From: Luke Kenneth Casson Leighton Date: Sun, 23 May 2021 21:06:28 +0000 (+0100) Subject: add svp64 assembler "processor" commandline for replacing svp64 X-Git-Tag: xlen-bcd~570 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ca04665a7b9f54230eb5b8708af9f3e9b446b9f0;p=openpower-isa.git add svp64 assembler "processor" commandline for replacing svp64 with prefix-plus-v3.0b asm --- diff --git a/setup.py b/setup.py index fbe317b0..5de8b0c4 100644 --- a/setup.py +++ b/setup.py @@ -61,7 +61,8 @@ setup( 'pywriter=openpower.decoder.pseudo.pywriter:pywriter', 'pyfnwriter=openpower.decoder.pseudo.pyfnwriter:pyfnwriter', 'sv_analysis=openpower.sv.sv_analysis:process_csvs', - 'pypowersim=openpower.decoder.isa.pypowersim:run_simulation' + 'pypowersim=openpower.decoder.isa.pypowersim:run_simulation', + 'pysvp64asm=openpower.sv.trans.svp64:asm_process' ] } ) diff --git a/src/openpower/sv/trans/svp64.py b/src/openpower/sv/trans/svp64.py index 4a7d44bb..ee3bcb05 100644 --- a/src/openpower/sv/trans/svp64.py +++ b/src/openpower/sv/trans/svp64.py @@ -149,524 +149,575 @@ class SVP64Asm: def __init__(self, lst, bigendian=False): self.lst = lst self.trans = self.translate(lst) + self.isa = ISA() # reads the v3.0B pseudo-code markdown files + self.svp64 = SVP64RM() # reads the svp64 Remap entries for registers assert bigendian == False, "error, bigendian not supported yet" def __iter__(self): yield from self.trans - def translate(self, lst): - isa = ISA() # reads the v3.0B pseudo-code markdown files - svp64 = SVP64RM() # reads the svp64 Remap entries for registers - for insn in lst: - # find first space, to get opcode - ls = insn.split(' ') - opcode = ls[0] - # now find opcode fields - fields = ''.join(ls[1:]).split(',') - fields = list(map(str.strip, fields)) - log ("opcode, fields", ls, opcode, fields) - - # sigh have to do setvl here manually for now... - if opcode in ["setvl", "setvl."]: - insn = 22 << (31-5) # opcode 22, bits 0-5 - fields = list(map(int, fields)) - insn |= fields[0] << (31-10) # RT , bits 6-10 - insn |= fields[1] << (31-15) # RA , bits 11-15 - insn |= fields[2] << (31-23) # SVi , bits 16-23 - insn |= fields[3] << (31-24) # vs , bit 24 - insn |= fields[4] << (31-25) # ms , bit 25 - insn |= 0b00000 << (31-30) # XO , bits 26..30 - if opcode == 'setvl.': - insn |= 1 << (31-31) # Rc=1 , bit 31 - log ("setvl", bin(insn)) - yield ".long 0x%x" % insn - continue - - # identify if is a svp64 mnemonic - if not opcode.startswith('sv.'): - yield insn # unaltered - continue - opcode = opcode[3:] # strip leading "sv" - - # start working on decoding the svp64 op: sv.basev30Bop/vec2/mode - opmodes = opcode.split("/") # split at "/" - v30b_op = opmodes.pop(0) # first is the v3.0B - # check instruction ends with dot - rc_mode = v30b_op.endswith('.') - if rc_mode: - v30b_op = v30b_op[:-1] - - if v30b_op not in isa.instr: - raise Exception("opcode %s of '%s' not supported" % \ - (v30b_op, insn)) - if v30b_op not in svp64.instrs: - raise Exception("opcode %s of '%s' not an svp64 instruction" % \ - (v30b_op, insn)) - v30b_regs = isa.instr[v30b_op].regs[0] # get regs info "RT, RA, RB" - rm = svp64.instrs[v30b_op] # one row of the svp64 RM CSV - log ("v3.0B op", v30b_op, "Rc=1" if rc_mode else '') - log ("v3.0B regs", opcode, v30b_regs) - log ("RM", rm) - - # right. the first thing to do is identify the ordering of - # the registers, by name. the EXTRA2/3 ordering is in - # rm['0']..rm['3'] but those fields contain the names RA, BB - # etc. we have to read the pseudocode to understand which - # reg is which in our instruction. sigh. - - # first turn the svp64 rm into a "by name" dict, recording - # which position in the RM EXTRA it goes into - # also: record if the src or dest was a CR, for sanity-checking - # (elwidth overrides on CRs are banned) - decode = decode_extra(rm) - dest_reg_cr, src_reg_cr, svp64_src, svp64_dest = decode - - log ("EXTRA field index, src", svp64_src) - log ("EXTRA field index, dest", svp64_dest) - - # okaaay now we identify the field value (opcode N,N,N) with - # the pseudo-code info (opcode RT, RA, RB) - assert len(fields) == len(v30b_regs), \ - "length of fields %s must match insn `%s`" % \ - (str(v30b_regs), insn) - opregfields = zip(fields, v30b_regs) # err that was easy - - # now for each of those find its place in the EXTRA encoding - # note there is the possibility (for LD/ST-with-update) of - # RA occurring **TWICE**. to avoid it getting added to the - # v3.0B suffix twice, we spot it as a duplicate, here - extras = OrderedDict() - for idx, (field, regname) in enumerate(opregfields): - imm, regname = decode_imm(regname) - rtype = get_regtype(regname) - log (" idx find", idx, field, regname, imm) - extra = svp64_src.get(regname, None) - if extra is not None: - extra = ('s', extra, False) # not a duplicate - extras[extra] = (idx, field, regname, rtype, imm) - log (" idx src", idx, extra, extras[extra]) - dextra = svp64_dest.get(regname, None) - log ("regname in", regname, dextra) - if dextra is not None: - is_a_duplicate = extra is not None # duplicate spotted - dextra = ('d', dextra, is_a_duplicate) - extras[dextra] = (idx, field, regname, rtype, imm) - log (" idx dst", idx, extra, extras[dextra]) - - # great! got the extra fields in their associated positions: - # also we know the register type. now to create the EXTRA encodings - etype = rm['Etype'] # Extra type: EXTRA3/EXTRA2 - ptype = rm['Ptype'] # Predication type: Twin / Single - extra_bits = 0 - v30b_newfields = [] - for extra_idx, (idx, field, rname, rtype, iname) in extras.items(): - # is it a field we don't alter/examine? if so just put it - # into newfields - if rtype is None: - v30b_newfields.append(field) - - # identify if this is a ld/st immediate(reg) thing - ldst_imm = "(" in field and field[-1] == ')' - if ldst_imm: - immed, field = field[:-1].split("(") - - field, regmode = decode_reg(field) - log (" ", extra_idx, rname, rtype, - regmode, iname, field, end=" ") - - # see Mode field https://libre-soc.org/openpower/sv/svp64/ - # XXX TODO: the following is a bit of a laborious repeated - # mess, which could (and should) easily be parameterised. - # XXX also TODO: the LD/ST modes which are different - # https://libre-soc.org/openpower/sv/ldst/ - - # encode SV-GPR and SV-FPR field into extra, v3.0field - if rtype in ['GPR', 'FPR']: - sv_extra, field = get_extra_gpr(etype, regmode, field) - # now sanity-check. EXTRA3 is ok, EXTRA2 has limits - # (and shrink to a single bit if ok) - if etype == 'EXTRA2': - if regmode == 'scalar': - # range is r0-r63 in increments of 1 - assert (sv_extra >> 1) == 0, \ - "scalar GPR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as scalar - sv_extra = sv_extra & 0b01 - else: - # range is r0-r127 in increments of 4 - assert sv_extra & 0b01 == 0, \ - "%s: vector field %s cannot fit " \ - "into EXTRA2 %s" % \ - (insn, rname, str(extras[extra_idx])) - # all good: encode as vector (bit 2 set) - sv_extra = 0b10 | (sv_extra >> 1) - elif regmode == 'vector': - # EXTRA3 vector bit needs marking - sv_extra |= 0b100 - - # encode SV-CR 3-bit field into extra, v3.0field - elif rtype == 'CR_3bit': - sv_extra, field = get_extra_cr_3bit(etype, regmode, field) - # now sanity-check (and shrink afterwards) - if etype == 'EXTRA2': - if regmode == 'scalar': - # range is CR0-CR15 in increments of 1 - assert (sv_extra >> 1) == 0, \ - "scalar CR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as scalar - sv_extra = sv_extra & 0b01 - else: - # range is CR0-CR127 in increments of 16 - assert sv_extra & 0b111 == 0, \ - "vector CR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as vector (bit 2 set) - sv_extra = 0b10 | (sv_extra >> 3) + def translate_one(self, insn): + isa = self.isa + svp64 = self.svp64 + # find first space, to get opcode + ls = insn.split(' ') + opcode = ls[0] + # now find opcode fields + fields = ''.join(ls[1:]).split(',') + fields = list(map(str.strip, fields)) + log ("opcode, fields", ls, opcode, fields) + + # sigh have to do setvl here manually for now... + if opcode in ["setvl", "setvl."]: + insn = 22 << (31-5) # opcode 22, bits 0-5 + fields = list(map(int, fields)) + insn |= fields[0] << (31-10) # RT , bits 6-10 + insn |= fields[1] << (31-15) # RA , bits 11-15 + insn |= fields[2] << (31-23) # SVi , bits 16-23 + insn |= fields[3] << (31-24) # vs , bit 24 + insn |= fields[4] << (31-25) # ms , bit 25 + insn |= 0b00000 << (31-30) # XO , bits 26..30 + if opcode == 'setvl.': + insn |= 1 << (31-31) # Rc=1 , bit 31 + log ("setvl", bin(insn)) + yield ".long 0x%x" % insn + return + + # identify if is a svp64 mnemonic + if not opcode.startswith('sv.'): + yield insn # unaltered + return + opcode = opcode[3:] # strip leading "sv" + + # start working on decoding the svp64 op: sv.basev30Bop/vec2/mode + opmodes = opcode.split("/") # split at "/" + v30b_op = opmodes.pop(0) # first is the v3.0B + # check instruction ends with dot + rc_mode = v30b_op.endswith('.') + if rc_mode: + v30b_op = v30b_op[:-1] + + if v30b_op not in isa.instr: + raise Exception("opcode %s of '%s' not supported" % \ + (v30b_op, insn)) + if v30b_op not in svp64.instrs: + raise Exception("opcode %s of '%s' not an svp64 instruction" % \ + (v30b_op, insn)) + v30b_regs = isa.instr[v30b_op].regs[0] # get regs info "RT, RA, RB" + rm = svp64.instrs[v30b_op] # one row of the svp64 RM CSV + log ("v3.0B op", v30b_op, "Rc=1" if rc_mode else '') + log ("v3.0B regs", opcode, v30b_regs) + log ("RM", rm) + + # right. the first thing to do is identify the ordering of + # the registers, by name. the EXTRA2/3 ordering is in + # rm['0']..rm['3'] but those fields contain the names RA, BB + # etc. we have to read the pseudocode to understand which + # reg is which in our instruction. sigh. + + # first turn the svp64 rm into a "by name" dict, recording + # which position in the RM EXTRA it goes into + # also: record if the src or dest was a CR, for sanity-checking + # (elwidth overrides on CRs are banned) + decode = decode_extra(rm) + dest_reg_cr, src_reg_cr, svp64_src, svp64_dest = decode + + log ("EXTRA field index, src", svp64_src) + log ("EXTRA field index, dest", svp64_dest) + + # okaaay now we identify the field value (opcode N,N,N) with + # the pseudo-code info (opcode RT, RA, RB) + assert len(fields) == len(v30b_regs), \ + "length of fields %s must match insn `%s`" % \ + (str(v30b_regs), insn) + opregfields = zip(fields, v30b_regs) # err that was easy + + # now for each of those find its place in the EXTRA encoding + # note there is the possibility (for LD/ST-with-update) of + # RA occurring **TWICE**. to avoid it getting added to the + # v3.0B suffix twice, we spot it as a duplicate, here + extras = OrderedDict() + for idx, (field, regname) in enumerate(opregfields): + imm, regname = decode_imm(regname) + rtype = get_regtype(regname) + log (" idx find", idx, field, regname, imm) + extra = svp64_src.get(regname, None) + if extra is not None: + extra = ('s', extra, False) # not a duplicate + extras[extra] = (idx, field, regname, rtype, imm) + log (" idx src", idx, extra, extras[extra]) + dextra = svp64_dest.get(regname, None) + log ("regname in", regname, dextra) + if dextra is not None: + is_a_duplicate = extra is not None # duplicate spotted + dextra = ('d', dextra, is_a_duplicate) + extras[dextra] = (idx, field, regname, rtype, imm) + log (" idx dst", idx, extra, extras[dextra]) + + # great! got the extra fields in their associated positions: + # also we know the register type. now to create the EXTRA encodings + etype = rm['Etype'] # Extra type: EXTRA3/EXTRA2 + ptype = rm['Ptype'] # Predication type: Twin / Single + extra_bits = 0 + v30b_newfields = [] + for extra_idx, (idx, field, rname, rtype, iname) in extras.items(): + # is it a field we don't alter/examine? if so just put it + # into newfields + if rtype is None: + v30b_newfields.append(field) + + # identify if this is a ld/st immediate(reg) thing + ldst_imm = "(" in field and field[-1] == ')' + if ldst_imm: + immed, field = field[:-1].split("(") + + field, regmode = decode_reg(field) + log (" ", extra_idx, rname, rtype, + regmode, iname, field, end=" ") + + # see Mode field https://libre-soc.org/openpower/sv/svp64/ + # XXX TODO: the following is a bit of a laborious repeated + # mess, which could (and should) easily be parameterised. + # XXX also TODO: the LD/ST modes which are different + # https://libre-soc.org/openpower/sv/ldst/ + + # encode SV-GPR and SV-FPR field into extra, v3.0field + if rtype in ['GPR', 'FPR']: + sv_extra, field = get_extra_gpr(etype, regmode, field) + # now sanity-check. EXTRA3 is ok, EXTRA2 has limits + # (and shrink to a single bit if ok) + if etype == 'EXTRA2': + if regmode == 'scalar': + # range is r0-r63 in increments of 1 + assert (sv_extra >> 1) == 0, \ + "scalar GPR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as scalar + sv_extra = sv_extra & 0b01 else: - if regmode == 'scalar': - # range is CR0-CR31 in increments of 1 - assert (sv_extra >> 2) == 0, \ - "scalar CR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as scalar - sv_extra = sv_extra & 0b11 - else: - # range is CR0-CR127 in increments of 8 - assert sv_extra & 0b11 == 0, \ - "vector CR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as vector (bit 3 set) - sv_extra = 0b100 | (sv_extra >> 2) - - # encode SV-CR 5-bit field into extra, v3.0field - # *sigh* this is the same as 3-bit except the 2 LSBs are - # passed through - elif rtype == 'CR_5bit': - cr_subfield = field & 0b11 - field = field >> 2 # strip bottom 2 bits - sv_extra, field = get_extra_cr_3bit(etype, regmode, field) - # now sanity-check (and shrink afterwards) - if etype == 'EXTRA2': - if regmode == 'scalar': - # range is CR0-CR15 in increments of 1 - assert (sv_extra >> 1) == 0, \ - "scalar CR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as scalar - sv_extra = sv_extra & 0b01 - else: - # range is CR0-CR127 in increments of 16 - assert sv_extra & 0b111 == 0, \ - "vector CR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as vector (bit 2 set) - sv_extra = 0b10 | (sv_extra >> 3) + # range is r0-r127 in increments of 4 + assert sv_extra & 0b01 == 0, \ + "%s: vector field %s cannot fit " \ + "into EXTRA2 %s" % \ + (insn, rname, str(extras[extra_idx])) + # all good: encode as vector (bit 2 set) + sv_extra = 0b10 | (sv_extra >> 1) + elif regmode == 'vector': + # EXTRA3 vector bit needs marking + sv_extra |= 0b100 + + # encode SV-CR 3-bit field into extra, v3.0field + elif rtype == 'CR_3bit': + sv_extra, field = get_extra_cr_3bit(etype, regmode, field) + # now sanity-check (and shrink afterwards) + if etype == 'EXTRA2': + if regmode == 'scalar': + # range is CR0-CR15 in increments of 1 + assert (sv_extra >> 1) == 0, \ + "scalar CR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as scalar + sv_extra = sv_extra & 0b01 else: - if regmode == 'scalar': - # range is CR0-CR31 in increments of 1 - assert (sv_extra >> 2) == 0, \ - "scalar CR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as scalar - sv_extra = sv_extra & 0b11 - else: - # range is CR0-CR127 in increments of 8 - assert sv_extra & 0b11 == 0, \ - "vector CR %s cannot fit into EXTRA2 %s" % \ - (rname, str(extras[extra_idx])) - # all good: encode as vector (bit 3 set) - sv_extra = 0b100 | (sv_extra >> 2) - - # reconstruct the actual 5-bit CR field - field = (field << 2) | cr_subfield - - # capture the extra field info - log ("=>", "%5s" % bin(sv_extra), field) - extras[extra_idx] = sv_extra - - # append altered field value to v3.0b, differs for LDST - # note that duplicates are skipped e.g. EXTRA2 contains - # *BOTH* s:RA *AND* d:RA which happens on LD/ST-with-update - srcdest, idx, duplicate = extra_idx - if duplicate: # skip adding to v3.0b fields, already added - continue - if ldst_imm: - v30b_newfields.append(("%s(%s)" % (immed, str(field)))) + # range is CR0-CR127 in increments of 16 + assert sv_extra & 0b111 == 0, \ + "vector CR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as vector (bit 2 set) + sv_extra = 0b10 | (sv_extra >> 3) else: - v30b_newfields.append(str(field)) - - log ("new v3.0B fields", v30b_op, v30b_newfields) - log ("extras", extras) - - # rright. now we have all the info. start creating SVP64 RM - svp64_rm = SVP64RMFields() - - # begin with EXTRA fields - for idx, sv_extra in extras.items(): - if idx is None: continue - log (idx) - srcdest, idx, duplicate = idx + if regmode == 'scalar': + # range is CR0-CR31 in increments of 1 + assert (sv_extra >> 2) == 0, \ + "scalar CR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as scalar + sv_extra = sv_extra & 0b11 + else: + # range is CR0-CR127 in increments of 8 + assert sv_extra & 0b11 == 0, \ + "vector CR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as vector (bit 3 set) + sv_extra = 0b100 | (sv_extra >> 2) + + # encode SV-CR 5-bit field into extra, v3.0field + # *sigh* this is the same as 3-bit except the 2 LSBs are + # passed through + elif rtype == 'CR_5bit': + cr_subfield = field & 0b11 + field = field >> 2 # strip bottom 2 bits + sv_extra, field = get_extra_cr_3bit(etype, regmode, field) + # now sanity-check (and shrink afterwards) if etype == 'EXTRA2': - svp64_rm.extra2[idx].eq( - SelectableInt(sv_extra, SVP64RM_EXTRA2_SPEC_SIZE)) - else: - svp64_rm.extra3[idx].eq( - SelectableInt(sv_extra, SVP64RM_EXTRA3_SPEC_SIZE)) - - # parts of svp64_rm - mmode = 0 # bit 0 - pmask = 0 # bits 1-3 - destwid = 0 # bits 4-5 - srcwid = 0 # bits 6-7 - subvl = 0 # bits 8-9 - smask = 0 # bits 16-18 but only for twin-predication - mode = 0 # bits 19-23 - - mask_m_specified = False - has_pmask = False - has_smask = False - - saturation = None - src_zero = 0 - dst_zero = 0 - sv_mode = None - - mapreduce = False - mapreduce_crm = False - mapreduce_svm = False - - predresult = False - failfirst = False - - # ok let's start identifying opcode augmentation fields - for encmode in opmodes: - # predicate mask (src and dest) - if encmode.startswith("m="): - pme = encmode - pmmode, pmask = decode_predicate(encmode[2:]) - smmode, smask = pmmode, pmask - mmode = pmmode - mask_m_specified = True - # predicate mask (dest) - elif encmode.startswith("dm="): - pme = encmode - pmmode, pmask = decode_predicate(encmode[3:]) - mmode = pmmode - has_pmask = True - # predicate mask (src, twin-pred) - elif encmode.startswith("sm="): - sme = encmode - smmode, smask = decode_predicate(encmode[3:]) - mmode = smmode - has_smask = True - # vec2/3/4 - elif encmode.startswith("vec"): - subvl = decode_subvl(encmode[3:]) - # elwidth - elif encmode.startswith("ew="): - destwid = decode_elwidth(encmode[3:]) - elif encmode.startswith("sw="): - srcwid = decode_elwidth(encmode[3:]) - # saturation - elif encmode == 'sats': - assert sv_mode is None - saturation = 1 - sv_mode = 0b10 - elif encmode == 'satu': - assert sv_mode is None - sv_mode = 0b10 - saturation = 0 - # predicate zeroing - elif encmode == 'sz': - src_zero = 1 - elif encmode == 'dz': - dst_zero = 1 - # failfirst - elif encmode.startswith("ff="): - assert sv_mode is None - sv_mode = 0b01 - failfirst = decode_ffirst(encmode[3:]) - # predicate-result, interestingly same as fail-first - elif encmode.startswith("pr="): - assert sv_mode is None - sv_mode = 0b11 - predresult = decode_ffirst(encmode[3:]) - # map-reduce mode - elif encmode == 'mr': - assert sv_mode is None - sv_mode = 0b00 - mapreduce = True - elif encmode == 'crm': # CR on map-reduce - assert sv_mode is None - sv_mode = 0b00 - mapreduce_crm = True - elif encmode == 'svm': # sub-vector mode - mapreduce_svm = True + if regmode == 'scalar': + # range is CR0-CR15 in increments of 1 + assert (sv_extra >> 1) == 0, \ + "scalar CR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as scalar + sv_extra = sv_extra & 0b01 + else: + # range is CR0-CR127 in increments of 16 + assert sv_extra & 0b111 == 0, \ + "vector CR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as vector (bit 2 set) + sv_extra = 0b10 | (sv_extra >> 3) else: - raise AssertionError("unknown encmode %s" % encmode) - - if ptype == '2P': - # since m=xx takes precedence (overrides) sm=xx and dm=xx, - # treat them as mutually exclusive - if mask_m_specified: - assert not has_smask,\ - "cannot have both source-mask and predicate mask" - assert not has_pmask,\ - "cannot have both dest-mask and predicate mask" - # since the default is INT predication (ALWAYS), if you - # specify one CR mask, you must specify both, to avoid - # mixing INT and CR reg types - if has_pmask and pmmode == 1: - assert has_smask, \ - "need explicit source-mask in CR twin predication" - if has_smask and smmode == 1: - assert has_pmask, \ - "need explicit dest-mask in CR twin predication" - # sanity-check that 2Pred mask is same mode - if has_pmask and has_smask: - assert smmode == pmmode, \ - "predicate masks %s and %s must be same reg type" % \ - (pme, sme) - - # sanity-check that twin-predication mask only specified in 2P mode - if ptype == '1P': - assert not has_smask, \ - "source-mask can only be specified on Twin-predicate ops" - assert not has_pmask, \ - "dest-mask can only be specified on Twin-predicate ops" - - # construct the mode field, doing sanity-checking along the way - - if mapreduce_svm: - assert sv_mode == 0b00, "sub-vector mode in mapreduce only" - assert subvl != 0, "sub-vector mode not possible on SUBVL=1" - - if src_zero: - assert has_smask or mask_m_specified, \ - "src zeroing requires a source predicate" - if dst_zero: - assert has_pmask or mask_m_specified, \ - "dest zeroing requires a dest predicate" - - # "normal" mode - if sv_mode is None: - mode |= src_zero << SVP64MODE.SZ # predicate zeroing - mode |= dst_zero << SVP64MODE.DZ # predicate zeroing + if regmode == 'scalar': + # range is CR0-CR31 in increments of 1 + assert (sv_extra >> 2) == 0, \ + "scalar CR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as scalar + sv_extra = sv_extra & 0b11 + else: + # range is CR0-CR127 in increments of 8 + assert sv_extra & 0b11 == 0, \ + "vector CR %s cannot fit into EXTRA2 %s" % \ + (rname, str(extras[extra_idx])) + # all good: encode as vector (bit 3 set) + sv_extra = 0b100 | (sv_extra >> 2) + + # reconstruct the actual 5-bit CR field + field = (field << 2) | cr_subfield + + # capture the extra field info + log ("=>", "%5s" % bin(sv_extra), field) + extras[extra_idx] = sv_extra + + # append altered field value to v3.0b, differs for LDST + # note that duplicates are skipped e.g. EXTRA2 contains + # *BOTH* s:RA *AND* d:RA which happens on LD/ST-with-update + srcdest, idx, duplicate = extra_idx + if duplicate: # skip adding to v3.0b fields, already added + continue + if ldst_imm: + v30b_newfields.append(("%s(%s)" % (immed, str(field)))) + else: + v30b_newfields.append(str(field)) + + log ("new v3.0B fields", v30b_op, v30b_newfields) + log ("extras", extras) + + # rright. now we have all the info. start creating SVP64 RM + svp64_rm = SVP64RMFields() + + # begin with EXTRA fields + for idx, sv_extra in extras.items(): + if idx is None: continue + log (idx) + srcdest, idx, duplicate = idx + if etype == 'EXTRA2': + svp64_rm.extra2[idx].eq( + SelectableInt(sv_extra, SVP64RM_EXTRA2_SPEC_SIZE)) + else: + svp64_rm.extra3[idx].eq( + SelectableInt(sv_extra, SVP64RM_EXTRA3_SPEC_SIZE)) + + # parts of svp64_rm + mmode = 0 # bit 0 + pmask = 0 # bits 1-3 + destwid = 0 # bits 4-5 + srcwid = 0 # bits 6-7 + subvl = 0 # bits 8-9 + smask = 0 # bits 16-18 but only for twin-predication + mode = 0 # bits 19-23 + + mask_m_specified = False + has_pmask = False + has_smask = False + + saturation = None + src_zero = 0 + dst_zero = 0 + sv_mode = None + + mapreduce = False + mapreduce_crm = False + mapreduce_svm = False + + predresult = False + failfirst = False + + # ok let's start identifying opcode augmentation fields + for encmode in opmodes: + # predicate mask (src and dest) + if encmode.startswith("m="): + pme = encmode + pmmode, pmask = decode_predicate(encmode[2:]) + smmode, smask = pmmode, pmask + mmode = pmmode + mask_m_specified = True + # predicate mask (dest) + elif encmode.startswith("dm="): + pme = encmode + pmmode, pmask = decode_predicate(encmode[3:]) + mmode = pmmode + has_pmask = True + # predicate mask (src, twin-pred) + elif encmode.startswith("sm="): + sme = encmode + smmode, smask = decode_predicate(encmode[3:]) + mmode = smmode + has_smask = True + # vec2/3/4 + elif encmode.startswith("vec"): + subvl = decode_subvl(encmode[3:]) + # elwidth + elif encmode.startswith("ew="): + destwid = decode_elwidth(encmode[3:]) + elif encmode.startswith("sw="): + srcwid = decode_elwidth(encmode[3:]) + # saturation + elif encmode == 'sats': + assert sv_mode is None + saturation = 1 + sv_mode = 0b10 + elif encmode == 'satu': + assert sv_mode is None + sv_mode = 0b10 + saturation = 0 + # predicate zeroing + elif encmode == 'sz': + src_zero = 1 + elif encmode == 'dz': + dst_zero = 1 + # failfirst + elif encmode.startswith("ff="): + assert sv_mode is None + sv_mode = 0b01 + failfirst = decode_ffirst(encmode[3:]) + # predicate-result, interestingly same as fail-first + elif encmode.startswith("pr="): + assert sv_mode is None + sv_mode = 0b11 + predresult = decode_ffirst(encmode[3:]) + # map-reduce mode + elif encmode == 'mr': + assert sv_mode is None sv_mode = 0b00 + mapreduce = True + elif encmode == 'crm': # CR on map-reduce + assert sv_mode is None + sv_mode = 0b00 + mapreduce_crm = True + elif encmode == 'svm': # sub-vector mode + mapreduce_svm = True + else: + raise AssertionError("unknown encmode %s" % encmode) + + if ptype == '2P': + # since m=xx takes precedence (overrides) sm=xx and dm=xx, + # treat them as mutually exclusive + if mask_m_specified: + assert not has_smask,\ + "cannot have both source-mask and predicate mask" + assert not has_pmask,\ + "cannot have both dest-mask and predicate mask" + # since the default is INT predication (ALWAYS), if you + # specify one CR mask, you must specify both, to avoid + # mixing INT and CR reg types + if has_pmask and pmmode == 1: + assert has_smask, \ + "need explicit source-mask in CR twin predication" + if has_smask and smmode == 1: + assert has_pmask, \ + "need explicit dest-mask in CR twin predication" + # sanity-check that 2Pred mask is same mode + if has_pmask and has_smask: + assert smmode == pmmode, \ + "predicate masks %s and %s must be same reg type" % \ + (pme, sme) + + # sanity-check that twin-predication mask only specified in 2P mode + if ptype == '1P': + assert not has_smask, \ + "source-mask can only be specified on Twin-predicate ops" + assert not has_pmask, \ + "dest-mask can only be specified on Twin-predicate ops" + + # construct the mode field, doing sanity-checking along the way + + if mapreduce_svm: + assert sv_mode == 0b00, "sub-vector mode in mapreduce only" + assert subvl != 0, "sub-vector mode not possible on SUBVL=1" + + if src_zero: + assert has_smask or mask_m_specified, \ + "src zeroing requires a source predicate" + if dst_zero: + assert has_pmask or mask_m_specified, \ + "dest zeroing requires a dest predicate" + + # "normal" mode + if sv_mode is None: + mode |= src_zero << SVP64MODE.SZ # predicate zeroing + mode |= dst_zero << SVP64MODE.DZ # predicate zeroing + sv_mode = 0b00 + + # "mapreduce" modes + elif sv_mode == 0b00: + mode |= (0b1<