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// Copyright 2011 Google Inc. All Rights Reserved.
#include "context_arm.h"
#include "object.h"
namespace art {
namespace arm {
ArmContext::ArmContext() {
#ifndef NDEBUG
// Initialize registers with easy to spot debug values
for (int i=0; i < 16; i++) {
gprs_[i] = 0xEBAD6070+i;
}
for (int i=0; i < 32; i++) {
fprs_[i] = 0xEBAD8070+i;
}
#endif
}
void ArmContext::FillCalleeSaves(const Frame& fr) {
Method* method = fr.GetMethod();
uint32_t core_spills = method->GetCoreSpillMask();
uint32_t fp_core_spills = method->GetFpSpillMask();
size_t spill_count = __builtin_popcount(core_spills);
size_t fp_spill_count = __builtin_popcount(fp_core_spills);
if (spill_count > 0) {
// Lowest number spill is furthest away, walk registers and fill into context
int j = 1;
for(int i = 0; i < 16; i++) {
if (((core_spills >> i) & 1) != 0) {
gprs_[i] = fr.LoadCalleeSave(spill_count - j);
j++;
}
}
}
if (fp_spill_count > 0) {
// Lowest number spill is furthest away, walk registers and fill into context
int j = 1;
for(int i = 0; i < 32; i++) {
if (((fp_core_spills >> i) & 1) != 0) {
fprs_[i] = fr.LoadCalleeSave(spill_count + fp_spill_count - j);
j++;
}
}
}
}
void ArmContext::DoLongJump() {
#if defined(__arm__)
// TODO: Load all GPRs, currently R0 to R3 aren't restored
asm volatile ( "vldm %2, {%%s0-%%s31}\n"
"mov %%r0, %0\n"
"mov %%r1, %1\n"
"ldm %%r0, {%%r4-%%r14}\n"
"mov %%pc,%%r1\n"
: // output
: "r"(&gprs_[4]), "r"(gprs_[R15]), "r"(&fprs_[S0]) // input
:); // clobber
#else
UNIMPLEMENTED(FATAL);
#endif
}
} // namespace arm
} // namespace art
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