ogl_beamforming

intrinsics.c (5564B)

---

 /* See LICENSE for license details. */
 #include "compiler.h"
 
 #if COMPILER_CLANG || COMPILER_GCC
   #define force_inline inline __attribute__((always_inline))
 #elif COMPILER_MSVC
   #define force_inline __forceinline
 #endif
 
 #if COMPILER_MSVC || (COMPILER_CLANG && OS_WINDOWS)
   #pragma section(".rdata$", read)
   #define read_only __declspec(allocate(".rdata$"))
 #elif COMPILER_CLANG
   #define read_only __attribute__((section(".rodata")))
 #elif COMPILER_GCC
   /* TODO(rnp): how do we do this with gcc, putting it in rodata causes warnings and writing to
    * it doesn't cause a fault */
   #define read_only
 #endif
 
 #if COMPILER_MSVC
   #define align_as(n)    __declspec(align(n))
   #define pack_struct(s) __pragma(pack(push, 1)) s __pragma(pack(pop))
   #define no_return      __declspec(noreturn)
 
   #define debugbreak()  __debugbreak()
   #define unreachable() __assume(0)
 
   #define atomic_store_u64(ptr, n)     *((volatile u64 *)(ptr)) = (n)
   #define atomic_store_u32(ptr, n)     *((volatile u32 *)(ptr)) = (n)
   #define atomic_load_u64(ptr)         *((volatile u64 *)(ptr))
   #define atomic_load_u32(ptr)         *((volatile u32 *)(ptr))
   #define atomic_add_u64(ptr, n)         _InterlockedExchangeAdd64((volatile u64 *)(ptr), (n))
   #define atomic_add_u32(ptr, n)         _InterlockedExchangeAdd((volatile u32 *)(ptr), (n))
   #define atomic_and_u64(ptr, n)         _InterlockedAnd64((volatile u64 *)(ptr), (n))
   #define atomic_and_u32(ptr, n)         _InterlockedAnd((volatile u32 *)(ptr), (n))
   #define atomic_cas_u64(ptr, cptr, n)  (_InterlockedCompareExchange64((volatile u64 *)(ptr), *(cptr), (n)) == *(cptr))
   #define atomic_cas_u32(ptr, cptr, n)  (_InterlockedCompareExchange((volatile u32 *)(ptr),   *(cptr), (n)) == *(cptr))
   #define atomic_or_u32(ptr, n)          _InterlockedOr((volatile u32 *)(ptr), (n))
 
   #define atan2_f32(y, x) atan2f(y, x)
   #define ceil_f32(a)     ceilf(a)
   #define sqrt_f32(a)     sqrtf(a)
 
 #else
   #define align_as(n)      __attribute__((aligned(n)))
   #define pack_struct(s) s __attribute__((packed))
   #define no_return        __attribute__((noreturn))
 
   #if ARCH_ARM64
     /* TODO? debuggers just loop here forever and need a manual PC increment (step over) */
     #define debugbreak() asm volatile ("brk 0xf000")
   #else
     #define debugbreak() asm volatile ("int3; nop")
   #endif
   #define unreachable() __builtin_unreachable()
 
   #define atomic_store_u64(ptr, n)      __atomic_store_n(ptr,    n, __ATOMIC_RELEASE)
   #define atomic_load_u64(ptr)          __atomic_load_n(ptr,        __ATOMIC_ACQUIRE)
   #define atomic_add_u64(ptr, n)        __atomic_fetch_add(ptr,  n, __ATOMIC_ACQ_REL)
   #define atomic_and_u64(ptr, n)        __atomic_and_fetch(ptr,  n, __ATOMIC_RELEASE)
   #define atomic_cas_u64(ptr, cptr, n)  __atomic_compare_exchange_n(ptr, cptr, n, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
   #define atomic_or_u32(ptr, n)         __atomic_or_fetch(ptr,   n, __ATOMIC_RELEASE)
   #define atomic_add_u32                atomic_add_u64
   #define atomic_and_u32                atomic_and_u64
   #define atomic_cas_u32                atomic_cas_u64
   #define atomic_load_u32               atomic_load_u64
   #define atomic_store_u32              atomic_store_u64
 
   #define atan2_f32(y, x) __builtin_atan2f(y, x)
   #define ceil_f32(a)     __builtin_ceilf(a)
   #define sqrt_f32(a)     __builtin_sqrtf(a)
 
 #endif
 
 #if COMPILER_MSVC
 
 function force_inline u32
 clz_u32(u32 a)
 {
 	u32 result = 32, index;
 	if (a) {
 		_BitScanReverse(&index, a);
 		result = index;
 	}
 	return result;
 }
 
 function force_inline u32
 ctz_u32(u32 a)
 {
 	u32 result = 32, index;
 	if (a) {
 		_BitScanForward(&index, a);
 		result = index;
 	}
 	return result;
 }
 
 #else /* !COMPILER_MSVC */
 
 function force_inline u32
 clz_u32(u32 a)
 {
 	u32 result = 32;
 	if (a) result = __builtin_clz(a);
 	return result;
 }
 
 function force_inline u32
 ctz_u32(u32 a)
 {
 	u32 result = 32;
 	if (a) result = __builtin_ctz(a);
 	return result;
 }
 
 #endif
 
 #if ARCH_ARM64
 /* NOTE(rnp): we are only doing a handful of f32x4 operations so we will just use NEON and do
  * the macro renaming thing. If you are implementing a serious wide vector operation you should
  * use SVE(2) instead. The semantics are different however and the code will be written for an
  * arbitrary vector bit width. In that case you will also need x86_64 code for determining
  * the supported vector width (ideally at runtime though that may not be possible).
  */
 #include <arm_neon.h>
 typedef float32x4_t f32x4;
 typedef int32x4_t   i32x4;
 
 #define cvt_i32x4_f32x4(a)    vcvtq_f32_s32(a)
 #define cvt_f32x4_i32x4(a)    vcvtq_s32_f32(a)
 #define dup_f32x4(f)          vdupq_n_f32(f)
 #define load_f32x4(a)         vld1q_f32(a)
 #define load_i32x4(a)         vld1q_s32(a)
 #define mul_f32x4(a, b)       vmulq_f32(a, b)
 #define set_f32x4(a, b, c, d) vld1q_f32((f32 []){d, c, b, a})
 #define sqrt_f32x4(a)         vsqrtq_f32(a)
 #define store_f32x4(a, o)     vst1q_f32(o, a)
 #define store_i32x4(a, o)     vst1q_s32(o, a)
 
 #elif ARCH_X64
 #include <immintrin.h>
 typedef __m128  f32x4;
 typedef __m128i i32x4;
 
 #define cvt_i32x4_f32x4(a)    _mm_cvtepi32_ps(a)
 #define cvt_f32x4_i32x4(a)    _mm_cvtps_epi32(a)
 #define dup_f32x4(f)          _mm_set1_ps(f)
 #define load_f32x4(a)         _mm_loadu_ps(a)
 #define load_i32x4(a)         _mm_loadu_si128((i32x4 *)a)
 #define mul_f32x4(a, b)       _mm_mul_ps(a, b)
 #define set_f32x4(a, b, c, d) _mm_set_ps(a, b, c, d)
 #define sqrt_f32x4(a)         _mm_sqrt_ps(a)
 #define store_f32x4(a, o)     _mm_storeu_ps(o, a)
 #define store_i32x4(a, o)     _mm_storeu_si128((i32x4 *)o, a)
 
 #endif