%verify "executed" %verify "forward, backward, self" /* * Unconditional branch, 32-bit offset. * * The branch distance is a signed code-unit offset, which we need to * double to get a byte offset. * * Unlike most opcodes, this one is allowed to branch to itself, so * our "backward branch" test must be "<=0" instead of "<0". The ORRS * instruction doesn't affect the V flag, so we need to clear it * explicitly. */ /* goto/32 +AAAAAAAA */ FETCH(r0, 1) @ r0<- aaaa (lo) FETCH(r1, 2) @ r1<- AAAA (hi) cmp ip, ip @ (clear V flag during stall) orrs r0, r0, r1, lsl #16 @ r0<- AAAAaaaa, check sign mov r9, r0, asl #1 @ r9<- byte offset ble common_backwardBranch @ backward branch, do periodic checks #if defined(WITH_JIT) GET_JIT_PROF_TABLE(r0) FETCH_ADVANCE_INST_RB(r9) @ update rPC, load rINST cmp r0,#0 bne common_updateProfile GET_INST_OPCODE(ip) @ extract opcode from rINST GOTO_OPCODE(ip) @ jump to next instruction #else FETCH_ADVANCE_INST_RB(r9) @ update rPC, load rINST GET_INST_OPCODE(ip) @ extract opcode from rINST GOTO_OPCODE(ip) @ jump to next instruction #endif