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| author | David Mitchell <davem@iabyn.com> | 2014-08-21 20:16:48 +0100 |
|---|---|---|
| committer | David Mitchell <davem@iabyn.com> | 2014-09-10 14:25:05 +0100 |
| commit | 738ec38010d319318456d2882cb13e00547853de (patch) | |
| tree | 14e2f32b72c7d0e7fab94a65c8fbe62dc7290f9f /op.h | |
| parent | 1be0d08e5a9c1e6d52d56197d3bdcc2b919a8933 (diff) | |
| download | perl-738ec38010d319318456d2882cb13e00547853de.tar.gz | |
better document OA_ flags
Its a bit confusing which bits in PL_opargs are used for what,
and which flags in regen/opcodes map to which OA_* value
Diffstat (limited to 'op.h')
| -rw-r--r-- | op.h | 5 |
1 files changed, 3 insertions, 2 deletions
@@ -617,7 +617,7 @@ struct loop { #define OA_DANGEROUS 64 #define OA_DEFGV 128 -/* The next 4 bits encode op class information */ +/* The next 4 bits (8..11) encode op class information */ #define OCSHIFT 8 #define OA_CLASS_MASK (15 << OCSHIFT) @@ -637,9 +637,10 @@ struct loop { #define OA_FILESTATOP (12 << OCSHIFT) #define OA_LOOPEXOP (13 << OCSHIFT) +/* Each remaining nybble of PL_opargs (i.e. bits 12..15, 16..19 etc) + * encode the type for each arg */ #define OASHIFT 12 -/* Remaining nybbles of PL_opargs */ #define OA_SCALAR 1 #define OA_LIST 2 #define OA_AVREF 3 |