diff options
Diffstat (limited to 'src/armv8/a64.rs')
| -rw-r--r-- | src/armv8/a64.rs | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/src/armv8/a64.rs b/src/armv8/a64.rs index 8ab4542..bfbec0b 100644 --- a/src/armv8/a64.rs +++ b/src/armv8/a64.rs @@ -5412,9 +5412,49 @@ impl Decoder<ARMv8> for InstDecoder { ]; } else if op2 & 0b0111 == 0b110 { // `Advanced SIMD scalar pairwise` + let Rd = word & 0b11111; + let Rn = (word >> 5) & 0b11111; let opcode = (word >> 12) & 0b11111; let size = (word >> 22) & 0b11; - return Err(DecodeError::IncompleteDecoder); + let U = (word >> 29) & 1; + + let (opcode, vec_size, size) = if opcode == 0b11011 { + if U == 0 && size == 0b11 { + (Opcode::ADDP, SIMDSizeCode::Q, SIMDSizeCode::D) + } else { + return Err(DecodeError::InvalidOpcode); + } + } else { + let (vec_size, el_size) = if U == 0 { + (SIMDSizeCode::S, SIMDSizeCode::H) + } else if size & 0b01 == 0 { + (SIMDSizeCode::D, SIMDSizeCode::S) + } else { + (SIMDSizeCode::Q, SIMDSizeCode::D) + }; + + let opcode = match opcode | ((size & 0b10) << 5) { + 0b001100 => Opcode::FMAXNMP, + 0b001101 => Opcode::FADDP, + 0b001111 => Opcode::FMAXP, + 0b101100 => Opcode::FMINNMP, + 0b101111 => Opcode::FMINP, + _ => { + return Err(DecodeError::InvalidOpcode); + } + }; + + (opcode, vec_size, el_size) + }; + + inst.opcode = opcode; + + inst.operands = [ + Operand::SIMDRegister(size, Rd as u16), + Operand::SIMDRegisterElements(vec_size, Rn as u16, size), + Operand::Nothing, + Operand::Nothing, + ]; } else if op2 == 0b1111 { // `Advanced SIMD scalar two-register miscellaneous FP16` let opcode = (word >> 12) & 0b11111; |