T0b1/test-repo
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

decode: Move instr-width to legacy path

Browse Source 
Very few instructions set use instrwidth, so move this check as well to
the legacy path. The only affected common instructions are RET and
LEAVE.
This commit is contained in:
Alexis Engelke
2023-04-24 08:55:56 +02:00
parent 48f886e130
commit 6abc971576
2 changed files with 7 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
parseinstrs.py
View File

@@ -276,17 +276,17 @@ class InstrDesc(NamedTuple):
else: # either empty or GP operand size
dynsizes = [OpKind.SZ_OP]
if "SZ8" in self.flags:
extraflags["opsize"] = 1
dynsizes = []
if "D64" in self.flags: extraflags["opsize"] = 2
if "F64" in self.flags: extraflags["opsize"] = 3
extraflags["instr_width"] = "INSTR_WIDTH" in self.flags
extraflags["lock"] = "LOCK" in self.flags
if "SZ8" in self.flags or mnem in ("MOVSX", "MOVZX", "XCHG_NOP", "3DNOW"):
if "SZ8" not in self.flags and "INSTR_WIDTH" in self.flags:
raise Exception("legacy instr with +w without SZ8")
if (self.flags & {"SZ8", "INSTR_WIDTH"} or
mnem in ("MOVSX", "MOVZX", "XCHG_NOP", "3DNOW")):
extraflags["legacy"] = 1
# INSTR_WIDTH defaults to zero, so only enable when SZ8 is unset
if "INSTR_WIDTH" in self.flags and "SZ8" not in self.flags:
extraflags["instr_width"] = 1
imm_byte = self.imm_size(4) == 1
extraflags["imm_control"] = flags.imm_control | imm_byte