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<<SVP64MODE.REDUCE) # sets mapreduce
+ assert dst_zero == 0, "dest-zero not allowed in mapreduce mode"
+ if mapreduce_crm:
+ mode |= (0b1<<SVP64MODE.CRM) # sets CRM mode
+ assert rc_mode, "CRM only allowed when Rc=1"
+ # bit of weird encoding to jam zero-pred or SVM mode in.
+ # SVM mode can be enabled only when SUBVL=2/3/4 (vec2/3/4)
+ if subvl == 0:
+ mode |= dst_zero << SVP64MODE.DZ # predicate zeroing
+ elif mapreduce_svm:
+ mode |= (0b1<<SVP64MODE.SVM) # sets SVM mode
+
+ # "failfirst" modes
+ elif sv_mode == 0b01:
+ assert src_zero == 0, "dest-zero not allowed in failfirst mode"
+ if failfirst == 'RC1':
+ mode |= (0b1<<SVP64MODE.RC1) # sets RC1 mode
+ mode |= (dst_zero << SVP64MODE.DZ) # predicate dst-zeroing
+ assert rc_mode==False, "ffirst RC1 only possible when Rc=0"
+ elif failfirst == '~RC1':
+ mode |= (0b1<<SVP64MODE.RC1) # sets RC1 mode
+ mode |= (dst_zero << SVP64MODE.DZ) # predicate dst-zeroing
+ mode |= (0b1<<SVP64MODE.INV) # ... with inversion
+ assert rc_mode==False, "ffirst RC1 only possible when Rc=0"
+ else:
+ assert dst_zero == 0, "dst-zero not allowed in ffirst BO"
+ assert rc_mode, "ffirst BO only possible when Rc=1"
+ mode |= (failfirst << SVP64MODE.BO_LSB) # set BO
+
+ # "saturation" modes
+ elif sv_mode == 0b10:
+ mode |= src_zero << SVP64MODE.SZ # predicate zeroing
+ mode |= dst_zero << SVP64MODE.DZ # predicate zeroing
+ mode |= (saturation << SVP64MODE.N) # signed/unsigned saturation
+
+ # "predicate-result" modes. err... code-duplication from ffirst
+ elif sv_mode == 0b11:
+ assert src_zero == 0, "dest-zero not allowed in predresult mode"
+ if predresult == 'RC1':
+ mode |= (0b1<<SVP64MODE.RC1) # sets RC1 mode
+ mode |= (dst_zero << SVP64MODE.DZ) # predicate dst-zeroing
+ assert rc_mode==False, "pr-mode RC1 only possible when Rc=0"
+ elif predresult == '~RC1':
+ mode |= (0b1<<SVP64MODE.RC1) # sets RC1 mode
+ mode |= (dst_zero << SVP64MODE.DZ) # predicate dst-zeroing
+ mode |= (0b1<<SVP64MODE.INV) # ... with inversion
+ assert rc_mode==False, "pr-mode RC1 only possible when Rc=0"
+ else:
+ assert dst_zero == 0, "dst-zero not allowed in pr-mode BO"
+ assert rc_mode, "pr-mode BO only possible when Rc=1"
+ mode |= (predresult << SVP64MODE.BO_LSB) # set BO
+
+ # whewww.... modes all done :)
+ # now put into svp64_rm
+ mode |= sv_mode
+ # mode: bits 19-23
+ svp64_rm.mode.eq(SelectableInt(mode, SVP64RM_MODE_SIZE))
+
+ # put in predicate masks into svp64_rm
+ if ptype == '2P':
+ # source pred: bits 16-18
+ svp64_rm.smask.eq(SelectableInt(smask, SVP64RM_SMASK_SIZE))
+ # mask mode: bit 0
+ svp64_rm.mmode.eq(SelectableInt(mmode, SVP64RM_MMODE_SIZE))
+ # 1-pred: bits 1-3
+ svp64_rm.mask.eq(SelectableInt(pmask, SVP64RM_MASK_SIZE))
+
+ # and subvl: bits 8-9
+ svp64_rm.subvl.eq(SelectableInt(subvl, SVP64RM_SUBVL_SIZE))
+
+ # put in elwidths
+ # srcwid: bits 6-7
+ svp64_rm.ewsrc.eq(SelectableInt(srcwid, SVP64RM_EWSRC_SIZE))
+ # destwid: bits 4-5
+ svp64_rm.elwidth.eq(SelectableInt(destwid, SVP64RM_ELWIDTH_SIZE))
+
+ # nice debug printout. (and now for something completely different)
+ # https://youtu.be/u0WOIwlXE9g?t=146
+ svp64_rm_value = svp64_rm.spr.value
+ log ("svp64_rm", hex(svp64_rm_value), bin(svp64_rm_value))
+ log (" mmode 0 :", bin(mmode))
+ log (" pmask 1-3 :", bin(pmask))
+ log (" dstwid 4-5 :", bin(destwid))
+ log (" srcwid 6-7 :", bin(srcwid))
+ log (" subvl 8-9 :", bin(subvl))
+ log (" mode 19-23:", bin(mode))
+ offs = 2 if etype == 'EXTRA2' else 3 # 2 or 3 bits
+ for idx, sv_extra in extras.items():
+ if idx is None: continue
+ srcdest, idx, duplicate = idx
+ start = (10+idx*offs)
+ end = start + offs-1
+ log (" extra%d %2d-%2d:" % (idx, start, end),
+ bin(sv_extra))
+ if ptype == '2P':
+ log (" smask 16-17:", bin(smask))
+ log ()
+
+ # first, construct the prefix from its subfields
+ svp64_prefix = SVP64PrefixFields()
+ svp64_prefix.major.eq(SelectableInt(0x1, SV64P_MAJOR_SIZE))
+ svp64_prefix.pid.eq(SelectableInt(0b11, SV64P_PID_SIZE))
+ svp64_prefix.rm.eq(svp64_rm.spr)
+
+ # fiinally yield the svp64 prefix and the thingy. v3.0b opcode
+ rc = '.' if rc_mode else ''
+ yield ".long 0x%x" % svp64_prefix.insn.value
+ yield "%s %s" % (v30b_op+rc, ", ".join(v30b_newfields))
+ log ("new v3.0B fields", v30b_op, v30b_newfields)
- # "mapreduce" modes
- elif sv_mode == 0b00:
- mode |= (0b1<<SVP64MODE.REDUCE) # sets mapreduce
- assert dst_zero == 0, "dest-zero not allowed in mapreduce mode"
- if mapreduce_crm:
- mode |= (0b1<<SVP64MODE.CRM) # sets CRM mode
- assert rc_mode, "CRM only allowed when Rc=1"
- # bit of weird encoding to jam zero-pred or SVM mode in.
- # SVM mode can be enabled only when SUBVL=2/3/4 (vec2/3/4)
- if subvl == 0:
- mode |= dst_zero << SVP64MODE.DZ # predicate zeroing
- elif mapreduce_svm:
- mode |= (0b1<<SVP64MODE.SVM) # sets SVM mode
-
- # "failfirst" modes
- elif sv_mode == 0b01:
- assert src_zero == 0, "dest-zero not allowed in failfirst mode"
- if failfirst == 'RC1':
- mode |= (0b1<<SVP64MODE.RC1) # sets RC1 mode
- mode |= (dst_zero << SVP64MODE.DZ) # predicate dst-zeroing
- assert rc_mode==False, "ffirst RC1 only possible when Rc=0"
- elif failfirst == '~RC1':
- mode |= (0b1<<SVP64MODE.RC1) # sets RC1 mode
- mode |= (dst_zero << SVP64MODE.DZ) # predicate dst-zeroing
- mode |= (0b1<<SVP64MODE.INV) # ... with inversion
- assert rc_mode==False, "ffirst RC1 only possible when Rc=0"
- else:
- assert dst_zero == 0, "dst-zero not allowed in ffirst BO"
- assert rc_mode, "ffirst BO only possible when Rc=1"
- mode |= (failfirst << SVP64MODE.BO_LSB) # set BO
+ def translate(self, lst):
+ for insn in lst:
+ yield from self.translate_one(insn)
+
+
+def asm_process():
+
+ # get an input file and an output file
+ args = sys.argv[1:]
+ if len(args) == 0:
+ infile = sys.stdin
+ outfile = sys.stdout
+ elif len(args) != 2:
+ print ("pysvp64asm [infile | -] [outfile | -]")
+ exit(0)
+ else:
+ if args[0] == '--':
+ infile = sys.stdin
+ else:
+ infile = open(args[0], "r")
+ if args[1] == '--':
+ outfile = sys.stdout
+ else:
+ outfile = open(args[1], "w")
+
+ # read the line, look for "sv", process it
+ isa = SVP64Asm([])
+ for line in infile.readlines():
+ ls = line.split("#")
+ if len(ls) != 2:
+ outfile.write(line)
+ continue
+ potential= ls[1].strip()
+ if not potential.startswith("sv."):
+ outfile.write(line)
+ continue
+ # find whitespace
+ ws = ''
+ while line:
+ if not line[0].isspace():
+ break
+ ws += line[0]
+ line = line[1:]
+
+ # SV line indentified
+ lst = list(isa.translate_one(potential))
+ lst = '; '.join(lst)
+ outfile.write("%s%s # %s\n" % (ws, lst, potential))
- # "saturation" modes
- elif sv_mode == 0b10:
- mode |= src_zero << SVP64MODE.SZ # predicate zeroing
- mode |= dst_zero << SVP64MODE.DZ # predicate zeroing
- mode |= (saturation << SVP64MODE.N) # signed/unsigned saturation
-
- # "predicate-result" modes. err... code-duplication from ffirst
- elif sv_mode == 0b11:
- assert src_zero == 0, "dest-zero not allowed in predresult mode"
- if predresult == 'RC1':
- mode |= (0b1<<SVP64MODE.RC1) # sets RC1 mode
- mode |= (dst_zero << SVP64MODE.DZ) # predicate dst-zeroing
- assert rc_mode==False, "pr-mode RC1 only possible when Rc=0"
- elif predresult == '~RC1':
- mode |= (0b1<<SVP64MODE.RC1) # sets RC1 mode
- mode |= (dst_zero << SVP64MODE.DZ) # predicate dst-zeroing
- mode |= (0b1<<SVP64MODE.INV) # ... with inversion
- assert rc_mode==False, "pr-mode RC1 only possible when Rc=0"
- else:
- assert dst_zero == 0, "dst-zero not allowed in pr-mode BO"
- assert rc_mode, "pr-mode BO only possible when Rc=1"
- mode |= (predresult << SVP64MODE.BO_LSB) # set BO
-
- # whewww.... modes all done :)
- # now put into svp64_rm
- mode |= sv_mode
- # mode: bits 19-23
- svp64_rm.mode.eq(SelectableInt(mode, SVP64RM_MODE_SIZE))
-
- # put in predicate masks into svp64_rm
- if ptype == '2P':
- # source pred: bits 16-18
- svp64_rm.smask.eq(SelectableInt(smask, SVP64RM_SMASK_SIZE))
- # mask mode: bit 0
- svp64_rm.mmode.eq(SelectableInt(mmode, SVP64RM_MMODE_SIZE))
- # 1-pred: bits 1-3
- svp64_rm.mask.eq(SelectableInt(pmask, SVP64RM_MASK_SIZE))
-
- # and subvl: bits 8-9
- svp64_rm.subvl.eq(SelectableInt(subvl, SVP64RM_SUBVL_SIZE))
-
- # put in elwidths
- # srcwid: bits 6-7
- svp64_rm.ewsrc.eq(SelectableInt(srcwid, SVP64RM_EWSRC_SIZE))
- # destwid: bits 4-5
- svp64_rm.elwidth.eq(SelectableInt(destwid, SVP64RM_ELWIDTH_SIZE))
-
- # nice debug printout. (and now for something completely different)
- # https://youtu.be/u0WOIwlXE9g?t=146
- svp64_rm_value = svp64_rm.spr.value
- log ("svp64_rm", hex(svp64_rm_value), bin(svp64_rm_value))
- log (" mmode 0 :", bin(mmode))
- log (" pmask 1-3 :", bin(pmask))
- log (" dstwid 4-5 :", bin(destwid))
- log (" srcwid 6-7 :", bin(srcwid))
- log (" subvl 8-9 :", bin(subvl))
- log (" mode 19-23:", bin(mode))
- offs = 2 if etype == 'EXTRA2' else 3 # 2 or 3 bits
- for idx, sv_extra in extras.items():
- if idx is None: continue
- srcdest, idx, duplicate = idx
- start = (10+idx*offs)
- end = start + offs-1
- log (" extra%d %2d-%2d:" % (idx, start, end),
- bin(sv_extra))
- if ptype == '2P':
- log (" smask 16-17:", bin(smask))
- log ()
-
- # first, construct the prefix from its subfields
- svp64_prefix = SVP64PrefixFields()
- svp64_prefix.major.eq(SelectableInt(0x1, SV64P_MAJOR_SIZE))
- svp64_prefix.pid.eq(SelectableInt(0b11, SV64P_PID_SIZE))
- svp64_prefix.rm.eq(svp64_rm.spr)
-
- # fiinally yield the svp64 prefix and the thingy. v3.0b opcode
- rc = '.' if rc_mode else ''
- yield ".long 0x%x" % svp64_prefix.insn.value
- yield "%s %s" % (v30b_op+rc, ", ".join(v30b_newfields))
- log ("new v3.0B fields", v30b_op, v30b_newfields)
if __name__ == '__main__':
lst = ['slw 3, 1, 4',
isa = SVP64Asm(lst)
print ("list", list(isa))
csvs = SVP64RM()
+ asm_process()
projects / openpower-isa.git / commitdiff