diff options
Diffstat (limited to 'arm9/lib/NitroSDK/src/FX_vec.c')
| -rw-r--r-- | arm9/lib/NitroSDK/src/FX_vec.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arm9/lib/NitroSDK/src/FX_vec.c b/arm9/lib/NitroSDK/src/FX_vec.c new file mode 100644 index 00000000..005872ac --- /dev/null +++ b/arm9/lib/NitroSDK/src/FX_vec.c @@ -0,0 +1,109 @@ +#include "fx.h" + +#include "global.h" +#include "registers.h" + +ARM_FUNC void VEC_Add(struct Vecx32 *a, struct Vecx32 *b, struct Vecx32 *dst){ + dst->x = a->x + b->x; + dst->y = a->y + b->y; + dst->z = a->z + b->z; +} + +ARM_FUNC void VEC_Subtract(struct Vecx32 *a, struct Vecx32 *b, struct Vecx32 *dst){ + dst->x = a->x - b->x; + dst->y = a->y - b->y; + dst->z = a->z - b->z; +} + +ARM_FUNC void VEC_Fx16Add(struct Vecx16 *a, struct Vecx16 *b, struct Vecx16 *dst){ + dst->x = (s16)(a->x + b->x); + dst->y = (s16)(a->y + b->y); + dst->z = (s16)(a->z + b->z); +} + +ARM_FUNC fx32 VEC_DotProduct(struct Vecx32 *a, struct Vecx32 *b){ + return (fx32)(((fx64)a->x * b->x + (fx64)a->y * b->y + (fx64)a->z * b->z + (1 << (FX64_INT_SHIFT - 1))) >> FX64_INT_SHIFT); +} + +ARM_FUNC fx32 VEC_Fx16DotProduct(struct Vecx16 *a, struct Vecx16 *b){ + fx32 temp1, temp2; + temp1 = (a->x * b->x) + (a->y * b->y); + temp2 = (a->z * b->z) + (1 << (FX64_INT_SHIFT - 1)); + return (fx32)(((fx64)temp1 + temp2) >> FX64_INT_SHIFT); +} + +ARM_FUNC void VEC_CrossProduct(struct Vecx32 *a, struct Vecx32 *b, struct Vecx32 *dst){ + fx32 x, y, z; + x = (fx32)(((fx64)a->y * b->z - (fx64)a->z * b->y + (1 << (FX64_INT_SHIFT - 1))) >> FX64_INT_SHIFT); + y = (fx32)(((fx64)a->z * b->x - (fx64)a->x * b->z + (1 << (FX64_INT_SHIFT - 1))) >> FX64_INT_SHIFT); + z = (fx32)(((fx64)a->x * b->y - (fx64)a->y * b->x + (1 << (FX64_INT_SHIFT - 1))) >> FX64_INT_SHIFT); + dst->x = x; + dst->y = y; + dst->z = z; +} + +ARM_FUNC void VEC_Fx16CrossProduct(struct Vecx16 *a, struct Vecx16 *b, struct Vecx16 *dst){ + fx32 x, y, z; + x = ((a->y * b->z - a->z * b->y + (1 << (FX64_INT_SHIFT - 1))) >> FX64_INT_SHIFT); + y = ((a->z * b->x - a->x * b->z + (1 << (FX64_INT_SHIFT - 1))) >> FX64_INT_SHIFT); + z = ((a->x * b->y - a->y * b->x + (1 << (FX64_INT_SHIFT - 1))) >> FX64_INT_SHIFT); + dst->x = (fx16)x; + dst->y = (fx16)y; + dst->z = (fx16)z; +} + +ARM_FUNC fx32 VEC_Mag(struct Vecx32 *a){ + fx64 l2 = (fx64)a->x * a->x; + l2 += (fx64)a->y * a->y; + l2 += (fx64)a->z * a->z; + reg_CP_SQRTCNT = 0x1; + reg_CP_SQRT_PARAM = (u64)(l2 * 4); + while (reg_CP_SQRTCNT & 0x8000) {} //wait for coprocessor to finish + return ((fx32)reg_CP_SQRT_RESULT + 1) >> 1; +} + +ARM_FUNC void VEC_Normalize(struct Vecx32 *a, struct Vecx32 *dst){ + fx64 l2 = (fx64)a->x * a->x; + l2 += (fx64)a->y * a->y; + l2 += (fx64)a->z * a->z; + //1/sqrt(l) is computed by calculating sqrt(l)*(1/l) + reg_CP_DIVCNT = 0x2; + reg_CP_DIV_NUMER = 0x0100000000000000; + reg_CP_DIV_DENOM = (u64)l2; + reg_CP_SQRTCNT = 0x1; + reg_CP_SQRT_PARAM = (u64)(l2 * 4); + while (reg_CP_SQRTCNT & 0x8000) {} //wait for sqrt to finish + fx32 sqrtresult = (fx32)reg_CP_SQRT_RESULT; + while (reg_CP_DIVCNT & 0x8000) {} //wait for division to finish + l2 = (fx64)reg_CP_DIV_RESULT; + l2 = sqrtresult * l2; + dst->x = (fx32)((l2 * a->x + (1LL << (0x2D - 1))) >> 0x2D); + dst->y = (fx32)((l2 * a->y + (1LL << (0x2D - 1))) >> 0x2D); + dst->z = (fx32)((l2 * a->z + (1LL << (0x2D - 1))) >> 0x2D); +} + +ARM_FUNC void VEC_Fx16Normalize(struct Vecx16 *a, struct Vecx16 *dst){ + fx64 l2 = a->x * a->x; + l2 += a->y * a->y; + l2 += a->z * a->z; + //1/sqrt(l) is computed by calculating sqrt(l)*(1/l) + reg_CP_DIVCNT = 0x2; + reg_CP_DIV_NUMER = 0x0100000000000000; + reg_CP_DIV_DENOM = (u64)l2; + reg_CP_SQRTCNT = 0x1; + reg_CP_SQRT_PARAM = (u64)(l2 * 4); + while (reg_CP_SQRTCNT & 0x8000) {} //wait for sqrt to finish + fx32 sqrtresult = (fx32)reg_CP_SQRT_RESULT; + while (reg_CP_DIVCNT & 0x8000) {} //wait for division to finish + l2 = (fx64)reg_CP_DIV_RESULT; + l2 = sqrtresult * l2; + dst->x = (fx16)((l2 * a->x + (1LL << (0x2D - 1))) >> 0x2D); + dst->y = (fx16)((l2 * a->y + (1LL << (0x2D - 1))) >> 0x2D); + dst->z = (fx16)((l2 * a->z + (1LL << (0x2D - 1))) >> 0x2D); +} + +ARM_FUNC void VEC_MultAdd(fx32 factor, struct Vecx32 *a, struct Vecx32 *b, struct Vecx32 *dst){ + dst->x = (fx32)(((fx64)factor * a->x) >> FX32_INT_SHIFT) + b->x; + dst->y = (fx32)(((fx64)factor * a->y) >> FX32_INT_SHIFT) + b->y; + dst->z = (fx32)(((fx64)factor * a->z) >> FX32_INT_SHIFT) + b->z; +} |