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frontend: Add support for numeric constants.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,235 @@ | ||
| use crate::{ | ||
| prelude::{ | ||
| CubeContext, CubePrimitive, ExpandElementTyped, UInt, BF16, F16, F32, F64, I32, I64, | ||
| }, | ||
| unexpanded, | ||
| }; | ||
|
|
||
| use half::{bf16, f16}; | ||
| use paste::paste; | ||
|
|
||
| macro_rules! tt_as_expr { | ||
| ($t:expr) => { | ||
| $t | ||
| }; | ||
| } | ||
|
|
||
| macro_rules! tt_as_ty { | ||
| (( $t:ty )) => { | ||
| $t | ||
| }; | ||
| ([ $t:ty ]) => { | ||
| $t | ||
| }; | ||
| ({ $t:ty }) => { | ||
| $t | ||
| }; | ||
| ($t:ty) => { | ||
| $t | ||
| }; | ||
| } | ||
|
|
||
| macro_rules! impl_op { | ||
| ($tr:ident { $( $name:ident $(-> { $($ret_type:tt)+ } )? ),* } => { $($type:ty | $expr:tt),* }) => { | ||
| paste! { | ||
| impl_op!(@default | ||
| [], | ||
| $tr, | ||
| { $({ $name, [<lim_ $name:lower>], [<__expand_lim_ $name:lower>], $( { $($ret_type)+ } )? })* }, | ||
| { $($type, $expr);* } | ||
| ); | ||
| } | ||
| }; | ||
|
|
||
| // Default $ret_type to {Self} | ||
| (@default [$($acc:tt)*], $tr:ident, {}, $types:tt) => { | ||
| impl_op!(@internal | ||
| $tr, | ||
| { $($acc);* }, | ||
| $types | ||
| ); | ||
| }; | ||
| (@default [$($acc:tt)*], $tr:ident, { { $name:ident, $unexpand_name:ident, $expand_name:ident, } $($tail:tt)* }, $types:tt) => { | ||
| impl_op!(@default | ||
| [ $($acc)* { $name, $unexpand_name, $expand_name, {Self} } ], | ||
| $tr, | ||
| { $($tail)* }, | ||
| $types | ||
| ); | ||
| }; | ||
| (@default [$($acc:tt)*], $tr:ident, { { $name:ident, $unexpand_name:ident, $expand_name:ident, $ret_type:tt } $($tail:tt)* }, $types:tt) => { | ||
| impl_op!(@default | ||
| [ $($acc)* { $name, $unexpand_name, $expand_name, $ret_type } ], | ||
| $tr, | ||
| { $($tail)* }, | ||
| $types | ||
| ); | ||
| }; | ||
|
|
||
| // Generate trait declarations and impl blocks | ||
| (@internal $tr:ident, $values:tt, $types:tt) => { | ||
| impl_op!(@decls $tr, $values); | ||
| impl_op!(@impls $tr, $types, $values); | ||
| }; | ||
|
|
||
| // Generate trait declarations | ||
| (@decls $tr:ident, { $({ $name:ident, $unexpand_name:ident, $expand_name:ident, { $ret_type:ty } });* }) => { | ||
| pub trait $tr: CubePrimitive + Sized { | ||
| $( | ||
| fn $unexpand_name() -> $ret_type { | ||
| unexpanded!() | ||
| } | ||
| fn $expand_name(_context: &mut CubeContext) -> ExpandElementTyped<$ret_type>; | ||
| )* | ||
| } | ||
| }; | ||
|
|
||
| // Generate impl blocks | ||
| (@impls $tr:ident, { $($type:ty, $e:tt);* }, $values:tt) => { | ||
| $( | ||
| impl $tr for $type { | ||
| impl_op!(@impl $e, $values); | ||
| } | ||
| )* | ||
| }; | ||
|
|
||
| // Generate impl block contents | ||
| (@impl $e:tt, { $({ $name:ident, $unexpand_name:ident, $expand_name:ident, $ret_type:tt });* }) => { | ||
| $( | ||
| fn $expand_name(_context: &mut CubeContext) -> ExpandElementTyped<tt_as_ty!($ret_type)> { | ||
| impl_op!(@implbody $e, $name, $ret_type) | ||
| } | ||
| )* | ||
| }; | ||
|
|
||
| (@implbody { $({ $($select_type:tt)+ } => $e:tt),+; $default_e:tt }, $name:ident, $ret_type:tt) => { | ||
| impl_op!(@implbody $({ { $($select_type)+ }, $e }),+; $default_e, $name, $ret_type) | ||
| }; | ||
|
|
||
| (@implbody { $select_type:tt, $e:tt } $(, $acc:tt)*; $default_e:tt, $name:ident, $ret_type:tt) => {{ | ||
| macro_rules! __emit_on_match { | ||
| ($select_type, $select_type) => { impl_op!(@implbody $e, $name, { $ret_type }) }; | ||
| ($select_type, $ret_type) => { impl_op!(@implbody $($acc),*; $default_e, $name, $ret_type) }; | ||
| } | ||
|
|
||
| __emit_on_match!($select_type, $ret_type) | ||
| }}; | ||
|
|
||
| (@implbody ; $default_e:tt, $name:ident, $($unused:tt)*) => { | ||
| impl_op!(@implbody $default_e, $name,) | ||
| }; | ||
|
|
||
| (@implbody ( $($e:tt)* ), $name:ident, $($unused:tt)*) => { | ||
| ExpandElementTyped::from_lit(tt_as_expr!(impl_op!(@subst $name, [], $($e)*))) | ||
| }; | ||
|
|
||
| // Handle @name substitution | ||
|
|
||
| // No more tokens to process, return the token tree | ||
| (@subst $name:ident, [$($acc:tt)*],) => { | ||
| $($acc)* | ||
| }; | ||
|
|
||
| // Handle replacement | ||
| (@subst $name:ident, [$($acc:tt)*], @name $($tail:tt)*) => { | ||
| impl_op!(@subst $name, | ||
| [ $($acc)* $name ], | ||
| $($tail)* | ||
| ) | ||
| }; | ||
|
|
||
| // Handle empty token trees | ||
| (@subst $name:ident, [$($acc:tt)*], () $($tail:tt)*) => { | ||
| impl_op!(@subst $name, | ||
| [ $($acc)* () ], | ||
| $($tail)* | ||
| ) | ||
| }; | ||
| (@subst $name:ident, [$($acc:tt)*], [] $($tail:tt)*) => { | ||
| impl_op!(@subst $name, | ||
| [ $($acc)* [] ], | ||
| $($tail)* | ||
| ) | ||
| }; | ||
| (@subst $name:ident, [$($acc:tt)*], {} $($tail:tt)*) => { | ||
| impl_op!(@subst $name, | ||
| [ $($acc)* {} ], | ||
| $($tail)* | ||
| ) | ||
| }; | ||
|
|
||
| // Handle token trees | ||
| (@subst $name:ident, [$($acc:tt)*], ( $($head:tt)* ) $($tail:tt)*) => { | ||
| impl_op!(@subst $name, | ||
| [ $($acc)* ( impl_op!(@subst $name, [], $($head)*) ) ], | ||
| $($tail)* | ||
| ) | ||
| }; | ||
| (@subst $name:ident, [$($acc:tt)*], [ $($head:tt)* ] $($tail:tt)*) => { | ||
| impl_op!(@subst $name, | ||
| [ $($acc)* [ impl_op!(@subst $name, [], $($head)*) ] ], | ||
| $($tail)* | ||
| ) | ||
| }; | ||
| (@subst $name:ident, [$($acc:tt)*], { $($head:tt)* } $($tail:tt)*) => { | ||
| impl_op!(@subst $name, | ||
| [ $($acc)* { impl_op!(@subst $name, [], $($head)*) } ], | ||
| $($tail)* | ||
| ) | ||
| }; | ||
|
|
||
| // Handle lone tokens | ||
| (@subst $name:ident, [$($acc:tt)*], $head:tt $($tail:tt)*) => { | ||
| impl_op!(@subst $name, | ||
| [ $($acc)* $head ], | ||
| $($tail)* | ||
| ) | ||
| }; | ||
| } | ||
|
|
||
| impl_op!( | ||
| NumConstants { | ||
| MAX, | ||
| MIN | ||
| } => { | ||
| BF16 | (bf16::@name.to_f32()), | ||
| F16 | (f16::@name.to_f32()), | ||
| F32 | (f32::@name), | ||
| F64 | (f64::@name), | ||
| I32 | (i32::@name), | ||
| I64 | (i64::@name), | ||
| UInt | (u32::@name) | ||
| } | ||
| ); | ||
|
|
||
| impl_op!( | ||
| FloatConstants { | ||
| DIGITS -> {UInt}, | ||
| EPSILON, | ||
| INFINITY, | ||
| MANTISSA_DIGITS -> {UInt}, | ||
| MAX_10_EXP -> {I32}, | ||
| MAX_EXP -> {I32}, | ||
| MIN_10_EXP -> {I32}, | ||
| MIN_EXP -> {I32}, | ||
| MIN_POSITIVE, | ||
| NAN, | ||
| NEG_INFINITY, | ||
| RADIX -> {UInt} | ||
| } => { | ||
| BF16 | {{Self} => (bf16::@name.to_f32()); (bf16::@name)}, | ||
| F16 | {{Self} => (f16::@name.to_f32()); (f16::@name)}, | ||
| F32 | (f32::@name), | ||
| F64 | (f64::@name) | ||
| } | ||
| ); | ||
|
|
||
| impl_op!( | ||
| IntConstants { | ||
| BITS -> {UInt} | ||
| } => { | ||
| I32 | (i32::@name), | ||
| I64 | (i64::@name), | ||
| UInt | (u32::@name) | ||
| } | ||
| ); |
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