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aarch64: Migrate imul to ISLE

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This commit migrates the `imul` clif instruction lowering for AArch64 to
ISLE. This is a relatively complicated instruction with lots of special
cases due to the simd proposal for wasm. Like x64, however, the special
casing lends itself to ISLE quite well and the lowerings here in theory
are pretty straightforward.

The main gotcha of this commit is that this encounters a unique
situation which hasn't been encountered yet with other lowerings, namely
the `Umlal32` instruction used in the implementation of `i64x2.mul` is
unique in the `VecRRRLongOp` class of instructions in that it both reads
and writes the destination register (`use_mod` instead of simply
`use_def`). This meant that I needed to add another helper in ISLe for
creating a `vec_rrrr_long` instruction (despite this enum variant not
actually existing) which implicitly moves the first operand into the
destination before issuing the actual `VecRRRLong` instruction.
This commit is contained in:
Alex Crichton
2021-11-19 08:43:59 -08:00
parent 42b23dac4a
commit 33dba07e6b
10 changed files with 913 additions and 261 deletions
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11
cranelift/codegen/src/isa/x64/lower/isle/generated_code.rs generated
View File

@@ -34,6 +34,7 @@ pub trait Context {
fn fits_in_32(&mut self, arg0: Type) -> Option<Type>;
fn fits_in_64(&mut self, arg0: Type) -> Option<Type>;
fn vec128(&mut self, arg0: Type) -> Option<Type>;
fn not_i64x2(&mut self, arg0: Type) -> Option<()>;
fn value_list_slice(&mut self, arg0: ValueList) -> ValueSlice;
fn unwrap_head_value_list_1(&mut self, arg0: ValueList) -> (Value, ValueSlice);
fn unwrap_head_value_list_2(&mut self, arg0: ValueList) -> (Value, Value, ValueSlice);
@@ -66,13 +67,13 @@ pub trait Context {
fn sse_insertps_lane_imm(&mut self, arg0: u8) -> u8;
}
/// Internal type ProducesFlags: defined at src/prelude.isle line 234.
/// Internal type ProducesFlags: defined at src/prelude.isle line 238.
#[derive(Clone, Debug)]
pub enum ProducesFlags {
ProducesFlags { inst: MInst, result: Reg },
}
/// Internal type ConsumesFlags: defined at src/prelude.isle line 237.
/// Internal type ConsumesFlags: defined at src/prelude.isle line 241.
#[derive(Clone, Debug)]
pub enum ConsumesFlags {
ConsumesFlags { inst: MInst, result: Reg },
@@ -122,7 +123,7 @@ pub fn constructor_with_flags<C: Context>(
result: pattern3_1,
} = pattern2_0
{
// Rule at src/prelude.isle line 247.
// Rule at src/prelude.isle line 251.
let expr0_0 = C::emit(ctx, &pattern1_0);
let expr1_0 = C::emit(ctx, &pattern3_0);
let expr2_0 = C::value_regs(ctx, pattern1_1, pattern3_1);
@@ -150,7 +151,7 @@ pub fn constructor_with_flags_1<C: Context>(
result: pattern3_1,
} = pattern2_0
{
// Rule at src/prelude.isle line 255.
// Rule at src/prelude.isle line 259.
let expr0_0 = C::emit(ctx, &pattern1_0);
let expr1_0 = C::emit(ctx, &pattern3_0);
return Some(pattern3_1);
@@ -184,7 +185,7 @@ pub fn constructor_with_flags_2<C: Context>(
result: pattern5_1,
} = pattern4_0
{
// Rule at src/prelude.isle line 265.
// Rule at src/prelude.isle line 269.
let expr0_0 = C::emit(ctx, &pattern1_0);
let expr1_0 = C::emit(ctx, &pattern3_0);
let expr2_0 = C::emit(ctx, &pattern5_0);