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https://github.com/encounter/ac-decomp.git
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Cuyler36
125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
#ifndef _DOLPHIN_OS_OSFASTCAST_H
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#define _DOLPHIN_OS_OSFASTCAST_H
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#include "types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif // ifdef __cplusplus
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/////// FAST CAST DEFINES ////////
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// GQR formats.
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#define OS_GQR_U8 (0x0004) // GQR 1
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#define OS_GQR_U16 (0x0005) // GQR 2
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#define OS_GQR_S8 (0x0006) // GQR 3
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#define OS_GQR_S16 (0x0007) // GQR 4
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// GQRs for fast casting.
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#define OS_FASTCAST_U8 (2)
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#define OS_FASTCAST_U16 (3)
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#define OS_FASTCAST_S8 (4)
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#define OS_FASTCAST_S16 (5)
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//////////////////////////////////
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/////// FAST CAST INLINES ////////
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// Initialise fast casting.
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static inline void OSInitFastCast() {
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#ifdef __MWERKS__ // clang-format off
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asm {
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li r3, OS_GQR_U8
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oris r3, r3, OS_GQR_U8
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mtspr 0x392, r3
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li r3, OS_GQR_U16
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oris r3, r3, OS_GQR_U16
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mtspr 0x393, r3
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li r3, OS_GQR_S8
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oris r3, r3, OS_GQR_S8
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mtspr 0x394, r3
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li r3, OS_GQR_S16
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oris r3, r3, OS_GQR_S16
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mtspr 0x395, r3
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}
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#endif // clang-format on
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}
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// Float to int.
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static inline s16 __OSf32tos16(register f32 inF) {
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register s16 out;
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u32 tmp;
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register u32* tmpPtr = &tmp;
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#ifdef __MWERKS__ // clang-format off
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asm {
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psq_st inF, 0(tmpPtr), 0x1, OS_FASTCAST_S16
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lha out, 0(tmpPtr)
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}
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#endif // clang-format on
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return out;
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}
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static inline void OSf32tos16(f32* f, s16* out) {
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*out = __OSf32tos16(*f);
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}
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static inline u8 __OSf32tou8(register f32 inF) {
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register u8 out;
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u32 tmp;
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register u32* tmpPtr = &tmp;
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#ifdef __MWERKS__ // clang-format off
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asm {
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psq_st inF, 0(tmpPtr), 0x1, OS_FASTCAST_U8
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lbz out, 0(tmpPtr)
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}
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#endif // clang-format on
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return out;
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}
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static inline void OSf32tou8(f32* f, u8* out) {
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*out = __OSf32tou8(*f);
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}
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static inline s8 __OSf32tos8(register f32 inF) {
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register s8 out;
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u32 tmp;
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register u32* tmpPtr = &tmp;
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#ifdef __MWERKS__ // clang-format off
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asm {
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psq_st inF, 0(tmpPtr), 0x1, OS_FASTCAST_S8
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lbz out, 0(tmpPtr)
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extsb out, out
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}
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#endif // clang-format on
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return out;
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}
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static inline void OSf32tos8(f32* f, s8* out) {
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*out = __OSf32tos8(*f);
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}
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static inline float __OSs16tof32(register s16* s) {
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register float f;
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#ifdef __MWERKS__ // clang-format off
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asm {
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psq_l f, 0(s), 1, 5
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}
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#endif // clang-format on
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return f;
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}
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static inline void OSs16tof32(register s16* s, volatile register f32* f) {
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*f = __OSs16tof32(s);
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}
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//////////////////////////////////
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#ifdef __cplusplus
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};
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#endif // ifdef __cplusplus
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#endif
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