ref: 12e226ac6798412271020d42645f69138715c519
dir: /utils/sqz/squeeze.h/
/* * squeezed file format: * Sqhdr * original Exec header * two Squeeze tables * squeezed segment * unsqueezed segment, if any */ #define SQMAGIC (ulong)0xFEEF0F1E typedef struct Sqhdr Sqhdr; struct Sqhdr { uchar magic[4]; /* SQMAGIC */ uchar text[4]; /* squeezed length of text (excluding tables) */ uchar data[4]; /* squeezed length of data (excluding tables) */ uchar asis[4]; /* length of unsqueezed segment */ uchar toptxt[4]; /* value for 0 encoding in text */ uchar topdat[4]; /* value for 0 encoding in data */ uchar sum[4]; /* simple checksum of unsqueezed data */ uchar flags[4]; }; #define SQHDRLEN (8*4) /* * certain power instruction types are rearranged by sqz * so as to move the variable part of the instruction word to the * low order bits. note that the mapping is its own inverse. */ #define QREMAP(X)\ switch((X)>>26){\ case 19: case 31: case 59: case 63:\ (X) = (((X) & 0xFC00F801) | (((X)>>15)&0x7FE) | (((X)&0x7FE)<<15));\ }