diff options
Diffstat (limited to 'twasm/README.md')
| -rw-r--r-- | twasm/README.md | 86 |
1 files changed, 48 insertions, 38 deletions
diff --git a/twasm/README.md b/twasm/README.md index 8d0ce3b..3ec90b6 100644 --- a/twasm/README.md +++ b/twasm/README.md @@ -230,11 +230,11 @@ entries are as follows: 16 bytes +------------------------------+ | 0 operand operators | -+------------------------------+ -| 127 96 | -+------------------------------+ -| reserved | -+------------------------------+ ++---------+--------------------+ +| 127 120 | 119 96 | ++---------+--------------------+ +| flags | reserved | ++---------+--------------------+ | 95 64 | +------------------------------+ | reserved | @@ -249,39 +249,39 @@ entries are as follows: +----------+--------+----------+ 16 bytes -+-------------------------------------------------------------+ -| 1 operand operators | -+-------------------------------------------------------------+ -| 127 96 | -+-------------------------------------------------------------+ -| reserved | -+----------+-------+-------+-------+-------+----------+-------+ -| 95 88 | 87 84 | 83 80 | 79 76 | 75 72 | 71 68 | 67 64 | -+----------+-------+-------+-------+-------+----------+-------+ -| reserved | op5&8 | op4&8 | op3&8 | op2&8 | reserved | op0&8 | -+----------+-------+-------+-------+-------+----------+-------+ -| 63 56 | 55 48 | 47 40 | 39 32 | -+----------+---------------+---------------+------------------+ -| opcode | opcode | opcode | opcode | -| dst=rel8 | dst=rel | dst=imm8 | dst=imm | -+----------+---------------+---------------+------------------+ -| 31 24 | 23 16 | 15 0 | -+----------+---------------+----------------------------------+ -| reserved | opcode | token ID | -| | dst=r/m | | -+----------+---------------+----------------------------------+ ++------------------------------------------+ +| 1 operand operators | ++----------+----------+----------+---------+ +| 127 120 | 119 112 | 111 104 | 103 96 | ++----------+----------+----------+---------+ +| flags | reserved | flags5 | flags4 | ++----------+----------+----------+---------+ +| 95 88 | 87 80 | 79 72 | 71 64 | ++----------+----------+----------+---------+ +| flags3 | flags2 | reserved | flags0 | ++----------+----------+----------+---------+ +| 63 56 | 55 48 | 47 40 | 39 32 | ++----------+----------+----------+---------+ +| opcode | opcode | opcode | opcode | +| dst=rel8 | dst=rel | dst=imm8 | dst=imm | ++----------+----------+----------+---------+ +| 31 24 | 23 16 | 15 0 | ++----------+----------+--------------------+ +| reserved | opcode | token ID | +| | dst=r/m | | ++----------+----------+--------------------+ 16 bytes +-----------------------------------------------+ | 2 operand operators | -+-----------------------------------------------+ -| 127 96 | -+-----------------------------------------------+ -| reserved | -+---------+----------+-------+-------+----------+ -| 95 88 | 87 80 | 79 76 | 75 72 | 71 64 | -+---------+----------+-------+-------+----------+ -| flags | reserved | op3&8 | op2&8 | reserved | ++---------+-------------------------------------+ +| 127 120 | 119 96 | ++---------+-------------------------------------+ +| flags | reserved | ++---------+----------+--------------------------+ +| 95 88 | 87 80 | 79 64 | ++---------+----------+--------------------------+ +| flags3 | flags2 | reserved | +---------+----------+-------+-------+----------+ | 63 48 | 47 40 | 39 32 | +--------------------+---------------+----------+ @@ -305,9 +305,23 @@ entries are as follows: | reserved | 8bit | +----------+------+ +1 byte ++----------------------------------------------------+ +| flagsX byte | ++----------+-----------+-------------+---------------+ +| 7 5 | 4 | 3 | 2 0 | ++----------+-----------+-------------+---------------+ +| reserved | no ModR/M | 0x0F prefix | operator flag | ++----------+-----------+-------------+---------------+ + ; flags key: 8bit ; tte has opcodes for r/m8 and r8 instead of r/m and r respectively +; flagsX key: +no ModR/M ; there is no ModR/M byte for this opcode +0x0F prefix ; there is a 0x0F prefix for this opcode +operator flag ; contents of `reg` if applicable + ; key: r/m ; r/m 16/32/64 r/m8 ; r/m 8 @@ -317,10 +331,6 @@ imm ; imm 16/32 imm8 ; imm 8 rel ; rel 16/32 rel8 ; rel 8 - -opX&8 ; low 8 bits are the operator flag that goes with opcode at offset X from - ; the first opcode in the table entry. High bit is (somewhat confusingly) - ; a flag for whether or not the operator comes with an `0F` prefix ``` note much room to expand. If an opcode doesn't exist, it should be 0x00 |