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authoriximeow <me@iximeow.net>2021-10-21 15:19:09 -0700
committeriximeow <me@iximeow.net>2021-10-21 15:22:29 -0700
commit4a03599767c0ebac12e730a837abe1d15ac800e5 (patch)
tree424cb49217ac9a6799e257ed61941c9da18ea613 /src/armv8/a64.rs
parenteadc1ab0ceb5b3cd5f88b696d72b5c0592a63da5 (diff)
data processing instructions (one source)
Diffstat (limited to 'src/armv8/a64.rs')
-rw-r--r--src/armv8/a64.rs62
1 files changed, 61 insertions, 1 deletions
diff --git a/src/armv8/a64.rs b/src/armv8/a64.rs
index 16a4116..60bbbed 100644
--- a/src/armv8/a64.rs
+++ b/src/armv8/a64.rs
@@ -647,6 +647,24 @@ impl Display for Instruction {
Opcode::CCMP => {
write!(fmt, "ccmp")?;
}
+ Opcode::RBIT => {
+ write!(fmt, "rbit")?;
+ }
+ Opcode::REV16 => {
+ write!(fmt, "rev16")?;
+ }
+ Opcode::REV => {
+ write!(fmt, "rev")?;
+ }
+ Opcode::REV32 => {
+ write!(fmt, "rev32")?;
+ }
+ Opcode::CLZ => {
+ write!(fmt, "clz")?;
+ }
+ Opcode::CLS => {
+ write!(fmt, "cls")?;
+ }
};
if self.operands[0] != Operand::Nothing {
@@ -816,6 +834,12 @@ pub enum Opcode {
PACIZA,
CCMN,
CCMP,
+ RBIT,
+ REV16,
+ REV,
+ REV32,
+ CLZ,
+ CLS,
}
#[derive(Copy, Clone, Debug, PartialEq)]
@@ -1304,6 +1328,9 @@ impl Decoder<ARMv8> for InstDecoder {
} else {
// X1X11010_110XXXXX_XXXXXXXX_XXXXXXXX
// Data-processing (1 source)
+ let sf = ((word >> 31) & 0x01) as u8;
+ let S = ((word >> 29) & 0x01) as u8;
+
let Rd = (word & 0x1f) as u16;
let Rn = ((word >> 5) & 0x1f) as u16;
let opcode = ((word >> 10) & 0x3f) as u8;
@@ -1313,9 +1340,42 @@ impl Decoder<ARMv8> for InstDecoder {
// however, PAC (added in v8.3) says otherwise.
match opcode2 {
0b00000 => {
- return Err(DecodeError::IncompleteDecoder);
+ if S != 0 {
+ return Err(DecodeError::InvalidOpcode);
+ }
+
+ let (opcode, size) = match (opcode << 1) | sf {
+ 0b000000_0 => (Opcode::RBIT, SizeCode::W),
+ 0b000000_1 => (Opcode::RBIT, SizeCode::X),
+ 0b000001_0 => (Opcode::REV16, SizeCode::W),
+ 0b000001_1 => (Opcode::REV16, SizeCode::X),
+ 0b000010_0 => (Opcode::REV, SizeCode::W),
+ 0b000010_1 => (Opcode::REV, SizeCode::X),
+ 0b000011_0 => (Opcode::Invalid, SizeCode::W),
+ 0b000011_1 => (Opcode::REV32, SizeCode::X),
+ 0b000100_0 => (Opcode::CLZ, SizeCode::W),
+ 0b000100_1 => (Opcode::CLZ, SizeCode::X),
+ 0b000101_0 => (Opcode::CLS, SizeCode::W),
+ 0b000101_1 => (Opcode::CLS, SizeCode::X),
+ _ => (Opcode::Invalid, SizeCode::W),
+ };
+
+ inst.opcode = opcode;
+ inst.operands = [
+ Operand::Register(size, Rd),
+ Operand::Register(size, Rn),
+ Operand::Nothing,
+ Operand::Nothing,
+ ];
+
+ if opcode == Opcode::Invalid {
+ return Err(DecodeError::InvalidOpcode);
+ }
}
0b00001 => {
+ if S != 0 || sf != 1 {
+ return Err(DecodeError::InvalidOpcode);
+ }
match opcode {
0b000000 => {
inst.opcode = Opcode::PACIA;