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sigproc: Make convolution and convert input buffers immutable

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For good practice, use const specifier when applicable.

Signed-off-by: Tom Tsou <tom@tsou.cc>
fairwaves/no-demod
Tom Tsou 8 years ago committed by Tom Tsou
parent d4d3daa12e
commit f147b17447
5 changed files with 68 additions and 55 deletions
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4
Transceiver52M/common/convert.h
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@ -1,7 +1,7 @@
#ifndef _CONVERT_H_
#define _CONVERT_H_
void convert_float_short(short *out, float *in, float scale, int len);
void convert_short_float(float *out, short *in, int len);
void convert_float_short(short *out, const float *in, float scale, int len);
void convert_short_float(float *out, const short *in, int len);
#endif /* _CONVERT_H_ */

16
Transceiver52M/common/convolve.h
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@ -3,26 +3,26 @@
void *convolve_h_alloc(int num);
int convolve_real(float *x, int x_len,
float *h, int h_len,
int convolve_real(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset);
int convolve_complex(float *x, int x_len,
float *h, int h_len,
int convolve_complex(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset);
int base_convolve_real(float *x, int x_len,
float *h, int h_len,
int base_convolve_real(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset);
int base_convolve_complex(float *x, int x_len,
float *h, int h_len,
int base_convolve_complex(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset);

24
Transceiver52M/common/convolve_base.c
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@ -26,21 +26,21 @@
#endif
/* Base multiply and accumulate complex-real */
static void mac_real(float *x, float *h, float *y)
static void mac_real(const float *x, const float *h, float *y)
{
y[0] += x[0] * h[0];
y[1] += x[1] * h[0];
}
/* Base multiply and accumulate complex-complex */
static void mac_cmplx(float *x, float *h, float *y)
static void mac_cmplx(const float *x, const float *h, float *y)
{
y[0] += x[0] * h[0] - x[1] * h[1];
y[1] += x[0] * h[1] + x[1] * h[0];
}
/* Base vector complex-complex multiply and accumulate */
static void mac_real_vec_n(float *x, float *h, float *y,
static void mac_real_vec_n(const float *x, const float *h, float *y,
int len, int step, int offset)
{
for (int i = offset; i < len; i += step)
@ -48,7 +48,7 @@ static void mac_real_vec_n(float *x, float *h, float *y,
}
/* Base vector complex-complex multiply and accumulate */
static void mac_cmplx_vec_n(float *x, float *h, float *y,
static void mac_cmplx_vec_n(const float *x, const float *h, float *y,
int len, int step, int offset)
{
for (int i = offset; i < len; i += step)
@ -56,8 +56,8 @@ static void mac_cmplx_vec_n(float *x, float *h, float *y,
}
/* Base complex-real convolution */
int _base_convolve_real(float *x, int x_len,
float *h, int h_len,
int _base_convolve_real(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset)
@ -73,8 +73,8 @@ int _base_convolve_real(float *x, int x_len,
}
/* Base complex-complex convolution */
int _base_convolve_complex(float *x, int x_len,
float *h, int h_len,
int _base_convolve_complex(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset)
@ -110,8 +110,8 @@ int bounds_check(int x_len, int h_len, int y_len,
}
/* API: Non-aligned (no SSE) complex-real */
int base_convolve_real(float *x, int x_len,
float *h, int h_len,
int base_convolve_real(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset)
@ -128,8 +128,8 @@ int base_convolve_real(float *x, int x_len,
}
/* API: Non-aligned (no SSE) complex-complex */
int base_convolve_complex(float *x, int x_len,
float *h, int h_len,
int base_convolve_complex(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset)

19
Transceiver52M/x86/convert.c
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@ -34,7 +34,7 @@
/* 16*N 16-bit signed integer converted to single precision floats */
static void _sse_convert_si16_ps_16n(float *restrict out,
short *restrict in,
const short *restrict in,
int len)
{
__m128i m0, m1, m2, m3, m4, m5;
@ -69,7 +69,7 @@ static void _sse_convert_si16_ps_16n(float *restrict out,
/* 16*N 16-bit signed integer conversion with remainder */
static void _sse_convert_si16_ps(float *restrict out,
short *restrict in,
const short *restrict in,
int len)
{
int start = len / 16 * 16;
@ -83,7 +83,7 @@ static void _sse_convert_si16_ps(float *restrict out,
/* 8*N single precision floats scaled and converted to 16-bit signed integer */
static void _sse_convert_scale_ps_si16_8n(short *restrict out,
float *restrict in,
const float *restrict in,
float scale, int len)
{
__m128 m0, m1, m2;
@ -111,7 +111,7 @@ static void _sse_convert_scale_ps_si16_8n(short *restrict out,
/* 8*N single precision floats scaled and converted with remainder */
static void _sse_convert_scale_ps_si16(short *restrict out,
float *restrict in,
const float *restrict in,
float scale, int len)
{
int start = len / 8 * 8;
@ -124,7 +124,7 @@ static void _sse_convert_scale_ps_si16(short *restrict out,
/* 16*N single precision floats scaled and converted to 16-bit signed integer */
static void _sse_convert_scale_ps_si16_16n(short *restrict out,
float *restrict in,
const float *restrict in,
float scale, int len)
{
__m128 m0, m1, m2, m3, m4;
@ -158,7 +158,8 @@ static void _sse_convert_scale_ps_si16_16n(short *restrict out,
}
}
#else /* HAVE_SSE3 */
static void convert_scale_ps_si16(short *out, float *in, float scale, int len)
static void convert_scale_ps_si16(short *out, const float *in,
float scale, int len)
{
for (int i = 0; i < len; i++)
out[i] = in[i] * scale;
@ -166,14 +167,14 @@ static void convert_scale_ps_si16(short *out, float *in, float scale, int len)
#endif
#ifndef HAVE_SSE4_1
static void convert_si16_ps(float *out, short *in, int len)
static void convert_si16_ps(float *out, const short *in, int len)
{
for (int i = 0; i < len; i++)
out[i] = in[i];
}
#endif
void convert_float_short(short *out, float *in, float scale, int len)
void convert_float_short(short *out, const float *in, float scale, int len)
{
#ifdef HAVE_SSE3
if (!(len % 16))
@ -187,7 +188,7 @@ void convert_float_short(short *out, float *in, float scale, int len)
#endif
}
void convert_short_float(float *out, short *in, int len)
void convert_short_float(float *out, const short *in, int len)
{
#ifdef HAVE_SSE4_1
if (!(len % 16))

60
Transceiver52M/x86/convolve.c
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@ -27,14 +27,14 @@
#endif
/* Forward declarations from base implementation */
int _base_convolve_real(float *x, int x_len,
float *h, int h_len,
int _base_convolve_real(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset);
int _base_convolve_complex(float *x, int x_len,
float *h, int h_len,
int _base_convolve_complex(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset);
@ -47,8 +47,8 @@ int bounds_check(int x_len, int h_len, int y_len,
#include <pmmintrin.h>
/* 4-tap SSE complex-real convolution */
static void sse_conv_real4(float *restrict x,
float *restrict h,
static void sse_conv_real4(const float *restrict x,
const float *restrict h,
float *restrict y,
int len)
{
@ -81,8 +81,8 @@ static void sse_conv_real4(float *restrict x,
}
/* 8-tap SSE complex-real convolution */
static void sse_conv_real8(float *restrict x,
float *restrict h,
static void sse_conv_real8(const float *restrict x,
const float *restrict h,
float *restrict y,
int len)
{
@ -128,8 +128,8 @@ static void sse_conv_real8(float *restrict x,
}
/* 12-tap SSE complex-real convolution */
static void sse_conv_real12(float *restrict x,
float *restrict h,
static void sse_conv_real12(const float *restrict x,
const float *restrict h,
float *restrict y,
int len)
{
@ -190,8 +190,8 @@ static void sse_conv_real12(float *restrict x,
}
/* 16-tap SSE complex-real convolution */
static void sse_conv_real16(float *restrict x,
float *restrict h,
static void sse_conv_real16(const float *restrict x,
const float *restrict h,
float *restrict y,
int len)
{
@ -265,8 +265,8 @@ static void sse_conv_real16(float *restrict x,
}
/* 20-tap SSE complex-real convolution */
static void sse_conv_real20(float *restrict x,
float *restrict h,
static void sse_conv_real20(const float *restrict x,
const float *restrict h,
float *restrict y,
int len)
{
@ -351,7 +351,10 @@ static void sse_conv_real20(float *restrict x,
}
/* 4*N-tap SSE complex-real convolution */
static void sse_conv_real4n(float *x, float *h, float *y, int h_len, int len)
static void sse_conv_real4n(const float *x,
const float *h,
float *y,
int h_len, int len)
{
__m128 m0, m1, m2, m4, m5, m6, m7;
@ -391,7 +394,10 @@ static void sse_conv_real4n(float *x, float *h, float *y, int h_len, int len)
}
/* 4*N-tap SSE complex-complex convolution */
static void sse_conv_cmplx_4n(float *x, float *h, float *y, int h_len, int len)
static void sse_conv_cmplx_4n(const float *x,
const float *h,
float *y,
int h_len, int len)
{
__m128 m0, m1, m2, m3, m4, m5, m6, m7;
@ -439,7 +445,10 @@ static void sse_conv_cmplx_4n(float *x, float *h, float *y, int h_len, int len)
}
/* 8*N-tap SSE complex-complex convolution */
static void sse_conv_cmplx_8n(float *x, float *h, float *y, int h_len, int len)
static void sse_conv_cmplx_8n(const float *x,
const float *h,
float *y,
int h_len, int len)
{
__m128 m0, m1, m2, m3, m4, m5, m6, m7;
__m128 m8, m9, m10, m11, m12, m13, m14, m15;
@ -511,14 +520,16 @@ static void sse_conv_cmplx_8n(float *x, float *h, float *y, int h_len, int len)
#endif
/* API: Aligned complex-real */
int convolve_real(float *x, int x_len,
float *h, int h_len,
int convolve_real(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset)
{
void (*conv_func)(float *, float *, float *, int) = NULL;
void (*conv_func_n)(float *, float *, float *, int, int) = NULL;
void (*conv_func)(const float *, const float *,
float *, int) = NULL;
void (*conv_func_n)(const float *, const float *,
float *, int, int) = NULL;
if (bounds_check(x_len, h_len, y_len, start, len, step) < 0)
return -1;
@ -566,13 +577,14 @@ int convolve_real(float *x, int x_len,
}
/* API: Aligned complex-complex */
int convolve_complex(float *x, int x_len,
float *h, int h_len,
int convolve_complex(const float *x, int x_len,
const float *h, int h_len,
float *y, int y_len,
int start, int len,
int step, int offset)
{
void (*conv_func)(float *, float *, float *, int, int) = NULL;
void (*conv_func)(const float *, const float *,
float *, int, int) = NULL;
if (bounds_check(x_len, h_len, y_len, start, len, step) < 0)
return -1;

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