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define basic fixed-point arithmetic operations

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EDiasAlberto
2024-10-15 15:13:40 +01:00
parent 4e271ea5ab
commit 42b0ff9d17
1 changed files with 14 additions and 0 deletions
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14
src/threads/fixed-point.h
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@@ -6,4 +6,18 @@
#define NUM_FRAC_BITS 20 #define NUM_FRAC_BITS 20
#define CONVERSION_CONST 1 << NUM_FRAC_BITS /* f = 2^q, (2^20) */ #define CONVERSION_CONST 1 << NUM_FRAC_BITS /* f = 2^q, (2^20) */
/* Fixed Point Arithmetic conversion operations */
#define INT_TO_FP(n) ((n) * (CONVERSION_CONST))
#define FLOOR_FP_TO_INT(x) ((x) / (CONVERSION_CONST))
#define ROUNDING_FP_TO_INT(x) ((x) >= 0 ? ((x) + ((CONVERSION_CONST) / 2)) : ((x) - ((CONVERSION_CONST) / 2))
/* Fixed Point Arithmetic addition operations */
#define FP_ADD(x, y) ((x) + (y))
#define FP_SUBTRACT(x, y) ((x) - (y))
#define FP_ADD_INT(x, n) ((x) + ((n) * (CONVERSION_CONST)))
#define FP_SUBTRACT_INT(x, n) ((x) - ((n) * (CONVERSION_CONST)))
/* Fixed Point Arithmetic multiplication operations */
#endif //FIXED_POINT_H #endif //FIXED_POINT_H