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# See copyright, etc in below POD section. |
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###################################################################### |
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package SystemC::Vregs::Output::CBitFields; |
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use SystemC::Vregs::Number; |
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use SystemC::Vregs::Language; |
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use Carp; |
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use strict; |
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use vars qw($VERSION); |
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use base qw(SystemC::Vregs::Output::Class); # So we get enum_struct_write |
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582
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$VERSION = '1.470'; |
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###################################################################### |
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# CONSTRUCTOR |
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sub new { |
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my $class = shift; |
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my $self = {@_}; |
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bless $self, $class; |
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return $self; |
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} |
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###################################################################### |
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###################################################################### |
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###################################################################### |
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###################################################################### |
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sub _class_h_write_dw { |
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0
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my $self = shift; |
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0
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my $typeref = shift; |
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0
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my $pack = shift; |
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0
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my $fl = shift; |
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0
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0
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my $wget = $fl->call_str($typeref->{name},"","w("); |
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0
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0
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my $wset = $fl->call_str($typeref->{name},"set","w("); |
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0
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0
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0
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if (($typeref->{words}||0) > 1) { |
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# make full dw accessors if the type is >32 bits |
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0
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0
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$fl->fn($typeref->{name},"","inline uint64_t dw(int b) const", |
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,"{\n" |
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."\tunion {uint64_t udw; uint32_t lw[2];} u;\n" |
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."\tu.lw[0]=${wget}b*2+0); u.lw[1]=${wget}b*2+1); return u.udw; }\n"); |
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0
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0
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$fl->fn($typeref->{name},"set","inline void dw(int b, uint64_t val)" |
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,"{\n" |
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."\tunion {uint64_t udw; uint32_t lw[2];} u;\n" |
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."\tu.udw=val; ${wset}b*2+0,u.lw[0]); ${wset}b*2+1,u.lw[1]); }\n"); |
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} else { |
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# still make dw accessors, but don't read or write w[1] because |
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# it doesn't exist. |
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0
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0
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$fl->fn($typeref->{name},"","inline uint64_t dw(int b) const" |
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,"{\n" |
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."\tunion {uint64_t udw; uint32_t lw[2];} u;\n" |
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."\tu.lw[0]=${wget}b*2+0); u.lw[1]=0; return u.udw; }\n"); |
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0
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0
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$fl->fn($typeref->{name},"set","inline void dw(int b, uint64_t val)" |
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,"{\n" |
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."\tunion {uint64_t udw; uint32_t lw[2];} u;\n" |
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."\tu.udw=val; ${wset}b*2+0,u.lw[0]); }\n"); |
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} |
60
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} |
61
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62
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63
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sub _class_write { |
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7
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9
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my $self = shift; |
65
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18
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my $typeref = shift; |
66
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7
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9
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my $pack = shift; |
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11
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my $fl = shift; |
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69
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50
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24
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my $clname = $typeref->{name} || "x"; |
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71
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23
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$fl->print("typedef struct {\n"); |
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#use Data::Dumper; $fl->print(Dumper($typeref->{bitarray})); |
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74
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# What fields are non-contiguous? We need to add _#'s to differentiate the parts. |
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9
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my %noncontig; |
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my %width_by_lsb; |
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0
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0
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my $lastbitref; |
78
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11
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my $fieldlsb = undef; |
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11
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for (my $bit=0; $bit<=$#{$typeref->{bitarray}}; $bit++) { |
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487
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1308
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80
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480
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1072
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my $bitref = $typeref->{bitarray}[$bit]{bitref}; |
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480
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100
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100
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2271
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if ($bitref && (!$lastbitref || $bitref != $lastbitref)) { # LSB of bitref |
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66
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82
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34
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42
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$fieldlsb = $bit; |
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} |
84
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480
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100
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100
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2711
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if ($bitref && $lastbitref && $bitref != $lastbitref |
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100
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100
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85
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&& defined $noncontig{$bitref->{name}}) { |
86
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5
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15
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$noncontig{$bitref->{name}} = 1; # 1=duplicate |
87
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} |
88
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480
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100
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962
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if ($bitref) { |
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388
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100
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1474
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$noncontig{$bitref->{name}} ||= 0; # 0=seen |
90
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388
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546
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$width_by_lsb{$fieldlsb}++; |
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} |
92
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480
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788
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$lastbitref = $bitref; |
93
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} |
94
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95
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7
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13
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my $padbits = 0; |
96
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7
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8
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my $padnum = 0; |
97
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7
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9
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$lastbitref = undef; |
98
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7
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10
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for (my $bit=0; $bit<=$#{$typeref->{bitarray}}; $bit++) { |
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133
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339
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99
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126
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197
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my $bitref = $typeref->{bitarray}[$bit]{bitref}; |
100
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126
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100
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200
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if ($bitref) { |
101
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34
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100
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64
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if ($padbits) { |
102
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# Need to output padding before this field |
103
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8
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50
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42
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$fl->printf(" %s\t_pad_%d:%d;\n", |
104
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(($padbits > 32) ? "uint64_t" : "uint32_t"), |
105
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$padnum++, $padbits); |
106
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8
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17
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$padbits = 0; |
107
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} |
108
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34
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100
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66
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283
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if ($bitref && $lastbitref && $bitref != $lastbitref |
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66
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100
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109
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&& $noncontig{$bitref->{name}}) { |
110
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# Increment the suffix each time we hit a split in the non-contiguous field |
111
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6
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11
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$noncontig{$bitref->{name}}++; |
112
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} |
113
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114
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34
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147
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(my $lc_mnem = $bitref->{name}) =~ s/^(.)/lc $1/xe; |
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34
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99
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115
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34
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44
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my $nc_suffix = ""; |
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34
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100
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105
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$nc_suffix = "_".$noncontig{$bitref->{name}} if $noncontig{$bitref->{name}}; |
117
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118
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34
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50
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168
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$fl->printf(" %s\t%s:%d;\n", |
119
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(($width_by_lsb{$bit} > 32) ? "uint64_t" : "uint32_t"), |
120
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$lc_mnem.$nc_suffix, $width_by_lsb{$bit}); |
121
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# Jump ahead a number of bits |
122
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34
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97
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$bit += $width_by_lsb{$bit} - 1; |
123
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} else { |
124
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92
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100
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$padbits++; |
125
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} |
126
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126
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179
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$lastbitref = $bitref; |
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} |
128
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129
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7
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26
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$fl->print("} $clname;\n"); |
130
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7
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26
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$fl->print("\n"); |
131
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} |
132
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133
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sub write { |
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1
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1
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1
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2
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my $self = shift; |
135
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1
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7
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my %params = (@_); |
136
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1
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50
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6
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my $pack = $params{pack} or croak "%Error: No pack=> parameter passed,"; |
137
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# Dump headers for class name based accessors |
138
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139
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1
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13
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my $fl = SystemC::Vregs::File->open(language=>'C', |
140
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rules => $pack->{rules}, |
141
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%params); |
142
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143
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1
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22
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$fl->include_guard(); |
144
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1
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4
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$fl->print("\n"); |
145
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1
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7
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$fl->comment("package $pack->{name}\n"); |
146
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1
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4
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$fl->print("\n"); |
147
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148
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1
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6
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$pack->{rules}->execute_rule ('defines_file_before', 'file_body', $pack); |
149
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150
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1
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4
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$fl->print("// Vregs library Files:\n"); |
151
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1
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2
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foreach my $packref (@{$pack->{libraries}}) { |
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5
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152
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0
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0
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$fl->print("#include \"$packref->{name}_bitfields.h\"\n"); |
153
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} |
154
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155
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1
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13
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$fl->print("\n\n"); |
156
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157
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1
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7
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foreach my $typeref ($pack->enums_sorted) { |
158
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2
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17
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$self->enum_struct_write ($typeref, $pack, $fl); |
159
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} |
160
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161
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1
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6
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$fl->print("\n\n"); |
162
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# Bitbashing done verbosely to avoid slow preprocess time |
163
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# We could use bit structures, but they don't work on non-contiguous fields |
164
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165
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# Sorted first does base classes, then children |
166
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1
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9
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foreach my $typeref ($pack->types_sorted) { |
167
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7
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25
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$self->_class_write($typeref, $pack, $fl); |
168
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} |
169
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170
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1
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14
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$pack->{rules}->execute_rule ('defines_file_after', 'file_body', $pack); |
171
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172
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1
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30
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$fl->close(); |
173
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} |
174
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175
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###################################################################### |
176
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###################################################################### |
177
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#### Package return |
178
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1; |
179
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__END__ |