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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 -


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