denuvo-ref/miasm
1
0
Fork 0
mirror of https://github.com/cea-sec/miasm synced 2026-08-17 10:26:03 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

[arch/x86] add phminposuw instructions support

Browse source
This commit is contained in:
w4kfu 2026-03-20 13:42:47 +01:00
parent 8ca9855c53
commit b03beb7d4c
No known key found for this signature in database
2 changed files with 28 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

3
miasm/arch/x86/arch.py
View file

@ -4473,6 +4473,9 @@ addop("pminub", [bs8(0x0f), bs8(0xda), pref_66] +
addop("pminuw", [bs8(0x0f), bs8(0x38), bs8(0x3a), pref_66] +
rmmod(xmm_reg, rm_arg_xmm))
addop("phminposuw", [bs8(0x0f), bs8(0x38), bs8(0x41), pref_66] +
rmmod(xmm_reg, rm_arg_xmm_m128))
addop("pminud", [bs8(0x0f), bs8(0x38), bs8(0x3b), pref_66] +
rmmod(xmm_reg, rm_arg_xmm))

25
miasm/arch/x86/sem.py
View file

@ -4432,6 +4432,15 @@ def pshufhw(_, instr, dst, src, imm):
out.append(src[shift + 64: shift + 16 + 64])
return [m2_expr.ExprAssign(dst, m2_expr.ExprCompose(*out))], []
def ptest(_, instr, dst, src):
e = []
e.append(m2_expr.ExprAssign(zf, m2_expr.ExprOp('FLAG_EQ', dst & src)))
e.append(m2_expr.ExprAssign(cf, m2_expr.ExprOp('FLAG_EQ', src & ~dst)))
e.append(m2_expr.ExprAssign(of, m2_expr.ExprInt(0, 1)))
e.append(m2_expr.ExprAssign(af, m2_expr.ExprInt(0, 1)))
e.append(m2_expr.ExprAssign(pf, m2_expr.ExprInt(0, 1)))
e.append(m2_expr.ExprAssign(nf, m2_expr.ExprInt(0, 1)))
return e, []
def ps_rl_ll(ir, instr, dst, src, op, size):
mask = {16: 0xF,
@ -4918,7 +4927,21 @@ def _signed_to_unsigned_saturation(expr, dst_size):
)
)
def phminposuw(ir, instr, dst, src):
if dst.size != 128 or src.size != 128:
raise RuntimeError("Unsupported size dst=%d src=%d" % (dst.size, src.size))
min_val = src[:16]
min_idx = m2_expr.ExprInt(0, 16)
for i in range(1, 8):
word = src[i * 16:(i + 1) * 16]
cond = m2_expr.expr_is_unsigned_lower(word, min_val)
min_val = m2_expr.ExprCond(cond, word, min_val)
min_idx = m2_expr.ExprCond(cond, m2_expr.ExprInt(i, 16), min_idx)
result = m2_expr.ExprCompose(min_val, min_idx, m2_expr.ExprInt(0, 96))
return [m2_expr.ExprAssign(dst, result)], []
def packsswb(ir, instr, dst, src):
out = []
@ -5758,6 +5781,8 @@ mnemo_func = {'mov': mov,
"pmovmskb": pmovmskb,
"phminposuw": phminposuw,
"packsswb": packsswb,
"packssdw": packssdw,
"packuswb": packuswb,