Module core::intrinsicsExperimental [-] [+] [src]

rustc compiler intrinsics.

The corresponding definitions are in librustc_trans/trans/intrinsic.rs.

Volatiles

The volatile intrinsics provide operations intended to act on I/O memory, which are guaranteed to not be reordered by the compiler across other volatile intrinsics. See the LLVM documentation on [volatile].

Atomics

The atomic intrinsics provide common atomic operations on machine words, with multiple possible memory orderings. They obey the same semantics as C++11. See the LLVM documentation on [atomics].

A quick refresher on memory ordering:

Acquire - a barrier for acquiring a lock. Subsequent reads and writes take place after the barrier.
Release - a barrier for releasing a lock. Preceding reads and writes take place before the barrier.
Sequentially consistent - sequentially consistent operations are guaranteed to happen in order. This is the standard mode for working with atomic types and is equivalent to Java's volatile.

Structs

TyDesc
TypeId	`TypeId` represents a globally unique identifier for a type

Functions

abort	Abort the execution of the process.
assume	Inform the optimizer that a condition is always true. If the condition is false, the behavior is undefined.
atomic_and
atomic_and_acq
atomic_and_acqrel
atomic_and_rel
atomic_and_relaxed
atomic_cxchg
atomic_cxchg_acq
atomic_cxchg_acqrel
atomic_cxchg_rel
atomic_cxchg_relaxed
atomic_fence
atomic_fence_acq
atomic_fence_acqrel
atomic_fence_rel
atomic_load
atomic_load_acq
atomic_load_relaxed
atomic_max
atomic_max_acq
atomic_max_acqrel
atomic_max_rel
atomic_max_relaxed
atomic_min
atomic_min_acq
atomic_min_acqrel
atomic_min_rel
atomic_min_relaxed
atomic_nand
atomic_nand_acq
atomic_nand_acqrel
atomic_nand_rel
atomic_nand_relaxed
atomic_or
atomic_or_acq
atomic_or_acqrel
atomic_or_rel
atomic_or_relaxed
atomic_store
atomic_store_rel
atomic_store_relaxed
atomic_umax
atomic_umax_acq
atomic_umax_acqrel
atomic_umax_rel
atomic_umax_relaxed
atomic_umin
atomic_umin_acq
atomic_umin_acqrel
atomic_umin_rel
atomic_umin_relaxed
atomic_xadd
atomic_xadd_acq
atomic_xadd_acqrel
atomic_xadd_rel
atomic_xadd_relaxed
atomic_xchg
atomic_xchg_acq
atomic_xchg_acqrel
atomic_xchg_rel
atomic_xchg_relaxed
atomic_xor
atomic_xor_acq
atomic_xor_acqrel
atomic_xor_rel
atomic_xor_relaxed
atomic_xsub
atomic_xsub_acq
atomic_xsub_acqrel
atomic_xsub_rel
atomic_xsub_relaxed
breakpoint	Execute a breakpoint trap, for inspection by a debugger.
bswap16	Reverses the bytes in a `u16`.
bswap32	Reverses the bytes in a `u32`.
bswap64	Reverses the bytes in a `u64`.
ceilf32	Returns the smallest integer greater than or equal to an `f32`.
ceilf64	Returns the smallest integer greater than or equal to an `f64`.
copy_memory	Copies `count * size_of<T>` bytes from `src` to `dst`. The source and destination may overlap.
copy_nonoverlapping_memory	Copies `count * size_of<T>` bytes from `src` to `dst`. The source and destination may not overlap.
copysignf32	Copies the sign from `y` to `x` for `f32` values.
copysignf64	Copies the sign from `y` to `x` for `f64` values.
cosf32	Returns the cosine of an `f32`.
cosf64	Returns the cosine of an `f64`.
ctlz16	Returns the number of leading bits unset in a `u16`.
ctlz32	Returns the number of leading bits unset in a `u32`.
ctlz64	Returns the number of leading bits unset in a `u64`.
ctlz8	Returns the number of leading bits unset in a `u8`.
ctpop16	Returns the number of bits set in a `u16`.
ctpop32	Returns the number of bits set in a `u32`.
ctpop64	Returns the number of bits set in a `u64`.
ctpop8	Returns the number of bits set in a `u8`.
cttz16	Returns the number of trailing bits unset in a `u16`.
cttz32	Returns the number of trailing bits unset in a `u32`.
cttz64	Returns the number of trailing bits unset in a `u64`.
cttz8	Returns the number of trailing bits unset in a `u8`.
exp2f32	Returns 2 raised to the power of an `f32`.
exp2f64	Returns 2 raised to the power of an `f64`.
expf32	Returns the exponential of an `f32`.
expf64	Returns the exponential of an `f64`.
fabsf32	Returns the absolute value of an `f32`.
fabsf64	Returns the absolute value of an `f64`.
floorf32	Returns the largest integer less than or equal to an `f32`.
floorf64	Returns the largest integer less than or equal to an `f64`.
fmaf32	Returns `a * b + c` for `f32` values.
fmaf64	Returns `a * b + c` for `f64` values.
forget	Move a value out of scope without running drop glue.
get_tydesc	Get a static pointer to a type descriptor.
i16_add_with_overflow	Performs checked `i16` addition.
i16_mul_with_overflow	Performs checked `i16` multiplication.
i16_sub_with_overflow	Performs checked `i16` subtraction.
i32_add_with_overflow	Performs checked `i32` addition.
i32_mul_with_overflow	Performs checked `i32` multiplication.
i32_sub_with_overflow	Performs checked `i32` subtraction.
i64_add_with_overflow	Performs checked `i64` addition.
i64_mul_with_overflow	Performs checked `i64` multiplication.
i64_sub_with_overflow	Performs checked `i64` subtraction.
i8_add_with_overflow	Performs checked `i8` addition.
i8_mul_with_overflow	Performs checked `i8` multiplication.
i8_sub_with_overflow	Performs checked `i8` subtraction.
init	Create a value initialized to zero.
log10f32	Returns the base 10 logarithm of an `f32`.
log10f64	Returns the base 10 logarithm of an `f64`.
log2f32	Returns the base 2 logarithm of an `f32`.
log2f64	Returns the base 2 logarithm of an `f64`.
logf32	Returns the natural logarithm of an `f32`.
logf64	Returns the natural logarithm of an `f64`.
min_align_of
move_val_init	Move a value to an uninitialized memory location.
nearbyintf32	Returns the nearest integer to an `f32`.
nearbyintf64	Returns the nearest integer to an `f64`.
needs_drop	Returns `true` if a type requires drop glue.
offset	Calculates the offset from a pointer. The offset must be in-bounds of the object, or one-byte-past-the-end. An arithmetic overflow is also undefined behaviour.
owns_managed	Returns `true` if a type is managed (will be allocated on the local heap)
powf32	Raises an `f32` to an `f32` power.
powf64	Raises an `f64` to an `f64` power.
powif32	Raises an `f32` to an integer power.
powif64	Raises an `f64` to an integer power.
pref_align_of
return_address	Gives the address for the return value of the enclosing function.
rintf32	Returns the nearest integer to an `f32`. May raise an inexact floating-point exception if the argument is not an integer.
rintf64	Returns the nearest integer to an `f64`. May raise an inexact floating-point exception if the argument is not an integer.
roundf32	Returns the nearest integer to an `f32`. Rounds half-way cases away from zero.
roundf64	Returns the nearest integer to an `f64`. Rounds half-way cases away from zero.
set_memory	Invokes memset on the specified pointer, setting `count * size_of::<T>()` bytes of memory starting at `dst` to `c`.
sinf32	Returns the sine of an `f32`.
sinf64	Returns the sine of an `f64`.
size_of	The size of a type in bytes.
sqrtf32	Returns the square root of an `f32`
sqrtf64	Returns the square root of an `f64`
transmute	Unsafely transforms a value of one type into a value of another type.
truncf32	Returns the integer part of an `f32`.
truncf64	Returns the integer part of an `f64`.
type_id	Gets an identifier which is globally unique to the specified type. This function will return the same value for a type regardless of whichever crate it is invoked in.
u16_add_with_overflow	Performs checked `u16` addition.
u16_mul_with_overflow	Performs checked `u16` multiplication.
u16_sub_with_overflow	Performs checked `u16` subtraction.
u32_add_with_overflow	Performs checked `u32` addition.
u32_mul_with_overflow	Performs checked `u32` multiplication.
u32_sub_with_overflow	Performs checked `u32` subtraction.
u64_add_with_overflow	Performs checked `u64` addition.
u64_mul_with_overflow	Performs checked `u64` multiplication.
u64_sub_with_overflow	Performs checked `u64` subtraction.
u8_add_with_overflow	Performs checked `u8` addition.
u8_mul_with_overflow	Performs checked `u8` multiplication.
u8_sub_with_overflow	Performs checked `u8` subtraction.
uninit	Create an uninitialized value.
unreachable	Tell LLVM that this point in the code is not reachable, enabling further optimizations.
volatile_copy_memory	Equivalent to the appropriate `llvm.memmove.p0i8.0i8.` intrinsic, with a size of `count` `size_of::<T>()` and an alignment of `min_align_of::<T>()`
volatile_copy_nonoverlapping_memory	Equivalent to the appropriate `llvm.memcpy.p0i8.0i8.` intrinsic, with a size of `count` `size_of::<T>()` and an alignment of `min_align_of::<T>()`
volatile_load	Perform a volatile load from the `src` pointer.
volatile_set_memory	Equivalent to the appropriate `llvm.memset.p0i8.` intrinsic, with a size of `count` `size_of::<T>()` and an alignment of `min_align_of::<T>()`.
volatile_store	Perform a volatile store to the `dst` pointer.

Type Definitions

GlueFn

Modules

Macros