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src/hotspot/cpu/aarch64/registerMap_aarch64.cpp

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19  *
20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21  * or visit www.oracle.com if you need additional information or have any
22  * questions.
23  */
24 
25 #include "precompiled.hpp"
26 #include "runtime/registerMap.hpp"
27 #include "vmreg_aarch64.inline.hpp"
28 
29 address RegisterMap::pd_location(VMReg base_reg, int slot_idx) const {
30   if (base_reg->is_FloatRegister()) {
31     // Not all physical slots of an SVE register have corresponding
32     // VMRegs. However they are always saved to the stack in a
33     // contiguous region of memory so we can calculate the address of
34     // the upper slots by offsetting from the base address.
35     assert(base_reg->is_concrete(), "must pass base reg");
36     int base_reg_enc = (base_reg->value() - ConcreteRegisterImpl::max_gpr) /
37                        FloatRegisterImpl::max_slots_per_register;
38     intptr_t offset_in_bytes = slot_idx * VMRegImpl::stack_slot_size;
39     address base_location = location(base_reg);
40     if (base_location != NULL) {
41       return base_location + offset_in_bytes;
42     } else {
43       return NULL;
44     }
45   } else {
46     return location(base_reg->next(slot_idx));
47   }
48 }

19  *
20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21  * or visit www.oracle.com if you need additional information or have any
22  * questions.
23  */
24 
25 #include "precompiled.hpp"
26 #include "runtime/registerMap.hpp"
27 #include "vmreg_aarch64.inline.hpp"
28 
29 address RegisterMap::pd_location(VMReg base_reg, int slot_idx) const {
30   if (base_reg->is_FloatRegister()) {
31     // Not all physical slots of an SVE register have corresponding
32     // VMRegs. However they are always saved to the stack in a
33     // contiguous region of memory so we can calculate the address of
34     // the upper slots by offsetting from the base address.
35     assert(base_reg->is_concrete(), "must pass base reg");
36     int base_reg_enc = (base_reg->value() - ConcreteRegisterImpl::max_gpr) /
37                        FloatRegisterImpl::max_slots_per_register;
38     intptr_t offset_in_bytes = slot_idx * VMRegImpl::stack_slot_size;
39     address base_location = location(base_reg, (intptr_t*)NULL);
40     if (base_location != NULL) {
41       return base_location + offset_in_bytes;
42     } else {
43       return NULL;
44     }
45   } else {
46     return location(base_reg->next(slot_idx), (intptr_t*)NULL);
47   }
48 }
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