spirv_std/arch/atomics.rs
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#[cfg(target_arch = "spirv")]
use core::arch::asm;
use crate::{
float::Float,
integer::{Integer, SignedInteger, UnsignedInteger},
number::Number,
};
/// Atomically load through `ptr` using the given `SEMANTICS`. All subparts of
/// the value that is loaded are read atomically with respect to all other
/// atomic accesses to it within `SCOPE`.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicLoad")]
#[inline]
pub unsafe fn atomic_load<N: Number, const SCOPE: u32, const SEMANTICS: u32>(ptr: &N) -> N {
let mut result = N::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%result = OpAtomicLoad _ {ptr} %scope %semantics",
"OpStore {result} %result",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
result = in(reg) &mut result
}
result
}
/// Atomically store through `ptr` using the given `SEMANTICS`. All subparts of
/// `value` are written atomically with respect to all other atomic accesses to
/// it within `SCOPE`.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicStore")]
#[inline]
pub unsafe fn atomic_store<N: Number, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut N,
value: N,
) {
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"OpAtomicStore {ptr} %scope %semantics %value",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
value = in(reg) &value
}
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within `SCOPE` to the same location:
///
/// 1. Load through `ptr` to get the original value,
/// 2. Get a new value from copying `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicExchange")]
#[inline]
pub unsafe fn atomic_exchange<N: Number, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut N,
value: N,
) -> N {
let mut old = N::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicExchange _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within `SCOPE` to the same location:
///
/// 1. Load through `ptr` to get the original value
/// 2. Get a new value from `value` only if the original value equals
/// `comparator`, and
/// 3. Store the new value back through `ptr`, only if the original value
/// equaled `comparator`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicCompareExchange")]
#[inline]
pub unsafe fn atomic_compare_exchange<
I: Integer,
const SCOPE: u32,
const EQUAL: u32,
const UNEQUAL: u32,
>(
ptr: &mut I,
value: I,
comparator: I,
) -> I {
let mut old = I::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%equal = OpConstant %u32 {equal}",
"%unequal = OpConstant %u32 {unequal}",
"%value = OpLoad _ {value}",
"%comparator = OpLoad _ {comparator}",
"%old = OpAtomicCompareExchange _ {ptr} %scope %equal %unequal %value %comparator",
"OpStore {old} %old",
scope = const SCOPE,
equal = const EQUAL,
unequal = const UNEQUAL,
ptr = in(reg) ptr,
value = in(reg) &value,
comparator = in(reg) &comparator,
old = in(reg) &mut old,
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within `SCOPE` to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value through integer addition of 1 to original value, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicIIncrement")]
#[inline]
pub unsafe fn atomic_i_increment<I: Integer, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut I,
) -> I {
let mut old = I::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%old = OpAtomicIIncrement _ {ptr} %scope %semantics",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within `SCOPE` to the same location:
///
/// 1) load through `ptr` to get an original value,
/// 2) get a new value through integer subtraction of 1 from original value, and
/// 3) store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicIDecrement")]
#[inline]
pub unsafe fn atomic_i_decrement<I: Integer, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut I,
) -> I {
let mut old = I::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%old = OpAtomicIDecrement _ {ptr} %scope %semantics",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within `SCOPE` to the same location:
///
/// 1) load through `ptr` to get an original value,
/// 2) get a new value by integer addition of original value and `value`, and
/// 3) store the new value back through `ptr`.
///
/// The result is the Original Value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicIAdd")]
#[inline]
pub unsafe fn atomic_i_add<I: Integer, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut I,
value: I,
) -> I {
let mut old = I::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicIAdd _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within `SCOPE` to the same location:
///
/// 1) load through `ptr` to get an original value,
/// 2) get a new value by integer subtraction of original value and `value`, and
/// 3) store the new value back through `ptr`.
///
/// The result is the Original Value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicISub")]
#[inline]
pub unsafe fn atomic_i_sub<I: Integer, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut I,
value: I,
) -> I {
let mut old = I::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicISub _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by finding the smallest signed integer of original value
/// and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicSMin")]
#[inline]
pub unsafe fn atomic_s_min<S: SignedInteger, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut S,
value: S,
) -> S {
let mut old = S::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicSMin _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by finding the smallest unsigned integer of original
/// value and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicUMin")]
#[inline]
pub unsafe fn atomic_u_min<U: UnsignedInteger, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut U,
value: U,
) -> U {
let mut old = U::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicUMin _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by finding the largest signed integer of original value
/// and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicSMax")]
#[inline]
pub unsafe fn atomic_s_max<S: SignedInteger, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut S,
value: S,
) -> S {
let mut old = S::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicSMax _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by finding the largest unsigned integer of original
/// value and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicUMax")]
#[inline]
pub unsafe fn atomic_u_max<U: UnsignedInteger, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut U,
value: U,
) -> U {
let mut old = U::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicUMax _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by the bitwise AND of the original value and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicAnd")]
#[inline]
pub unsafe fn atomic_and<I: Integer, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut I,
value: I,
) -> I {
let mut old = I::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicAnd _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by the bitwise OR of the original value and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicOr")]
#[inline]
pub unsafe fn atomic_or<I: Integer, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut I,
value: I,
) -> I {
let mut old = I::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicOr _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by the bitwise XOR of the original value and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicXor")]
#[inline]
pub unsafe fn atomic_xor<I: Integer, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut I,
value: I,
) -> I {
let mut old = I::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicXor _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by finding the smallest signed integer of original value
/// and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicFMinEXT")]
#[inline]
pub unsafe fn atomic_f_min<F: Float, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut F,
value: F,
) -> F {
let mut old = F::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicFMinEXT _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within Scope to the same location:
///
/// 1. Load through `ptr` to get an original value,
/// 2. Get a new value by finding the largest signed integer of original value
/// and `value`, and
/// 3. Store the new value back through `ptr`.
///
/// The result is the original value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicFMaxEXT")]
#[inline]
pub unsafe fn atomic_f_max<F: Float, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut F,
value: F,
) -> F {
let mut old = F::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicFMaxEXT _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}
/// Perform the following steps atomically with respect to any other atomic
/// accesses within `SCOPE` to the same location:
///
/// 1) load through `ptr` to get an original value,
/// 2) get a new value by integer addition of original value and `value`, and
/// 3) store the new value back through `ptr`.
///
/// The result is the Original Value.
#[spirv_std_macros::gpu_only]
#[doc(alias = "OpAtomicFAddEXT")]
#[inline]
pub unsafe fn atomic_f_add<F: Float, const SCOPE: u32, const SEMANTICS: u32>(
ptr: &mut F,
value: F,
) -> F {
let mut old = F::default();
asm! {
"%u32 = OpTypeInt 32 0",
"%scope = OpConstant %u32 {scope}",
"%semantics = OpConstant %u32 {semantics}",
"%value = OpLoad _ {value}",
"%old = OpAtomicFAddEXT _ {ptr} %scope %semantics %value",
"OpStore {old} %old",
scope = const SCOPE,
semantics = const SEMANTICS,
ptr = in(reg) ptr,
old = in(reg) &mut old,
value = in(reg) &value
}
old
}