diff options
author | 2016-05-18 13:18:31 +0300 | |
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committer | 2016-05-18 13:42:15 +0300 | |
commit | 437fd90c0250dee670290f9b714253671a990160 (patch) | |
tree | b871786c360704244a07411c69fb58da9ead4a06 /qemu/disas/libvixl/a64/instructions-a64.cc | |
parent | 5bbd6fe9b8bab2a93e548c5a53b032d1939eec05 (diff) |
These changes are the raw update to qemu-2.6.
Collission happened in the following patches:
migration: do cleanup operation after completion(738df5b9)
Bug fix.(1750c932f86)
kvmclock: add a new function to update env->tsc.(b52baab2)
The code provided by the patches was already in the upstreamed
version.
Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'qemu/disas/libvixl/a64/instructions-a64.cc')
-rw-r--r-- | qemu/disas/libvixl/a64/instructions-a64.cc | 314 |
1 files changed, 0 insertions, 314 deletions
diff --git a/qemu/disas/libvixl/a64/instructions-a64.cc b/qemu/disas/libvixl/a64/instructions-a64.cc deleted file mode 100644 index b09188683..000000000 --- a/qemu/disas/libvixl/a64/instructions-a64.cc +++ /dev/null @@ -1,314 +0,0 @@ -// Copyright 2013, ARM Limited -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are met: -// -// * Redistributions of source code must retain the above copyright notice, -// this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above copyright notice, -// this list of conditions and the following disclaimer in the documentation -// and/or other materials provided with the distribution. -// * Neither the name of ARM Limited nor the names of its contributors may be -// used to endorse or promote products derived from this software without -// specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND -// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED -// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE -// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR -// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, -// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -#include "a64/instructions-a64.h" -#include "a64/assembler-a64.h" - -namespace vixl { - - -// Floating-point infinity values. -const float kFP32PositiveInfinity = rawbits_to_float(0x7f800000); -const float kFP32NegativeInfinity = rawbits_to_float(0xff800000); -const double kFP64PositiveInfinity = - rawbits_to_double(UINT64_C(0x7ff0000000000000)); -const double kFP64NegativeInfinity = - rawbits_to_double(UINT64_C(0xfff0000000000000)); - - -// The default NaN values (for FPCR.DN=1). -const double kFP64DefaultNaN = rawbits_to_double(UINT64_C(0x7ff8000000000000)); -const float kFP32DefaultNaN = rawbits_to_float(0x7fc00000); - - -static uint64_t RotateRight(uint64_t value, - unsigned int rotate, - unsigned int width) { - VIXL_ASSERT(width <= 64); - rotate &= 63; - return ((value & ((UINT64_C(1) << rotate) - 1)) << - (width - rotate)) | (value >> rotate); -} - - -static uint64_t RepeatBitsAcrossReg(unsigned reg_size, - uint64_t value, - unsigned width) { - VIXL_ASSERT((width == 2) || (width == 4) || (width == 8) || (width == 16) || - (width == 32)); - VIXL_ASSERT((reg_size == kWRegSize) || (reg_size == kXRegSize)); - uint64_t result = value & ((UINT64_C(1) << width) - 1); - for (unsigned i = width; i < reg_size; i *= 2) { - result |= (result << i); - } - return result; -} - - -bool Instruction::IsLoad() const { - if (Mask(LoadStoreAnyFMask) != LoadStoreAnyFixed) { - return false; - } - - if (Mask(LoadStorePairAnyFMask) == LoadStorePairAnyFixed) { - return Mask(LoadStorePairLBit) != 0; - } else { - LoadStoreOp op = static_cast<LoadStoreOp>(Mask(LoadStoreOpMask)); - switch (op) { - case LDRB_w: - case LDRH_w: - case LDR_w: - case LDR_x: - case LDRSB_w: - case LDRSB_x: - case LDRSH_w: - case LDRSH_x: - case LDRSW_x: - case LDR_s: - case LDR_d: return true; - default: return false; - } - } -} - - -bool Instruction::IsStore() const { - if (Mask(LoadStoreAnyFMask) != LoadStoreAnyFixed) { - return false; - } - - if (Mask(LoadStorePairAnyFMask) == LoadStorePairAnyFixed) { - return Mask(LoadStorePairLBit) == 0; - } else { - LoadStoreOp op = static_cast<LoadStoreOp>(Mask(LoadStoreOpMask)); - switch (op) { - case STRB_w: - case STRH_w: - case STR_w: - case STR_x: - case STR_s: - case STR_d: return true; - default: return false; - } - } -} - - -// Logical immediates can't encode zero, so a return value of zero is used to -// indicate a failure case. Specifically, where the constraints on imm_s are -// not met. -uint64_t Instruction::ImmLogical() const { - unsigned reg_size = SixtyFourBits() ? kXRegSize : kWRegSize; - int64_t n = BitN(); - int64_t imm_s = ImmSetBits(); - int64_t imm_r = ImmRotate(); - - // An integer is constructed from the n, imm_s and imm_r bits according to - // the following table: - // - // N imms immr size S R - // 1 ssssss rrrrrr 64 UInt(ssssss) UInt(rrrrrr) - // 0 0sssss xrrrrr 32 UInt(sssss) UInt(rrrrr) - // 0 10ssss xxrrrr 16 UInt(ssss) UInt(rrrr) - // 0 110sss xxxrrr 8 UInt(sss) UInt(rrr) - // 0 1110ss xxxxrr 4 UInt(ss) UInt(rr) - // 0 11110s xxxxxr 2 UInt(s) UInt(r) - // (s bits must not be all set) - // - // A pattern is constructed of size bits, where the least significant S+1 - // bits are set. The pattern is rotated right by R, and repeated across a - // 32 or 64-bit value, depending on destination register width. - // - - if (n == 1) { - if (imm_s == 0x3F) { - return 0; - } - uint64_t bits = (UINT64_C(1) << (imm_s + 1)) - 1; - return RotateRight(bits, imm_r, 64); - } else { - if ((imm_s >> 1) == 0x1F) { - return 0; - } - for (int width = 0x20; width >= 0x2; width >>= 1) { - if ((imm_s & width) == 0) { - int mask = width - 1; - if ((imm_s & mask) == mask) { - return 0; - } - uint64_t bits = (UINT64_C(1) << ((imm_s & mask) + 1)) - 1; - return RepeatBitsAcrossReg(reg_size, - RotateRight(bits, imm_r & mask, width), - width); - } - } - } - VIXL_UNREACHABLE(); - return 0; -} - - -float Instruction::ImmFP32() const { - // ImmFP: abcdefgh (8 bits) - // Single: aBbb.bbbc.defg.h000.0000.0000.0000.0000 (32 bits) - // where B is b ^ 1 - uint32_t bits = ImmFP(); - uint32_t bit7 = (bits >> 7) & 0x1; - uint32_t bit6 = (bits >> 6) & 0x1; - uint32_t bit5_to_0 = bits & 0x3f; - uint32_t result = (bit7 << 31) | ((32 - bit6) << 25) | (bit5_to_0 << 19); - - return rawbits_to_float(result); -} - - -double Instruction::ImmFP64() const { - // ImmFP: abcdefgh (8 bits) - // Double: aBbb.bbbb.bbcd.efgh.0000.0000.0000.0000 - // 0000.0000.0000.0000.0000.0000.0000.0000 (64 bits) - // where B is b ^ 1 - uint32_t bits = ImmFP(); - uint64_t bit7 = (bits >> 7) & 0x1; - uint64_t bit6 = (bits >> 6) & 0x1; - uint64_t bit5_to_0 = bits & 0x3f; - uint64_t result = (bit7 << 63) | ((256 - bit6) << 54) | (bit5_to_0 << 48); - - return rawbits_to_double(result); -} - - -LSDataSize CalcLSPairDataSize(LoadStorePairOp op) { - switch (op) { - case STP_x: - case LDP_x: - case STP_d: - case LDP_d: return LSDoubleWord; - default: return LSWord; - } -} - - -const Instruction* Instruction::ImmPCOffsetTarget() const { - const Instruction * base = this; - ptrdiff_t offset; - if (IsPCRelAddressing()) { - // ADR and ADRP. - offset = ImmPCRel(); - if (Mask(PCRelAddressingMask) == ADRP) { - base = AlignDown(base, kPageSize); - offset *= kPageSize; - } else { - VIXL_ASSERT(Mask(PCRelAddressingMask) == ADR); - } - } else { - // All PC-relative branches. - VIXL_ASSERT(BranchType() != UnknownBranchType); - // Relative branch offsets are instruction-size-aligned. - offset = ImmBranch() << kInstructionSizeLog2; - } - return base + offset; -} - - -inline int Instruction::ImmBranch() const { - switch (BranchType()) { - case CondBranchType: return ImmCondBranch(); - case UncondBranchType: return ImmUncondBranch(); - case CompareBranchType: return ImmCmpBranch(); - case TestBranchType: return ImmTestBranch(); - default: VIXL_UNREACHABLE(); - } - return 0; -} - - -void Instruction::SetImmPCOffsetTarget(const Instruction* target) { - if (IsPCRelAddressing()) { - SetPCRelImmTarget(target); - } else { - SetBranchImmTarget(target); - } -} - - -void Instruction::SetPCRelImmTarget(const Instruction* target) { - int32_t imm21; - if ((Mask(PCRelAddressingMask) == ADR)) { - imm21 = target - this; - } else { - VIXL_ASSERT(Mask(PCRelAddressingMask) == ADRP); - uintptr_t this_page = reinterpret_cast<uintptr_t>(this) / kPageSize; - uintptr_t target_page = reinterpret_cast<uintptr_t>(target) / kPageSize; - imm21 = target_page - this_page; - } - Instr imm = Assembler::ImmPCRelAddress(imm21); - - SetInstructionBits(Mask(~ImmPCRel_mask) | imm); -} - - -void Instruction::SetBranchImmTarget(const Instruction* target) { - VIXL_ASSERT(((target - this) & 3) == 0); - Instr branch_imm = 0; - uint32_t imm_mask = 0; - int offset = (target - this) >> kInstructionSizeLog2; - switch (BranchType()) { - case CondBranchType: { - branch_imm = Assembler::ImmCondBranch(offset); - imm_mask = ImmCondBranch_mask; - break; - } - case UncondBranchType: { - branch_imm = Assembler::ImmUncondBranch(offset); - imm_mask = ImmUncondBranch_mask; - break; - } - case CompareBranchType: { - branch_imm = Assembler::ImmCmpBranch(offset); - imm_mask = ImmCmpBranch_mask; - break; - } - case TestBranchType: { - branch_imm = Assembler::ImmTestBranch(offset); - imm_mask = ImmTestBranch_mask; - break; - } - default: VIXL_UNREACHABLE(); - } - SetInstructionBits(Mask(~imm_mask) | branch_imm); -} - - -void Instruction::SetImmLLiteral(const Instruction* source) { - VIXL_ASSERT(IsWordAligned(source)); - ptrdiff_t offset = (source - this) >> kLiteralEntrySizeLog2; - Instr imm = Assembler::ImmLLiteral(offset); - Instr mask = ImmLLiteral_mask; - - SetInstructionBits(Mask(~mask) | imm); -} -} // namespace vixl - |