Ian Rogers | bdb0391 | 2011-09-14 00:55:44 -0700 | [diff] [blame^] | 1 | // Copyright 2011 Google Inc. All Rights Reserved. |
| 2 | |
| 3 | #include "context_arm.h" |
| 4 | |
| 5 | #include "object.h" |
| 6 | |
| 7 | namespace art { |
| 8 | namespace arm { |
| 9 | |
| 10 | ArmContext::ArmContext() { |
| 11 | for (int i=0; i < 16; i++) { |
| 12 | gprs_[i] = 0xEBAD6070; |
| 13 | } |
| 14 | memset(fprs_, 0, sizeof(fprs_)); |
| 15 | } |
| 16 | |
| 17 | void ArmContext::FillCalleeSaves(const Frame& fr) { |
| 18 | Method* method = fr.GetMethod(); |
| 19 | uint32_t core_spills = method->GetCoreSpillMask(); |
| 20 | size_t spill_count = __builtin_popcount(core_spills); |
| 21 | CHECK_EQ(method->GetFpSpillMask(), 0u); |
| 22 | if (spill_count > 0) { |
| 23 | // Lowest number spill is furthest away, walk registers and fill into context |
| 24 | int j = 1; |
| 25 | for(int i = 0; i < 16; i++) { |
| 26 | if (((core_spills >> i) & 1) != 0) { |
| 27 | gprs_[i] = fr.LoadCalleeSave(spill_count - j); |
| 28 | j++; |
| 29 | } |
| 30 | } |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | void ArmContext::DoLongJump() { |
| 35 | // TODO: Load all GPRs and FPRs, currently the code restores registers R4 to PC |
| 36 | asm volatile ( "mov %%r0, %0\n" |
| 37 | "mov %%r1, %1\n" |
| 38 | "ldm %%r0, {%%r4, %%r5, %%r6, %%r7,%%r8,%%r9,%%r10,%%r11,%%r12,%%r13,%%r14}\n" |
| 39 | "mov %%pc,%%r1\n" |
| 40 | : // output |
| 41 | : "r"(&gprs_[4]), "r"(gprs_[R15]) // input |
| 42 | #if 0 // TODO: FPRs.. |
| 43 | "w0" (fprs_[0] ), "w1" (fprs_[1] ), "w2" (fprs_[2] ), "w3" (fprs_[3]), |
| 44 | "w4" (fprs_[4] ), "w5" (fprs_[5] ), "w6" (fprs_[6] ), "w7" (fprs_[7]), |
| 45 | "w8" (fprs_[8] ), "w9" (fprs_[9] ), "w10"(fprs_[10]), "w11"(fprs_[11]), |
| 46 | "w12"(fprs_[12]), "w13"(fprs_[13]), "w14"(fprs_[14]), "w15"(fprs_[15]), |
| 47 | "w16"(fprs_[16]), "w17"(fprs_[17]), "w18"(fprs_[18]), "w19"(fprs_[19]), |
| 48 | "w20"(fprs_[20]), "w21"(fprs_[21]), "w22"(fprs_[22]), "w23"(fprs_[23]), |
| 49 | "w24"(fprs_[24]), "w25"(fprs_[25]), "w26"(fprs_[26]), "w27"(fprs_[27]), |
| 50 | "w28"(fprs_[28]), "w29"(fprs_[29]), "w30"(fprs_[30]), "w31"(fprs_[31]) |
| 51 | #endif |
| 52 | :); // clobber |
| 53 | } |
| 54 | |
| 55 | } // namespace arm |
| 56 | } // namespace art |