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implement simd_cast, simd_as

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This commit is contained in:
Ralf Jung 2022-03-06 13:58:41 -05:00
parent 594a70a289
commit db06d4998f
3 changed files with 161 additions and 26 deletions
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39
src/shims/intrinsics.rs
View File

@ -515,6 +515,45 @@ enum Op {
this.write_immediate(*val, &dest.into())?;
}
}
#[rustfmt::skip]
"simd_cast" | "simd_as" => {
let &[ref op] = check_arg_count(args)?;
let (op, op_len) = this.operand_to_simd(op)?;
let (dest, dest_len) = this.place_to_simd(dest)?;
assert_eq!(dest_len, op_len);
let safe_cast = intrinsic_name == "simd_as";
for i in 0..dest_len {
let op = this.read_immediate(&this.mplace_index(&op, i)?.into())?;
let dest = this.mplace_index(&dest, i)?;
let val = match (op.layout.ty.kind(), dest.layout.ty.kind()) {
// Int-to-(int|float): always safe
(ty::Int(_) | ty::Uint(_), ty::Int(_) | ty::Uint(_) | ty::Float(_)) =>
this.misc_cast(&op, dest.layout.ty)?,
// Float-to-float: always safe
(ty::Float(_), ty::Float(_)) =>
this.misc_cast(&op, dest.layout.ty)?,
// Float-to-int in safe mode
(ty::Float(_), ty::Int(_) | ty::Uint(_)) if safe_cast =>
this.misc_cast(&op, dest.layout.ty)?,
// Float-to-int in unchecked mode
(ty::Float(FloatTy::F32), ty::Int(_) | ty::Uint(_)) if !safe_cast =>
this.float_to_int_unchecked(op.to_scalar()?.to_f32()?, dest.layout.ty)?.into(),
(ty::Float(FloatTy::F64), ty::Int(_) | ty::Uint(_)) if !safe_cast =>
this.float_to_int_unchecked(op.to_scalar()?.to_f64()?, dest.layout.ty)?.into(),
_ =>
throw_unsup_format!(
"Unsupported SIMD cast from element type {} to {}",
op.layout.ty,
dest.layout.ty
),
};
this.write_immediate(val, &dest.into())?;
}
}
// Atomic operations
"atomic_load" => this.atomic_load(args, dest, AtomicReadOp::SeqCst)?,

7
tests/compile-fail/intrinsics/simd-float-to-int.rs Normal file
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@ -0,0 +1,7 @@
// error-pattern: cannot be represented in target type `i32`
#![feature(portable_simd)]
use std::simd::*;
fn main() { unsafe {
let _x : i32x2 = f32x2::from_array([f32::MAX, f32::MIN]).to_int_unchecked();
} }

135
tests/run-pass/portable-simd.rs
View File

@ -13,13 +13,12 @@ fn simd_ops_f32() {
assert_eq!(a % b, f32x4::from_array([0.0, 0.0, 1.0, 2.0]));
assert_eq!(b.abs(), f32x4::from_array([1.0, 2.0, 3.0, 4.0]));
// FIXME use Mask::from_array once simd_cast is implemented.
assert_eq!(a.lanes_eq(f32x4::splat(5.0)*b), Mask::from_int(i32x4::from_array([0, -1, 0, 0])));
assert_eq!(a.lanes_ne(f32x4::splat(5.0)*b), Mask::from_int(i32x4::from_array([-1, 0, -1, -1])));
assert_eq!(a.lanes_le(f32x4::splat(5.0)*b), Mask::from_int(i32x4::from_array([0, -1, -1, 0])));
assert_eq!(a.lanes_lt(f32x4::splat(5.0)*b), Mask::from_int(i32x4::from_array([0, 0, -1, 0])));
assert_eq!(a.lanes_ge(f32x4::splat(5.0)*b), Mask::from_int(i32x4::from_array([-1, -1, 0, -1])));
assert_eq!(a.lanes_gt(f32x4::splat(5.0)*b), Mask::from_int(i32x4::from_array([-1, 0, 0, -1])));
assert_eq!(a.lanes_eq(f32x4::splat(5.0) * b), Mask::from_array([false, true, false, false]));
assert_eq!(a.lanes_ne(f32x4::splat(5.0) * b), Mask::from_array([true, false, true, true]));
assert_eq!(a.lanes_le(f32x4::splat(5.0) * b), Mask::from_array([false, true, true, false]));
assert_eq!(a.lanes_lt(f32x4::splat(5.0) * b), Mask::from_array([false, false, true, false]));
assert_eq!(a.lanes_ge(f32x4::splat(5.0) * b), Mask::from_array([true, true, false, true]));
assert_eq!(a.lanes_gt(f32x4::splat(5.0) * b), Mask::from_array([true, false, false, true]));
assert_eq!(a.horizontal_sum(), 40.0);
assert_eq!(b.horizontal_sum(), 2.0);
@ -39,13 +38,12 @@ fn simd_ops_f64() {
assert_eq!(a % b, f64x4::from_array([0.0, 0.0, 1.0, 2.0]));
assert_eq!(b.abs(), f64x4::from_array([1.0, 2.0, 3.0, 4.0]));
// FIXME use Mask::from_array once simd_cast is implemented.
assert_eq!(a.lanes_eq(f64x4::splat(5.0)*b), Mask::from_int(i64x4::from_array([0, -1, 0, 0])));
assert_eq!(a.lanes_ne(f64x4::splat(5.0)*b), Mask::from_int(i64x4::from_array([-1, 0, -1, -1])));
assert_eq!(a.lanes_le(f64x4::splat(5.0)*b), Mask::from_int(i64x4::from_array([0, -1, -1, 0])));
assert_eq!(a.lanes_lt(f64x4::splat(5.0)*b), Mask::from_int(i64x4::from_array([0, 0, -1, 0])));
assert_eq!(a.lanes_ge(f64x4::splat(5.0)*b), Mask::from_int(i64x4::from_array([-1, -1, 0, -1])));
assert_eq!(a.lanes_gt(f64x4::splat(5.0)*b), Mask::from_int(i64x4::from_array([-1, 0, 0, -1])));
assert_eq!(a.lanes_eq(f64x4::splat(5.0) * b), Mask::from_array([false, true, false, false]));
assert_eq!(a.lanes_ne(f64x4::splat(5.0) * b), Mask::from_array([true, false, true, true]));
assert_eq!(a.lanes_le(f64x4::splat(5.0) * b), Mask::from_array([false, true, true, false]));
assert_eq!(a.lanes_lt(f64x4::splat(5.0) * b), Mask::from_array([false, false, true, false]));
assert_eq!(a.lanes_ge(f64x4::splat(5.0) * b), Mask::from_array([true, true, false, true]));
assert_eq!(a.lanes_gt(f64x4::splat(5.0) * b), Mask::from_array([true, false, false, true]));
assert_eq!(a.horizontal_sum(), 40.0);
assert_eq!(b.horizontal_sum(), 2.0);
@ -71,13 +69,12 @@ fn simd_ops_i32() {
assert_eq!(b | i32x4::splat(2), i32x4::from_array([3, 2, 3, -2]));
assert_eq!(b ^ i32x4::splat(2), i32x4::from_array([3, 0, 1, -2]));
// FIXME use Mask::from_array once simd_cast is implemented.
assert_eq!(a.lanes_eq(i32x4::splat(5)*b), Mask::from_int(i32x4::from_array([0, -1, 0, 0])));
assert_eq!(a.lanes_ne(i32x4::splat(5)*b), Mask::from_int(i32x4::from_array([-1, 0, -1, -1])));
assert_eq!(a.lanes_le(i32x4::splat(5)*b), Mask::from_int(i32x4::from_array([0, -1, -1, 0])));
assert_eq!(a.lanes_lt(i32x4::splat(5)*b), Mask::from_int(i32x4::from_array([0, 0, -1, 0])));
assert_eq!(a.lanes_ge(i32x4::splat(5)*b), Mask::from_int(i32x4::from_array([-1, -1, 0, -1])));
assert_eq!(a.lanes_gt(i32x4::splat(5)*b), Mask::from_int(i32x4::from_array([-1, 0, 0, -1])));
assert_eq!(a.lanes_eq(i32x4::splat(5) * b), Mask::from_array([false, true, false, false]));
assert_eq!(a.lanes_ne(i32x4::splat(5) * b), Mask::from_array([true, false, true, true]));
assert_eq!(a.lanes_le(i32x4::splat(5) * b), Mask::from_array([false, true, true, false]));
assert_eq!(a.lanes_lt(i32x4::splat(5) * b), Mask::from_array([false, false, true, false]));
assert_eq!(a.lanes_ge(i32x4::splat(5) * b), Mask::from_array([true, true, false, true]));
assert_eq!(a.lanes_gt(i32x4::splat(5) * b), Mask::from_array([true, false, false, true]));
assert_eq!(a.horizontal_and(), 10);
assert_eq!(b.horizontal_and(), 0);
@ -91,6 +88,90 @@ fn simd_ops_i32() {
assert_eq!(b.horizontal_product(), -24);
}
fn simd_mask() {
let intmask = Mask::from_int(i32x4::from_array([0, -1, 0, 0]));
assert_eq!(intmask, Mask::from_array([false, true, false, false]));
assert_eq!(intmask.to_array(), [false, true, false, false]);
}
fn simd_cast() {
// between integer types
assert_eq!(i32x4::from_array([1, 2, 3, -4]), i16x4::from_array([1, 2, 3, -4]).cast());
assert_eq!(i16x4::from_array([1, 2, 3, -4]), i32x4::from_array([1, 2, 3, -4]).cast());
assert_eq!(i32x4::from_array([1, -1, 3, 4]), u64x4::from_array([1, u64::MAX, 3, 4]).cast());
// float -> int
assert_eq!(
i8x4::from_array([127, -128, 127, -128]),
f32x4::from_array([127.99, -128.99, 999.0, -999.0]).cast()
);
assert_eq!(
i32x4::from_array([0, 1, -1, 2147483520]),
f32x4::from_array([
-0.0,
/*0x1.19999ap+0*/ f32::from_bits(0x3f8ccccd),
/*-0x1.19999ap+0*/ f32::from_bits(0xbf8ccccd),
2147483520.0
])
.cast()
);
assert_eq!(
i32x8::from_array([i32::MAX, i32::MIN, i32::MAX, i32::MIN, i32::MAX, i32::MIN, 0, 0]),
f32x8::from_array([
2147483648.0f32,
-2147483904.0f32,
f32::MAX,
f32::MIN,
f32::INFINITY,
f32::NEG_INFINITY,
f32::NAN,
-f32::NAN,
])
.cast()
);
// int -> float
assert_eq!(
f32x4::from_array([
-2147483648.0,
/*0x1.26580cp+30*/ f32::from_bits(0x4e932c06),
16777220.0,
-16777220.0,
]),
i32x4::from_array([-2147483647i32, 1234567890i32, 16777219i32, -16777219i32]).cast()
);
// float -> float
assert_eq!(
f32x4::from_array([f32::INFINITY, f32::INFINITY, f32::NEG_INFINITY, f32::NEG_INFINITY]),
f64x4::from_array([f64::MAX, f64::INFINITY, f64::MIN, f64::NEG_INFINITY]).cast()
);
// unchecked casts
unsafe {
assert_eq!(
i32x4::from_array([0, 1, -1, 2147483520]),
f32x4::from_array([
-0.0,
/*0x1.19999ap+0*/ f32::from_bits(0x3f8ccccd),
/*-0x1.19999ap+0*/ f32::from_bits(0xbf8ccccd),
2147483520.0
])
.to_int_unchecked()
);
assert_eq!(
u64x4::from_array([0, 10000000000000000, u64::MAX - 2047, 9223372036854775808]),
f64x4::from_array([
-0.99999999999,
1e16,
(u64::MAX - 1024) as f64,
9223372036854775808.0
])
.to_int_unchecked()
);
}
}
fn simd_intrinsics() {
extern "platform-intrinsic" {
fn simd_eq<T, U>(x: T, y: T) -> U;
@ -112,14 +193,22 @@ fn simd_intrinsics() {
assert!(simd_reduce_all(i32x4::splat(-1)));
assert!(!simd_reduce_all(i32x2::from_array([0, -1])));
assert_eq!(simd_select(i8x4::from_array([0, -1, -1, 0]), a, b), i32x4::from_array([1, 10, 10, 4]));
assert_eq!(simd_select(i8x4::from_array([0, -1, -1, 0]), b, a), i32x4::from_array([10, 2, 10, 10]));
assert_eq!(
simd_select(i8x4::from_array([0, -1, -1, 0]), a, b),
i32x4::from_array([1, 10, 10, 4])
);
assert_eq!(
simd_select(i8x4::from_array([0, -1, -1, 0]), b, a),
i32x4::from_array([10, 2, 10, 10])
);
}
}
fn main() {
simd_mask();
simd_ops_f32();
simd_ops_f64();
simd_ops_i32();
simd_cast();
simd_intrinsics();
}