context_arm.cc revision bdb0391258abc54bf77c676e36847d28a783bfe5
1bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers// Copyright 2011 Google Inc. All Rights Reserved. 2bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 3bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers#include "context_arm.h" 4bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 5bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers#include "object.h" 6bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 7bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogersnamespace art { 8bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogersnamespace arm { 9bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 10bdb0391258abc54bf77c676e36847d28a783bfe5Ian RogersArmContext::ArmContext() { 11bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers for (int i=0; i < 16; i++) { 12bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers gprs_[i] = 0xEBAD6070; 13bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers } 14bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers memset(fprs_, 0, sizeof(fprs_)); 15bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} 16bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 17bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogersvoid ArmContext::FillCalleeSaves(const Frame& fr) { 18bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers Method* method = fr.GetMethod(); 19bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers uint32_t core_spills = method->GetCoreSpillMask(); 20bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers size_t spill_count = __builtin_popcount(core_spills); 21bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers CHECK_EQ(method->GetFpSpillMask(), 0u); 22bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers if (spill_count > 0) { 23bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers // Lowest number spill is furthest away, walk registers and fill into context 24bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers int j = 1; 25bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers for(int i = 0; i < 16; i++) { 26bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers if (((core_spills >> i) & 1) != 0) { 27bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers gprs_[i] = fr.LoadCalleeSave(spill_count - j); 28bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers j++; 29bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers } 30bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers } 31bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers } 32bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} 33bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 34bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogersvoid ArmContext::DoLongJump() { 35bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers // TODO: Load all GPRs and FPRs, currently the code restores registers R4 to PC 36bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers asm volatile ( "mov %%r0, %0\n" 37bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "mov %%r1, %1\n" 38bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "ldm %%r0, {%%r4, %%r5, %%r6, %%r7,%%r8,%%r9,%%r10,%%r11,%%r12,%%r13,%%r14}\n" 39bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "mov %%pc,%%r1\n" 40bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers : // output 41bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers : "r"(&gprs_[4]), "r"(gprs_[R15]) // input 42bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers#if 0 // TODO: FPRs.. 43bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "w0" (fprs_[0] ), "w1" (fprs_[1] ), "w2" (fprs_[2] ), "w3" (fprs_[3]), 44bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "w4" (fprs_[4] ), "w5" (fprs_[5] ), "w6" (fprs_[6] ), "w7" (fprs_[7]), 45bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "w8" (fprs_[8] ), "w9" (fprs_[9] ), "w10"(fprs_[10]), "w11"(fprs_[11]), 46bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "w12"(fprs_[12]), "w13"(fprs_[13]), "w14"(fprs_[14]), "w15"(fprs_[15]), 47bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "w16"(fprs_[16]), "w17"(fprs_[17]), "w18"(fprs_[18]), "w19"(fprs_[19]), 48bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "w20"(fprs_[20]), "w21"(fprs_[21]), "w22"(fprs_[22]), "w23"(fprs_[23]), 49bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "w24"(fprs_[24]), "w25"(fprs_[25]), "w26"(fprs_[26]), "w27"(fprs_[27]), 50bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers "w28"(fprs_[28]), "w29"(fprs_[29]), "w30"(fprs_[30]), "w31"(fprs_[31]) 51bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers#endif 52bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers :); // clobber 53bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} 54bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 55bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} // namespace arm 56bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} // namespace art 57