Instruction Set Summary
The following tables provide a quick summary of the names, opcodes, instruction stream and stack interaction of the TrueType instruction set.
The first table lists those instructions that take data from the instruction stream and place it onto the interpreter stack. The second table lists the remaining TrueType instructions which take their arguments from the stack.
Table 1 Instructions taking data from the instruction stream
|
Instruction |
Opcode |
From Instruction Stream |
Pushes |
|---|---|---|---|
| NPUSHB[ ] | 0x40 | n, b1, b2,...bn | b1,b2...bn |
| NPUSHW[ ] | 0x41 | n, w1, w2,...w | w1,w2...wn |
| PUSHB[abc] | 0xB0 - 0xB7 | b0, b1,..bn | b0, b1, ...,bn |
| PUSHW[abc] | 0xB8 - 0xBF | w0,w1,..wn | w0 ,w1, ...wn |
Table 2 Instructions taking data from the interpreter stack
|
Instruction |
Opcode |
Pops |
Pushes |
|---|---|---|---|
| AA[ ] | 0x7F | p | - |
| ABS[ ] | 0x64 | n | |n| |
| ADD[ ] | 0x60 | n2, n1 | (n1 + n2) |
| ALIGNPTS[ ] | 0x27 | p2, p1 | - |
| ALIGNRP[ ] | 0x3C | p1, p2, ... , ploopvalue | - |
| AND[ ] | 0x5A | e2, e1 | b |
| CALL[ ] | 0x2B | f | - |
| CEILING[ ] | 0x67 | n | Èn |
| CINDEX[ ] | 0x25 | k | ek |
| CLEAR[ ] | 0x22 | all items on the stack | - |
| DEBUG[ ] | 0x4F | n | - |
| DELTAC1[ ], | 0x73 | argn, cn, argn-1,cn-1, , arg1, c1 | - |
| DELTAC2[ ] | 0x74 | argn, cn, argn-1,cn-1, , arg1, c1 | - |
| DELTAC3[ ] | 0x75 | argn, cn, argn-1,cn-1, , arg1, c1 | - |
| DELTAP1[ ] | 0x5D | argn, pn, argn-1, pn-1, , arg1, p1 | - |
| DELTAP2[ ] | 0x71 | argn, pn, argn-1, pn-1, , arg1, p1 | - |
| DELTAP3[ ] | 0x72 | argn, pn, argn-1, pn-1, , arg1, p1 | - |
| DEPTH[ ] | 0x24 | - | n |
| DIV[ ] | 0x62 | n2, n1 | (n1 * 64)/ n2 |
| DUP[ ] | 0x20 | e | e, e |
| EIF[ ] | 0x59 | - | - |
| ELSE | 0x1B | - | - |
| ENDF[ ] | 0x2D | - | - |
| EQ[ ] | 0x54 | e2, e1 | b |
| EVEN[ ] | 0x57 | e | b |
| FDEF[ ] | 0x2C | f | - |
| FLIPOFF[ ] | 0x4E | - | - |
| FLIPON[ ] | 0x4D | - | - |
| FLIPPT[ ] | 0x80 | p1, p2, ..., ploopvalue | - |
| FLIPRGOFF[ ] | 0x82 | h, l | - |
| FLIPRGON[ ] | 0x81 | h, l | - |
| FLOOR[ ] | 0x66 | n | În° |
| GC[a] | 0x46 - 0x47 | p | c |
| GETINFO[ ] | 0x88 | selector | result |
| GFV[ ] | 0x0D | - | px, py |
| GPV[ ] | 0x0C | - | px, py |
| GT[ ] | 0x52 | e2, e1 | b |
| GTEQ[ ] | 0x53 | e2, e1 | b |
| IDEF[ ] | 0x89 | f | - |
| IF[ ] | 0x58 | e | - |
| INSTCTRL | 0x8E | s, v | - |
| IP[ ] | 0x39 | p1, p2, ... , ploopvalue | - |
| ISECT[ ] | 0x0F | a1, a0, b1, b0, p | - |
| IUP[a] | 0x30 - 0x31 | - | - |
| JMPR | 0x1C | offset | - |
| JROF[ ] | 0x79 | e, offset | - |
| JROT[ ] | 0x78 | e, offset | - |
| LOOPCALL[ ] | 0x2A | f, count | - |
| LT[ ] | 0x50 | e2, e1 | b |
| LTEQ[ ] | 0x51 | e2, e1 | b |
| MAX[ ] | 0X8B | e2, e1 | max(e1, e2) |
| MD[a] | 0x49 - 0x4A | p2,p1 | d |
| MDAP[ a ] | 0x2E - 0x2F | p | - |
| MDRP[abcde] | 0xC0 - 0xDF | p | - |
| MIAP[a] | 0x3E - 0x3F | n, p | - |
| MIN[ ] | 0X8C | e2, e1 | min(e1, e2) |
| MINDEX[ ] | 0x26 | k | ek |
| MIRP[abcde] | 0xE0 - 0xFF | n, p | - |
| MPPEM[ ] | 0x4B | - | ppem |
| MPS[ ] | 0x4C | - | pointSize |
| MSIRP[a] | 0x3A - 0x3B | d, p | - |
| MUL[ ] | 0x63 | n2, n1 | (n1 * n2)/64 |
| NEG[ ] | 0x65 | n | -n |
| NEQ[ ] | 0x55 | e2, e1 | b |
| NOT[ ] | 0x5C | e | ( not e ) |
| NROUND[ab] | 0x6C - 0x6F | n1 | n2 |
| ODD[ ] | 0x56 | e | b |
| OR[ ] | 0x5B | e2, e1 | b |
| POP[ ] | 0x21 | e | - |
| RCVT[ ] | 0x45 | location | value |
| RDTG[ ] | 0x7D | - | - |
| ROFF[ ] | 0x7A | - | - |
| ROLL | 0x8a | a,b,c | b,a,c |
| ROUND[ab] | 0x68 - 0x6B | n1 | n2 |
| RS[ ] | 0x43 | n | v |
| RTDG[ ] | 0x3D | - | - |
| RTG[ ] | 0x18 | - | - |
| RTHG[ ] | 0x19 | - | - |
| RUTG[ ] | 0x7C | - | - |
| S45ROUND[ ] | 0x77 | n | - |
| SANGW[ ] | 0x7E | weight | - |
| SCANCTRL[ ] | 0x85 | n | - |
| SCANTYPE[ ] | 0x8D | n | - |
| SCFS[ ] | 0x48 | c, p | - |
| SCVTCI[ ] | 0x1D | n | - |
| SDB[ ] | 0x5E | n | - |
| SDPVTL[a] | 0x86 - 0x87 | p2, p1 | - |
| SDS[ ] | 0x5F | n | - |
| SFVFS[ ] | 0x0B | y, x | - |
| SFVTCA[a] | 0x04 - 0x05 | - | - |
| SFVTL[a] | 0x08 - 0x09 | p2, p1 | - |
| SFVTPV[ ] | 0x0E | - | - |
| SHC[a] | 0x34 - 0x35 | c | - |
| SHP[a] | 0x32 - 0x33 | p1, p2, ..., ploopvalue | - |
| SHPIX[ ] | 0x38 | d, p1, p2, ..., ploopvalue | - |
| SHZ[a] | 0x36 - 0x37 | e | - |
| SLOOP[ ] | 0x17 | n | - |
| SMD[ ] | 0x1A | distance | - |
| SPVFS[ ] | 0x0A | y, x | - |
| SPVTCA[a] | 0x02 - 0x03 | - | - |
| SPVTL[a] | 0x06 - 0x07 | p2, p1 | - |
| SROUND[ ] | 0x76 | n | - |
| SRP0[ ] | 0x10 | p | - |
| SRP1[ ] | 0x11 | p | - |
| SRP2[ ] | 0x12 | p | - |
| SSW[ ] | 0x1F | n | - |
| SSWCI[ ] | 0x1E | n | - |
| SUB[ ] | 0x61 | n2, n1 | (n1 - n2) |
| SVTCA[a] | 0x00 - 0x01 | - | - |
| SWAP[ ] | 0x23 | e2, e1 | e1, e2 |
| SZP0[ ] | 0x13 | n | - |
| SZP1[ ] | 0x14 | n | - |
| SZP2[ ] | 0x15 | n | - |
| SZPS[ ] | 0x16 | n | - |
| UTP[ ] | 0x29 | p | - |
| WCVTF[ ] | 0x70 | n, l | - |
| WCVTP[ ] | 0x44 | v, l | - |
| WS[ ] | 0x42 | v, l | - |