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Diffstat (limited to 'disas/libvixl/a64/disasm-a64.cc')
| -rw-r--r-- | disas/libvixl/a64/disasm-a64.cc | 1954 |
1 files changed, 0 insertions, 1954 deletions
diff --git a/disas/libvixl/a64/disasm-a64.cc b/disas/libvixl/a64/disasm-a64.cc deleted file mode 100644 index f7bc2468bb..0000000000 --- a/disas/libvixl/a64/disasm-a64.cc +++ /dev/null @@ -1,1954 +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 <cstdlib> -#include "a64/disasm-a64.h" - -namespace vixl { - -Disassembler::Disassembler() { - buffer_size_ = 256; - buffer_ = reinterpret_cast<char*>(malloc(buffer_size_)); - buffer_pos_ = 0; - own_buffer_ = true; - code_address_offset_ = 0; -} - - -Disassembler::Disassembler(char* text_buffer, int buffer_size) { - buffer_size_ = buffer_size; - buffer_ = text_buffer; - buffer_pos_ = 0; - own_buffer_ = false; - code_address_offset_ = 0; -} - - -Disassembler::~Disassembler() { - if (own_buffer_) { - free(buffer_); - } -} - - -char* Disassembler::GetOutput() { - return buffer_; -} - - -void Disassembler::VisitAddSubImmediate(const Instruction* instr) { - bool rd_is_zr = RdIsZROrSP(instr); - bool stack_op = (rd_is_zr || RnIsZROrSP(instr)) && - (instr->ImmAddSub() == 0) ? true : false; - const char *mnemonic = ""; - const char *form = "'Rds, 'Rns, 'IAddSub"; - const char *form_cmp = "'Rns, 'IAddSub"; - const char *form_mov = "'Rds, 'Rns"; - - switch (instr->Mask(AddSubImmediateMask)) { - case ADD_w_imm: - case ADD_x_imm: { - mnemonic = "add"; - if (stack_op) { - mnemonic = "mov"; - form = form_mov; - } - break; - } - case ADDS_w_imm: - case ADDS_x_imm: { - mnemonic = "adds"; - if (rd_is_zr) { - mnemonic = "cmn"; - form = form_cmp; - } - break; - } - case SUB_w_imm: - case SUB_x_imm: mnemonic = "sub"; break; - case SUBS_w_imm: - case SUBS_x_imm: { - mnemonic = "subs"; - if (rd_is_zr) { - mnemonic = "cmp"; - form = form_cmp; - } - break; - } - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitAddSubShifted(const Instruction* instr) { - bool rd_is_zr = RdIsZROrSP(instr); - bool rn_is_zr = RnIsZROrSP(instr); - const char *mnemonic = ""; - const char *form = "'Rd, 'Rn, 'Rm'HDP"; - const char *form_cmp = "'Rn, 'Rm'HDP"; - const char *form_neg = "'Rd, 'Rm'HDP"; - - switch (instr->Mask(AddSubShiftedMask)) { - case ADD_w_shift: - case ADD_x_shift: mnemonic = "add"; break; - case ADDS_w_shift: - case ADDS_x_shift: { - mnemonic = "adds"; - if (rd_is_zr) { - mnemonic = "cmn"; - form = form_cmp; - } - break; - } - case SUB_w_shift: - case SUB_x_shift: { - mnemonic = "sub"; - if (rn_is_zr) { - mnemonic = "neg"; - form = form_neg; - } - break; - } - case SUBS_w_shift: - case SUBS_x_shift: { - mnemonic = "subs"; - if (rd_is_zr) { - mnemonic = "cmp"; - form = form_cmp; - } else if (rn_is_zr) { - mnemonic = "negs"; - form = form_neg; - } - break; - } - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitAddSubExtended(const Instruction* instr) { - bool rd_is_zr = RdIsZROrSP(instr); - const char *mnemonic = ""; - Extend mode = static_cast<Extend>(instr->ExtendMode()); - const char *form = ((mode == UXTX) || (mode == SXTX)) ? - "'Rds, 'Rns, 'Xm'Ext" : "'Rds, 'Rns, 'Wm'Ext"; - const char *form_cmp = ((mode == UXTX) || (mode == SXTX)) ? - "'Rns, 'Xm'Ext" : "'Rns, 'Wm'Ext"; - - switch (instr->Mask(AddSubExtendedMask)) { - case ADD_w_ext: - case ADD_x_ext: mnemonic = "add"; break; - case ADDS_w_ext: - case ADDS_x_ext: { - mnemonic = "adds"; - if (rd_is_zr) { - mnemonic = "cmn"; - form = form_cmp; - } - break; - } - case SUB_w_ext: - case SUB_x_ext: mnemonic = "sub"; break; - case SUBS_w_ext: - case SUBS_x_ext: { - mnemonic = "subs"; - if (rd_is_zr) { - mnemonic = "cmp"; - form = form_cmp; - } - break; - } - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitAddSubWithCarry(const Instruction* instr) { - bool rn_is_zr = RnIsZROrSP(instr); - const char *mnemonic = ""; - const char *form = "'Rd, 'Rn, 'Rm"; - const char *form_neg = "'Rd, 'Rm"; - - switch (instr->Mask(AddSubWithCarryMask)) { - case ADC_w: - case ADC_x: mnemonic = "adc"; break; - case ADCS_w: - case ADCS_x: mnemonic = "adcs"; break; - case SBC_w: - case SBC_x: { - mnemonic = "sbc"; - if (rn_is_zr) { - mnemonic = "ngc"; - form = form_neg; - } - break; - } - case SBCS_w: - case SBCS_x: { - mnemonic = "sbcs"; - if (rn_is_zr) { - mnemonic = "ngcs"; - form = form_neg; - } - break; - } - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLogicalImmediate(const Instruction* instr) { - bool rd_is_zr = RdIsZROrSP(instr); - bool rn_is_zr = RnIsZROrSP(instr); - const char *mnemonic = ""; - const char *form = "'Rds, 'Rn, 'ITri"; - - if (instr->ImmLogical() == 0) { - // The immediate encoded in the instruction is not in the expected format. - Format(instr, "unallocated", "(LogicalImmediate)"); - return; - } - - switch (instr->Mask(LogicalImmediateMask)) { - case AND_w_imm: - case AND_x_imm: mnemonic = "and"; break; - case ORR_w_imm: - case ORR_x_imm: { - mnemonic = "orr"; - unsigned reg_size = (instr->SixtyFourBits() == 1) ? kXRegSize - : kWRegSize; - if (rn_is_zr && !IsMovzMovnImm(reg_size, instr->ImmLogical())) { - mnemonic = "mov"; - form = "'Rds, 'ITri"; - } - break; - } - case EOR_w_imm: - case EOR_x_imm: mnemonic = "eor"; break; - case ANDS_w_imm: - case ANDS_x_imm: { - mnemonic = "ands"; - if (rd_is_zr) { - mnemonic = "tst"; - form = "'Rn, 'ITri"; - } - break; - } - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -bool Disassembler::IsMovzMovnImm(unsigned reg_size, uint64_t value) { - VIXL_ASSERT((reg_size == kXRegSize) || - ((reg_size == kWRegSize) && (value <= 0xffffffff))); - - // Test for movz: 16 bits set at positions 0, 16, 32 or 48. - if (((value & UINT64_C(0xffffffffffff0000)) == 0) || - ((value & UINT64_C(0xffffffff0000ffff)) == 0) || - ((value & UINT64_C(0xffff0000ffffffff)) == 0) || - ((value & UINT64_C(0x0000ffffffffffff)) == 0)) { - return true; - } - - // Test for movn: NOT(16 bits set at positions 0, 16, 32 or 48). - if ((reg_size == kXRegSize) && - (((~value & UINT64_C(0xffffffffffff0000)) == 0) || - ((~value & UINT64_C(0xffffffff0000ffff)) == 0) || - ((~value & UINT64_C(0xffff0000ffffffff)) == 0) || - ((~value & UINT64_C(0x0000ffffffffffff)) == 0))) { - return true; - } - if ((reg_size == kWRegSize) && - (((value & 0xffff0000) == 0xffff0000) || - ((value & 0x0000ffff) == 0x0000ffff))) { - return true; - } - return false; -} - - -void Disassembler::VisitLogicalShifted(const Instruction* instr) { - bool rd_is_zr = RdIsZROrSP(instr); - bool rn_is_zr = RnIsZROrSP(instr); - const char *mnemonic = ""; - const char *form = "'Rd, 'Rn, 'Rm'HLo"; - - switch (instr->Mask(LogicalShiftedMask)) { - case AND_w: - case AND_x: mnemonic = "and"; break; - case BIC_w: - case BIC_x: mnemonic = "bic"; break; - case EOR_w: - case EOR_x: mnemonic = "eor"; break; - case EON_w: - case EON_x: mnemonic = "eon"; break; - case BICS_w: - case BICS_x: mnemonic = "bics"; break; - case ANDS_w: - case ANDS_x: { - mnemonic = "ands"; - if (rd_is_zr) { - mnemonic = "tst"; - form = "'Rn, 'Rm'HLo"; - } - break; - } - case ORR_w: - case ORR_x: { - mnemonic = "orr"; - if (rn_is_zr && (instr->ImmDPShift() == 0) && (instr->ShiftDP() == LSL)) { - mnemonic = "mov"; - form = "'Rd, 'Rm"; - } - break; - } - case ORN_w: - case ORN_x: { - mnemonic = "orn"; - if (rn_is_zr) { - mnemonic = "mvn"; - form = "'Rd, 'Rm'HLo"; - } - break; - } - default: VIXL_UNREACHABLE(); - } - - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitConditionalCompareRegister(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Rn, 'Rm, 'INzcv, 'Cond"; - - switch (instr->Mask(ConditionalCompareRegisterMask)) { - case CCMN_w: - case CCMN_x: mnemonic = "ccmn"; break; - case CCMP_w: - case CCMP_x: mnemonic = "ccmp"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitConditionalCompareImmediate(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Rn, 'IP, 'INzcv, 'Cond"; - - switch (instr->Mask(ConditionalCompareImmediateMask)) { - case CCMN_w_imm: - case CCMN_x_imm: mnemonic = "ccmn"; break; - case CCMP_w_imm: - case CCMP_x_imm: mnemonic = "ccmp"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitConditionalSelect(const Instruction* instr) { - bool rnm_is_zr = (RnIsZROrSP(instr) && RmIsZROrSP(instr)); - bool rn_is_rm = (instr->Rn() == instr->Rm()); - const char *mnemonic = ""; - const char *form = "'Rd, 'Rn, 'Rm, 'Cond"; - const char *form_test = "'Rd, 'CInv"; - const char *form_update = "'Rd, 'Rn, 'CInv"; - - Condition cond = static_cast<Condition>(instr->Condition()); - bool invertible_cond = (cond != al) && (cond != nv); - - switch (instr->Mask(ConditionalSelectMask)) { - case CSEL_w: - case CSEL_x: mnemonic = "csel"; break; - case CSINC_w: - case CSINC_x: { - mnemonic = "csinc"; - if (rnm_is_zr && invertible_cond) { - mnemonic = "cset"; - form = form_test; - } else if (rn_is_rm && invertible_cond) { - mnemonic = "cinc"; - form = form_update; - } - break; - } - case CSINV_w: - case CSINV_x: { - mnemonic = "csinv"; - if (rnm_is_zr && invertible_cond) { - mnemonic = "csetm"; - form = form_test; - } else if (rn_is_rm && invertible_cond) { - mnemonic = "cinv"; - form = form_update; - } - break; - } - case CSNEG_w: - case CSNEG_x: { - mnemonic = "csneg"; - if (rn_is_rm && invertible_cond) { - mnemonic = "cneg"; - form = form_update; - } - break; - } - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitBitfield(const Instruction* instr) { - unsigned s = instr->ImmS(); - unsigned r = instr->ImmR(); - unsigned rd_size_minus_1 = - ((instr->SixtyFourBits() == 1) ? kXRegSize : kWRegSize) - 1; - const char *mnemonic = ""; - const char *form = ""; - const char *form_shift_right = "'Rd, 'Rn, 'IBr"; - const char *form_extend = "'Rd, 'Wn"; - const char *form_bfiz = "'Rd, 'Rn, 'IBZ-r, 'IBs+1"; - const char *form_bfx = "'Rd, 'Rn, 'IBr, 'IBs-r+1"; - const char *form_lsl = "'Rd, 'Rn, 'IBZ-r"; - - switch (instr->Mask(BitfieldMask)) { - case SBFM_w: - case SBFM_x: { - mnemonic = "sbfx"; - form = form_bfx; - if (r == 0) { - form = form_extend; - if (s == 7) { - mnemonic = "sxtb"; - } else if (s == 15) { - mnemonic = "sxth"; - } else if ((s == 31) && (instr->SixtyFourBits() == 1)) { - mnemonic = "sxtw"; - } else { - form = form_bfx; - } - } else if (s == rd_size_minus_1) { - mnemonic = "asr"; - form = form_shift_right; - } else if (s < r) { - mnemonic = "sbfiz"; - form = form_bfiz; - } - break; - } - case UBFM_w: - case UBFM_x: { - mnemonic = "ubfx"; - form = form_bfx; - if (r == 0) { - form = form_extend; - if (s == 7) { - mnemonic = "uxtb"; - } else if (s == 15) { - mnemonic = "uxth"; - } else { - form = form_bfx; - } - } - if (s == rd_size_minus_1) { - mnemonic = "lsr"; - form = form_shift_right; - } else if (r == s + 1) { - mnemonic = "lsl"; - form = form_lsl; - } else if (s < r) { - mnemonic = "ubfiz"; - form = form_bfiz; - } - break; - } - case BFM_w: - case BFM_x: { - mnemonic = "bfxil"; - form = form_bfx; - if (s < r) { - mnemonic = "bfi"; - form = form_bfiz; - } - } - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitExtract(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Rd, 'Rn, 'Rm, 'IExtract"; - - switch (instr->Mask(ExtractMask)) { - case EXTR_w: - case EXTR_x: { - if (instr->Rn() == instr->Rm()) { - mnemonic = "ror"; - form = "'Rd, 'Rn, 'IExtract"; - } else { - mnemonic = "extr"; - } - break; - } - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitPCRelAddressing(const Instruction* instr) { - switch (instr->Mask(PCRelAddressingMask)) { - case ADR: Format(instr, "adr", "'Xd, 'AddrPCRelByte"); break; - case ADRP: Format(instr, "adrp", "'Xd, 'AddrPCRelPage"); break; - default: Format(instr, "unimplemented", "(PCRelAddressing)"); - } -} - - -void Disassembler::VisitConditionalBranch(const Instruction* instr) { - switch (instr->Mask(ConditionalBranchMask)) { - case B_cond: Format(instr, "b.'CBrn", "'BImmCond"); break; - default: VIXL_UNREACHABLE(); - } -} - - -void Disassembler::VisitUnconditionalBranchToRegister( - const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "'Xn"; - - switch (instr->Mask(UnconditionalBranchToRegisterMask)) { - case BR: mnemonic = "br"; break; - case BLR: mnemonic = "blr"; break; - case RET: { - mnemonic = "ret"; - if (instr->Rn() == kLinkRegCode) { - form = NULL; - } - break; - } - default: form = "(UnconditionalBranchToRegister)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitUnconditionalBranch(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'BImmUncn"; - - switch (instr->Mask(UnconditionalBranchMask)) { - case B: mnemonic = "b"; break; - case BL: mnemonic = "bl"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitDataProcessing1Source(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Rd, 'Rn"; - - switch (instr->Mask(DataProcessing1SourceMask)) { - #define FORMAT(A, B) \ - case A##_w: \ - case A##_x: mnemonic = B; break; - FORMAT(RBIT, "rbit"); - FORMAT(REV16, "rev16"); - FORMAT(REV, "rev"); - FORMAT(CLZ, "clz"); - FORMAT(CLS, "cls"); - #undef FORMAT - case REV32_x: mnemonic = "rev32"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitDataProcessing2Source(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "'Rd, 'Rn, 'Rm"; - - switch (instr->Mask(DataProcessing2SourceMask)) { - #define FORMAT(A, B) \ - case A##_w: \ - case A##_x: mnemonic = B; break; - FORMAT(UDIV, "udiv"); - FORMAT(SDIV, "sdiv"); - FORMAT(LSLV, "lsl"); - FORMAT(LSRV, "lsr"); - FORMAT(ASRV, "asr"); - FORMAT(RORV, "ror"); - #undef FORMAT - default: form = "(DataProcessing2Source)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitDataProcessing3Source(const Instruction* instr) { - bool ra_is_zr = RaIsZROrSP(instr); - const char *mnemonic = ""; - const char *form = "'Xd, 'Wn, 'Wm, 'Xa"; - const char *form_rrr = "'Rd, 'Rn, 'Rm"; - const char *form_rrrr = "'Rd, 'Rn, 'Rm, 'Ra"; - const char *form_xww = "'Xd, 'Wn, 'Wm"; - const char *form_xxx = "'Xd, 'Xn, 'Xm"; - - switch (instr->Mask(DataProcessing3SourceMask)) { - case MADD_w: - case MADD_x: { - mnemonic = "madd"; - form = form_rrrr; - if (ra_is_zr) { - mnemonic = "mul"; - form = form_rrr; - } - break; - } - case MSUB_w: - case MSUB_x: { - mnemonic = "msub"; - form = form_rrrr; - if (ra_is_zr) { - mnemonic = "mneg"; - form = form_rrr; - } - break; - } - case SMADDL_x: { - mnemonic = "smaddl"; - if (ra_is_zr) { - mnemonic = "smull"; - form = form_xww; - } - break; - } - case SMSUBL_x: { - mnemonic = "smsubl"; - if (ra_is_zr) { - mnemonic = "smnegl"; - form = form_xww; - } - break; - } - case UMADDL_x: { - mnemonic = "umaddl"; - if (ra_is_zr) { - mnemonic = "umull"; - form = form_xww; - } - break; - } - case UMSUBL_x: { - mnemonic = "umsubl"; - if (ra_is_zr) { - mnemonic = "umnegl"; - form = form_xww; - } - break; - } - case SMULH_x: { - mnemonic = "smulh"; - form = form_xxx; - break; - } - case UMULH_x: { - mnemonic = "umulh"; - form = form_xxx; - break; - } - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitCompareBranch(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Rt, 'BImmCmpa"; - - switch (instr->Mask(CompareBranchMask)) { - case CBZ_w: - case CBZ_x: mnemonic = "cbz"; break; - case CBNZ_w: - case CBNZ_x: mnemonic = "cbnz"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitTestBranch(const Instruction* instr) { - const char *mnemonic = ""; - // If the top bit of the immediate is clear, the tested register is - // disassembled as Wt, otherwise Xt. As the top bit of the immediate is - // encoded in bit 31 of the instruction, we can reuse the Rt form, which - // uses bit 31 (normally "sf") to choose the register size. - const char *form = "'Rt, 'IS, 'BImmTest"; - - switch (instr->Mask(TestBranchMask)) { - case TBZ: mnemonic = "tbz"; break; - case TBNZ: mnemonic = "tbnz"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitMoveWideImmediate(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Rd, 'IMoveImm"; - - // Print the shift separately for movk, to make it clear which half word will - // be overwritten. Movn and movz print the computed immediate, which includes - // shift calculation. - switch (instr->Mask(MoveWideImmediateMask)) { - case MOVN_w: - case MOVN_x: - if ((instr->ImmMoveWide()) || (instr->ShiftMoveWide() == 0)) { - if ((instr->SixtyFourBits() == 0) && (instr->ImmMoveWide() == 0xffff)) { - mnemonic = "movn"; - } else { - mnemonic = "mov"; - form = "'Rd, 'IMoveNeg"; - } - } else { - mnemonic = "movn"; - } - break; - case MOVZ_w: - case MOVZ_x: - if ((instr->ImmMoveWide()) || (instr->ShiftMoveWide() == 0)) - mnemonic = "mov"; - else - mnemonic = "movz"; - break; - case MOVK_w: - case MOVK_x: mnemonic = "movk"; form = "'Rd, 'IMoveLSL"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -#define LOAD_STORE_LIST(V) \ - V(STRB_w, "strb", "'Wt") \ - V(STRH_w, "strh", "'Wt") \ - V(STR_w, "str", "'Wt") \ - V(STR_x, "str", "'Xt") \ - V(LDRB_w, "ldrb", "'Wt") \ - V(LDRH_w, "ldrh", "'Wt") \ - V(LDR_w, "ldr", "'Wt") \ - V(LDR_x, "ldr", "'Xt") \ - V(LDRSB_x, "ldrsb", "'Xt") \ - V(LDRSH_x, "ldrsh", "'Xt") \ - V(LDRSW_x, "ldrsw", "'Xt") \ - V(LDRSB_w, "ldrsb", "'Wt") \ - V(LDRSH_w, "ldrsh", "'Wt") \ - V(STR_s, "str", "'St") \ - V(STR_d, "str", "'Dt") \ - V(LDR_s, "ldr", "'St") \ - V(LDR_d, "ldr", "'Dt") - -void Disassembler::VisitLoadStorePreIndex(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "(LoadStorePreIndex)"; - - switch (instr->Mask(LoadStorePreIndexMask)) { - #define LS_PREINDEX(A, B, C) \ - case A##_pre: mnemonic = B; form = C ", ['Xns'ILS]!"; break; - LOAD_STORE_LIST(LS_PREINDEX) - #undef LS_PREINDEX - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadStorePostIndex(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "(LoadStorePostIndex)"; - - switch (instr->Mask(LoadStorePostIndexMask)) { - #define LS_POSTINDEX(A, B, C) \ - case A##_post: mnemonic = B; form = C ", ['Xns]'ILS"; break; - LOAD_STORE_LIST(LS_POSTINDEX) - #undef LS_POSTINDEX - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadStoreUnsignedOffset(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "(LoadStoreUnsignedOffset)"; - - switch (instr->Mask(LoadStoreUnsignedOffsetMask)) { - #define LS_UNSIGNEDOFFSET(A, B, C) \ - case A##_unsigned: mnemonic = B; form = C ", ['Xns'ILU]"; break; - LOAD_STORE_LIST(LS_UNSIGNEDOFFSET) - #undef LS_UNSIGNEDOFFSET - case PRFM_unsigned: mnemonic = "prfm"; form = "'PrefOp, ['Xns'ILU]"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadStoreRegisterOffset(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "(LoadStoreRegisterOffset)"; - - switch (instr->Mask(LoadStoreRegisterOffsetMask)) { - #define LS_REGISTEROFFSET(A, B, C) \ - case A##_reg: mnemonic = B; form = C ", ['Xns, 'Offsetreg]"; break; - LOAD_STORE_LIST(LS_REGISTEROFFSET) - #undef LS_REGISTEROFFSET - case PRFM_reg: mnemonic = "prfm"; form = "'PrefOp, ['Xns, 'Offsetreg]"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadStoreUnscaledOffset(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "'Wt, ['Xns'ILS]"; - const char *form_x = "'Xt, ['Xns'ILS]"; - const char *form_s = "'St, ['Xns'ILS]"; - const char *form_d = "'Dt, ['Xns'ILS]"; - const char *form_prefetch = "'PrefOp, ['Xns'ILS]"; - - switch (instr->Mask(LoadStoreUnscaledOffsetMask)) { - case STURB_w: mnemonic = "sturb"; break; - case STURH_w: mnemonic = "sturh"; break; - case STUR_w: mnemonic = "stur"; break; - case STUR_x: mnemonic = "stur"; form = form_x; break; - case STUR_s: mnemonic = "stur"; form = form_s; break; - case STUR_d: mnemonic = "stur"; form = form_d; break; - case LDURB_w: mnemonic = "ldurb"; break; - case LDURH_w: mnemonic = "ldurh"; break; - case LDUR_w: mnemonic = "ldur"; break; - case LDUR_x: mnemonic = "ldur"; form = form_x; break; - case LDUR_s: mnemonic = "ldur"; form = form_s; break; - case LDUR_d: mnemonic = "ldur"; form = form_d; break; - case LDURSB_x: form = form_x; // Fall through. - case LDURSB_w: mnemonic = "ldursb"; break; - case LDURSH_x: form = form_x; // Fall through. - case LDURSH_w: mnemonic = "ldursh"; break; - case LDURSW_x: mnemonic = "ldursw"; form = form_x; break; - case PRFUM: mnemonic = "prfum"; form = form_prefetch; break; - default: form = "(LoadStoreUnscaledOffset)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadLiteral(const Instruction* instr) { - const char *mnemonic = "ldr"; - const char *form = "(LoadLiteral)"; - - switch (instr->Mask(LoadLiteralMask)) { - case LDR_w_lit: form = "'Wt, 'ILLiteral 'LValue"; break; - case LDR_x_lit: form = "'Xt, 'ILLiteral 'LValue"; break; - case LDR_s_lit: form = "'St, 'ILLiteral 'LValue"; break; - case LDR_d_lit: form = "'Dt, 'ILLiteral 'LValue"; break; - case LDRSW_x_lit: { - mnemonic = "ldrsw"; - form = "'Xt, 'ILLiteral 'LValue"; - break; - } - case PRFM_lit: { - mnemonic = "prfm"; - form = "'PrefOp, 'ILLiteral 'LValue"; - break; - } - default: mnemonic = "unimplemented"; - } - Format(instr, mnemonic, form); -} - - -#define LOAD_STORE_PAIR_LIST(V) \ - V(STP_w, "stp", "'Wt, 'Wt2", "4") \ - V(LDP_w, "ldp", "'Wt, 'Wt2", "4") \ - V(LDPSW_x, "ldpsw", "'Xt, 'Xt2", "4") \ - V(STP_x, "stp", "'Xt, 'Xt2", "8") \ - V(LDP_x, "ldp", "'Xt, 'Xt2", "8") \ - V(STP_s, "stp", "'St, 'St2", "4") \ - V(LDP_s, "ldp", "'St, 'St2", "4") \ - V(STP_d, "stp", "'Dt, 'Dt2", "8") \ - V(LDP_d, "ldp", "'Dt, 'Dt2", "8") - -void Disassembler::VisitLoadStorePairPostIndex(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "(LoadStorePairPostIndex)"; - - switch (instr->Mask(LoadStorePairPostIndexMask)) { - #define LSP_POSTINDEX(A, B, C, D) \ - case A##_post: mnemonic = B; form = C ", ['Xns]'ILP" D; break; - LOAD_STORE_PAIR_LIST(LSP_POSTINDEX) - #undef LSP_POSTINDEX - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadStorePairPreIndex(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "(LoadStorePairPreIndex)"; - - switch (instr->Mask(LoadStorePairPreIndexMask)) { - #define LSP_PREINDEX(A, B, C, D) \ - case A##_pre: mnemonic = B; form = C ", ['Xns'ILP" D "]!"; break; - LOAD_STORE_PAIR_LIST(LSP_PREINDEX) - #undef LSP_PREINDEX - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadStorePairOffset(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "(LoadStorePairOffset)"; - - switch (instr->Mask(LoadStorePairOffsetMask)) { - #define LSP_OFFSET(A, B, C, D) \ - case A##_off: mnemonic = B; form = C ", ['Xns'ILP" D "]"; break; - LOAD_STORE_PAIR_LIST(LSP_OFFSET) - #undef LSP_OFFSET - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadStorePairNonTemporal(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form; - - switch (instr->Mask(LoadStorePairNonTemporalMask)) { - case STNP_w: mnemonic = "stnp"; form = "'Wt, 'Wt2, ['Xns'ILP4]"; break; - case LDNP_w: mnemonic = "ldnp"; form = "'Wt, 'Wt2, ['Xns'ILP4]"; break; - case STNP_x: mnemonic = "stnp"; form = "'Xt, 'Xt2, ['Xns'ILP8]"; break; - case LDNP_x: mnemonic = "ldnp"; form = "'Xt, 'Xt2, ['Xns'ILP8]"; break; - case STNP_s: mnemonic = "stnp"; form = "'St, 'St2, ['Xns'ILP4]"; break; - case LDNP_s: mnemonic = "ldnp"; form = "'St, 'St2, ['Xns'ILP4]"; break; - case STNP_d: mnemonic = "stnp"; form = "'Dt, 'Dt2, ['Xns'ILP8]"; break; - case LDNP_d: mnemonic = "ldnp"; form = "'Dt, 'Dt2, ['Xns'ILP8]"; break; - default: form = "(LoadStorePairNonTemporal)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitLoadStoreExclusive(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form; - - switch (instr->Mask(LoadStoreExclusiveMask)) { - case STXRB_w: mnemonic = "stxrb"; form = "'Ws, 'Wt, ['Xns]"; break; - case STXRH_w: mnemonic = "stxrh"; form = "'Ws, 'Wt, ['Xns]"; break; - case STXR_w: mnemonic = "stxr"; form = "'Ws, 'Wt, ['Xns]"; break; - case STXR_x: mnemonic = "stxr"; form = "'Ws, 'Xt, ['Xns]"; break; - case LDXRB_w: mnemonic = "ldxrb"; form = "'Wt, ['Xns]"; break; - case LDXRH_w: mnemonic = "ldxrh"; form = "'Wt, ['Xns]"; break; - case LDXR_w: mnemonic = "ldxr"; form = "'Wt, ['Xns]"; break; - case LDXR_x: mnemonic = "ldxr"; form = "'Xt, ['Xns]"; break; - case STXP_w: mnemonic = "stxp"; form = "'Ws, 'Wt, 'Wt2, ['Xns]"; break; - case STXP_x: mnemonic = "stxp"; form = "'Ws, 'Xt, 'Xt2, ['Xns]"; break; - case LDXP_w: mnemonic = "ldxp"; form = "'Wt, 'Wt2, ['Xns]"; break; - case LDXP_x: mnemonic = "ldxp"; form = "'Xt, 'Xt2, ['Xns]"; break; - case STLXRB_w: mnemonic = "stlxrb"; form = "'Ws, 'Wt, ['Xns]"; break; - case STLXRH_w: mnemonic = "stlxrh"; form = "'Ws, 'Wt, ['Xns]"; break; - case STLXR_w: mnemonic = "stlxr"; form = "'Ws, 'Wt, ['Xns]"; break; - case STLXR_x: mnemonic = "stlxr"; form = "'Ws, 'Xt, ['Xns]"; break; - case LDAXRB_w: mnemonic = "ldaxrb"; form = "'Wt, ['Xns]"; break; - case LDAXRH_w: mnemonic = "ldaxrh"; form = "'Wt, ['Xns]"; break; - case LDAXR_w: mnemonic = "ldaxr"; form = "'Wt, ['Xns]"; break; - case LDAXR_x: mnemonic = "ldaxr"; form = "'Xt, ['Xns]"; break; - case STLXP_w: mnemonic = "stlxp"; form = "'Ws, 'Wt, 'Wt2, ['Xns]"; break; - case STLXP_x: mnemonic = "stlxp"; form = "'Ws, 'Xt, 'Xt2, ['Xns]"; break; - case LDAXP_w: mnemonic = "ldaxp"; form = "'Wt, 'Wt2, ['Xns]"; break; - case LDAXP_x: mnemonic = "ldaxp"; form = "'Xt, 'Xt2, ['Xns]"; break; - case STLRB_w: mnemonic = "stlrb"; form = "'Wt, ['Xns]"; break; - case STLRH_w: mnemonic = "stlrh"; form = "'Wt, ['Xns]"; break; - case STLR_w: mnemonic = "stlr"; form = "'Wt, ['Xns]"; break; - case STLR_x: mnemonic = "stlr"; form = "'Xt, ['Xns]"; break; - case LDARB_w: mnemonic = "ldarb"; form = "'Wt, ['Xns]"; break; - case LDARH_w: mnemonic = "ldarh"; form = "'Wt, ['Xns]"; break; - case LDAR_w: mnemonic = "ldar"; form = "'Wt, ['Xns]"; break; - case LDAR_x: mnemonic = "ldar"; form = "'Xt, ['Xns]"; break; - default: form = "(LoadStoreExclusive)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPCompare(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "'Fn, 'Fm"; - const char *form_zero = "'Fn, #0.0"; - - switch (instr->Mask(FPCompareMask)) { - case FCMP_s_zero: - case FCMP_d_zero: form = form_zero; // Fall through. - case FCMP_s: - case FCMP_d: mnemonic = "fcmp"; break; - default: form = "(FPCompare)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPConditionalCompare(const Instruction* instr) { - const char *mnemonic = "unmplemented"; - const char *form = "'Fn, 'Fm, 'INzcv, 'Cond"; - - switch (instr->Mask(FPConditionalCompareMask)) { - case FCCMP_s: - case FCCMP_d: mnemonic = "fccmp"; break; - case FCCMPE_s: - case FCCMPE_d: mnemonic = "fccmpe"; break; - default: form = "(FPConditionalCompare)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPConditionalSelect(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Fd, 'Fn, 'Fm, 'Cond"; - - switch (instr->Mask(FPConditionalSelectMask)) { - case FCSEL_s: - case FCSEL_d: mnemonic = "fcsel"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPDataProcessing1Source(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "'Fd, 'Fn"; - - switch (instr->Mask(FPDataProcessing1SourceMask)) { - #define FORMAT(A, B) \ - case A##_s: \ - case A##_d: mnemonic = B; break; - FORMAT(FMOV, "fmov"); - FORMAT(FABS, "fabs"); - FORMAT(FNEG, "fneg"); - FORMAT(FSQRT, "fsqrt"); - FORMAT(FRINTN, "frintn"); - FORMAT(FRINTP, "frintp"); - FORMAT(FRINTM, "frintm"); - FORMAT(FRINTZ, "frintz"); - FORMAT(FRINTA, "frinta"); - FORMAT(FRINTX, "frintx"); - FORMAT(FRINTI, "frinti"); - #undef FORMAT - case FCVT_ds: mnemonic = "fcvt"; form = "'Dd, 'Sn"; break; - case FCVT_sd: mnemonic = "fcvt"; form = "'Sd, 'Dn"; break; - default: form = "(FPDataProcessing1Source)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPDataProcessing2Source(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Fd, 'Fn, 'Fm"; - - switch (instr->Mask(FPDataProcessing2SourceMask)) { - #define FORMAT(A, B) \ - case A##_s: \ - case A##_d: mnemonic = B; break; - FORMAT(FMUL, "fmul"); - FORMAT(FDIV, "fdiv"); - FORMAT(FADD, "fadd"); - FORMAT(FSUB, "fsub"); - FORMAT(FMAX, "fmax"); - FORMAT(FMIN, "fmin"); - FORMAT(FMAXNM, "fmaxnm"); - FORMAT(FMINNM, "fminnm"); - FORMAT(FNMUL, "fnmul"); - #undef FORMAT - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPDataProcessing3Source(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Fd, 'Fn, 'Fm, 'Fa"; - - switch (instr->Mask(FPDataProcessing3SourceMask)) { - #define FORMAT(A, B) \ - case A##_s: \ - case A##_d: mnemonic = B; break; - FORMAT(FMADD, "fmadd"); - FORMAT(FMSUB, "fmsub"); - FORMAT(FNMADD, "fnmadd"); - FORMAT(FNMSUB, "fnmsub"); - #undef FORMAT - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPImmediate(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "(FPImmediate)"; - - switch (instr->Mask(FPImmediateMask)) { - case FMOV_s_imm: mnemonic = "fmov"; form = "'Sd, 'IFPSingle"; break; - case FMOV_d_imm: mnemonic = "fmov"; form = "'Dd, 'IFPDouble"; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPIntegerConvert(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "(FPIntegerConvert)"; - const char *form_rf = "'Rd, 'Fn"; - const char *form_fr = "'Fd, 'Rn"; - - switch (instr->Mask(FPIntegerConvertMask)) { - case FMOV_ws: - case FMOV_xd: mnemonic = "fmov"; form = form_rf; break; - case FMOV_sw: - case FMOV_dx: mnemonic = "fmov"; form = form_fr; break; - case FCVTAS_ws: - case FCVTAS_xs: - case FCVTAS_wd: - case FCVTAS_xd: mnemonic = "fcvtas"; form = form_rf; break; - case FCVTAU_ws: - case FCVTAU_xs: - case FCVTAU_wd: - case FCVTAU_xd: mnemonic = "fcvtau"; form = form_rf; break; - case FCVTMS_ws: - case FCVTMS_xs: - case FCVTMS_wd: - case FCVTMS_xd: mnemonic = "fcvtms"; form = form_rf; break; - case FCVTMU_ws: - case FCVTMU_xs: - case FCVTMU_wd: - case FCVTMU_xd: mnemonic = "fcvtmu"; form = form_rf; break; - case FCVTNS_ws: - case FCVTNS_xs: - case FCVTNS_wd: - case FCVTNS_xd: mnemonic = "fcvtns"; form = form_rf; break; - case FCVTNU_ws: - case FCVTNU_xs: - case FCVTNU_wd: - case FCVTNU_xd: mnemonic = "fcvtnu"; form = form_rf; break; - case FCVTZU_xd: - case FCVTZU_ws: - case FCVTZU_wd: - case FCVTZU_xs: mnemonic = "fcvtzu"; form = form_rf; break; - case FCVTZS_xd: - case FCVTZS_wd: - case FCVTZS_xs: - case FCVTZS_ws: mnemonic = "fcvtzs"; form = form_rf; break; - case SCVTF_sw: - case SCVTF_sx: - case SCVTF_dw: - case SCVTF_dx: mnemonic = "scvtf"; form = form_fr; break; - case UCVTF_sw: - case UCVTF_sx: - case UCVTF_dw: - case UCVTF_dx: mnemonic = "ucvtf"; form = form_fr; break; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitFPFixedPointConvert(const Instruction* instr) { - const char *mnemonic = ""; - const char *form = "'Rd, 'Fn, 'IFPFBits"; - const char *form_fr = "'Fd, 'Rn, 'IFPFBits"; - - switch (instr->Mask(FPFixedPointConvertMask)) { - case FCVTZS_ws_fixed: - case FCVTZS_xs_fixed: - case FCVTZS_wd_fixed: - case FCVTZS_xd_fixed: mnemonic = "fcvtzs"; break; - case FCVTZU_ws_fixed: - case FCVTZU_xs_fixed: - case FCVTZU_wd_fixed: - case FCVTZU_xd_fixed: mnemonic = "fcvtzu"; break; - case SCVTF_sw_fixed: - case SCVTF_sx_fixed: - case SCVTF_dw_fixed: - case SCVTF_dx_fixed: mnemonic = "scvtf"; form = form_fr; break; - case UCVTF_sw_fixed: - case UCVTF_sx_fixed: - case UCVTF_dw_fixed: - case UCVTF_dx_fixed: mnemonic = "ucvtf"; form = form_fr; break; - default: VIXL_UNREACHABLE(); - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitSystem(const Instruction* instr) { - // Some system instructions hijack their Op and Cp fields to represent a - // range of immediates instead of indicating a different instruction. This - // makes the decoding tricky. - const char *mnemonic = "unimplemented"; - const char *form = "(System)"; - - if (instr->Mask(SystemExclusiveMonitorFMask) == SystemExclusiveMonitorFixed) { - switch (instr->Mask(SystemExclusiveMonitorMask)) { - case CLREX: { - mnemonic = "clrex"; - form = (instr->CRm() == 0xf) ? NULL : "'IX"; - break; - } - } - } else if (instr->Mask(SystemSysRegFMask) == SystemSysRegFixed) { - switch (instr->Mask(SystemSysRegMask)) { - case MRS: { - mnemonic = "mrs"; - switch (instr->ImmSystemRegister()) { - case NZCV: form = "'Xt, nzcv"; break; - case FPCR: form = "'Xt, fpcr"; break; - default: form = "'Xt, (unknown)"; break; - } - break; - } - case MSR: { - mnemonic = "msr"; - switch (instr->ImmSystemRegister()) { - case NZCV: form = "nzcv, 'Xt"; break; - case FPCR: form = "fpcr, 'Xt"; break; - default: form = "(unknown), 'Xt"; break; - } - break; - } - } - } else if (instr->Mask(SystemHintFMask) == SystemHintFixed) { - switch (instr->ImmHint()) { - case NOP: { - mnemonic = "nop"; - form = NULL; - break; - } - } - } else if (instr->Mask(MemBarrierFMask) == MemBarrierFixed) { - switch (instr->Mask(MemBarrierMask)) { - case DMB: { - mnemonic = "dmb"; - form = "'M"; - break; - } - case DSB: { - mnemonic = "dsb"; - form = "'M"; - break; - } - case ISB: { - mnemonic = "isb"; - form = NULL; - break; - } - } - } - - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitException(const Instruction* instr) { - const char *mnemonic = "unimplemented"; - const char *form = "'IDebug"; - - switch (instr->Mask(ExceptionMask)) { - case HLT: mnemonic = "hlt"; break; - case BRK: mnemonic = "brk"; break; - case SVC: mnemonic = "svc"; break; - case HVC: mnemonic = "hvc"; break; - case SMC: mnemonic = "smc"; break; - case DCPS1: mnemonic = "dcps1"; form = "{'IDebug}"; break; - case DCPS2: mnemonic = "dcps2"; form = "{'IDebug}"; break; - case DCPS3: mnemonic = "dcps3"; form = "{'IDebug}"; break; - default: form = "(Exception)"; - } - Format(instr, mnemonic, form); -} - - -void Disassembler::VisitUnimplemented(const Instruction* instr) { - Format(instr, "unimplemented", "(Unimplemented)"); -} - - -void Disassembler::VisitUnallocated(const Instruction* instr) { - Format(instr, "unallocated", "(Unallocated)"); -} - - -void Disassembler::ProcessOutput(const Instruction* /*instr*/) { - // The base disasm does nothing more than disassembling into a buffer. -} - - -void Disassembler::AppendRegisterNameToOutput(const Instruction* instr, - const CPURegister& reg) { - USE(instr); - VIXL_ASSERT(reg.IsValid()); - char reg_char; - - if (reg.IsRegister()) { - reg_char = reg.Is64Bits() ? 'x' : 'w'; - } else { - VIXL_ASSERT(reg.IsFPRegister()); - reg_char = reg.Is64Bits() ? 'd' : 's'; - } - - if (reg.IsFPRegister() || !(reg.Aliases(sp) || reg.Aliases(xzr))) { - // A normal register: w0 - w30, x0 - x30, s0 - s31, d0 - d31. - AppendToOutput("%c%d", reg_char, reg.code()); - } else if (reg.Aliases(sp)) { - // Disassemble w31/x31 as stack pointer wsp/sp. - AppendToOutput("%s", reg.Is64Bits() ? "sp" : "wsp"); - } else { - // Disassemble w31/x31 as zero register wzr/xzr. - AppendToOutput("%czr", reg_char); - } -} - - -void Disassembler::AppendPCRelativeOffsetToOutput(const Instruction* instr, - int64_t offset) { - USE(instr); - char sign = (offset < 0) ? '-' : '+'; - AppendToOutput("#%c0x%" PRIx64, sign, std::abs(offset)); -} - - -void Disassembler::AppendAddressToOutput(const Instruction* instr, - const void* addr) { - USE(instr); - AppendToOutput("(addr 0x%" PRIxPTR ")", reinterpret_cast<uintptr_t>(addr)); -} - - -void Disassembler::AppendCodeAddressToOutput(const Instruction* instr, - const void* addr) { - AppendAddressToOutput(instr, addr); -} - - -void Disassembler::AppendDataAddressToOutput(const Instruction* instr, - const void* addr) { - AppendAddressToOutput(instr, addr); -} - - -void Disassembler::AppendCodeRelativeAddressToOutput(const Instruction* instr, - const void* addr) { - USE(instr); - int64_t rel_addr = CodeRelativeAddress(addr); - if (rel_addr >= 0) { - AppendToOutput("(addr 0x%" PRIx64 ")", rel_addr); - } else { - AppendToOutput("(addr -0x%" PRIx64 ")", -rel_addr); - } -} - - -void Disassembler::AppendCodeRelativeCodeAddressToOutput( - const Instruction* instr, const void* addr) { - AppendCodeRelativeAddressToOutput(instr, addr); -} - - -void Disassembler::AppendCodeRelativeDataAddressToOutput( - const Instruction* instr, const void* addr) { - AppendCodeRelativeAddressToOutput(instr, addr); -} - - -void Disassembler::MapCodeAddress(int64_t base_address, - const Instruction* instr_address) { - set_code_address_offset( - base_address - reinterpret_cast<intptr_t>(instr_address)); -} -int64_t Disassembler::CodeRelativeAddress(const void* addr) { - return reinterpret_cast<intptr_t>(addr) + code_address_offset(); -} - - -void Disassembler::Format(const Instruction* instr, const char* mnemonic, - const char* format) { - VIXL_ASSERT(mnemonic != NULL); - ResetOutput(); - Substitute(instr, mnemonic); - if (format != NULL) { - buffer_[buffer_pos_++] = ' '; - Substitute(instr, format); - } - buffer_[buffer_pos_] = 0; - ProcessOutput(instr); -} - - -void Disassembler::Substitute(const Instruction* instr, const char* string) { - char chr = *string++; - while (chr != '\0') { - if (chr == '\'') { - string += SubstituteField(instr, string); - } else { - buffer_[buffer_pos_++] = chr; - } - chr = *string++; - } -} - - -int Disassembler::SubstituteField(const Instruction* instr, - const char* format) { - switch (format[0]) { - case 'R': // Register. X or W, selected by sf bit. - case 'F': // FP Register. S or D, selected by type field. - case 'W': - case 'X': - case 'S': - case 'D': return SubstituteRegisterField(instr, format); - case 'I': return SubstituteImmediateField(instr, format); - case 'L': return SubstituteLiteralField(instr, format); - case 'H': return SubstituteShiftField(instr, format); - case 'P': return SubstitutePrefetchField(instr, format); - case 'C': return SubstituteConditionField(instr, format); - case 'E': return SubstituteExtendField(instr, format); - case 'A': return SubstitutePCRelAddressField(instr, format); - case 'B': return SubstituteBranchTargetField(instr, format); - case 'O': return SubstituteLSRegOffsetField(instr, format); - case 'M': return SubstituteBarrierField(instr, format); - default: { - VIXL_UNREACHABLE(); - return 1; - } - } -} - - -int Disassembler::SubstituteRegisterField(const Instruction* instr, - const char* format) { - unsigned reg_num = 0; - unsigned field_len = 2; - switch (format[1]) { - case 'd': reg_num = instr->Rd(); break; - case 'n': reg_num = instr->Rn(); break; - case 'm': reg_num = instr->Rm(); break; - case 'a': reg_num = instr->Ra(); break; - case 's': reg_num = instr->Rs(); break; - case 't': { - if (format[2] == '2') { - reg_num = instr->Rt2(); - field_len = 3; - } else { - reg_num = instr->Rt(); - } - break; - } - default: VIXL_UNREACHABLE(); - } - - // Increase field length for registers tagged as stack. - if (format[2] == 's') { - field_len = 3; - } - - CPURegister::RegisterType reg_type; - unsigned reg_size; - - if (format[0] == 'R') { - // Register type is R: use sf bit to choose X and W. - reg_type = CPURegister::kRegister; - reg_size = instr->SixtyFourBits() ? kXRegSize : kWRegSize; - } else if (format[0] == 'F') { - // Floating-point register: use type field to choose S or D. - reg_type = CPURegister::kFPRegister; - reg_size = ((instr->FPType() & 1) == 0) ? kSRegSize : kDRegSize; - } else { - // The register type is specified. - switch (format[0]) { - case 'W': - reg_type = CPURegister::kRegister; reg_size = kWRegSize; break; - case 'X': - reg_type = CPURegister::kRegister; reg_size = kXRegSize; break; - case 'S': - reg_type = CPURegister::kFPRegister; reg_size = kSRegSize; break; - case 'D': - reg_type = CPURegister::kFPRegister; reg_size = kDRegSize; break; - default: - VIXL_UNREACHABLE(); - reg_type = CPURegister::kRegister; - reg_size = kXRegSize; - } - } - - if ((reg_type == CPURegister::kRegister) && - (reg_num == kZeroRegCode) && (format[2] == 's')) { - reg_num = kSPRegInternalCode; - } - - AppendRegisterNameToOutput(instr, CPURegister(reg_num, reg_size, reg_type)); - - return field_len; -} - - -int Disassembler::SubstituteImmediateField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(format[0] == 'I'); - - switch (format[1]) { - case 'M': { // IMoveImm, IMoveNeg or IMoveLSL. - if (format[5] == 'L') { - AppendToOutput("#0x%" PRIx64, instr->ImmMoveWide()); - if (instr->ShiftMoveWide() > 0) { - AppendToOutput(", lsl #%" PRId64, 16 * instr->ShiftMoveWide()); - } - } else { - VIXL_ASSERT((format[5] == 'I') || (format[5] == 'N')); - uint64_t imm = instr->ImmMoveWide() << (16 * instr->ShiftMoveWide()); - if (format[5] == 'N') - imm = ~imm; - if (!instr->SixtyFourBits()) - imm &= UINT64_C(0xffffffff); - AppendToOutput("#0x%" PRIx64, imm); - } - return 8; - } - case 'L': { - switch (format[2]) { - case 'L': { // ILLiteral - Immediate Load Literal. - AppendToOutput("pc%+" PRId64, - instr->ImmLLiteral() << kLiteralEntrySizeLog2); - return 9; - } - case 'S': { // ILS - Immediate Load/Store. - if (instr->ImmLS() != 0) { - AppendToOutput(", #%" PRId64, instr->ImmLS()); - } - return 3; - } - case 'P': { // ILPx - Immediate Load/Store Pair, x = access size. - if (instr->ImmLSPair() != 0) { - // format[3] is the scale value. Convert to a number. - int scale = format[3] - 0x30; - AppendToOutput(", #%" PRId64, instr->ImmLSPair() * scale); - } - return 4; - } - case 'U': { // ILU - Immediate Load/Store Unsigned. - if (instr->ImmLSUnsigned() != 0) { - AppendToOutput(", #%" PRIu64, - instr->ImmLSUnsigned() << instr->SizeLS()); - } - return 3; - } - } - } - case 'C': { // ICondB - Immediate Conditional Branch. - int64_t offset = instr->ImmCondBranch() << 2; - AppendPCRelativeOffsetToOutput(instr, offset); - return 6; - } - case 'A': { // IAddSub. - VIXL_ASSERT(instr->ShiftAddSub() <= 1); - int64_t imm = instr->ImmAddSub() << (12 * instr->ShiftAddSub()); - AppendToOutput("#0x%" PRIx64 " (%" PRId64 ")", imm, imm); - return 7; - } - case 'F': { // IFPSingle, IFPDouble or IFPFBits. - if (format[3] == 'F') { // IFPFbits. - AppendToOutput("#%" PRId64, 64 - instr->FPScale()); - return 8; - } else { - AppendToOutput("#0x%" PRIx64 " (%.4f)", instr->ImmFP(), - format[3] == 'S' ? instr->ImmFP32() : instr->ImmFP64()); - return 9; - } - } - case 'T': { // ITri - Immediate Triangular Encoded. - AppendToOutput("#0x%" PRIx64, instr->ImmLogical()); - return 4; - } - case 'N': { // INzcv. - int nzcv = (instr->Nzcv() << Flags_offset); - AppendToOutput("#%c%c%c%c", ((nzcv & NFlag) == 0) ? 'n' : 'N', - ((nzcv & ZFlag) == 0) ? 'z' : 'Z', - ((nzcv & CFlag) == 0) ? 'c' : 'C', - ((nzcv & VFlag) == 0) ? 'v' : 'V'); - return 5; - } - case 'P': { // IP - Conditional compare. - AppendToOutput("#%" PRId64, instr->ImmCondCmp()); - return 2; - } - case 'B': { // Bitfields. - return SubstituteBitfieldImmediateField(instr, format); - } - case 'E': { // IExtract. - AppendToOutput("#%" PRId64, instr->ImmS()); - return 8; - } - case 'S': { // IS - Test and branch bit. - AppendToOutput("#%" PRId64, (instr->ImmTestBranchBit5() << 5) | - instr->ImmTestBranchBit40()); - return 2; - } - case 'D': { // IDebug - HLT and BRK instructions. - AppendToOutput("#0x%" PRIx64, instr->ImmException()); - return 6; - } - case 'X': { // IX - CLREX instruction. - AppendToOutput("#0x%" PRIx64, instr->CRm()); - return 2; - } - default: { - VIXL_UNIMPLEMENTED(); - return 0; - } - } -} - - -int Disassembler::SubstituteBitfieldImmediateField(const Instruction* instr, - const char* format) { - VIXL_ASSERT((format[0] == 'I') && (format[1] == 'B')); - unsigned r = instr->ImmR(); - unsigned s = instr->ImmS(); - - switch (format[2]) { - case 'r': { // IBr. - AppendToOutput("#%d", r); - return 3; - } - case 's': { // IBs+1 or IBs-r+1. - if (format[3] == '+') { - AppendToOutput("#%d", s + 1); - return 5; - } else { - VIXL_ASSERT(format[3] == '-'); - AppendToOutput("#%d", s - r + 1); - return 7; - } - } - case 'Z': { // IBZ-r. - VIXL_ASSERT((format[3] == '-') && (format[4] == 'r')); - unsigned reg_size = (instr->SixtyFourBits() == 1) ? kXRegSize : kWRegSize; - AppendToOutput("#%d", reg_size - r); - return 5; - } - default: { - VIXL_UNREACHABLE(); - return 0; - } - } -} - - -int Disassembler::SubstituteLiteralField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(strncmp(format, "LValue", 6) == 0); - USE(format); - - const void * address = instr->LiteralAddress<const void *>(); - switch (instr->Mask(LoadLiteralMask)) { - case LDR_w_lit: - case LDR_x_lit: - case LDRSW_x_lit: - case LDR_s_lit: - case LDR_d_lit: - AppendCodeRelativeDataAddressToOutput(instr, address); - break; - case PRFM_lit: { - // Use the prefetch hint to decide how to print the address. - switch (instr->PrefetchHint()) { - case 0x0: // PLD: prefetch for load. - case 0x2: // PST: prepare for store. - AppendCodeRelativeDataAddressToOutput(instr, address); - break; - case 0x1: // PLI: preload instructions. - AppendCodeRelativeCodeAddressToOutput(instr, address); - break; - case 0x3: // Unallocated hint. - AppendCodeRelativeAddressToOutput(instr, address); - break; - } - break; - } - default: - VIXL_UNREACHABLE(); - } - - return 6; -} - - -int Disassembler::SubstituteShiftField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(format[0] == 'H'); - VIXL_ASSERT(instr->ShiftDP() <= 0x3); - - switch (format[1]) { - case 'D': { // HDP. - VIXL_ASSERT(instr->ShiftDP() != ROR); - } // Fall through. - case 'L': { // HLo. - if (instr->ImmDPShift() != 0) { - const char* shift_type[] = {"lsl", "lsr", "asr", "ror"}; - AppendToOutput(", %s #%" PRId64, shift_type[instr->ShiftDP()], - instr->ImmDPShift()); - } - return 3; - } - default: - VIXL_UNIMPLEMENTED(); - return 0; - } -} - - -int Disassembler::SubstituteConditionField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(format[0] == 'C'); - const char* condition_code[] = { "eq", "ne", "hs", "lo", - "mi", "pl", "vs", "vc", - "hi", "ls", "ge", "lt", - "gt", "le", "al", "nv" }; - int cond; - switch (format[1]) { - case 'B': cond = instr->ConditionBranch(); break; - case 'I': { - cond = InvertCondition(static_cast<Condition>(instr->Condition())); - break; - } - default: cond = instr->Condition(); - } - AppendToOutput("%s", condition_code[cond]); - return 4; -} - - -int Disassembler::SubstitutePCRelAddressField(const Instruction* instr, - const char* format) { - VIXL_ASSERT((strcmp(format, "AddrPCRelByte") == 0) || // Used by `adr`. - (strcmp(format, "AddrPCRelPage") == 0)); // Used by `adrp`. - - int64_t offset = instr->ImmPCRel(); - - // Compute the target address based on the effective address (after applying - // code_address_offset). This is required for correct behaviour of adrp. - const Instruction* base = instr + code_address_offset(); - if (format[9] == 'P') { - offset *= kPageSize; - base = AlignDown(base, kPageSize); - } - // Strip code_address_offset before printing, so we can use the - // semantically-correct AppendCodeRelativeAddressToOutput. - const void* target = - reinterpret_cast<const void*>(base + offset - code_address_offset()); - - AppendPCRelativeOffsetToOutput(instr, offset); - AppendToOutput(" "); - AppendCodeRelativeAddressToOutput(instr, target); - return 13; -} - - -int Disassembler::SubstituteBranchTargetField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(strncmp(format, "BImm", 4) == 0); - - int64_t offset = 0; - switch (format[5]) { - // BImmUncn - unconditional branch immediate. - case 'n': offset = instr->ImmUncondBranch(); break; - // BImmCond - conditional branch immediate. - case 'o': offset = instr->ImmCondBranch(); break; - // BImmCmpa - compare and branch immediate. - case 'm': offset = instr->ImmCmpBranch(); break; - // BImmTest - test and branch immediate. - case 'e': offset = instr->ImmTestBranch(); break; - default: VIXL_UNIMPLEMENTED(); - } - offset <<= kInstructionSizeLog2; - const void* target_address = reinterpret_cast<const void*>(instr + offset); - VIXL_STATIC_ASSERT(sizeof(*instr) == 1); - - AppendPCRelativeOffsetToOutput(instr, offset); - AppendToOutput(" "); - AppendCodeRelativeCodeAddressToOutput(instr, target_address); - - return 8; -} - - -int Disassembler::SubstituteExtendField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(strncmp(format, "Ext", 3) == 0); - VIXL_ASSERT(instr->ExtendMode() <= 7); - USE(format); - - const char* extend_mode[] = { "uxtb", "uxth", "uxtw", "uxtx", - "sxtb", "sxth", "sxtw", "sxtx" }; - - // If rd or rn is SP, uxtw on 32-bit registers and uxtx on 64-bit - // registers becomes lsl. - if (((instr->Rd() == kZeroRegCode) || (instr->Rn() == kZeroRegCode)) && - (((instr->ExtendMode() == UXTW) && (instr->SixtyFourBits() == 0)) || - (instr->ExtendMode() == UXTX))) { - if (instr->ImmExtendShift() > 0) { - AppendToOutput(", lsl #%" PRId64, instr->ImmExtendShift()); - } - } else { - AppendToOutput(", %s", extend_mode[instr->ExtendMode()]); - if (instr->ImmExtendShift() > 0) { - AppendToOutput(" #%" PRId64, instr->ImmExtendShift()); - } - } - return 3; -} - - -int Disassembler::SubstituteLSRegOffsetField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(strncmp(format, "Offsetreg", 9) == 0); - const char* extend_mode[] = { "undefined", "undefined", "uxtw", "lsl", - "undefined", "undefined", "sxtw", "sxtx" }; - USE(format); - - unsigned shift = instr->ImmShiftLS(); - Extend ext = static_cast<Extend>(instr->ExtendMode()); - char reg_type = ((ext == UXTW) || (ext == SXTW)) ? 'w' : 'x'; - - unsigned rm = instr->Rm(); - if (rm == kZeroRegCode) { - AppendToOutput("%czr", reg_type); - } else { - AppendToOutput("%c%d", reg_type, rm); - } - - // Extend mode UXTX is an alias for shift mode LSL here. - if (!((ext == UXTX) && (shift == 0))) { - AppendToOutput(", %s", extend_mode[ext]); - if (shift != 0) { - AppendToOutput(" #%" PRId64, instr->SizeLS()); - } - } - return 9; -} - - -int Disassembler::SubstitutePrefetchField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(format[0] == 'P'); - USE(format); - - static const char* hints[] = {"ld", "li", "st"}; - static const char* stream_options[] = {"keep", "strm"}; - - unsigned hint = instr->PrefetchHint(); - unsigned target = instr->PrefetchTarget() + 1; - unsigned stream = instr->PrefetchStream(); - - if ((hint >= (sizeof(hints) / sizeof(hints[0]))) || (target > 3)) { - // Unallocated prefetch operations. - int prefetch_mode = instr->ImmPrefetchOperation(); - AppendToOutput("#0b%c%c%c%c%c", - (prefetch_mode & (1 << 4)) ? '1' : '0', - (prefetch_mode & (1 << 3)) ? '1' : '0', - (prefetch_mode & (1 << 2)) ? '1' : '0', - (prefetch_mode & (1 << 1)) ? '1' : '0', - (prefetch_mode & (1 << 0)) ? '1' : '0'); - } else { - VIXL_ASSERT(stream < (sizeof(stream_options) / sizeof(stream_options[0]))); - AppendToOutput("p%sl%d%s", hints[hint], target, stream_options[stream]); - } - return 6; -} - -int Disassembler::SubstituteBarrierField(const Instruction* instr, - const char* format) { - VIXL_ASSERT(format[0] == 'M'); - USE(format); - - static const char* options[4][4] = { - { "sy (0b0000)", "oshld", "oshst", "osh" }, - { "sy (0b0100)", "nshld", "nshst", "nsh" }, - { "sy (0b1000)", "ishld", "ishst", "ish" }, - { "sy (0b1100)", "ld", "st", "sy" } - }; - int domain = instr->ImmBarrierDomain(); - int type = instr->ImmBarrierType(); - - AppendToOutput("%s", options[domain][type]); - return 1; -} - -void Disassembler::ResetOutput() { - buffer_pos_ = 0; - buffer_[buffer_pos_] = 0; -} - - -void Disassembler::AppendToOutput(const char* format, ...) { - va_list args; - va_start(args, format); - buffer_pos_ += vsnprintf(&buffer_[buffer_pos_], buffer_size_, format, args); - va_end(args); -} - - -void PrintDisassembler::ProcessOutput(const Instruction* instr) { - fprintf(stream_, "0x%016" PRIx64 " %08" PRIx32 "\t\t%s\n", - reinterpret_cast<uint64_t>(instr), - instr->InstructionBits(), - GetOutput()); -} -} // namespace vixl |