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40.7 Data-Blocks and Other-immediates Typing

These are the other-immediate types. We specify them including all low eight bits, including the other-immediate tag, so we can think of the type bits as one type – not an other-immediate major type and a subtype. Also, fetching a byte and comparing it against a constant is more efficient than wasting even a small amount of time shifting out the other-immediate tag to compare against a five bit constant. (The current values can be obtained from the generated internals.h file.)

                                                         HEX
Number   (< 36)
  bignum                                           10     0A
    ratio                                          14     0E
    single-float                                   18     12
    double-float                                   22     16
    double-double-float                            26     1A
    complex                                        30     1E
    (complex single-float)                         34     22
    (complex double-float)                         38     26
    (complex double-double-float)                  42     2A

Array   (<= 46 code 118)
   Simple-Array   (<= 46 code 118)
         simple-array                              46     2E
      Vector  (<= 50 code 118)
         simple-string                             50     32
         simple-bit-vector                         54     36
         simple-vector                             58     3A
         (simple-array (unsigned-byte 2) (*))      62     3E
         (simple-array (unsigned-byte 4) (*))      66     42
         (simple-array (unsigned-byte 8) (*))      70     46
         (simple-array (unsigned-byte 16) (*))     74     4A
         (simple-array (unsigned-byte 32) (*))     78     4E
         (simple-array (signed-byte 8) (*))        82     52
         (simple-array (signed-byte 16) (*))       86     56
         (simple-array (signed-byte 30) (*))       90     5A
         (simple-array (signed-byte 32) (*))       94     5E
         (simple-array single-float (*))           98     62
         (simple-array double-float (*))           102    66
         (simple-array double-double-float (*))    106    6A
         (simple-array (complex single-float) (*)  110    6E
         (simple-array (complex double-float) (*)  114    72
         (simple-array (complex double-double) (*) 118    76
      complex-string                               122    7A
      complex-bit-vector                           126    7E
      (array * (*))   -- general complex vector.   130    82
   complex-array                                   134    86

code-header-type                                   138    8A
function-header-type                               142    8E
closure-header-type                                146    92
funcallable-instance-header-type                   150    96
byte-code-function-header-type                     154    9A
byte-code-closure-header-type                      158    9E
closure-function-header-type                       162    A2
return-pc-header-type (a.k.a LRA)                  166    A6
value-cell-header-type                             170    AA
symbol-header-type                                 174    AE
base-character-type                                178    B2
system-area-pointer-type (header type)             182    B6
unbound-marker                                     186    BA
weak-pointer-type                                  190    BE
instance-header-type                               194    C2
fdefn-type                                         198    C6
scavenger-hook-type                                202    CA