Macros
#define	VISUAL_MATH_PI 3.141592653589793238462643383279502884197169399f

Functions
int	visual_math_is_power_of_2 (int n)
	Checks if the given value is a power of 2. More...

unsigned int	visual_math_round_power_of_2 (unsigned int n)
	Rounds up to the next highest power of 2. More...

void	visual_math_simd_mul_floats_float (float LV_RESTRICT dest, const float LV_RESTRICT src, float k, visual_size_t count)
	Multiplies an array of floats with a constant multiplicand, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_add_floats_float (float LV_RESTRICT dest, const float LV_RESTRICT src, float k, visual_size_t count)
	Adds an array of floats with a constant addend, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_mul_floats_floats (float LV_RESTRICT dest, const float LV_RESTRICT src1, const float *LV_RESTRICT src2, visual_size_t count)

void	visual_math_simd_floats_to_int32s (int32_t LV_RESTRICT ints, const float LV_RESTRICT flts, visual_size_t count)
	Converts an array of floats to 32-bit integers, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_int32s_to_floats (float LV_RESTRICT flts, const int32_t LV_RESTRICT ints, visual_size_t count)
	Converts an array of integers to floats, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_floats_to_int32s_mul_float (int32_t LV_RESTRICT ints, const float LV_RESTRICT flts, float k, visual_size_t count)
	Converts an array of floats to integers and multiplies it with a const multiplicand, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_int32s_to_floats_mul_float (float LV_RESTRICT flts, const int32_t LV_RESTRICT ints, float k, visual_size_t count)
	Converts an array of integers to floats and multiplies it with a const multiplier. More...

void	visual_math_simd_denorm_floats_to_int32s (int32_t LV_RESTRICT ints, const float LV_RESTRICT flts, float k, visual_size_t count)
	Denormalizes an array of floats, each in [0.0, 1.0], to integers, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_denorm_neg_floats_to_int32s (int32_t LV_RESTRICT ints, const float LV_RESTRICT flts, float k, visual_size_t count)
	Denormalizes an array of floats, each in [-1.0, 1.0], to integers, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_sqrt_floats (float LV_RESTRICT dest, const float LV_RESTRICT src, visual_size_t count)
	Calculates the square root of each float element in the input array, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_complex_norm (float LV_RESTRICT dest, const float LV_RESTRICT real, const float *LV_RESTRICT imag, visual_size_t count)
	Calculates the norm of a list of complex numbers, using SIMD instructions on supported CPUs. More...

void	visual_math_simd_complex_scaled_norm (float LV_RESTRICT dest, const float LV_RESTRICT real, const float *LV_RESTRICT imag, float k, visual_size_t count)
	Calculates the scaled norm of a list of complex numbers, using SIMD instructions on supported CPUs. More...

Detailed Description

Function Documentation

int visual_math_is_power_of_2 ( int n )

Checks if the given value is a power of 2.

Parameters

n	Value to be checked if it's being a power of 2.

Returns: TRUE if power of 2, FALSE if not.

Definition at line 30 of file lv_math.c.

unsigned int visual_math_round_power_of_2 ( unsigned int n )

Rounds up to the next highest power of 2.

Parameters

n	Value to round up

Returns: Next highest power of 2

Definition at line 35 of file lv_math.c.

void visual_math_simd_add_floats_float	(	float *LV_RESTRICT	dest,
		const float *LV_RESTRICT	src,
		float	k,
		visual_size_t	count
	)

Adds an array of floats with a constant addend, using SIMD instructions on supported CPUs.

Note: Destination and source may be the same.

Parameters

dest	pointer to the destination float array
src	pointer to the source float array
k	constant addend
count	number of elements

Definition at line 56 of file lv_math.c.

void visual_math_simd_complex_norm	(	float *LV_RESTRICT	dest,
		const float *LV_RESTRICT	real,
		const float *LV_RESTRICT	imag,
		visual_size_t	count
	)

Calculates the norm of a list of complex numbers, using SIMD instructions on supported CPUs.

The real and imaginary parts are given in two separate arrays.

Parameters

dest	array to hold the results in
real	array of real parts
imag	array of imaginary parts
count	number of elements

Definition at line 101 of file lv_math.c.

void visual_math_simd_complex_scaled_norm	(	float *LV_RESTRICT	dest,
		const float *LV_RESTRICT	real,
		const float *LV_RESTRICT	imag,
		float	k,
		visual_size_t	count
	)

Calculates the scaled norm of a list of complex numbers, using SIMD instructions on supported CPUs.

The real and imaginary parts are given in two separate arrays.

Parameters

dest	array to hold the results in
real	array of real parts
imag	array of imaginary parts
k	const multiplcand
count	number of elements

Definition at line 106 of file lv_math.c.

Referenced by LV::DFT::perform().

void visual_math_simd_denorm_floats_to_int32s	(	int32_t *LV_RESTRICT	ints,
		const float *LV_RESTRICT	flts,
		float	k,
		visual_size_t	count
	)

Denormalizes an array of floats, each in [0.0, 1.0], to integers, using SIMD instructions on supported CPUs.

Each float value is first clamped to [0.0, 1.0], and then scaled to [0.0, k]

Parameters

ints	pointer to the destination int32_t array.
flts	pointer to the source float array.
k	constant multiplicand
count	number of elements

Definition at line 86 of file lv_math.c.

Referenced by LV::Rect::denormalize_points().

void visual_math_simd_denorm_neg_floats_to_int32s	(	int32_t *LV_RESTRICT	ints,
		const float *LV_RESTRICT	flts,
		float	k,
		visual_size_t	count
	)

Denormalizes an array of floats, each in [-1.0, 1.0], to integers, using SIMD instructions on supported CPUs.

Each float value is first clamped to [-1.0, 1.0], and then scaled to [0.0, k].

See Also: visual_math_simd_denorm_floats_to_int32()

Parameters

ints	pointer to the destination int32_t array.
flts	pointer to the source float array.
k	constant multiplicand
count	number of elements

Definition at line 91 of file lv_math.c.

Referenced by LV::Rect::denormalize_points_neg().

void visual_math_simd_floats_to_int32s	(	int32_t *LV_RESTRICT	ints,
		const float *LV_RESTRICT	flts,
		visual_size_t	count
	)

Converts an array of floats to 32-bit integers, using SIMD instructions on supported CPUs.

Parameters

ints	pointer to the destination int32_t array
flts	pointer to the source float array
count	number of elements

Definition at line 66 of file lv_math.c.

void visual_math_simd_floats_to_int32s_mul_float	(	int32_t *LV_RESTRICT	ints,
		const float *LV_RESTRICT	flts,
		float	k,
		visual_size_t	count
	)

Converts an array of floats to integers and multiplies it with a const multiplicand, using SIMD instructions on supported CPUs.

Parameters

ints	pointer to the destination int32_t array
flts	pointer to the source float array
k	constant multiplicand
count	number of elements

Definition at line 76 of file lv_math.c.

void visual_math_simd_int32s_to_floats	(	float *LV_RESTRICT	flts,
		const int32_t *LV_RESTRICT	ints,
		visual_size_t	count
	)

Converts an array of integers to floats, using SIMD instructions on supported CPUs.

Parameters

flts	pointer to the destination float array
ints	pointer to the source int32_t array
count	number of elements

Definition at line 71 of file lv_math.c.

void visual_math_simd_int32s_to_floats_mul_float	(	float *LV_RESTRICT	flts,
		const int32_t *LV_RESTRICT	ints,
		float	k,
		visual_size_t	count
	)

Converts an array of integers to floats and multiplies it with a const multiplier.

Parameters

flts	pointer to the destination float array.
ints	pointer to the source int32_t array.
k	constant multiplicand
count	number of elements

Definition at line 81 of file lv_math.c.

void visual_math_simd_mul_floats_float	(	float *LV_RESTRICT	dest,
		const float *LV_RESTRICT	src,
		float	k,
		visual_size_t	count
	)

Multiplies an array of floats with a constant multiplicand, using SIMD instructions on supported CPUs.

Note: Destination and source maty be the same.

Parameters

dest	pointer to the destination float array
src	pointer to the source float array
k	constant multiplicand
count	number of elements

Definition at line 51 of file lv_math.c.

void visual_math_simd_sqrt_floats	(	float *LV_RESTRICT	dest,
		const float *LV_RESTRICT	src,
		visual_size_t	count
	)

Calculates the square root of each float element in the input array, using SIMD instructions on supported CPUs.

Note: This function works best with data sizes larger than 16 or equal to 16.

Parameters

dest	array to hold the results in
src	array of floats
count	number of elements

Definition at line 96 of file lv_math.c.

Macros

Functions

Detailed Description

Function Documentation