diff --git a/ptx/src/ast.rs b/ptx/src/ast.rs
index 70550b2..6304aac 100644
--- a/ptx/src/ast.rs
+++ b/ptx/src/ast.rs
@@ -105,7 +105,7 @@ impl Default for ScalarType {
 pub enum Statement<'a> {
     Label(&'a str),
     Variable(Variable<'a>),
-    Instruction(Instruction),
+    Instruction(Option<PredAt<'a>>, Instruction<'a>),
 }
 
 pub struct Variable<'a> {
@@ -124,16 +124,95 @@ pub enum StateSpace {
     Shared,
 }
 
-pub enum Instruction {
-    Ld,
-    Mov,
-    Mul,
-    Add,
-    Setp,
-    Not,
-    Bra,
-    Cvt,
-    Shl,
-    At,
-    Ret,
+pub struct PredAt<'a> {
+    pub not: bool,
+    pub label: &'a str,
 }
+
+pub enum Instruction<'a> {
+    Ld(LdData, Arg2<'a>),
+    Mov(MovData, Arg2Mov<'a>),
+    Mul(MulData, Arg3<'a>),
+    Add(AddData, Arg3<'a>),
+    Setp(SetpData, Arg4<'a>),
+    SetpBool(SetpBoolData, Arg5<'a>),
+    Not(NotData, Arg2<'a>),
+    Bra(BraData, Arg1<'a>),
+    Cvt(CvtData, Arg2<'a>),
+    Shl(ShlData, Arg3<'a>),
+    St(StData, Arg2<'a>),
+    At(AtData, Arg1<'a>),
+    Ret(RetData),
+}
+
+pub struct Arg1<'a> {
+    pub dst: &'a str,
+}
+
+pub struct Arg2<'a> {
+    pub dst: &'a str,
+    pub src: Operand<'a>,
+}
+
+pub struct Arg2Mov<'a> {
+    pub dst: &'a str,
+    pub src: MovOperand<'a>,
+}
+
+pub struct Arg3<'a> {
+    pub dst: &'a str,
+    pub src1: Operand<'a>,
+    pub src2: Operand<'a>,
+}
+
+pub struct Arg4<'a> {
+    pub dst1: &'a str,
+    pub dst2: Option<&'a str>,
+    pub src1: Operand<'a>,
+    pub src2: Operand<'a>,
+}
+
+pub struct Arg5<'a> {
+    pub dst1: &'a str,
+    pub dst2: Option<&'a str>,
+    pub src1: Operand<'a>,
+    pub src2: Operand<'a>,
+    pub src3: Operand<'a>,
+}
+
+pub enum Operand<'a> {
+    Reg(&'a str),
+    RegOffset(&'a str, i32),
+    Imm(i128),
+}
+
+pub enum MovOperand<'a> {
+    Op(Operand<'a>),
+    Vec(&'a str, &'a str),
+}
+
+pub struct LdData {}
+
+pub struct MovData {}
+
+pub struct MulData {}
+
+pub struct AddData {}
+
+pub struct SetpData {}
+
+pub struct SetpBoolData {}
+
+pub struct NotData {}
+
+pub struct BraData {}
+
+pub struct CvtData {}
+
+pub struct ShlData {}
+
+pub struct StData {}
+
+pub struct AtData {}
+
+pub struct RetData {}
diff --git a/ptx/src/ptx.lalrpop b/ptx/src/ptx.lalrpop
index 3ff5d9c..b051b79 100644
--- a/ptx/src/ptx.lalrpop
+++ b/ptx/src/ptx.lalrpop
@@ -139,7 +139,7 @@ Statement: Option<ast::Statement<'input>> = {
     <l:Label> => Some(ast::Statement::Label(l)),
     DebugDirective => None,
     <v:Variable> ";" => Some(ast::Statement::Variable(v)),
-    <i:Instruction> ";" => Some(ast::Statement::Instruction(i))
+    <p:PredAt?> <i:Instruction> ";" => Some(ast::Statement::Instruction(p, i))
 };
 
 DebugDirective: () = {
@@ -175,7 +175,7 @@ VariableName: (&'input str, Option<u32>) = {
     }
 };
 
-Instruction = {
+Instruction: ast::Instruction<'input> = {
     InstLd,
     InstMov,
     InstMul,
@@ -190,8 +190,10 @@ Instruction = {
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#data-movement-and-conversion-instructions-ld
-InstLd: ast::Instruction = {
-    "ld" LdQualifier? LdStateSpace? LdCacheOperator? Vector? BaseType ID "," "[" ID "]" => ast::Instruction::Ld
+InstLd: ast::Instruction<'input> = {
+    "ld" LdQualifier? LdStateSpace? LdCacheOperator? Vector? BaseType <dst:ID> "," "[" <src:Operand> "]" => {
+        ast::Instruction::Ld(ast::LdData{}, ast::Arg2{dst:dst, src:src})
+    }
 };
 
 LdQualifier: () = {
@@ -222,8 +224,10 @@ LdCacheOperator = {
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#data-movement-and-conversion-instructions-mov
-InstMov: ast::Instruction = {
-    "mov" MovType ID "," Operand => ast::Instruction::Mov
+InstMov: ast::Instruction<'input> = {
+    "mov" MovType <a:Arg2Mov> => {
+        ast::Instruction::Mov(ast::MovData{}, a)
+    }
 };
 
 MovType = {
@@ -237,12 +241,16 @@ MovType = {
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#integer-arithmetic-instructions-mul
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#floating-point-instructions-mul
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#half-precision-floating-point-instructions-mul
-InstMul: ast::Instruction = {
-    "mul" MulIntControl? IntType ID "," Operand "," Operand  => ast::Instruction::Mul,
-    "mul" RoundingMode? ".ftz"? ".sat"? ".f32" ID "," Operand "," Operand => ast::Instruction::Mul,
-    "mul" RoundingMode? ".f64" ID "," Operand "," Operand => ast::Instruction::Mul,
-    "mul" ".rn"? ".ftz"? ".sat"? ".f16" ID "," Operand "," Operand => ast::Instruction::Mul,
-    "mul" ".rn"? ".ftz"? ".sat"? ".f16x2" ID "," Operand "," Operand => ast::Instruction::Mul,
+InstMul: ast::Instruction<'input> = {
+    "mul" <d:InstMulMode> <a:Arg3> => ast::Instruction::Mul(d, a)
+};
+
+InstMulMode: ast::MulData = {
+    MulIntControl? IntType => ast::MulData{},
+    RoundingMode? ".ftz"? ".sat"? ".f32" => ast::MulData{},
+    RoundingMode? ".f64" => ast::MulData{},
+    ".rn"? ".ftz"? ".sat"? ".f16" => ast::MulData{},
+    ".rn"? ".ftz"? ".sat"? ".f16x2" => ast::MulData{}
 };
 
 MulIntControl = {
@@ -262,19 +270,33 @@ IntType = {
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#integer-arithmetic-instructions-add
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#floating-point-instructions-add
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#half-precision-floating-point-instructions-add
-InstAdd: ast::Instruction = {
-    "add" IntType ID "," Operand "," Operand => ast::Instruction::Add,
-    "add" ".sat" ".s32" ID "," Operand "," Operand => ast::Instruction::Add,
-    "add" RoundingMode? ".ftz"? ".sat"? ".f32" ID "," Operand "," Operand => ast::Instruction::Add,
-    "add" RoundingMode? ".f64" ID "," Operand "," Operand => ast::Instruction::Add,
-    "add" ".rn"? ".ftz"? ".sat"? ".f16" ID "," Operand "," Operand => ast::Instruction::Add,
-    "add" ".rn"? ".ftz"? ".sat"? ".f16x2" ID "," Operand "," Operand => ast::Instruction::Add,
+InstAdd: ast::Instruction<'input> = {
+    "add" <d:InstAddMode> <a:Arg3> => ast::Instruction::Add(d, a)
+};
+
+InstAddMode: ast::AddData = {
+    IntType => ast::AddData{},
+    ".sat" ".s32" => ast::AddData{},
+    RoundingMode? ".ftz"? ".sat"? ".f32" => ast::AddData{},
+    RoundingMode? ".f64" => ast::AddData{},
+    ".rn"? ".ftz"? ".sat"? ".f16" => ast::AddData{},
+    ".rn"? ".ftz"? ".sat"? ".f16x2" => ast::AddData{}
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#comparison-and-selection-instructions-setp
-InstSetp: ast::Instruction = {
-    "setp" SetpCmpOp ".ftz"? SetpType ID ("|" ID)? "," Operand "," Operand => ast::Instruction::Setp,
-    "setp" SetpCmpOp SetpBoolOp ".ftz"? SetpType ID ("|" ID)? "," Operand "," Operand "," "!"? ID => ast::Instruction::Setp
+// https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#half-precision-comparison-instructions-setp
+// TODO: support f16 setp
+InstSetp: ast::Instruction<'input> = {
+    "setp" <d:SetpMode> <a:Arg4> => ast::Instruction::Setp(d, a),
+    "setp" <d:SetpBoolMode> <a:Arg5> => ast::Instruction::SetpBool(d, a),
+};
+
+SetpMode: ast::SetpData = {
+    SetpCmpOp ".ftz"? SetpType => ast::SetpData{}
+};
+
+SetpBoolMode: ast::SetpBoolData = {
+    SetpCmpOp SetpBoolOp ".ftz"? SetpType => ast::SetpBoolData{}
 };
 
 SetpCmpOp = {
@@ -294,8 +316,8 @@ SetpType = {
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#logic-and-shift-instructions-not
-InstNot: ast::Instruction = {
-    "not" NotType ID "," Operand => ast::Instruction::Not
+InstNot: ast::Instruction<'input> = {
+    "not" NotType <a:Arg2> => ast::Instruction::Not(ast::NotData{}, a)
 };
 
 NotType = {
@@ -303,18 +325,21 @@ NotType = {
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#control-flow-instructions-at
-InstAt: ast::Instruction = {
-    "@" "!"? ID => ast::Instruction::At
+PredAt: ast::PredAt<'input> = {
+    "@" <label:ID> => ast::PredAt { not: false, label:label },
+    "@" "!" <label:ID> => ast::PredAt { not: true, label:label }
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#control-flow-instructions-bra
-InstBra: ast::Instruction = {
-    InstAt? "bra" ".uni"? ID => ast::Instruction::Bra
+InstBra: ast::Instruction<'input> = {
+    "bra" ".uni"? <a:Arg1> => ast::Instruction::Bra(ast::BraData{}, a)
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#data-movement-and-conversion-instructions-cvt
-InstCvt: ast::Instruction = {
-    "cvt" CvtRnd? ".ftz"? ".sat"? CvtType CvtType ID "," Operand => ast::Instruction::Cvt
+InstCvt: ast::Instruction<'input> = {
+    "cvt" CvtRnd? ".ftz"? ".sat"? CvtType CvtType <a:Arg2> => {
+        ast::Instruction::Cvt(ast::CvtData{}, a)
+    }
 };
 
 CvtRnd = {
@@ -337,8 +362,8 @@ CvtType = {
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#logic-and-shift-instructions-shl
-InstShl: ast::Instruction = {
-    "shl" ShlType ID "," Operand "," Operand => ast::Instruction::Shl
+InstShl: ast::Instruction<'input> = {
+    "shl" ShlType <a:Arg3> => ast::Instruction::Shl(ast::ShlData{}, a)
 };
 
 ShlType = {
@@ -346,8 +371,10 @@ ShlType = {
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#data-movement-and-conversion-instructions-st
-InstSt: ast::Instruction = {
-    "st" LdQualifier? StStateSpace? StCacheOperator? Vector? BaseType "[" ID "]" "," Operand => ast::Instruction::Shl
+InstSt: ast::Instruction<'input> = {
+    "st" LdQualifier? StStateSpace? StCacheOperator? Vector? BaseType "[" <dst:ID> "]" "," <src:Operand> => {
+        ast::Instruction::St(ast::StData{}, ast::Arg2{dst:dst, src:src})
+    }
 };
 
 StStateSpace = {
@@ -365,31 +392,66 @@ StCacheOperator = {
 };
 
 // https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#control-flow-instructions-ret
-InstRet: ast::Instruction = {
-    "ret" ".uni"? => ast::Instruction::Ret
+InstRet: ast::Instruction<'input> = {
+    "ret" ".uni"? => ast::Instruction::Ret(ast::RetData{})
 };
 
-Operand: () = {
-    ID,
-    Num,
-    OffsetOperand,
-    ArrayOperand,
-    VectorOperand,
+Operand: ast::Operand<'input> = {
+    <r:ID> => ast::Operand::Reg(r),
+    <r:ID> "+" <o:Num> => {
+        let offset = o.parse::<i32>();
+        let offset = offset.unwrap_with(errors);
+        ast::Operand::RegOffset(r, offset)
+    },
+    <o:Num> => {
+        let offset = o.parse::<i128>();
+        let offset = offset.unwrap_with(errors);
+        ast::Operand::Imm(offset)
+    }
 };
 
-OffsetOperand = {
-    ID "+" Num,
+MovOperand: ast::MovOperand<'input> = {
+    <o:Operand> => ast::MovOperand::Op(o),
+    <o:VectorOperand> => {
+        let (pref, suf) = o;
+        ast::MovOperand::Vec(pref, suf)
+    }
 };
 
-ArrayOperand = {
-    ID "[" Num "]",
+VectorOperand: (&'input str, &'input str) = {
+    <pref:ID> "." <suf:ID> => (pref, suf),
+    <pref:ID> <suf:DotID> => (pref, &suf[1..]),
 };
 
-VectorOperand: () = {
-    ID "." ID,
-    ID DotID,
+Arg1: ast::Arg1<'input> = {
+    <dst:ID> => ast::Arg1{<>}
 };
 
+Arg2: ast::Arg2<'input> = {
+    <dst:ID> "," <src:Operand> => ast::Arg2{<>}
+};
+
+Arg2Mov: ast::Arg2Mov<'input> = {
+    <dst:ID> "," <src:MovOperand> => ast::Arg2Mov{<>}
+};
+
+Arg3: ast::Arg3<'input> = {
+    <dst:ID> "," <src1:Operand> "," <src2:Operand> => ast::Arg3{<>}
+};
+
+Arg4: ast::Arg4<'input> = {
+    <dst1:ID> <dst2:OptionalDst?> "," <src1:Operand> "," <src2:Operand> => ast::Arg4{<>}
+};
+
+// TODO: pass src3 negation somewhere
+Arg5: ast::Arg5<'input> = {
+    <dst1:ID> <dst2:OptionalDst?> "," <src1:Operand> "," <src2:Operand> "," "!"? <src3:Operand> => ast::Arg5{<>}
+};
+
+OptionalDst: &'input str = {
+    "|" <dst2:ID> => dst2
+}
+
 Vector = {
     ".v2",
     ".v4"
diff --git a/ptx/src/test/mod.rs b/ptx/src/test/mod.rs
index 1de55bb..e12097a 100644
--- a/ptx/src/test/mod.rs
+++ b/ptx/src/test/mod.rs
@@ -12,7 +12,13 @@ fn empty() {
 }
 
 #[test]
-fn vector_add() {
+fn vectorAdd_kernel64_ptx() {
     let vector_add = include_str!("vectorAdd_kernel64.ptx");
     parse_and_assert(vector_add);
 }
+
+#[test]
+fn operands_ptx() {
+    let vector_add = include_str!("operands.ptx");
+    parse_and_assert(vector_add);
+}
diff --git a/ptx/src/test/operands.ptx b/ptx/src/test/operands.ptx
new file mode 100644
index 0000000..67c59f5
--- /dev/null
+++ b/ptx/src/test/operands.ptx
@@ -0,0 +1,33 @@
+.version 6.5
+.target sm_30
+.address_size 64
+
+.visible .entry foobar(
+	.param .u32 foobar_param_0
+)
+{
+	.reg .u32 	%reg<10>;
+	.reg .u64 	%reg_64;
+    .reg .pred  p;
+    .reg .pred  q;
+
+    // reg
+	ld.param.u32 	%reg0, [foobar_param_0];
+    // reg with offset
+	ld.param.u32 	%reg1, [foobar_param_0+1];
+    ld.param.u32 	%reg2, [foobar_param_0+-1];
+    // immediate - only in local
+    ld.local.u32 	%reg3, [1];
+
+    // ids
+    add.u32 %reg0, %reg1, %reg2;
+    // immediate
+    add.u32 %reg0, 1, %reg2;
+    // reg with offset
+    add.u32 %reg0, %reg1+1, %reg2+-1;
+    // suprisingly, setp accepts all forms
+    setp.eq.and.u32 p, %reg1+1, %reg2+-1, 2;
+
+    // vector index - only supported by mov (maybe: ld, st, tex)
+    mov.u32 %reg0, %ntid.x;
+}
diff --git a/ptx/src/translate.rs b/ptx/src/translate.rs
index f3abaf0..3f7ce9d 100644
--- a/ptx/src/translate.rs
+++ b/ptx/src/translate.rs
@@ -128,10 +128,30 @@ fn emit_function<'a>(
                 builder.begin_block(Some(id))?;
             }
             ast::Statement::Variable(var) => panic!(),
-            ast::Statement::Instruction(i) => panic!(),
+            ast::Statement::Instruction(_,_) => panic!(),
         }
     }
     builder.ret()?;
     builder.end_function()?;
     Ok(())
 }
+
+enum Statement {
+    Label,
+    Instruction(Instruction),
+    Phi(Vec<spirv::Word>)
+}
+
+enum Instruction {
+    Ld,
+    Mov,
+    Mul,
+    Add,
+    Setp,
+    Not,
+    Bra,
+    Cvt,
+    Shl,
+    At,
+    Ret,
+}
\ No newline at end of file