| // -*- mode:c++ -*- |
| |
| // Copyright (c) 2010,2019 ARM Limited |
| // All rights reserved |
| // |
| // The license below extends only to copyright in the software and shall |
| // not be construed as granting a license to any other intellectual |
| // property including but not limited to intellectual property relating |
| // to a hardware implementation of the functionality of the software |
| // licensed hereunder. You may use the software subject to the license |
| // terms below provided that you ensure that this notice is replicated |
| // unmodified and in its entirety in all distributions of the software, |
| // modified or unmodified, in source code or in binary form. |
| // |
| // Copyright (c) 2007-2008 The Florida State University |
| // 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 the copyright holders 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 AND 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. |
| |
| def format AddrMode2(imm) {{ |
| if eval(imm): |
| imm = True |
| else: |
| imm = False |
| |
| def buildPUBWLCase(p, u, b, w, l): |
| return (p << 4) + (u << 3) + (b << 2) + (w << 1) + (l << 0) |
| |
| header_output = decoder_output = exec_output = "" |
| decode_block = "switch(PUBWL) {\n" |
| |
| # Loop over all the values of p, u, b, w and l and build instructions and |
| # a decode block for them. |
| for p in (0, 1): |
| for u in (0, 1): |
| for b in (0, 1): |
| for w in (0, 1): |
| post = (p == 0) |
| user = (p == 0 and w == 1) |
| writeback = (p == 0 or w == 1) |
| add = (u == 1) |
| if b == 0: |
| size = 4 |
| else: |
| size = 1 |
| if add: |
| addStr = "true" |
| else: |
| addStr = "false" |
| if imm: |
| newDecode = "return new %s(machInst, RD, RN," + \ |
| "%s, machInst.immed11_0);" |
| loadClass = loadImmClassName(post, add, writeback, |
| size, False, user) |
| storeClass = storeImmClassName(post, add, writeback, |
| size, False, user) |
| loadDecode = newDecode % (loadClass, addStr) |
| storeDecode = newDecode % (storeClass, addStr) |
| else: |
| newDecode = "return new %s(machInst, RD, RN, %s," + \ |
| "machInst.shiftSize," + \ |
| "machInst.shift, RM);" |
| loadClass = loadRegClassName(post, add, writeback, |
| size, False, user) |
| storeClass = storeRegClassName(post, add, writeback, |
| size, False, user) |
| loadDecode = newDecode % (loadClass, addStr) |
| storeDecode = newDecode % (storeClass, addStr) |
| decode = ''' |
| case %#x: |
| {%s} |
| break; |
| ''' |
| decode_block += decode % \ |
| (buildPUBWLCase(p,u,b,w,1), loadDecode) |
| decode_block += decode % \ |
| (buildPUBWLCase(p,u,b,w,0), storeDecode) |
| decode_block += ''' |
| default: |
| return new Unknown(machInst); |
| break; |
| }''' |
| }}; |
| |
| def format AddrMode3() {{ |
| decode = ''' |
| { |
| const uint32_t op1 = bits(machInst, 24, 20); |
| const uint32_t op2 = bits(machInst, 6, 5); |
| const uint32_t puiw = bits(machInst, 24, 21); |
| const uint32_t imm = IMMED_HI_11_8 << 4 | IMMED_LO_3_0; |
| switch (op2) { |
| case 0x1: |
| if (op1 & 0x1) { |
| %(ldrh)s |
| } else { |
| %(strh)s |
| } |
| case 0x2: |
| if (op1 & 0x1) { |
| %(ldrsb)s |
| } else if ((RT %% 2) == 0) { |
| %(ldrd)s |
| } else { |
| return new Unknown(machInst); |
| } |
| case 0x3: |
| if (op1 & 0x1) { |
| %(ldrsh)s |
| } else { |
| %(strd)s |
| } |
| default: |
| return new Unknown(machInst); |
| } |
| } |
| ''' |
| |
| def decodePuiwCase(load, d, p, u, i, w, size=4, sign=False): |
| post = (p == 0) |
| user = (p == 0 and w == 1) |
| writeback = (p == 0 or w == 1) |
| add = (u == 1) |
| caseVal = (p << 3) + (u << 2) + (i << 1) + (w << 0) |
| decode = ''' |
| case %#x: |
| return new '''% caseVal |
| if add: |
| addStr = "true" |
| else: |
| addStr = "false" |
| if d: |
| dests = "RT & ~1, RT | 1" |
| else: |
| dests = "RT" |
| if i: |
| if load: |
| if d: |
| className = loadDoubleImmClassName(post, add, writeback) |
| else: |
| className = loadImmClassName(post, add, writeback, \ |
| size=size, sign=sign, \ |
| user=user) |
| else: |
| if d: |
| className = storeDoubleImmClassName(post, add, writeback) |
| else: |
| className = storeImmClassName(post, add, writeback, \ |
| size=size, sign=sign, \ |
| user=user) |
| decode += ("%s(machInst, %s, RN, %s, imm);\n" % \ |
| (className, dests, addStr)) |
| else: |
| if load: |
| if d: |
| className = loadDoubleRegClassName(post, add, writeback) |
| else: |
| className = loadRegClassName(post, add, writeback, \ |
| size=size, sign=sign, \ |
| user=user) |
| else: |
| if d: |
| className = storeDoubleRegClassName(post, add, writeback) |
| else: |
| className = storeRegClassName(post, add, writeback, \ |
| size=size, sign=sign, \ |
| user=user) |
| decode += ("%s(machInst, %s, RN, %s, 0, LSL, RM);\n" % \ |
| (className, dests, addStr)) |
| return decode |
| |
| def decodePuiw(load, d, size=4, sign=False): |
| global decodePuiwCase |
| decode = "switch (puiw) {\n" |
| for p in (0, 1): |
| for u in (0, 1): |
| for i in (0, 1): |
| for w in (0, 1): |
| decode += decodePuiwCase(load, d, p, u, i, w, |
| size, sign) |
| decode += ''' |
| default: |
| return new Unknown(machInst); |
| } |
| ''' |
| return decode |
| |
| subs = { |
| "ldrh" : decodePuiw(True, False, size=2), |
| "strh" : decodePuiw(False, False, size=2), |
| "ldrsb" : decodePuiw(True, False, size=1, sign=True), |
| "ldrd" : decodePuiw(True, True), |
| "ldrsh" : decodePuiw(True, False, size=2, sign=True), |
| "strd" : decodePuiw(False, True) |
| } |
| decode_block = decode % subs |
| }}; |
| |
| def format ArmSyncMem() {{ |
| decode_block = ''' |
| { |
| const IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 19, 16); |
| const IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 15, 12); |
| const IntRegIndex rt2 = (IntRegIndex)(uint32_t)bits(machInst, 3, 0); |
| |
| const auto type_L = bits(machInst, 22, 20); |
| const auto ex_ord = bits(machInst, 9, 8); |
| const auto dec_fields = (type_L << 2) | ex_ord; |
| |
| switch (dec_fields) { |
| case 0x00: |
| return new %(stl)s(machInst, rt, rn, true, 0); |
| case 0x02: |
| return new %(stlex)s(machInst, rt, rt2, rn, true, 0); |
| case 0x03: |
| return new %(strex)s(machInst, rt, rt2, rn, true, 0); |
| case 0x04: |
| return new %(lda)s(machInst, rt, rn, true, 0); |
| case 0x06: |
| return new %(ldaex)s(machInst, rt, rn, true, 0); |
| case 0x07: |
| return new %(ldrex)s(machInst, rt, rn, true, 0); |
| case 0x0a: |
| return new %(stlexd)s(machInst, rt, rt2, rt2 + 1, rn, true, 0); |
| case 0x0b: |
| return new %(strexd)s(machInst, rt, rt2, rt2 + 1, rn, true, 0); |
| case 0x0e: |
| return new %(ldaexd)s(machInst, rt, rt + 1, rn, true, 0); |
| case 0x0f: |
| return new %(ldrexd)s(machInst, rt, rt + 1, rn, true, 0); |
| case 0x10: |
| return new %(stlb)s(machInst, rt, rn, true, 0); |
| case 0x12: |
| return new %(stlexb)s(machInst, rt, rt2, rn, true, 0); |
| case 0x13: |
| return new %(strexb)s(machInst, rt, rt2, rn, true, 0); |
| case 0x14: |
| return new %(ldab)s(machInst, rt, rn, true, 0); |
| case 0x16: |
| return new %(ldaexb)s(machInst, rt, rn, true, 0); |
| case 0x17: |
| return new %(ldrexb)s(machInst, rt, rn, true, 0); |
| case 0x18: |
| return new %(stlh)s(machInst, rt, rn, true, 0); |
| case 0x1a: |
| return new %(stlexh)s(machInst, rt, rt2, rn, true, 0); |
| case 0x1b: |
| return new %(strexh)s(machInst, rt, rt2, rn, true, 0); |
| case 0x1c: |
| return new %(ldah)s(machInst, rt, rn, true, 0); |
| case 0x1e: |
| return new %(ldaexh)s(machInst, rt, rn, true, 0); |
| case 0x1f: |
| return new %(ldrexh)s(machInst, rt, rn, true, 0); |
| default: |
| return new Unknown(machInst); |
| } |
| } |
| ''' % { |
| "ldrex" : "LDREX_" + loadImmClassName(False, True, False, size=4), |
| "ldrexb" : "LDREXB_" + loadImmClassName(False, True, False, size=1), |
| "ldrexh" : "LDREXH_" + loadImmClassName(False, True, False, size=2), |
| "ldrexd" : "LDREXD_" + loadDoubleImmClassName(False, True, False), |
| "strex" : "STREX_" + storeImmClassName(False, True, False, size=4), |
| "strexb" : "STREXB_" + storeImmClassName(False, True, False, size=1), |
| "strexh" : "STREXH_" + storeImmClassName(False, True, False, size=2), |
| "strexd" : "STREXD_" + storeDoubleImmClassName(False, True, False), |
| |
| "lda" : "LDA_" + loadImmClassName(False, True, False, size=4), |
| "ldab" : "LDAB_" + loadImmClassName(False, True, False, size=1), |
| "ldah" : "LDAH_" + loadImmClassName(False, True, False, size=2), |
| "ldaex" : "LDAEX_" + loadImmClassName(False, True, False, size=4), |
| "ldaexb" : "LDAEXB_" + loadImmClassName(False, True, False, size=1), |
| "ldaexh" : "LDAEXH_" + loadImmClassName(False, True, False, size=2), |
| "ldaexd" : "LDAEXD_" + loadDoubleImmClassName(False, True, False), |
| |
| "stl" : "STL_" + storeImmClassName(False, True, False, size=4), |
| "stlb" : "STLB_" + storeImmClassName(False, True, False, size=1), |
| "stlh" : "STLH_" + storeImmClassName(False, True, False, size=2), |
| "stlex" : "STLEX_" + storeImmClassName(False, True, False, size=4), |
| "stlexb" : "STLEXB_" + storeImmClassName(False, True, False, size=1), |
| "stlexh" : "STLEXH_" + storeImmClassName(False, True, False, size=2), |
| "stlexd" : "STLEXD_" + storeDoubleImmClassName(False, True, False) |
| } |
| }}; |
| |
| def format Thumb32SrsRfe() {{ |
| decode_block = ''' |
| { |
| const bool wb = (bits(machInst, 21) == 1); |
| const bool add = (bits(machInst, 24, 23) == 0x3); |
| if (bits(machInst, 20) == 1) { |
| // post == add |
| const IntRegIndex rn = |
| (IntRegIndex)(uint32_t)bits(machInst, 19, 16); |
| if (!add && !wb) { |
| return new %(rfe)s(machInst, rn, RfeOp::DecrementBefore, wb); |
| } else if (add && !wb) { |
| return new %(rfe_u)s(machInst, rn, RfeOp::IncrementAfter, wb); |
| } else if (!add && wb) { |
| return new %(rfe_w)s(machInst, rn, RfeOp::DecrementBefore, wb); |
| } else { |
| return new %(rfe_uw)s(machInst, rn, RfeOp::IncrementAfter, wb); |
| } |
| } else { |
| const uint32_t mode = bits(machInst, 4, 0); |
| // We check at decode stage if the mode exists even |
| // if the checking is re-done by Srs::execute. |
| // This is done because we will otherwise panic if |
| // trying to read the banked stack pointer of an |
| // unrecognized mode. |
| if (unknownMode32((OperatingMode)mode)) |
| return new Unknown(machInst); |
| if (!add && !wb) { |
| return new %(srs)s(machInst, mode, |
| SrsOp::DecrementBefore, wb); |
| } else if (add && !wb) { |
| return new %(srs_u)s(machInst, mode, |
| SrsOp::IncrementAfter, wb); |
| } else if (!add && wb) { |
| return new %(srs_w)s(machInst, mode, |
| SrsOp::DecrementBefore, wb); |
| } else { |
| return new %(srs_uw)s(machInst, mode, |
| SrsOp::IncrementAfter, wb); |
| } |
| } |
| } |
| ''' % { |
| "rfe" : "RFE_" + loadImmClassName(False, False, False, 8), |
| "rfe_u" : "RFE_" + loadImmClassName(True, True, False, 8), |
| "rfe_w" : "RFE_" + loadImmClassName(False, False, True, 8), |
| "rfe_uw" : "RFE_" + loadImmClassName(True, True, True, 8), |
| "srs" : "SRS_" + storeImmClassName(False, False, False, 8), |
| "srs_u" : "SRS_" + storeImmClassName(True, True, False, 8), |
| "srs_w" : "SRS_" + storeImmClassName(False, False, True, 8), |
| "srs_uw" : "SRS_" + storeImmClassName(True, True, True, 8) |
| } |
| }}; |
| |
| def format Thumb32LdrStrDExTbh() {{ |
| decode_block = ''' |
| { |
| const uint32_t op1 = bits(machInst, 24, 23); |
| const uint32_t op2 = bits(machInst, 21, 20); |
| const uint32_t op3 = bits(machInst, 7, 4); |
| const IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 19, 16); |
| const IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 15, 12); |
| const IntRegIndex rt2 = (IntRegIndex)(uint32_t)bits(machInst, 11, 8); |
| const IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 3, 0); |
| const uint32_t imm8 = bits(machInst, 7, 0); |
| if (bits(op1, 1) == 0 && bits(op2, 1) == 0) { |
| if (op1 == 0) { |
| const uint32_t imm = bits(machInst, 7, 0) << 2; |
| if (op2 == 0) { |
| return new %(strex)s(machInst, rt2, rt, rn, true, imm); |
| } else { |
| return new %(ldrex)s(machInst, rt, rn, true, imm); |
| } |
| } else { |
| if (op2 == 0) { |
| switch (op3) { |
| case 0x4: |
| return new %(strexb)s(machInst, rd, rt, rn, true, 0); |
| case 0x5: |
| return new %(strexh)s(machInst, rd, rt, rn, true, 0); |
| case 0x7: |
| return new %(strexd)s(machInst, rd, rt, |
| rt2, rn, true, 0); |
| case 0x8: |
| return new %(stlb)s(machInst, rt, rn, true, 0); |
| case 0x9: |
| return new %(stlh)s(machInst, rt, rn, true, 0); |
| case 0xa: |
| return new %(stl)s(machInst, rt, rn, true, 0); |
| case 0xc: |
| return new %(stlexb)s(machInst, rd, rt, rn, true, 0); |
| case 0xd: |
| return new %(stlexh)s(machInst, rd, rt, rn, true, 0); |
| case 0xe: |
| return new %(stlex)s(machInst, rd, rt, rn, true, 0); |
| case 0xf: |
| return new %(stlexd)s(machInst, rd, rt, |
| rt2, rn, true, 0); |
| default: |
| return new Unknown(machInst); |
| } |
| } else { |
| switch (op3) { |
| case 0x0: |
| return new Tbb(machInst, rn, rd); |
| case 0x1: |
| return new Tbh(machInst, rn, rd); |
| case 0x4: |
| return new %(ldrexb)s(machInst, rt, rn, true, 0); |
| case 0x5: |
| return new %(ldrexh)s(machInst, rt, rn, true, 0); |
| case 0x7: |
| return new %(ldrexd)s(machInst, rt, rt2, rn, true, 0); |
| case 0x8: |
| return new %(ldab)s(machInst, rt, rn, true, 0); |
| case 0x9: |
| return new %(ldah)s(machInst, rt, rn, true, 0); |
| case 0xa: |
| return new %(lda)s(machInst, rt, rn, true, 0); |
| case 0xc: |
| return new %(ldaexb)s(machInst, rt, rn, true, 0); |
| case 0xd: |
| return new %(ldaexh)s(machInst, rt, rn, true, 0); |
| case 0xe: |
| return new %(ldaex)s(machInst, rt, rn, true, 0); |
| case 0xf: |
| return new %(ldaexd)s(machInst, rt, rt2, rn, true, 0); |
| default: |
| return new Unknown(machInst); |
| } |
| } |
| } |
| } else { |
| const uint32_t puw = (bits(machInst, 24, 23) << 1) | |
| bits(machInst, 21); |
| const uint32_t dimm = imm8 << 2; |
| if (bits(op2, 0) == 0) { |
| switch (puw) { |
| case 0x1: |
| return new %(strd_w)s(machInst, rt, rt2, rn, false, dimm); |
| case 0x3: |
| return new %(strd_uw)s(machInst, rt, rt2, rn, true, dimm); |
| case 0x4: |
| return new %(strd_p)s(machInst, rt, rt2, rn, false, dimm); |
| case 0x5: |
| return new %(strd_pw)s(machInst, rt, rt2, rn, false, dimm); |
| case 0x6: |
| return new %(strd_pu)s(machInst, rt, rt2, rn, true, dimm); |
| case 0x7: |
| return new %(strd_puw)s(machInst, rt, rt2, rn, true, dimm); |
| default: |
| return new Unknown(machInst); |
| } |
| } else { |
| switch (puw) { |
| case 0x1: |
| return new %(ldrd_w)s(machInst, rt, rt2, rn, false, dimm); |
| case 0x3: |
| return new %(ldrd_uw)s(machInst, rt, rt2, rn, true, dimm); |
| case 0x4: |
| return new %(ldrd_p)s(machInst, rt, rt2, rn, false, dimm); |
| case 0x5: |
| return new %(ldrd_pw)s(machInst, rt, rt2, rn, false, dimm); |
| case 0x6: |
| return new %(ldrd_pu)s(machInst, rt, rt2, rn, true, dimm); |
| case 0x7: |
| return new %(ldrd_puw)s(machInst, rt, rt2, rn, true, dimm); |
| default: |
| return new Unknown(machInst); |
| } |
| } |
| } |
| } |
| ''' % { |
| "ldrex" : "LDREX_" + loadImmClassName(False, True, False, size=4), |
| "ldrexb" : "LDREXB_" + loadImmClassName(False, True, False, size=1), |
| "ldrexh" : "LDREXH_" + loadImmClassName(False, True, False, size=2), |
| "ldrexd" : "LDREXD_" + loadDoubleImmClassName(False, True, False), |
| "strex" : "STREX_" + storeImmClassName(False, True, False, size=4), |
| "strexb" : "STREXB_" + storeImmClassName(False, True, False, size=1), |
| "strexh" : "STREXH_" + storeImmClassName(False, True, False, size=2), |
| "strexd" : "STREXD_" + storeDoubleImmClassName(False, True, False), |
| "ldrd_w" : loadDoubleImmClassName(True, False, True), |
| "ldrd_uw" : loadDoubleImmClassName(True, True, True), |
| "ldrd_p" : loadDoubleImmClassName(False, False, False), |
| "ldrd_pw" : loadDoubleImmClassName(False, False, True), |
| "ldrd_pu" : loadDoubleImmClassName(False, True, False), |
| "ldrd_puw" : loadDoubleImmClassName(False, True, True), |
| "strd_w" : storeDoubleImmClassName(True, False, True), |
| "strd_uw" : storeDoubleImmClassName(True, True, True), |
| "strd_p" : storeDoubleImmClassName(False, False, False), |
| "strd_pw" : storeDoubleImmClassName(False, False, True), |
| "strd_pu" : storeDoubleImmClassName(False, True, False), |
| "strd_puw" : storeDoubleImmClassName(False, True, True), |
| |
| "stl" : "STL_" + storeImmClassName(False, True, False, size=4), |
| "stlh" : "STLH_" + storeImmClassName(False, True, False, size=2), |
| "stlb" : "STLB_" + storeImmClassName(False, True, False, size=1), |
| "stlex" : "STLEX_" + storeImmClassName(False, True, False, size=4), |
| "stlexh" : "STLEXH_" + storeImmClassName(False, True, False, size=2), |
| "stlexb" : "STLEXB_" + storeImmClassName(False, True, False, size=1), |
| "stlexd" : "STLEXD_" + storeDoubleImmClassName(False, True, False), |
| "lda" : "LDA_" + loadImmClassName(False, True, False, size=4), |
| "ldah" : "LDAH_" + loadImmClassName(False, True, False, size=2), |
| "ldab" : "LDAB_" + loadImmClassName(False, True, False, size=1), |
| "ldaex" : "LDAEX_" + loadImmClassName(False, True, False, size=4), |
| "ldaexh" : "LDAEXH_" + loadImmClassName(False, True, False, size=2), |
| "ldaexb" : "LDAEXB_" + loadImmClassName(False, True, False, size=1), |
| "ldaexd" : "LDAEXD_" + loadDoubleImmClassName(False, True, False) |
| } |
| }}; |
| |
| def format Thumb32LoadWord() {{ |
| decode = ''' |
| { |
| uint32_t op1 = bits(machInst, 24, 23); |
| if (bits(op1, 1) == 0) { |
| uint32_t op2 = bits(machInst, 11, 6); |
| if (HTRN == 0xF) { |
| if (UP) { |
| return new %(literal_u)s(machInst, RT, INTREG_PC, |
| true, IMMED_11_0); |
| } else { |
| return new %(literal)s(machInst, RT, INTREG_PC, |
| false, IMMED_11_0); |
| } |
| } else if (op1 == 0x1) { |
| return new %(imm_pu)s(machInst, RT, RN, true, IMMED_11_0); |
| } else if (op2 == 0) { |
| return new %(register)s(machInst, RT, RN, UP, |
| bits(machInst, 5, 4), LSL, RM); |
| } else if ((op2 & 0x3c) == 0x38) { |
| return new %(ldrt)s(machInst, RT, RN, true, IMMED_7_0); |
| } else if ((op2 & 0x3c) == 0x30 || //P |
| (op2 & 0x24) == 0x24) { //W |
| uint32_t puw = bits(machInst, 10, 8); |
| uint32_t imm = IMMED_7_0; |
| switch (puw) { |
| case 0: |
| case 2: |
| // If we're here, either P or W must have been set. |
| panic("Neither P or W set, but that " |
| "shouldn't be possible.\\n"); |
| case 1: |
| return new %(imm_w)s(machInst, RT, RN, false, imm); |
| case 3: |
| return new %(imm_uw)s(machInst, RT, RN, true, imm); |
| case 4: |
| return new %(imm_p)s(machInst, RT, RN, false, imm); |
| case 5: |
| return new %(imm_pw)s(machInst, RT, RN, false, imm); |
| case 6: |
| return new %(imm_pu)s(machInst, RT, RN, true, imm); |
| case 7: |
| return new %(imm_puw)s(machInst, RT, RN, true, imm); |
| } |
| } |
| return new Unknown(machInst); |
| } else { |
| return new Unknown(machInst); |
| } |
| } |
| ''' |
| classNames = { |
| "literal_u" : loadImmClassName(False, True, False), |
| "literal" : loadImmClassName(False, False, False), |
| "register" : loadRegClassName(False, True, False), |
| "ldrt" : loadImmClassName(False, True, False, user=True), |
| "imm_w" : loadImmClassName(True, False, True), |
| "imm_uw" : loadImmClassName(True, True, True), |
| "imm_p" : loadImmClassName(False, False, False), |
| "imm_pw" : loadImmClassName(False, False, True), |
| "imm_pu" : loadImmClassName(False, True, False), |
| "imm_puw" : loadImmClassName(False, True, True) |
| } |
| decode_block = decode % classNames |
| }}; |
| |
| def format Thumb32StoreSingle() {{ |
| def buildPuwDecode(size): |
| puwDecode = ''' |
| { |
| uint32_t puw = bits(machInst, 10, 8); |
| uint32_t imm = IMMED_7_0; |
| switch (puw) { |
| case 0: |
| case 2: |
| // If we're here, either P or W must have been set. |
| panic("Neither P or W set, but that " |
| "shouldn't be possible.\\n"); |
| case 1: |
| return new %(imm_w)s(machInst, RT, RN, false, imm); |
| case 3: |
| return new %(imm_uw)s(machInst, RT, RN, true, imm); |
| case 4: |
| return new %(imm_p)s(machInst, RT, RN, false, imm); |
| case 5: |
| return new %(imm_pw)s(machInst, RT, RN, false, imm); |
| case 6: |
| return new %(imm_pu)s(machInst, RT, RN, true, imm); |
| case 7: |
| return new %(imm_puw)s(machInst, RT, RN, true, imm); |
| default: |
| M5_UNREACHABLE; |
| } |
| } |
| ''' |
| return puwDecode % { |
| "imm_w" : storeImmClassName(True, False, True, size=size), |
| "imm_uw" : storeImmClassName(True, True, True, size=size), |
| "imm_p" : storeImmClassName(False, False, False, size=size), |
| "imm_pw" : storeImmClassName(False, False, True, size=size), |
| "imm_pu" : storeImmClassName(False, True, False, size=size), |
| "imm_puw" : storeImmClassName(False, True, True, size=size) |
| } |
| decode = ''' |
| { |
| uint32_t op1 = bits(machInst, 23, 21); |
| uint32_t op2 = bits(machInst, 11, 6); |
| bool op2Puw = ((op2 & 0x24) == 0x24 || |
| (op2 & 0x3c) == 0x30); |
| if (RN == 0xf) { |
| return new Unknown(machInst); |
| } |
| if (op1 == 4) { |
| return new %(strb_imm)s(machInst, RT, RN, true, IMMED_11_0); |
| } else if (op1 == 0 && op2Puw) { |
| %(strb_puw)s; |
| } else if (op1 == 0 && ((op2 & 0x3c) == 0x38)) { |
| return new %(strbt)s(machInst, RT, RN, true, IMMED_7_0); |
| } else if (op1 == 0 && op2 == 0) { |
| return new %(strb_reg)s(machInst, RT, RN, true, |
| bits(machInst, 5, 4), LSL, RM); |
| } else if (op1 == 5) { |
| return new %(strh_imm)s(machInst, RT, RN, true, IMMED_11_0); |
| } else if (op1 == 1 && op2Puw) { |
| %(strh_puw)s; |
| } else if (op1 == 1 && ((op2 & 0x3c) == 0x38)) { |
| return new %(strht)s(machInst, RT, RN, true, IMMED_7_0); |
| } else if (op1 == 1 && op2 == 0) { |
| return new %(strh_reg)s(machInst, RT, RN, true, |
| bits(machInst, 5, 4), LSL, RM); |
| } else if (op1 == 6) { |
| return new %(str_imm)s(machInst, RT, RN, true, IMMED_11_0); |
| } else if (op1 == 2 && op2Puw) { |
| %(str_puw)s; |
| } else if (op1 == 2 && ((op2 & 0x3c) == 0x38)) { |
| return new %(strt)s(machInst, RT, RN, true, IMMED_7_0); |
| } else if (op1 == 2 && op2 == 0) { |
| return new %(str_reg)s(machInst, RT, RN, true, |
| bits(machInst, 5, 4), LSL, RM); |
| } else { |
| return new Unknown(machInst); |
| } |
| } |
| ''' |
| classNames = { |
| "strb_imm" : storeImmClassName(False, True, False, size=1), |
| "strb_puw" : buildPuwDecode(1), |
| "strbt" : storeImmClassName(False, True, False, user=True, size=1), |
| "strb_reg" : storeRegClassName(False, True, False, size=1), |
| "strh_imm" : storeImmClassName(False, True, False, size=2), |
| "strh_puw" : buildPuwDecode(2), |
| "strht" : storeImmClassName(False, True, False, user=True, size=2), |
| "strh_reg" : storeRegClassName(False, True, False, size=2), |
| "str_imm" : storeImmClassName(False, True, False), |
| "str_puw" : buildPuwDecode(4), |
| "strt" : storeImmClassName(False, True, False, user=True), |
| "str_reg" : storeRegClassName(False, True, False) |
| } |
| decode_block = decode % classNames |
| }}; |
| |
| def format LoadByteMemoryHints() {{ |
| decode = ''' |
| { |
| const uint32_t op1 = bits(machInst, 24, 23); |
| const uint32_t op2 = bits(machInst, 11, 6); |
| const IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 19, 16); |
| const IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 15, 12); |
| const IntRegIndex rm = (IntRegIndex)(uint32_t)bits(machInst, 3, 0); |
| const uint32_t imm12 = bits(machInst, 11, 0); |
| const uint32_t imm8 = bits(machInst, 7, 0); |
| bool pldw = bits(machInst, 21); |
| const uint32_t imm2 = bits(machInst, 5, 4); |
| if (rn == 0xf) { |
| if (rt == 0xf) { |
| const bool add = bits(machInst, 23); |
| if (bits(op1, 1) == 1) { |
| if (add) { |
| return new %(pli_iulit)s(machInst, INTREG_ZERO, |
| INTREG_PC, true, imm12); |
| } else { |
| return new %(pli_ilit)s(machInst, INTREG_ZERO, |
| INTREG_PC, false, imm12); |
| } |
| } else { |
| if (add) { |
| return new %(pld_iulit)s(machInst, INTREG_ZERO, |
| INTREG_PC, true, imm12); |
| } else { |
| return new %(pld_ilit)s(machInst, INTREG_ZERO, |
| INTREG_PC, false, imm12); |
| } |
| } |
| } else { |
| if (bits(op1, 1) == 1) { |
| if (bits(machInst, 23)) { |
| return new %(ldrsb_lit_u)s(machInst, rt, INTREG_PC, |
| true, imm12); |
| } else { |
| return new %(ldrsb_lit)s(machInst, rt, INTREG_PC, |
| false, imm12); |
| } |
| } else { |
| if (bits(machInst, 23)) { |
| return new %(ldrb_lit_u)s(machInst, rt, INTREG_PC, |
| true, imm12); |
| } else { |
| return new %(ldrb_lit)s(machInst, rt, INTREG_PC, |
| false, imm12); |
| } |
| } |
| } |
| } else if (rt == 0xf) { |
| switch (op1) { |
| case 0x0: |
| if (op2 == 0x0) { |
| if (pldw) { |
| return new %(pldw_radd)s(machInst, INTREG_ZERO, |
| rn, true, imm2, LSL, rm); |
| } else { |
| return new %(pld_radd)s(machInst, INTREG_ZERO, |
| rn, true, imm2, LSL, rm); |
| } |
| } else if (bits(op2, 5, 2) == 0xc) { |
| if (pldw) { |
| return new %(pldw_isub)s(machInst, INTREG_ZERO, |
| rn, false, imm8); |
| } else { |
| return new %(pld_isub)s(machInst, INTREG_ZERO, |
| rn, false, imm8); |
| } |
| } |
| break; |
| case 0x1: |
| if (pldw) { |
| return new %(pldw_iadd)s(machInst, INTREG_ZERO, |
| rn, true, imm12); |
| } else { |
| return new %(pld_iadd)s(machInst, INTREG_ZERO, |
| rn, true, imm12); |
| } |
| case 0x2: |
| if (op2 == 0x0) { |
| return new %(pli_radd)s(machInst, INTREG_ZERO, rn, |
| true, imm2, LSL, rm); |
| } else if (bits(op2, 5, 2) == 0xc) { |
| return new %(pli_ilit)s(machInst, INTREG_ZERO, |
| INTREG_PC, false, imm8); |
| } |
| break; |
| case 0x3: |
| return new %(pli_iulit)s(machInst, INTREG_ZERO, |
| INTREG_PC, true, imm12); |
| } |
| return new Unknown(machInst); |
| } else { |
| switch (op1) { |
| case 0x0: |
| if (op2 == 0) { |
| return new %(ldrb_radd)s(machInst, rt, rn, true, |
| imm2, LSL, rm); |
| } else if (bits(op2, 5, 2) == 0xe) { |
| return new %(ldrbt)s(machInst, rt, rn, true, imm8); |
| } else if ((op2 & 0x24) == 0x24 || bits(op2, 5, 2) == 0xc) { |
| const uint32_t puw = bits(machInst, 10, 8); |
| switch (puw) { |
| case 0x1: |
| return new %(ldrb_iw)s(machInst, rt, |
| rn, false, imm8); |
| case 0x3: |
| return new %(ldrb_iuw)s(machInst, rt, |
| rn, true, imm8); |
| case 0x4: |
| return new %(ldrb_ip)s(machInst, rt, |
| rn, false, imm8); |
| case 0x5: |
| return new %(ldrb_ipw)s(machInst, rt, |
| rn, false, imm8); |
| case 0x7: |
| return new %(ldrb_ipuw)s(machInst, rt, |
| rn, true, imm8); |
| } |
| } |
| break; |
| case 0x1: |
| return new %(ldrb_iadd)s(machInst, rt, rn, true, imm12); |
| case 0x2: |
| if (op2 == 0) { |
| return new %(ldrsb_radd)s(machInst, rt, rn, true, |
| imm2, LSL, rm); |
| } else if (bits(op2, 5, 2) == 0xe) { |
| return new %(ldrsbt)s(machInst, rt, rn, true, imm8); |
| } else if ((op2 & 0x24) == 0x24 || bits(op2, 5, 2) == 0xc) { |
| const uint32_t puw = bits(machInst, 10, 8); |
| switch (puw) { |
| case 0x1: |
| return new %(ldrsb_iw)s(machInst, rt, |
| rn, false, imm8); |
| case 0x3: |
| return new %(ldrsb_iuw)s(machInst, rt, |
| rn, true, imm8); |
| case 0x4: |
| return new %(ldrsb_ip)s(machInst, rt, |
| rn, false, imm8); |
| case 0x5: |
| return new %(ldrsb_ipw)s(machInst, rt, |
| rn, false, imm8); |
| case 0x7: |
| return new %(ldrsb_ipuw)s(machInst, rt, |
| rn, true, imm8); |
| } |
| } |
| break; |
| case 0x3: |
| return new %(ldrsb_iadd)s(machInst, rt, rn, true, imm12); |
| } |
| return new Unknown(machInst); |
| } |
| } |
| ''' |
| substDict = { |
| "ldrsb_lit_u" : loadImmClassName(False, True, False, 1, True), |
| "ldrsb_lit" : loadImmClassName(False, False, False, 1, True), |
| "ldrb_lit_u" : loadImmClassName(False, True, False, 1), |
| "ldrb_lit" : loadImmClassName(False, False, False, 1), |
| "ldrsb_radd" : loadRegClassName(False, True, False, 1, True), |
| "ldrb_radd" : loadRegClassName(False, True, False, 1), |
| "ldrsb_iw" : loadImmClassName(True, False, True, 1, True), |
| "ldrsb_iuw" : loadImmClassName(True, True, True, 1, True), |
| "ldrsb_ip" : loadImmClassName(False, False, False, 1, True), |
| "ldrsb_ipw" : loadImmClassName(False, False, True, 1, True), |
| "ldrsb_ipuw" : loadImmClassName(False, True, True, 1, True), |
| "ldrsb_iadd" : loadImmClassName(False, True, False, 1, True), |
| "ldrb_iw" : loadImmClassName(True, False, True, 1), |
| "ldrb_iuw" : loadImmClassName(True, True, True, 1), |
| "ldrb_ip" : loadImmClassName(False, False, False, 1), |
| "ldrb_ipw" : loadImmClassName(False, False, True, 1), |
| "ldrb_ipuw" : loadImmClassName(False, True, True, 1), |
| "ldrb_iadd" : loadImmClassName(False, True, False, 1), |
| "ldrbt" : loadImmClassName(False, True, False, 1, user=True), |
| "ldrsbt" : loadImmClassName(False, True, False, 1, True, user=True), |
| "pldw_radd" : "PLDW_" + loadRegClassName(False, True, False, 1), |
| "pld_radd" : "PLD_" + loadRegClassName(False, True, False, 1), |
| "pldw_isub" : "PLDW_" + loadImmClassName(False, False, False, 1), |
| "pld_isub" : "PLD_" + loadImmClassName(False, False, False, 1), |
| "pldw_iadd" : "PLDW_" + loadImmClassName(False, True, False, 1), |
| "pld_iadd" : "PLD_" + loadImmClassName(False, True, False, 1), |
| "pld_iulit" : "PLD_" + loadImmClassName(False, True, False, 1), |
| "pld_ilit" : "PLD_" + loadImmClassName(False, False, False, 1), |
| "pli_iulit" : "PLI_" + loadImmClassName(False, True, False, 1), |
| "pli_ilit" : "PLI_" + loadImmClassName(False, False, False, 1), |
| "pli_radd" : "PLI_" + loadRegClassName(False, True, False, 1), |
| "pli_iulit" : "PLI_" + loadImmClassName(False, True, False, 1), |
| "pli_ilit" : "PLI_" + loadImmClassName(False, False, False, 1) |
| } |
| decode_block = decode % substDict |
| }}; |
| |
| def format LoadHalfwordMemoryHints() {{ |
| decode = ''' |
| { |
| const uint32_t op1 = bits(machInst, 24, 23); |
| const uint32_t op2 = bits(machInst, 11, 6); |
| const IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 19, 16); |
| const IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 15, 12); |
| const IntRegIndex rm = (IntRegIndex)(uint32_t)bits(machInst, 3, 0); |
| const uint32_t imm12 = bits(machInst, 11, 0); |
| const uint32_t imm8 = bits(machInst, 7, 0); |
| bool pldw = bits(machInst, 21); |
| const uint32_t imm2 = bits(machInst, 5, 4); |
| if (rn == 0xf) { |
| if (rt == 0xf) { |
| if (bits(op1, 1) == 1) { |
| // Unallocated memory hint |
| return new NopInst(machInst); |
| } else { |
| return new Unknown(machInst); |
| } |
| } else { |
| if (bits(op1, 1) == 1) { |
| if (bits(machInst, 23)) { |
| return new %(ldrsh_lit_u)s(machInst, rt, INTREG_PC, |
| true, imm12); |
| } else { |
| return new %(ldrsh_lit)s(machInst, rt, INTREG_PC, |
| false, imm12); |
| } |
| } else { |
| if (bits(machInst, 23)) { |
| return new %(ldrh_lit_u)s(machInst, rt, INTREG_PC, |
| true, imm12); |
| } else { |
| return new %(ldrh_lit)s(machInst, rt, INTREG_PC, |
| false, imm12); |
| } |
| } |
| } |
| } else if (rt == 0xf) { |
| switch (op1) { |
| case 0x0: |
| if (op2 == 0x0) { |
| if (pldw) { |
| return new %(pldw_radd)s(machInst, INTREG_ZERO, |
| rn, true, imm2, LSL, rm); |
| } else { |
| return new %(pld_radd)s(machInst, INTREG_ZERO, |
| rn, true, imm2, LSL, rm); |
| } |
| } else if (bits(op2, 5, 2) == 0xc) { |
| if (pldw) { |
| return new %(pldw_isub)s(machInst, INTREG_ZERO, |
| rn, false, imm8); |
| } else { |
| return new %(pld_isub)s(machInst, INTREG_ZERO, |
| rn, false, imm8); |
| } |
| } |
| break; |
| case 0x1: |
| if (pldw) { |
| return new %(pldw_iadd)s(machInst, INTREG_ZERO, |
| rn, true, imm12); |
| } else { |
| return new %(pld_iadd)s(machInst, INTREG_ZERO, |
| rn, true, imm12); |
| } |
| case 0x2: |
| if (op2 == 0x0 || bits(op2, 5, 2) == 0xc) { |
| // Unallocated memory hint |
| return new NopInst(machInst); |
| } |
| break; |
| case 0x3: |
| return new NopInst(machInst); |
| } |
| return new Unknown(machInst); |
| } else { |
| switch (op1) { |
| case 0x0: |
| if (op2 == 0) { |
| return new %(ldrh_radd)s(machInst, rt, rn, true, |
| imm2, LSL, rm); |
| } else if (bits(op2, 5, 2) == 0xe) { |
| return new %(ldrht)s(machInst, rt, rn, true, imm8); |
| } else if ((op2 & 0x24) == 0x24 || bits(op2, 5, 2) == 0xc) { |
| const uint32_t puw = bits(machInst, 10, 8); |
| switch (puw) { |
| case 0x1: |
| return new %(ldrh_iw)s(machInst, rt, |
| rn, false, imm8); |
| case 0x3: |
| return new %(ldrh_iuw)s(machInst, rt, |
| rn, true, imm8); |
| case 0x4: |
| return new %(ldrh_ip)s(machInst, rt, |
| rn, false, imm8); |
| case 0x5: |
| return new %(ldrh_ipw)s(machInst, rt, |
| rn, false, imm8); |
| case 0x7: |
| return new %(ldrh_ipuw)s(machInst, rt, |
| rn, true, imm8); |
| } |
| } |
| break; |
| case 0x1: |
| return new %(ldrh_iadd)s(machInst, rt, rn, true, imm12); |
| case 0x2: |
| if (op2 == 0) { |
| return new %(ldrsh_radd)s(machInst, rt, rn, true, |
| imm2, LSL, rm); |
| } else if (bits(op2, 5, 2) == 0xe) { |
| return new %(ldrsht)s(machInst, rt, rn, true, imm8); |
| } else if ((op2 & 0x24) == 0x24 || bits(op2, 5, 2) == 0xc) { |
| const uint32_t puw = bits(machInst, 10, 8); |
| switch (puw) { |
| case 0x1: |
| return new %(ldrsh_iw)s(machInst, rt, |
| rn, false, imm8); |
| case 0x3: |
| return new %(ldrsh_iuw)s(machInst, rt, |
| rn, true, imm8); |
| case 0x4: |
| return new %(ldrsh_ip)s(machInst, rt, |
| rn, false, imm8); |
| case 0x5: |
| return new %(ldrsh_ipw)s(machInst, rt, |
| rn, false, imm8); |
| case 0x7: |
| return new %(ldrsh_ipuw)s(machInst, rt, |
| rn, true, imm8); |
| } |
| } |
| break; |
| case 0x3: |
| return new %(ldrsh_iadd)s(machInst, rt, rn, true, imm12); |
| } |
| return new Unknown(machInst); |
| } |
| } |
| ''' |
| substDict = { |
| "ldrsh_lit_u" : loadImmClassName(False, True, False, 2, True), |
| "ldrsh_lit" : loadImmClassName(False, False, False, 2, True), |
| "ldrh_lit_u" : loadImmClassName(False, True, False, 2), |
| "ldrh_lit" : loadImmClassName(False, False, False, 2), |
| "ldrsh_radd" : loadRegClassName(False, True, False, 2, True), |
| "ldrh_radd" : loadRegClassName(False, True, False, 2), |
| "ldrsh_iw" : loadImmClassName(True, False, True, 2, True), |
| "ldrsh_iuw" : loadImmClassName(True, True, True, 2, True), |
| "ldrsh_ip" : loadImmClassName(False, False, False, 2, True), |
| "ldrsh_ipw" : loadImmClassName(False, False, True, 2, True), |
| "ldrsh_ipuw" : loadImmClassName(False, True, True, 2, True), |
| "ldrsh_iadd" : loadImmClassName(False, True, False, 2, True), |
| "ldrh_iw" : loadImmClassName(True, False, True, 2), |
| "ldrh_iuw" : loadImmClassName(True, True, True, 2), |
| "ldrh_ip" : loadImmClassName(False, False, False, 2), |
| "ldrh_ipw" : loadImmClassName(False, False, True, 2), |
| "ldrh_ipuw" : loadImmClassName(False, True, True, 2), |
| "ldrh_iadd" : loadImmClassName(False, True, False, 2), |
| "ldrht" : loadImmClassName(False, True, False, 2, user=True), |
| "ldrsht" : loadImmClassName(False, True, False, 2, True, user=True), |
| "pldw_radd" : "PLDW_" + loadRegClassName(False, True, False, 1), |
| "pld_radd" : "PLD_" + loadRegClassName(False, True, False, 1), |
| "pldw_isub" : "PLDW_" + loadImmClassName(False, False, False, 1), |
| "pld_isub" : "PLD_" + loadImmClassName(False, False, False, 1), |
| "pldw_iadd" : "PLDW_" + loadImmClassName(False, True, False, 1), |
| "pld_iadd" : "PLD_" + loadImmClassName(False, True, False, 1) |
| } |
| decode_block = decode % substDict |
| }}; |
| |
| def format Thumb16MemReg() {{ |
| decode = ''' |
| { |
| const uint32_t opb = bits(machInst, 11, 9); |
| const uint32_t rt = bits(machInst, 2, 0); |
| const uint32_t rn = bits(machInst, 5, 3); |
| const uint32_t rm = bits(machInst, 8, 6); |
| switch (opb) { |
| case 0x0: |
| return new %(str)s(machInst, rt, rn, true, 0, LSL, rm); |
| case 0x1: |
| return new %(strh)s(machInst, rt, rn, true, 0, LSL, rm); |
| case 0x2: |
| return new %(strb)s(machInst, rt, rn, true, 0, LSL, rm); |
| case 0x3: |
| return new %(ldrsb)s(machInst, rt, rn, true, 0, LSL, rm); |
| case 0x4: |
| return new %(ldr)s(machInst, rt, rn, true, 0, LSL, rm); |
| case 0x5: |
| return new %(ldrh)s(machInst, rt, rn, true, 0, LSL, rm); |
| case 0x6: |
| return new %(ldrb)s(machInst, rt, rn, true, 0, LSL, rm); |
| case 0x7: |
| return new %(ldrsh)s(machInst, rt, rn, true, 0, LSL, rm); |
| default: |
| M5_UNREACHABLE; |
| } |
| } |
| ''' |
| classNames = { |
| "str" : storeRegClassName(False, True, False), |
| "strh" : storeRegClassName(False, True, False, size=2), |
| "strb" : storeRegClassName(False, True, False, size=1), |
| "ldrsb" : loadRegClassName(False, True, False, sign=True, size=1), |
| "ldr" : loadRegClassName(False, True, False), |
| "ldrh" : loadRegClassName(False, True, False, size=2), |
| "ldrb" : loadRegClassName(False, True, False, size=1), |
| "ldrsh" : loadRegClassName(False, True, False, sign=True, size=2), |
| } |
| decode_block = decode % classNames |
| }}; |
| |
| def format Thumb16MemImm() {{ |
| decode = ''' |
| { |
| const uint32_t opa = bits(machInst, 15, 12); |
| const uint32_t opb = bits(machInst, 11, 9); |
| const uint32_t lrt = bits(machInst, 2, 0); |
| const uint32_t lrn = bits(machInst, 5, 3); |
| const uint32_t hrt = bits(machInst, 10, 8); |
| const uint32_t imm5 = bits(machInst, 10, 6); |
| const uint32_t imm8 = bits(machInst, 7, 0); |
| const bool load = bits(opb, 2); |
| switch (opa) { |
| case 0x6: |
| if (load) { |
| return new %(ldr)s(machInst, lrt, lrn, true, imm5 << 2); |
| } else { |
| return new %(str)s(machInst, lrt, lrn, true, imm5 << 2); |
| } |
| case 0x7: |
| if (load) { |
| return new %(ldrb)s(machInst, lrt, lrn, true, imm5); |
| } else { |
| return new %(strb)s(machInst, lrt, lrn, true, imm5); |
| } |
| case 0x8: |
| if (load) { |
| return new %(ldrh)s(machInst, lrt, lrn, true, imm5 << 1); |
| } else { |
| return new %(strh)s(machInst, lrt, lrn, true, imm5 << 1); |
| } |
| case 0x9: |
| if (load) { |
| return new %(ldr)s(machInst, hrt, INTREG_SP, true, imm8 << 2); |
| } else { |
| return new %(str)s(machInst, hrt, INTREG_SP, true, imm8 << 2); |
| } |
| default: |
| return new Unknown(machInst); |
| } |
| } |
| ''' |
| classNames = { |
| "ldr" : loadImmClassName(False, True, False), |
| "str" : storeImmClassName(False, True, False), |
| "ldrh" : loadImmClassName(False, True, False, size=2), |
| "strh" : storeImmClassName(False, True, False, size=2), |
| "ldrb" : loadImmClassName(False, True, False, size=1), |
| "strb" : storeImmClassName(False, True, False, size=1), |
| } |
| decode_block = decode % classNames |
| }}; |
| |
| def format Thumb16MemLit() {{ |
| decode_block = ''' |
| { |
| const uint32_t rt = bits(machInst, 10, 8); |
| const uint32_t imm8 = bits(machInst, 7, 0); |
| return new %s(machInst, rt, INTREG_PC, true, imm8 << 2); |
| } |
| ''' % loadImmClassName(False, True, False) |
| }}; |
| |
