr r2, [r3, #offDvmDex_pResFields] @ r2<- pDvmDex->pResFields + GET_VREG(r9, r0) @ r9<- fp[B], the object pointer + ldr r0, [r2, r1, lsl #2] @ r0<- resolved InstField ptr + cmp r0, #0 @ is resolved entry null? + bne .L${opcode}_finish @ no, already resolved +8: ldr r2, [rGLUE, #offGlue_method] @ r2<- current method + EXPORT_PC() @ resolve() could throw + ldr r0, [r2, #offMethod_clazz] @ r0<- method->clazz + bl dvmResolveInstField @ r0<- resolved InstField ptr + cmp r0, #0 + bne .L${opcode}_finish + b common_exceptionThrown +%break + + /* + * Currently: + * r0 holds resolved field + * r9 holds object + */ +.L${opcode}_finish: + @bl common_squeak${sqnum} + cmp r9, #0 @ check object for null + ldr r3, [r0, #offInstField_byteOffset] @ r3<- byte offset of field + beq common_errNullObject @ object was null + $load r0, [r9, r3] @ r0<- obj.field (8/16/32 bits) + ubfx r2, rINST, #8, #4 @ r2<- A + FETCH_ADVANCE_INST(2) @ advance rPC, load rINST + GET_INST_OPCODE(ip) @ extract opcode from rINST + SET_VREG(r0, r2) @ fp[A]<- r0 + GOTO_OPCODE(ip) @ jump to next instruction |