From d4e329532c7593fe12d78837db590643c0a214d1 Mon Sep 17 00:00:00 2001 From: iximeow Date: Wed, 29 Dec 2021 16:50:22 -0800 Subject: ldapr/stlr (unscaled immediate) --- src/armv8/a64.rs | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) (limited to 'src/armv8') diff --git a/src/armv8/a64.rs b/src/armv8/a64.rs index 9dec1d4..fef3a5a 100644 --- a/src/armv8/a64.rs +++ b/src/armv8/a64.rs @@ -1249,6 +1249,16 @@ pub enum Opcode { STZG, ST2G, STZ2G, + + LDAPUR, + LDAPURB, + LDAPURH, + LDAPURSB, + LDAPURSH, + LDAPURSW, + STLUR, + STLURB, + STLURH, } impl Display for Opcode { @@ -2018,6 +2028,15 @@ impl Display for Opcode { Opcode::STZG => "stzg", Opcode::ST2G => "st2g", Opcode::STZ2G => "stz2g", + Opcode::LDAPUR => "ldapur", + Opcode::LDAPURB => "ldapurb", + Opcode::LDAPURH => "ldapurh", + Opcode::LDAPURSB => "ldapursb", + Opcode::LDAPURSH => "ldapursh", + Opcode::LDAPURSW => "ldapursw", + Opcode::STLUR => "stlur", + Opcode::STLURB => "stlurb", + Opcode::STLURH => "stlurh", Opcode::Bcc(cond) => { return write!(fmt, "b.{}", Operand::ConditionCode(cond)); @@ -7434,6 +7453,39 @@ impl Decoder for InstDecoder { return Err(DecodeError::InvalidOpcode); } // else, `LDAPR/STLR (unscaled immediate)` + let size = (word >> 30) & 0b11; + let opc = (word >> 22) & 0b11; + let imm9 = (word >> 12) & 0b111_111_111; + let Rn = ((word >> 5) & 0b11111) as u16; + let Rt = ((word >> 0) & 0b11111) as u16; + + let simm = ((imm9 as i16) << 7) >> 7; + let index = (size << 2) | opc; + + if index == 0b1011 || index >= 0b1110 { + return Err(DecodeError::InvalidOpcode); + } + + let opcode = &[ + Opcode::STLURB, Opcode::LDAPURB, Opcode::LDAPURSB, Opcode::LDAPURSB, + Opcode::STLURH, Opcode::LDAPURH, Opcode::LDAPURSH, Opcode::LDAPURSH, + Opcode::STLUR, Opcode::LDAPUR, Opcode::LDAPURSW, Opcode::Invalid, + Opcode::STLUR, Opcode::LDAPUR, Opcode::Invalid, Opcode::Invalid, + ][index as usize]; + + let size = if size == 0b11 || opc == 0b10 { + SizeCode::X + } else { + SizeCode::W + }; + + inst.opcode = *opcode; + inst.operands = [ + Operand::Register(size, Rt), + Operand::RegOffset(Rn, simm), + Operand::Nothing, + Operand::Nothing, + ]; } else { if op0 != 0b1101 { return Err(DecodeError::InvalidOpcode); -- cgit v1.1