macros.h

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#ifndef _MACROS_H_
#define _MACROS_H_
 
 
#ifndef __sgi
#define GLOBAL_ASM(...)
#endif
 
#if !defined(__sgi) && (!defined(NON_MATCHING) || !defined(AVOID_UB))
// asm-process isn't supported outside of IDO, and undefined behavior causes
// crashes.
//#error Matching build is only possible on IDO; please build with NON_MATCHING=1.
#endif
 
#define ARRAY_COUNT(arr) (s32)(sizeof(arr) / sizeof(arr[0]))
 
#define GLUE(a, b) a ## b
#define GLUE2(a, b) GLUE(a, b)
 
// Avoid compiler warnings for unused variables
#ifdef __GNUC__
#define UNUSED __attribute__((unused))
#else
#define UNUSED
#endif
 
// Avoid undefined behaviour for non-returning functions
#ifdef __GNUC__
#define NORETURN __attribute__((noreturn))
#else
#define NORETURN
#endif
 
// Avoid undefined behaviour for non-returning functions
#ifdef __GNUC__
#define NO_REORDER __attribute__((no_reorder))
#else
#define NO_REORDER
#endif
 
// Static assertions
#ifdef __GNUC__
#define STATIC_ASSERT(cond, msg) _Static_assert(cond, msg)
#else
#define STATIC_ASSERT(cond, msg) typedef char GLUE2(static_assertion_failed, __LINE__)[(cond) ? 1 : -1]
#endif
 
// Align to 8-byte boundary for DMA requirements
#ifdef __GNUC__
#define ALIGNED8 __attribute__((aligned(8)))
#else
#define ALIGNED8
#endif
 
// Align to 16-byte boundary for audio lib requirements
#ifdef __GNUC__
#define ALIGNED16 __attribute__((aligned(16)))
#else
#define ALIGNED16
#endif
 
// Fixed point macros
#define FTOFIX(f)      ((s32)((f) * 65536.0))
#define ITOFIX(i)      ((s32)((i) << 16))
#define FIXTOF(x)      ((double)((x) / 65536.0))
#define FIXTOI(x)      ((s32)((x) >> 16))
 
// Split fixed-point values into its integer or fractional parts.
#define toFixedInt(f)  (FTOFIX(f) >> 16)
#define toFrac(f)      (FTOFIX(f) & 0xFFFF)
 
// Setup a fixed-point matrix using floats or doubles. Recommend using doubles for more precision.
#define toFixedPointMatrix(x1, x2, x3, x4,  x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15, x16)                                                                                   \
    {{((toFixedInt(x1)) << 16) | toFixedInt(x2),  ((toFixedInt(x3))  << 16) | toFixedInt(x4),  (toFixedInt(x5)  << 16) | toFixedInt(x6),  (toFixedInt(x7) << 16)  | toFixedInt(x8)}, \
    {((toFixedInt(x9)) << 16) | toFixedInt(x10), ((toFixedInt(x11)) << 16) | toFixedInt(x12), (toFixedInt(x13) << 16) | toFixedInt(x14), (toFixedInt(x15) << 16) | toFixedInt(x16)}, \
    {((toFrac(x1))     << 16) | toFrac(x2),      ((toFrac(x3))      << 16) | toFrac(x4),      (toFrac(x5)      << 16) | toFrac(x6),      (toFrac(x7) << 16)      | toFrac(x8)},      \
    {((toFrac(x9))     << 16) | toFrac(x10),     ((toFrac(x11))     << 16) | toFrac(x12),     (toFrac(x13)     << 16) | toFrac(x14),     (toFrac(x15) << 16)     | toFrac(x16)}}
 
// convert a virtual address to physical.
#define VIRTUAL_TO_PHYSICAL(addr)   ((uintptr_t)(addr) & 0x1FFFFFFF)
 
// convert a physical address to virtual.
#define PHYSICAL_TO_VIRTUAL(addr)   ((uintptr_t)(addr) | 0x80000000)
 
// another way of converting virtual to physical
#define VIRTUAL_TO_PHYSICAL2(addr)  ((u8 *)(addr) - 0x80000000U)
 
// aligns an address to the next 16 bytes
#define ALIGN16(val) (((val) + 0xF) & ~0xF)
 
#define GET_PACKED_END(dl) (((u8 *) dl) + sizeof(dl) - sizeof(dl[0]) - 0x07000000)
 
#endif