futhark-0.25.32: rts/c/atomics16.h
// Start of atomics16.h
SCALAR_FUN_ATTR int16_t atomic_cmpxchg_i16_global(volatile __global int16_t *p,
int16_t cmp, int16_t val);
SCALAR_FUN_ATTR int16_t atomic_cmpxchg_i16_shared(volatile __local int16_t *p,
int16_t cmp, int16_t val);
SCALAR_FUN_ATTR int16_t atomic_add_i16_global(volatile __global int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_add_i16_shared(volatile __local int16_t *p, int16_t x);
SCALAR_FUN_ATTR f16 atomic_fadd_f16_global(volatile __global uint16_t *p, f16 x);
SCALAR_FUN_ATTR f16 atomic_fadd_f16_shared(volatile __local uint16_t *p, f16 x);
SCALAR_FUN_ATTR int16_t atomic_smax_i16_global(volatile __global int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_smax_i16_shared(volatile __local int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_smin_i16_global(volatile __global int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_smin_i16_shared(volatile __local int16_t *p, int16_t x);
SCALAR_FUN_ATTR uint16_t atomic_umax_i16_global(volatile __global uint16_t *p, uint16_t x);
SCALAR_FUN_ATTR uint16_t atomic_umax_i16_shared(volatile __local uint16_t *p, uint16_t x);
SCALAR_FUN_ATTR uint16_t atomic_umin_i16_global(volatile __global uint16_t *p, uint16_t x);
SCALAR_FUN_ATTR uint16_t atomic_umin_i16_shared(volatile __local uint16_t *p, uint16_t x);
SCALAR_FUN_ATTR int16_t atomic_and_i16_global(volatile __global int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_and_i16_shared(volatile __local int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_or_i16_global(volatile __global int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_or_i16_shared(volatile __local int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_xor_i16_global(volatile __global int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_xor_i16_shared(volatile __local int16_t *p, int16_t x);
SCALAR_FUN_ATTR int16_t atomic_cmpxchg_i16_global(volatile __global int16_t *p,
int16_t cmp, int16_t val) {
int offset = ((uintptr_t)p >> 1 & 1);
volatile __global int32_t *p32 = (volatile __global int32_t*)((uintptr_t)p & ~0x3);
int shift = offset * 16;
int32_t mask = 0xffff << shift;
int32_t shifted_val = val << shift;
int32_t shifted_cmp = cmp << shift;
uint32_t old = shifted_cmp;
uint32_t upd = shifted_val;
uint32_t got;
while ((got=atomic_cmpxchg_i32_global(p32, old, upd)) != old) {
old = got;
upd = (old & ~mask) | shifted_val;
}
return old >> shift;
}
SCALAR_FUN_ATTR int16_t atomic_cmpxchg_i16_shared(volatile __local int16_t *p,
int16_t cmp, int16_t val) {
int offset = ((uintptr_t)p >> 1 & 1);
volatile __local int32_t *p32 = (volatile __local int32_t*)((uintptr_t)p & ~0x3);
int shift = offset * 16;
int32_t mask = 0xffff << shift;
int32_t shifted_val = val << shift;
int32_t shifted_cmp = cmp << shift;
uint32_t old = shifted_cmp;
uint32_t upd = shifted_val;
uint32_t got;
while ((got=atomic_cmpxchg_i32_shared(p32, old, upd)) != old) {
old = got;
upd = (old & ~mask) | shifted_val;
}
return old >> shift;
}
// Convenience macro for arithmetic.
#define DEFINE_16BIT_ATOMIC(name, T, op) \
SCALAR_FUN_ATTR T \
atomic_##name##_i16_global(volatile __global T *p, T val) { \
int offset = ((uintptr_t)p >> 1 & 1); \
volatile __global int32_t *p32 = (volatile __global int32_t*)((uintptr_t)p & ~0x3); \
int shift = offset * 16; \
int32_t mask = 0xffff << shift; \
int32_t old = 0; \
int32_t upd = mask & (op(old >> shift, val) << shift); \
int32_t saw; \
while ((saw=atomic_cmpxchg_i32_global(p32, old, upd)) != old) { \
old = saw; \
upd = (old & ~mask) | ((op(old >> shift, val)) << shift); \
} \
return old >> shift; \
} \
SCALAR_FUN_ATTR T \
atomic_##name##_i16_shared(volatile __local T *p, T val) { \
int offset = ((uintptr_t)p >> 1 & 1); \
volatile __local int32_t *p32 = (volatile __local int32_t*)((uintptr_t)p & ~0x3); \
int shift = offset * 16; \
int32_t mask = 0xffff << shift; \
int32_t old = 0; \
int32_t upd = mask & ((op(old >> shift, val)) << shift); \
int32_t saw; \
while ((saw=atomic_cmpxchg_i32_shared(p32, old, upd)) != old) { \
old = saw; \
upd = (old & ~mask) | ((op(old >> shift, val)) << shift); \
} \
return old >> shift; \
}
DEFINE_16BIT_ATOMIC(add, int16_t, add16);
DEFINE_16BIT_ATOMIC(smax, int16_t, smax16);
DEFINE_16BIT_ATOMIC(smin, int16_t, smin16);
DEFINE_16BIT_ATOMIC(umax, uint16_t, umax16);
DEFINE_16BIT_ATOMIC(umin, uint16_t, umin16);
SCALAR_FUN_ATTR int16_t atomic_and_i16_global(volatile __global int16_t *p, int16_t val) {
volatile __global int32_t *p32 = (volatile __global int32_t*)((uintptr_t)p & ~0x3);
int shift = ((uintptr_t)p >> 1 & 1) * 16;
int32_t mask = 0xffff << shift;
return atomic_and_i32_global(p32, ~mask | (val<<shift)) >> shift;
}
SCALAR_FUN_ATTR int16_t atomic_and_i16_shared(volatile __local int16_t *p, int16_t val) {
volatile __local int32_t *p32 = (volatile __local int32_t*)((uintptr_t)p & ~0x3);
int shift = ((uintptr_t)p >> 1 & 1) * 16;
int32_t mask = 0xffff << shift;
return atomic_and_i32_shared(p32, ~mask | (val<<shift)) >> shift;
}
SCALAR_FUN_ATTR int16_t atomic_or_i16_global(volatile __global int16_t *p, int16_t val) {
volatile __global int32_t *p32 = (volatile __global int32_t*)((uintptr_t)p & ~0x3);
int shift = ((uintptr_t)p >> 1 & 1) * 16;
return atomic_or_i32_global(p32, (uint16_t)val<<shift) >> shift;
}
SCALAR_FUN_ATTR int16_t atomic_or_i16_shared(volatile __local int16_t *p, int16_t val) {
volatile __local int32_t *p32 = (volatile __local int32_t*)((uintptr_t)p & ~0x3);
int shift = ((uintptr_t)p >> 1 & 1) * 16;
return atomic_or_i32_shared(p32, (uint16_t)val<<shift) >> shift;
}
SCALAR_FUN_ATTR int16_t atomic_xor_i16_global(volatile __global int16_t *p, int16_t val) {
volatile __global int32_t *p32 = (volatile __global int32_t*)((uintptr_t)p & ~0x3);
int shift = ((uintptr_t)p >> 1 & 1) * 16;
return atomic_xor_i32_global(p32, (uint16_t)val<<shift) >> shift;
}
SCALAR_FUN_ATTR int16_t atomic_xor_i16_shared(volatile __local int16_t *p, int16_t val) {
volatile __local int32_t *p32 = (volatile __local int32_t*)((uintptr_t)p & ~0x3);
int shift = ((uintptr_t)p >> 1 & 1) * 16;
return atomic_xor_i32_shared(p32, (uint16_t)val<<shift) >> shift;
}
SCALAR_FUN_ATTR f16 atomic_fadd_f16_global(volatile __global uint16_t *p, f16 val) {
int offset = ((uintptr_t)p >> 1 & 1);
volatile __global int32_t *p32 = (volatile __global int32_t*)((uintptr_t)p & ~0x3);
int shift = offset * 16;
int32_t mask = 0xffff << shift;
int32_t old = 0;
int32_t upd = mask & ((int32_t)fptobits_f16_i16(val) << shift);
int32_t saw;
while ((saw=atomic_cmpxchg_i32_global(p32, old, upd)) != old) {
old = saw;
upd = (old & ~mask) | (int32_t)fptobits_f16_i16(bitstofp_i16_f16((uint32_t)old >> shift) + val) << shift;
}
return bitstofp_i16_f16((uint32_t)old >> shift);
}
SCALAR_FUN_ATTR f16 atomic_fadd_f16_shared(volatile __local uint16_t *p, f16 val) {
int offset = ((uintptr_t)p >> 1 & 1);
volatile __local int32_t *p32 = (volatile __local int32_t*)((uintptr_t)p & ~0x3);
int shift = offset * 16;
int32_t mask = 0xffff << shift;
int32_t old = 0;
int32_t upd = mask & ((int32_t)fptobits_f16_i16(val) << shift);
int32_t saw;
while ((saw=atomic_cmpxchg_i32_shared(p32, old, upd)) != old) {
old = saw;
upd = (old & ~mask) | (int32_t)fptobits_f16_i16(bitstofp_i16_f16((uint32_t)old >> shift) + val) << shift;
}
return bitstofp_i16_f16((uint32_t)old >> shift);
}
// End of atomics16.h