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instructions.rs
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instructions.rs
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#![allow(non_snake_case)]
use crate::cdsl::instructions::{
AllInstructions, InstructionBuilder as Inst, InstructionGroupBuilder,
};
use crate::cdsl::operands::Operand;
use crate::cdsl::types::{LaneType, ValueType};
use crate::cdsl::typevar::{Interval, TypeSetBuilder, TypeVar};
use crate::shared::formats::Formats;
use crate::shared::types;
use crate::shared::{entities::EntityRefs, immediates::Immediates};
#[inline(never)]
fn define_control_flow(
ig: &mut InstructionGroupBuilder,
formats: &Formats,
imm: &Immediates,
entities: &EntityRefs,
) {
let block = &Operand::new("block", &entities.block).with_doc("Destination basic block");
let args = &Operand::new("args", &entities.varargs).with_doc("block arguments");
ig.push(
Inst::new(
"jump",
r#"
Jump.
Unconditionally jump to a basic block, passing the specified
block arguments. The number and types of arguments must match the
destination block.
"#,
&formats.jump,
)
.operands_in(vec![block, args])
.is_terminator(true)
.is_branch(true),
);
let Testable = &TypeVar::new(
"Testable",
"A scalar boolean or integer type",
TypeSetBuilder::new()
.ints(Interval::All)
.bools(Interval::All)
.build(),
);
{
let c = &Operand::new("c", Testable).with_doc("Controlling value to test");
ig.push(
Inst::new(
"brz",
r#"
Branch when zero.
If ``c`` is a `b1` value, take the branch when ``c`` is false. If
``c`` is an integer value, take the branch when ``c = 0``.
"#,
&formats.branch,
)
.operands_in(vec![c, block, args])
.is_branch(true),
);
ig.push(
Inst::new(
"brnz",
r#"
Branch when non-zero.
If ``c`` is a `b1` value, take the branch when ``c`` is true. If
``c`` is an integer value, take the branch when ``c != 0``.
"#,
&formats.branch,
)
.operands_in(vec![c, block, args])
.is_branch(true),
);
}
let iB = &TypeVar::new(
"iB",
"A scalar integer type",
TypeSetBuilder::new().ints(Interval::All).build(),
);
let iflags: &TypeVar = &ValueType::Special(types::Flag::IFlags.into()).into();
let fflags: &TypeVar = &ValueType::Special(types::Flag::FFlags.into()).into();
{
let Cond = &Operand::new("Cond", &imm.intcc);
let x = &Operand::new("x", iB);
let y = &Operand::new("y", iB);
ig.push(
Inst::new(
"br_icmp",
r#"
Compare scalar integers and branch.
Compare ``x`` and ``y`` in the same way as the `icmp` instruction
and take the branch if the condition is true:
```text
br_icmp ugt v1, v2, block4(v5, v6)
```
is semantically equivalent to:
```text
v10 = icmp ugt, v1, v2
brnz v10, block4(v5, v6)
```
Some RISC architectures like MIPS and RISC-V provide instructions that
implement all or some of the condition codes. The instruction can also
be used to represent *macro-op fusion* on architectures like Intel's.
"#,
&formats.branch_icmp,
)
.operands_in(vec![Cond, x, y, block, args])
.is_branch(true),
);
let f = &Operand::new("f", iflags);
ig.push(
Inst::new(
"brif",
r#"
Branch when condition is true in integer CPU flags.
"#,
&formats.branch_int,
)
.operands_in(vec![Cond, f, block, args])
.is_branch(true),
);
}
{
let Cond = &Operand::new("Cond", &imm.floatcc);
let f = &Operand::new("f", fflags);
ig.push(
Inst::new(
"brff",
r#"
Branch when condition is true in floating point CPU flags.
"#,
&formats.branch_float,
)
.operands_in(vec![Cond, f, block, args])
.is_branch(true),
);
}
{
let _i32 = &TypeVar::new(
"i32",
"A 32 bit scalar integer type",
TypeSetBuilder::new().ints(32..32).build(),
);
let x = &Operand::new("x", _i32).with_doc("i32 index into jump table");
let JT = &Operand::new("JT", &entities.jump_table);
ig.push(
Inst::new(
"br_table",
r#"
Indirect branch via jump table.
Use ``x`` as an unsigned index into the jump table ``JT``. If a jump
table entry is found, branch to the corresponding block. If no entry was
found or the index is out-of-bounds, branch to the given default block.
Note that this branch instruction can't pass arguments to the targeted
blocks. Split critical edges as needed to work around this.
Do not confuse this with "tables" in WebAssembly. ``br_table`` is for
jump tables with destinations within the current function only -- think
of a ``match`` in Rust or a ``switch`` in C. If you want to call a
function in a dynamic library, that will typically use
``call_indirect``.
"#,
&formats.branch_table,
)
.operands_in(vec![x, block, JT])
.is_terminator(true)
.is_branch(true),
);
}
let iAddr = &TypeVar::new(
"iAddr",
"An integer address type",
TypeSetBuilder::new().ints(32..64).refs(32..64).build(),
);
ig.push(
Inst::new(
"debugtrap",
r#"
Encodes an assembly debug trap.
"#,
&formats.nullary,
)
.other_side_effects(true)
.can_load(true)
.can_store(true),
);
{
let code = &Operand::new("code", &imm.trapcode);
ig.push(
Inst::new(
"trap",
r#"
Terminate execution unconditionally.
"#,
&formats.trap,
)
.operands_in(vec![code])
.can_trap(true)
.is_terminator(true),
);
let c = &Operand::new("c", Testable).with_doc("Controlling value to test");
ig.push(
Inst::new(
"trapz",
r#"
Trap when zero.
if ``c`` is non-zero, execution continues at the following instruction.
"#,
&formats.cond_trap,
)
.operands_in(vec![c, code])
.can_trap(true),
);
ig.push(
Inst::new(
"resumable_trap",
r#"
A resumable trap.
This instruction allows non-conditional traps to be used as non-terminal instructions.
"#,
&formats.trap,
)
.operands_in(vec![code])
.can_trap(true),
);
let c = &Operand::new("c", Testable).with_doc("Controlling value to test");
ig.push(
Inst::new(
"trapnz",
r#"
Trap when non-zero.
If ``c`` is zero, execution continues at the following instruction.
"#,
&formats.cond_trap,
)
.operands_in(vec![c, code])
.can_trap(true),
);
ig.push(
Inst::new(
"resumable_trapnz",
r#"
A resumable trap to be called when the passed condition is non-zero.
If ``c`` is zero, execution continues at the following instruction.
"#,
&formats.cond_trap,
)
.operands_in(vec![c, code])
.can_trap(true),
);
let Cond = &Operand::new("Cond", &imm.intcc);
let f = &Operand::new("f", iflags);
ig.push(
Inst::new(
"trapif",
r#"
Trap when condition is true in integer CPU flags.
"#,
&formats.int_cond_trap,
)
.operands_in(vec![Cond, f, code])
.can_trap(true),
);
let Cond = &Operand::new("Cond", &imm.floatcc);
let f = &Operand::new("f", fflags);
let code = &Operand::new("code", &imm.trapcode);
ig.push(
Inst::new(
"trapff",
r#"
Trap when condition is true in floating point CPU flags.
"#,
&formats.float_cond_trap,
)
.operands_in(vec![Cond, f, code])
.can_trap(true),
);
}
let rvals = &Operand::new("rvals", &entities.varargs).with_doc("return values");
ig.push(
Inst::new(
"return",
r#"
Return from the function.
Unconditionally transfer control to the calling function, passing the
provided return values. The list of return values must match the
function signature's return types.
"#,
&formats.multiary,
)
.operands_in(vec![rvals])
.is_return(true)
.is_terminator(true),
);
let FN = &Operand::new("FN", &entities.func_ref)
.with_doc("function to call, declared by `function`");
let args = &Operand::new("args", &entities.varargs).with_doc("call arguments");
let rvals = &Operand::new("rvals", &entities.varargs).with_doc("return values");
ig.push(
Inst::new(
"call",
r#"
Direct function call.
Call a function which has been declared in the preamble. The argument
types must match the function's signature.
"#,
&formats.call,
)
.operands_in(vec![FN, args])
.operands_out(vec![rvals])
.is_call(true),
);
let SIG = &Operand::new("SIG", &entities.sig_ref).with_doc("function signature");
let callee = &Operand::new("callee", iAddr).with_doc("address of function to call");
let args = &Operand::new("args", &entities.varargs).with_doc("call arguments");
let rvals = &Operand::new("rvals", &entities.varargs).with_doc("return values");
ig.push(
Inst::new(
"call_indirect",
r#"
Indirect function call.
Call the function pointed to by `callee` with the given arguments. The
called function must match the specified signature.
Note that this is different from WebAssembly's ``call_indirect``; the
callee is a native address, rather than a table index. For WebAssembly,
`table_addr` and `load` are used to obtain a native address
from a table.
"#,
&formats.call_indirect,
)
.operands_in(vec![SIG, callee, args])
.operands_out(vec![rvals])
.is_call(true),
);
let FN = &Operand::new("FN", &entities.func_ref)
.with_doc("function to call, declared by `function`");
let addr = &Operand::new("addr", iAddr);
ig.push(
Inst::new(
"func_addr",
r#"
Get the address of a function.
Compute the absolute address of a function declared in the preamble.
The returned address can be used as a ``callee`` argument to
`call_indirect`. This is also a method for calling functions that
are too far away to be addressable by a direct `call`
instruction.
"#,
&formats.func_addr,
)
.operands_in(vec![FN])
.operands_out(vec![addr]),
);
}
#[inline(never)]
fn define_simd_lane_access(
ig: &mut InstructionGroupBuilder,
formats: &Formats,
imm: &Immediates,
_: &EntityRefs,
) {
let TxN = &TypeVar::new(
"TxN",
"A SIMD vector type",
TypeSetBuilder::new()
.ints(Interval::All)
.floats(Interval::All)
.bools(Interval::All)
.simd_lanes(Interval::All)
.dynamic_simd_lanes(Interval::All)
.includes_scalars(false)
.build(),
);
let x = &Operand::new("x", &TxN.lane_of()).with_doc("Value to splat to all lanes");
let a = &Operand::new("a", TxN);
ig.push(
Inst::new(
"splat",
r#"
Vector splat.
Return a vector whose lanes are all ``x``.
"#,
&formats.unary,
)
.operands_in(vec![x])
.operands_out(vec![a]),
);
let I8x16 = &TypeVar::new(
"I8x16",
"A SIMD vector type consisting of 16 lanes of 8-bit integers",
TypeSetBuilder::new()
.ints(8..8)
.simd_lanes(16..16)
.includes_scalars(false)
.build(),
);
let x = &Operand::new("x", I8x16).with_doc("Vector to modify by re-arranging lanes");
let y = &Operand::new("y", I8x16).with_doc("Mask for re-arranging lanes");
ig.push(
Inst::new(
"swizzle",
r#"
Vector swizzle.
Returns a new vector with byte-width lanes selected from the lanes of the first input
vector ``x`` specified in the second input vector ``s``. The indices ``i`` in range
``[0, 15]`` select the ``i``-th element of ``x``. For indices outside of the range the
resulting lane is 0. Note that this operates on byte-width lanes.
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
let x = &Operand::new("x", TxN).with_doc("The vector to modify");
let y = &Operand::new("y", &TxN.lane_of()).with_doc("New lane value");
let Idx = &Operand::new("Idx", &imm.uimm8).with_doc("Lane index");
ig.push(
Inst::new(
"insertlane",
r#"
Insert ``y`` as lane ``Idx`` in x.
The lane index, ``Idx``, is an immediate value, not an SSA value. It
must indicate a valid lane index for the type of ``x``.
"#,
&formats.ternary_imm8,
)
.operands_in(vec![x, y, Idx])
.operands_out(vec![a]),
);
let x = &Operand::new("x", TxN);
let a = &Operand::new("a", &TxN.lane_of());
ig.push(
Inst::new(
"extractlane",
r#"
Extract lane ``Idx`` from ``x``.
The lane index, ``Idx``, is an immediate value, not an SSA value. It
must indicate a valid lane index for the type of ``x``. Note that the upper bits of ``a``
may or may not be zeroed depending on the ISA but the type system should prevent using
``a`` as anything other than the extracted value.
"#,
&formats.binary_imm8,
)
.operands_in(vec![x, Idx])
.operands_out(vec![a]),
);
}
#[inline(never)]
fn define_simd_arithmetic(
ig: &mut InstructionGroupBuilder,
formats: &Formats,
_: &Immediates,
_: &EntityRefs,
) {
let Int = &TypeVar::new(
"Int",
"A scalar or vector integer type",
TypeSetBuilder::new()
.ints(Interval::All)
.simd_lanes(Interval::All)
.build(),
);
let a = &Operand::new("a", Int);
let x = &Operand::new("x", Int);
let y = &Operand::new("y", Int);
ig.push(
Inst::new(
"imin",
r#"
Signed integer minimum.
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
ig.push(
Inst::new(
"umin",
r#"
Unsigned integer minimum.
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
ig.push(
Inst::new(
"imax",
r#"
Signed integer maximum.
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
ig.push(
Inst::new(
"umax",
r#"
Unsigned integer maximum.
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
let IxN = &TypeVar::new(
"IxN",
"A SIMD vector type containing integers",
TypeSetBuilder::new()
.ints(Interval::All)
.simd_lanes(Interval::All)
.includes_scalars(false)
.build(),
);
let a = &Operand::new("a", IxN);
let x = &Operand::new("x", IxN);
let y = &Operand::new("y", IxN);
ig.push(
Inst::new(
"avg_round",
r#"
Unsigned average with rounding: `a := (x + y + 1) // 2`
The addition does not lose any information (such as from overflow).
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
ig.push(
Inst::new(
"uadd_sat",
r#"
Add with unsigned saturation.
This is similar to `iadd` but the operands are interpreted as unsigned integers and their
summed result, instead of wrapping, will be saturated to the highest unsigned integer for
the controlling type (e.g. `0xFF` for i8).
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
ig.push(
Inst::new(
"sadd_sat",
r#"
Add with signed saturation.
This is similar to `iadd` but the operands are interpreted as signed integers and their
summed result, instead of wrapping, will be saturated to the lowest or highest
signed integer for the controlling type (e.g. `0x80` or `0x7F` for i8). For example,
since an `sadd_sat.i8` of `0x70` and `0x70` is greater than `0x7F`, the result will be
clamped to `0x7F`.
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
ig.push(
Inst::new(
"usub_sat",
r#"
Subtract with unsigned saturation.
This is similar to `isub` but the operands are interpreted as unsigned integers and their
difference, instead of wrapping, will be saturated to the lowest unsigned integer for
the controlling type (e.g. `0x00` for i8).
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
ig.push(
Inst::new(
"ssub_sat",
r#"
Subtract with signed saturation.
This is similar to `isub` but the operands are interpreted as signed integers and their
difference, instead of wrapping, will be saturated to the lowest or highest
signed integer for the controlling type (e.g. `0x80` or `0x7F` for i8).
"#,
&formats.binary,
)
.operands_in(vec![x, y])
.operands_out(vec![a]),
);
}
#[allow(clippy::many_single_char_names)]
pub(crate) fn define(
all_instructions: &mut AllInstructions,
formats: &Formats,
imm: &Immediates,
entities: &EntityRefs,
) {
let mut ig = InstructionGroupBuilder::new(all_instructions);
define_control_flow(&mut ig, formats, imm, entities);
define_simd_lane_access(&mut ig, formats, imm, entities);
define_simd_arithmetic(&mut ig, formats, imm, entities);
// Operand kind shorthands.
let iflags: &TypeVar = &ValueType::Special(types::Flag::IFlags.into()).into();
let fflags: &TypeVar = &ValueType::Special(types::Flag::FFlags.into()).into();
let b1: &TypeVar = &ValueType::from(LaneType::from(types::Bool::B1)).into();
let f32_: &TypeVar = &ValueType::from(LaneType::from(types::Float::F32)).into();
let f64_: &TypeVar = &ValueType::from(LaneType::from(types::Float::F64)).into();
// Starting definitions.
let Int = &TypeVar::new(
"Int",
"A scalar or vector integer type",
TypeSetBuilder::new()
.ints(Interval::All)
.simd_lanes(Interval::All)
.dynamic_simd_lanes(Interval::All)
.build(),
);
let Bool = &TypeVar::new(
"Bool",
"A scalar or vector boolean type",
TypeSetBuilder::new()
.bools(Interval::All)
.simd_lanes(Interval::All)
.build(),
);
let ScalarBool = &TypeVar::new(
"ScalarBool",
"A scalar boolean type",
TypeSetBuilder::new().bools(Interval::All).build(),
);
let iB = &TypeVar::new(
"iB",
"A scalar integer type",
TypeSetBuilder::new().ints(Interval::All).build(),
);
let iAddr = &TypeVar::new(
"iAddr",
"An integer address type",
TypeSetBuilder::new().ints(32..64).refs(32..64).build(),
);
let Ref = &TypeVar::new(
"Ref",
"A scalar reference type",
TypeSetBuilder::new().refs(Interval::All).build(),
);
let Testable = &TypeVar::new(
"Testable",
"A scalar boolean or integer type",
TypeSetBuilder::new()
.ints(Interval::All)
.bools(Interval::All)
.build(),
);
let TxN = &TypeVar::new(
"TxN",
"A SIMD vector type",
TypeSetBuilder::new()
.ints(Interval::All)
.floats(Interval::All)
.bools(Interval::All)
.simd_lanes(Interval::All)
.includes_scalars(false)
.build(),
);
let Any = &TypeVar::new(
"Any",
"Any integer, float, boolean, or reference scalar or vector type",
TypeSetBuilder::new()
.ints(Interval::All)
.floats(Interval::All)
.bools(Interval::All)
.refs(Interval::All)
.simd_lanes(Interval::All)
.includes_scalars(true)
.build(),
);
let AnyTo = &TypeVar::copy_from(Any, "AnyTo".to_string());
let Mem = &TypeVar::new(
"Mem",
"Any type that can be stored in memory",
TypeSetBuilder::new()
.ints(Interval::All)
.floats(Interval::All)
.simd_lanes(Interval::All)
.refs(Interval::All)
.dynamic_simd_lanes(Interval::All)
.build(),
);
let MemTo = &TypeVar::copy_from(Mem, "MemTo".to_string());
let addr = &Operand::new("addr", iAddr);
let SS = &Operand::new("SS", &entities.stack_slot);
let DSS = &Operand::new("DSS", &entities.dynamic_stack_slot);
let Offset = &Operand::new("Offset", &imm.offset32).with_doc("Byte offset from base address");
let x = &Operand::new("x", Mem).with_doc("Value to be stored");
let a = &Operand::new("a", Mem).with_doc("Value loaded");
let p = &Operand::new("p", iAddr);
let MemFlags = &Operand::new("MemFlags", &imm.memflags);
ig.push(
Inst::new(
"load",
r#"
Load from memory at ``p + Offset``.
This is a polymorphic instruction that can load any value type which
has a memory representation.
"#,
&formats.load,
)
.operands_in(vec![MemFlags, p, Offset])
.operands_out(vec![a])
.can_load(true),
);
ig.push(
Inst::new(
"store",
r#"
Store ``x`` to memory at ``p + Offset``.
This is a polymorphic instruction that can store any value type with a
memory representation.
"#,
&formats.store,
)
.operands_in(vec![MemFlags, x, p, Offset])
.can_store(true),
);
let iExt8 = &TypeVar::new(
"iExt8",
"An integer type with more than 8 bits",
TypeSetBuilder::new().ints(16..64).build(),
);
let x = &Operand::new("x", iExt8);
let a = &Operand::new("a", iExt8);
ig.push(
Inst::new(
"uload8",
r#"
Load 8 bits from memory at ``p + Offset`` and zero-extend.
This is equivalent to ``load.i8`` followed by ``uextend``.
"#,
&formats.load,
)
.operands_in(vec![MemFlags, p, Offset])
.operands_out(vec![a])
.can_load(true),
);
ig.push(
Inst::new(
"sload8",
r#"
Load 8 bits from memory at ``p + Offset`` and sign-extend.
This is equivalent to ``load.i8`` followed by ``sextend``.
"#,
&formats.load,
)
.operands_in(vec![MemFlags, p, Offset])
.operands_out(vec![a])
.can_load(true),
);
ig.push(
Inst::new(
"istore8",
r#"
Store the low 8 bits of ``x`` to memory at ``p + Offset``.
This is equivalent to ``ireduce.i8`` followed by ``store.i8``.
"#,
&formats.store,
)
.operands_in(vec![MemFlags, x, p, Offset])
.can_store(true),
);
let iExt16 = &TypeVar::new(
"iExt16",
"An integer type with more than 16 bits",
TypeSetBuilder::new().ints(32..64).build(),
);
let x = &Operand::new("x", iExt16);
let a = &Operand::new("a", iExt16);
ig.push(
Inst::new(
"uload16",
r#"
Load 16 bits from memory at ``p + Offset`` and zero-extend.
This is equivalent to ``load.i16`` followed by ``uextend``.
"#,
&formats.load,
)
.operands_in(vec![MemFlags, p, Offset])
.operands_out(vec![a])
.can_load(true),
);
ig.push(
Inst::new(
"sload16",
r#"
Load 16 bits from memory at ``p + Offset`` and sign-extend.
This is equivalent to ``load.i16`` followed by ``sextend``.
"#,
&formats.load,
)
.operands_in(vec![MemFlags, p, Offset])
.operands_out(vec![a])
.can_load(true),
);
ig.push(
Inst::new(
"istore16",
r#"
Store the low 16 bits of ``x`` to memory at ``p + Offset``.
This is equivalent to ``ireduce.i16`` followed by ``store.i16``.
"#,
&formats.store,
)
.operands_in(vec![MemFlags, x, p, Offset])
.can_store(true),
);
let iExt32 = &TypeVar::new(
"iExt32",
"An integer type with more than 32 bits",
TypeSetBuilder::new().ints(64..64).build(),
);
let x = &Operand::new("x", iExt32);
let a = &Operand::new("a", iExt32);
ig.push(
Inst::new(
"uload32",
r#"
Load 32 bits from memory at ``p + Offset`` and zero-extend.
This is equivalent to ``load.i32`` followed by ``uextend``.
"#,
&formats.load,
)
.operands_in(vec![MemFlags, p, Offset])
.operands_out(vec![a])
.can_load(true),
);
ig.push(
Inst::new(
"sload32",
r#"
Load 32 bits from memory at ``p + Offset`` and sign-extend.
This is equivalent to ``load.i32`` followed by ``sextend``.
"#,
&formats.load,
)
.operands_in(vec![MemFlags, p, Offset])
.operands_out(vec![a])
.can_load(true),
);
ig.push(
Inst::new(
"istore32",
r#"
Store the low 32 bits of ``x`` to memory at ``p + Offset``.
This is equivalent to ``ireduce.i32`` followed by ``store.i32``.
"#,
&formats.store,
)
.operands_in(vec![MemFlags, x, p, Offset])
.can_store(true),
);
let I16x8 = &TypeVar::new(
"I16x8",
"A SIMD vector with exactly 8 lanes of 16-bit values",
TypeSetBuilder::new()
.ints(16..16)
.simd_lanes(8..8)
.includes_scalars(false)
.build(),
);
let a = &Operand::new("a", I16x8).with_doc("Value loaded");
ig.push(
Inst::new(
"uload8x8",
r#"
Load an 8x8 vector (64 bits) from memory at ``p + Offset`` and zero-extend into an i16x8
vector.
"#,
&formats.load,