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src/cpu/aarch64/vm/stubGenerator_aarch64.cpp
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rev 10234 : 8149907: aarch64: use load/store pair instructions in call_stub
Summary: aarch64: make use of load/store pair instructions in call_stub to save space
Reviewed-by: duke
Contributed-by: felix.yang@linaro.org
@@ -161,34 +161,24 @@
// Call stub stack layout word offsets from fp
enum call_stub_layout {
sp_after_call_off = -26,
d15_off = -26,
- d14_off = -25,
d13_off = -24,
- d12_off = -23,
d11_off = -22,
- d10_off = -21,
d9_off = -20,
- d8_off = -19,
r28_off = -18,
- r27_off = -17,
r26_off = -16,
- r25_off = -15,
r24_off = -14,
- r23_off = -13,
r22_off = -12,
- r21_off = -11,
r20_off = -10,
- r19_off = -9,
call_wrapper_off = -8,
result_off = -7,
result_type_off = -6,
method_off = -5,
entry_point_off = -4,
- parameters_off = -3,
parameter_size_off = -2,
thread_off = -1,
fp_f = 0,
retaddr_off = 1,
};
@@ -206,34 +196,24 @@
const Address call_wrapper (rfp, call_wrapper_off * wordSize);
const Address result (rfp, result_off * wordSize);
const Address result_type (rfp, result_type_off * wordSize);
const Address method (rfp, method_off * wordSize);
const Address entry_point (rfp, entry_point_off * wordSize);
- const Address parameters (rfp, parameters_off * wordSize);
const Address parameter_size(rfp, parameter_size_off * wordSize);
const Address thread (rfp, thread_off * wordSize);
const Address d15_save (rfp, d15_off * wordSize);
- const Address d14_save (rfp, d14_off * wordSize);
const Address d13_save (rfp, d13_off * wordSize);
- const Address d12_save (rfp, d12_off * wordSize);
const Address d11_save (rfp, d11_off * wordSize);
- const Address d10_save (rfp, d10_off * wordSize);
const Address d9_save (rfp, d9_off * wordSize);
- const Address d8_save (rfp, d8_off * wordSize);
const Address r28_save (rfp, r28_off * wordSize);
- const Address r27_save (rfp, r27_off * wordSize);
const Address r26_save (rfp, r26_off * wordSize);
- const Address r25_save (rfp, r25_off * wordSize);
const Address r24_save (rfp, r24_off * wordSize);
- const Address r23_save (rfp, r23_off * wordSize);
const Address r22_save (rfp, r22_off * wordSize);
- const Address r21_save (rfp, r21_off * wordSize);
const Address r20_save (rfp, r20_off * wordSize);
- const Address r19_save (rfp, r19_off * wordSize);
// stub code
// we need a C prolog to bootstrap the x86 caller into the sim
__ c_stub_prolog(8, 0, MacroAssembler::ret_type_void);
@@ -252,35 +232,24 @@
// save register parameters and Java scratch/global registers
// n.b. we save thread even though it gets installed in
// rthread because we want to sanity check rthread later
__ str(c_rarg7, thread);
__ strw(c_rarg6, parameter_size);
- __ str(c_rarg5, parameters);
- __ str(c_rarg4, entry_point);
- __ str(c_rarg3, method);
- __ str(c_rarg2, result_type);
- __ str(c_rarg1, result);
- __ str(c_rarg0, call_wrapper);
- __ str(r19, r19_save);
- __ str(r20, r20_save);
- __ str(r21, r21_save);
- __ str(r22, r22_save);
- __ str(r23, r23_save);
- __ str(r24, r24_save);
- __ str(r25, r25_save);
- __ str(r26, r26_save);
- __ str(r27, r27_save);
- __ str(r28, r28_save);
-
- __ strd(v8, d8_save);
- __ strd(v9, d9_save);
- __ strd(v10, d10_save);
- __ strd(v11, d11_save);
- __ strd(v12, d12_save);
- __ strd(v13, d13_save);
- __ strd(v14, d14_save);
- __ strd(v15, d15_save);
+ __ stp(c_rarg4, c_rarg5, entry_point);
+ __ stp(c_rarg2, c_rarg3, result_type);
+ __ stp(c_rarg0, c_rarg1, call_wrapper);
+
+ __ stp(r20, r19, r20_save);
+ __ stp(r22, r21, r22_save);
+ __ stp(r24, r23, r24_save);
+ __ stp(r26, r25, r26_save);
+ __ stp(r28, r27, r28_save);
+
+ __ stpd(v9, v8, d9_save);
+ __ stpd(v11, v10, d11_save);
+ __ stpd(v13, v12, d13_save);
+ __ stpd(v15, v14, d15_save);
// install Java thread in global register now we have saved
// whatever value it held
__ mov(rthread, c_rarg7);
// And method
@@ -383,37 +352,26 @@
__ BIND(L);
}
#endif
// restore callee-save registers
- __ ldrd(v15, d15_save);
- __ ldrd(v14, d14_save);
- __ ldrd(v13, d13_save);
- __ ldrd(v12, d12_save);
- __ ldrd(v11, d11_save);
- __ ldrd(v10, d10_save);
- __ ldrd(v9, d9_save);
- __ ldrd(v8, d8_save);
-
- __ ldr(r28, r28_save);
- __ ldr(r27, r27_save);
- __ ldr(r26, r26_save);
- __ ldr(r25, r25_save);
- __ ldr(r24, r24_save);
- __ ldr(r23, r23_save);
- __ ldr(r22, r22_save);
- __ ldr(r21, r21_save);
- __ ldr(r20, r20_save);
- __ ldr(r19, r19_save);
- __ ldr(c_rarg0, call_wrapper);
- __ ldr(c_rarg1, result);
+ __ ldpd(v15, v14, d15_save);
+ __ ldpd(v13, v12, d13_save);
+ __ ldpd(v11, v10, d11_save);
+ __ ldpd(v9, v8, d9_save);
+
+ __ ldp(r28, r27, r28_save);
+ __ ldp(r26, r25, r26_save);
+ __ ldp(r24, r23, r24_save);
+ __ ldp(r22, r21, r22_save);
+ __ ldp(r20, r19, r20_save);
+
+ __ ldp(c_rarg0, c_rarg1, call_wrapper);
__ ldrw(c_rarg2, result_type);
__ ldr(c_rarg3, method);
- __ ldr(c_rarg4, entry_point);
- __ ldr(c_rarg5, parameters);
- __ ldr(c_rarg6, parameter_size);
- __ ldr(c_rarg7, thread);
+ __ ldp(c_rarg4, c_rarg5, entry_point);
+ __ ldp(c_rarg6, c_rarg7, parameter_size);
#ifndef PRODUCT
// tell the simulator we are about to end Java execution
if (NotifySimulator) {
__ notify(Assembler::method_exit);
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