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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;
}
#endif
memset(fprs_, 0, sizeof(fprs_));
}
void ArmContext::FillCalleeSaves(const Frame& fr) {
Method* method = fr.GetMethod();
uint32_t core_spills = method->GetCoreSpillMask();
size_t spill_count = __builtin_popcount(core_spills);
CHECK_EQ(method->GetFpSpillMask(), 0u);
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++;
}
}
}
}
void ArmContext::DoLongJump() {
#if defined(__arm__)
// TODO: Load all GPRs and FPRs, currently the code restores registers R4 to PC
asm volatile ( "mov %%r0, %0\n"
"mov %%r1, %1\n"
"ldm %%r0, {%%r4, %%r5, %%r6, %%r7,%%r8,%%r9,%%r10,%%r11,%%r12,%%r13,%%r14}\n"
"mov %%pc,%%r1\n"
: // output
: "r"(&gprs_[4]), "r"(gprs_[R15]) // input
#if 0 // TODO: FPRs..
"w0" (fprs_[0] ), "w1" (fprs_[1] ), "w2" (fprs_[2] ), "w3" (fprs_[3]),
"w4" (fprs_[4] ), "w5" (fprs_[5] ), "w6" (fprs_[6] ), "w7" (fprs_[7]),
"w8" (fprs_[8] ), "w9" (fprs_[9] ), "w10"(fprs_[10]), "w11"(fprs_[11]),
"w12"(fprs_[12]), "w13"(fprs_[13]), "w14"(fprs_[14]), "w15"(fprs_[15]),
"w16"(fprs_[16]), "w17"(fprs_[17]), "w18"(fprs_[18]), "w19"(fprs_[19]),
"w20"(fprs_[20]), "w21"(fprs_[21]), "w22"(fprs_[22]), "w23"(fprs_[23]),
"w24"(fprs_[24]), "w25"(fprs_[25]), "w26"(fprs_[26]), "w27"(fprs_[27]),
"w28"(fprs_[28]), "w29"(fprs_[29]), "w30"(fprs_[30]), "w31"(fprs_[31])
#endif
:); // clobber
#else
UNIMPLEMENTED(FATAL);
#endif
}
} // namespace arm
} // namespace art