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.
109  * result = -arg
115 	res.value = -arg.value;  in dc_fixpt_neg()
122  * result = abs(arg) := (arg >= 0) ? arg : -arg
235 		arg.value = -arg.value;  in dc_fixpt_shr()
238 		arg.value = -arg.value;  in dc_fixpt_shr()
255 	ASSERT(((arg1.value >= 0) && (LLONG_MAX - arg1.value >= arg2.value)) ||  in dc_fixpt_add()
256 		((arg1.value < 0) && (LLONG_MIN - arg1.value <= arg2.value)));  in dc_fixpt_add()
274  * result = arg1 - arg2
283 	res.value = arg1.value - arg2.value;  in dc_fixpt_sub()
290  * result = arg1 - arg2
368  * internally it's normalized to [-2pi...2pi] range.
378  * internally it's normalized to [-2pi...2pi] range.
388  * and should be in [-2pi...2pi] range -
389  * passing arguments outside that range
404  * Currently, function is verified for abs(arg) <= 1.
413  * Currently, abs(arg) should be less than 1.
430  * Currently, abs(arg1) should be less than 1. Take care!
454 	unsigned long long arg_value = arg.value > 0 ? arg.value : -arg.value;  in dc_fixpt_floor()
459 		return -(int)(arg_value >> FIXED31_32_BITS_PER_FRACTIONAL_PART);  in dc_fixpt_floor()
468 	unsigned long long arg_value = arg.value > 0 ? arg.value : -arg.value;  in dc_fixpt_round()
472 	ASSERT(LLONG_MAX - (long long)arg_value >= summand);  in dc_fixpt_round()
479 		return -(int)(arg_value >> FIXED31_32_BITS_PER_FRACTIONAL_PART);  in dc_fixpt_round()
488 	unsigned long long arg_value = arg.value > 0 ? arg.value : -arg.value;  in dc_fixpt_ceil()
490 	const long long summand = dc_fixpt_one.value -  in dc_fixpt_ceil()
493 	ASSERT(LLONG_MAX - (long long)arg_value >= summand);  in dc_fixpt_ceil()
500 		return -(int)(arg_value >> FIXED31_32_BITS_PER_FRACTIONAL_PART);  in dc_fixpt_ceil()
533 		arg.value = -arg.value;  in dc_fixpt_truncate()
534 	arg.value &= (~0LL) << (FIXED31_32_BITS_PER_FRACTIONAL_PART - frac_bits);  in dc_fixpt_truncate()
536 		arg.value = -arg.value;  in dc_fixpt_truncate()