-rwxr-xr-x 6932 lib25519-20220726/scripts-build/checkinsns raw
#!/usr/bin/env python3
import os
import sys
import subprocess
host = sys.argv[1]
if host != 'amd64':
sys.stderr.write('warning: this script does not know how to check instruction-set extensions for %s\n' % host)
sys.exit(0)
sys.stderr.write('scanning...\n')
sys.stdout.flush()
carch = {}
for c in os.listdir('compilerarch'):
with open('compilerarch/%s' % c) as f:
carch[c] = f.read().strip()
if carch[c] == 'default': carch[c] = host
assert carch[c].split('+')[0] == host
insns = {}
with open('scripts/intel-instructions') as f:
for line in f:
mnem,args,ext = line.split()
if mnem not in insns: insns[mnem] = []
insns[mnem] += [(args,ext)]
aliases = {
'movabs':'mov', # XXX
'movs':'movsb', # XXX
'stos':'stosb', # XXX
'cmovnae':'cmovb',
'cmovc':'cmovb',
'cmovna':'cmovbe',
'cmovnge':'cmovl',
'cmovng':'cmovle',
'cmovae':'cmovnb',
'cmovnc':'cmovnb',
'cmova':'cmovnbe',
'cmovge':'cmovnl',
'cmovg':'cmovnle',
'cmovpo':'cmovnp',
'cmovne':'cmovnz',
'cmovpe':'cmovp',
'cmove':'cmovz',
'setnae':'setb',
'setc':'setb',
'setna':'setbe',
'setnge':'setl',
'setng':'setle',
'setae':'setnb',
'setnc':'setnb',
'seta':'setnbe',
'setge':'setnl',
'setg':'setnle',
'setpo':'setnp',
'setne':'setnz',
'setpe':'setp',
'sete':'setz',
'jnae':'jb',
'jc':'jb',
'jna':'jbe',
'jnge':'jl',
'jng':'jle',
'jae':'jnb',
'jnc':'jnb',
'ja':'jnbe',
'jge':'jnl',
'jg':'jnle',
'jpo':'jnp',
'jne':'jnz',
'jpe':'jp',
'je':'jz',
}
def argsmatch(args,insnargs,ext):
if args == '-':
if insnargs == '':
return True
xmmlimit = 16
ymmlimit = 16
if ext.startswith('avx512'):
# XXX: this is really just for avx512vl
xmmlimit = 32
ymmlimit = 32
args = args.split(',')
if args[-2:] == ['base','index']: args = args[:-2]
insnargs = insnargs.replace('{k0}',',k0')
insnargs = insnargs.replace('{k1}',',k1')
insnargs = insnargs.replace('{k2}',',k2')
insnargs = insnargs.replace('{k3}',',k3')
insnargs = insnargs.replace('{k4}',',k4')
insnargs = insnargs.replace('{k5}',',k5')
insnargs = insnargs.replace('{k6}',',k6')
insnargs = insnargs.replace('{k7}',',k7')
insnargs = insnargs.split(',')
if len(insnargs) != len(args): return False
for a,i in zip(args,insnargs):
if a in ('r','vr'):
if i not in ('rax','rbx','rcx','rdx','rsi','rdi','rbp','rsp','r8','r9','r10','r11','r12','r13','r14','r15'):
if i not in ('eax','ebx','ecx','edx','esi','edi','ebp','esp','r8d','r9d','r10d','r11d','r12d','r13d','r14d','r15d'):
if i not in ('ax','bx','cx','dx','si','di','sp','bp','r8w','r9w','r10w','r11w','r12w','r13w','r14w','r15w'):
if i not in ('al','bl','cl','dl','ah','bh','ch','dh','sil','dil','bpl','spl','r8b','r9b','r10b','r11b','r12b','r13b','r14b','r15b'):
return False
elif a in ('r8','vr8'):
if i not in ('al','bl','cl','dl','ah','bh','ch','dh','sil','dil','bpl','spl','r8b','r9b','r10b','r11b','r12b','r13b','r14b','r15b'):
return False
elif a in ('r16','vr16'):
if i not in ('ax','bx','cx','dx','si','di','sp','bp','r8w','r9w','r10w','r11w','r12w','r13w','r14w','r15w'):
return False
elif a in ('r32','vr32'):
if i not in ('eax','ebx','ecx','edx','esi','edi','esp','ebp','r8d','r9d','r10d','r11d','r12d','r13d','r14d','r15d'):
return False
elif a in ('r64','vr64'):
if i not in ('rax','rbx','rcx','rdx','rsi','rdi','rsp','rbp','r8','r9','r10','r11','r12','r13','r14','r15'):
return False
elif a == 'xmm':
if i not in ['xmm%d'%j for j in range(xmmlimit)]:
return False
elif a == 'ymm':
if i not in ['ymm%d'%j for j in range(ymmlimit)]:
return False
elif a == 'zmm':
if i not in ['zmm%d'%j for j in range(32)]:
return False
elif a == 'k':
if i not in ('k0','k1','k2','k3','k4','k5','k6','k7'):
return False
elif a in ('m','agen'):
if '[' not in i:
if 'PTR' not in i:
return False
elif a == 'relbr':
if not all(c in '0123456789abcdef' for c in i):
return False
elif a == 'imm':
if not i.startswith('0x'):
if not i.isnumeric():
return False
else:
return False
return True
def extok(arch,ext):
arch = arch.split('+')[1:]
if ext in ('base','i86','i186','i286','i386','i486real','longmode','x87','sse','sse2','cmov','fat_nop'):
return True # amd64 guarantees support for these
if ext in ('sse4.1','sse4.2','avx'): return 'avx' in arch
if ext in ('bmi1','bmi2'): return 'bmi2' in arch
if ext == 'adx': return 'adx' in arch
if ext == 'avx2': return 'avx2' in arch
if ext == 'avx512f': return 'avx512f' in arch
if ext == 'avx512vl': return 'avx512vl' in arch
if ext == 'avx512ifma': return 'avx512ifma' in arch
return False # XXX
def checkinsn(obj,arch,insn):
insn = insn.split()
if host == 'amd64' and insn == ['endbr64']:
return # XXX
if host == 'amd64' and insn == ['xgetbv'] and (obj.startswith('compilers/') or obj.startswith('cpuid/')):
return # assume dispatch code is using xgetbv carefully
while len(insn) >= 1 and insn[0] in ('data16','rep','repe','repz'):
insn = insn[1:]
if len(insn) == 0: return
mnem = insn[0]
if mnem in aliases:
mnem = aliases[mnem]
if mnem not in insns:
sys.stderr.write('warning: unknown mnemonic %s\n' % mnem)
return
for args,ext in insns[mnem]:
if argsmatch(args,' '.join(insn[1:]),ext):
if not extok(arch,ext):
sys.stderr.write('warning: %s: %s instruction set does not allow %s: %s\n' % (obj,arch,ext,' '.join(insn)))
return
sys.stderr.write('warning: %s: no args match for %s\n' % (obj,' '.join(insn)))
for d in sys.stdin:
d = d.strip()
objs = [d+'/'+fn for fn in os.listdir(d) if fn.endswith('.o')]
if len(d.split('/')) < 3:
arch = host # no instruction-set extensions allowed
else:
arch = carch[d.split('/')[2]]
try:
# XXX: in principle should inspect raw insns for, e.g., EVEX vs. VEX
p = subprocess.Popen(['objdump','-d','-M','intel-mnemonic','-M','intel','--no-show-raw-insn']+objs,stdout=subprocess.PIPE,stderr=subprocess.STDOUT,universal_newlines=True)
out,err = p.communicate()
if err:
sys.stderr.write('warning: objdump error: %s\n' % err)
elif p.returncode:
sys.stderr.write('warning: objdump failure: %s\n' % p.returncode)
else:
obj = 'unknown-object-file'
for line in out.splitlines():
if len(objs) > 0 and line.startswith('%s:'%objs[0]):
obj,objs = objs[0],objs[1:]
if '\t' in line:
line = line[line.index('\t')+1:]
if '#' in line:
line = line[:line.index('#')]
if '<' in line:
line = line[:line.index('<')]
checkinsn(obj,arch,line)
except Exception as e:
sys.stderr.write('warning: objdump failure: %s' % e)