diff options
Diffstat (limited to 'arm9/lib/include/fx.h')
| -rw-r--r-- | arm9/lib/include/fx.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arm9/lib/include/fx.h b/arm9/lib/include/fx.h index b1c3aa88..e0ba52f3 100644 --- a/arm9/lib/include/fx.h +++ b/arm9/lib/include/fx.h @@ -46,10 +46,14 @@ typedef s64 fx64c; #define FX64C_INT_ABS(x) FX_INT_ABS(FX64C, x) #define FX64C_FRAC(x) FX_FRAC(FX64C, x) -#define FX32_MUL(a, b) ((fx32)(((fx64)a * b) >> FX32_INT_SHIFT)) -#define FX32_MUL_ADD_MUL(a, b, c, d) ((fx32)(((fx64)a * b + (fx64)c * d) >> FX32_INT_SHIFT)) +//TODO: clean up these macros +#define FX32_MUL_NO_ROUND(a, b) ((fx32)(((fx64)(a) * (b)) >> FX32_INT_SHIFT)) +#define FX32_MUL(a, b) ((fx32)((((fx64)(a) * (b) + (1 << (FX32_INT_SHIFT - 1))) >> FX32_INT_SHIFT))) +#define FX32_MUL_ADD_MUL(a, b, c, d) ((fx32)(((fx64)(a) * (b) + (fx64)c * d) >> FX32_INT_SHIFT)) //the extra term here is for rounding -#define FX32_MUL_SUB_MUL(a, b, c, d) ((fx32)(((fx64)a * b - (fx64)c * d + (1 << (FX32_INT_SHIFT - 1))) >> FX32_INT_SHIFT)) +#define FX32_MUL_SUB_MUL(a, b, c, d) ((fx32)(((fx64)(a) * (b) - (fx64)c * d + (1 << (FX32_INT_SHIFT - 1))) >> FX32_INT_SHIFT)) + +#define FX_MUL_FX32_FX64C(a, b) ((fx32)((((a) * (b) + ((fx64)1 << (FX64C_INT_SHIFT - 1))) >> FX64C_INT_SHIFT))) struct Vecx32 { |