display/include/fixed31_32.h

2  * Copyright 2012-15 Advanced Micro Devices, Inc.
33 #define LLONG_MIN (-LLONG_MAX - 1ll)
41 #define LLONG_MAX (-1LL>>1)
47  * represented as fixed-point numbers.
103  * result = -arg
109 	res.value = -arg.value;  in dc_fixpt_neg()
116  * result = abs(arg) := (arg >= 0) ? arg : -arg
229 		arg.value = -arg.value;  in dc_fixpt_shr()
232 		arg.value = -arg.value;  in dc_fixpt_shr()
249 	ASSERT(((arg1.value >= 0) && (LLONG_MAX - arg1.value >= arg2.value)) ||  in dc_fixpt_add()
250 		((arg1.value < 0) && (LLONG_MIN - arg1.value <= arg2.value)));  in dc_fixpt_add()
268  * result = arg1 - arg2
277 	res.value = arg1.value - arg2.value;  in dc_fixpt_sub()
284  * result = arg1 - arg2
362  * internally it's normalized to [-2pi...2pi] range.
372  * internally it's normalized to [-2pi...2pi] range.
382  * and should be in [-2pi...2pi] range -
383  * passing arguments outside that range
398  * Currently, function is verified for abs(arg) <= 1.
407  * Currently, abs(arg) should be less than 1.
424  * Currently, abs(arg1) should be less than 1. Take care!
448 	unsigned long long arg_value = arg.value > 0 ? arg.value : -arg.value;  in dc_fixpt_floor()
453 		return -(int)(arg_value >> FIXED31_32_BITS_PER_FRACTIONAL_PART);  in dc_fixpt_floor()
462 	unsigned long long arg_value = arg.value > 0 ? arg.value : -arg.value;  in dc_fixpt_round()
466 	ASSERT(LLONG_MAX - (long long)arg_value >= summand);  in dc_fixpt_round()
473 		return -(int)(arg_value >> FIXED31_32_BITS_PER_FRACTIONAL_PART);  in dc_fixpt_round()
482 	unsigned long long arg_value = arg.value > 0 ? arg.value : -arg.value;  in dc_fixpt_ceil()
484 	const long long summand = dc_fixpt_one.value -  in dc_fixpt_ceil()
487 	ASSERT(LLONG_MAX - (long long)arg_value >= summand);  in dc_fixpt_ceil()
494 		return -(int)(arg_value >> FIXED31_32_BITS_PER_FRACTIONAL_PART);  in dc_fixpt_ceil()
527 		arg.value = -arg.value;  in dc_fixpt_truncate()
528 	arg.value &= (~0ULL) << (FIXED31_32_BITS_PER_FRACTIONAL_PART - frac_bits);  in dc_fixpt_truncate()
530 		arg.value = -arg.value;  in dc_fixpt_truncate()