ref: 3b0df0dc2a0f17bdff7b41d2b437e3e042fec1bc
dir: /tests/mathops-test.c/
#ifdef HAVE_CONFIG_H #include "config.h" #endif #include "mathops.h" #include <stdio.h> #include <math.h> #ifdef FIXED_POINT #define WORD "%d" #else #define WORD "%f" #endif #ifdef FIXED_DEBUG long long celt_mips=0; #endif int ret = 0; void testdiv(void) { celt_int32 i; for (i=1;i<=327670;i++) { double prod; celt_word32 val; val = celt_rcp(i); #ifdef FIXED_POINT prod = (1./32768./65526.)*val*i; #else prod = val*i; #endif if (fabs(prod-1) > .00025) { fprintf (stderr, "div failed: 1/%d="WORD" (product = %f)\n", i, val, prod); ret = 1; } } } void testsqrt(void) { celt_int32 i; for (i=1;i<=1000000000;i++) { double ratio; celt_word16 val; val = celt_sqrt(i); ratio = val/sqrt(i); if (fabs(ratio - 1) > .0005 && fabs(val-sqrt(i)) > 2) { fprintf (stderr, "sqrt failed: sqrt(%d)="WORD" (ratio = %f)\n", i, val, ratio); ret = 1; } i+= i>>10; } } void testrsqrt(void) { celt_int32 i; for (i=1;i<=2000000;i++) { double ratio; celt_word16 val; val = celt_rsqrt(i); ratio = val*sqrt(i)/Q15ONE; if (fabs(ratio - 1) > .05) { fprintf (stderr, "rsqrt failed: rsqrt(%d)="WORD" (ratio = %f)\n", i, val, ratio); ret = 1; } i+= i>>10; } } #ifndef FIXED_POINT void testlog2(void) { float x; for (x=0.001;x<1677700.0;x+=(x/8.0)) { float error = fabs((1.442695040888963387*log(x))-celt_log2(x)); if (error>0.0009) { fprintf (stderr, "celt_log2 failed: fabs((1.442695040888963387*log(x))-celt_log2(x))>0.001 (x = %f, error = %f)\n", x,error); ret = 1; } } } void testexp2(void) { float x; for (x=-11.0;x<24.0;x+=0.0007) { float error = fabs(x-(1.442695040888963387*log(celt_exp2(x)))); if (error>0.0002) { fprintf (stderr, "celt_exp2 failed: fabs(x-(1.442695040888963387*log(celt_exp2(x))))>0.0005 (x = %f, error = %f)\n", x,error); ret = 1; } } } void testexp2log2(void) { float x; for (x=-11.0;x<24.0;x+=0.0007) { float error = fabs(x-(celt_log2(celt_exp2(x)))); if (error>0.001) { fprintf (stderr, "celt_log2/celt_exp2 failed: fabs(x-(celt_log2(celt_exp2(x))))>0.001 (x = %f, error = %f)\n", x,error); ret = 1; } } } #else void testlog2(void) { celt_word32 x; for (x=8;x<1073741824;x+=(x>>3)) { float error = fabs((1.442695040888963387*log(x/16384.0))-celt_log2(x)/1024.0); if (error>0.003) { fprintf (stderr, "celt_log2 failed: x = %ld, error = %f\n", (long)x,error); ret = 1; } } } void testexp2(void) { celt_word16 x; for (x=-32768;x<-30720;x++) { float error1 = fabs(x/2048.0-(1.442695040888963387*log(celt_exp2(x)/65536.0))); float error2 = fabs(exp(0.6931471805599453094*x/2048.0)-celt_exp2(x)/65536.0); if (error1>0.0002&&error2>0.00004) { fprintf (stderr, "celt_exp2 failed: x = "WORD", error1 = %f, error2 = %f\n", x,error1,error2); ret = 1; } } } void testexp2log2(void) { celt_word32 x; for (x=8;x<65536;x+=(x>>3)) { float error = fabs(x-0.25*celt_exp2(celt_log2(x)<<1))/16384; if (error>0.004) { fprintf (stderr, "celt_log2/celt_exp2 failed: fabs(x-(celt_exp2(celt_log2(x))))>0.001 (x = %ld, error = %f)\n", (long)x,error); ret = 1; } } } void testilog2(void) { celt_word32 x; for (x=1;x<=268435455;x+=127) { celt_word32 error = abs(celt_ilog2(x)-(int)floor(log2(x))); if (error!=0) { printf("celt_ilog2 failed: celt_ilog2(x)!=floor(log2(x)) (x = %d, error = %d)\n",x,error); ret = 1; } } } #endif int main(void) { testdiv(); testsqrt(); testrsqrt(); testlog2(); testexp2(); testexp2log2(); #ifdef FIXED_POINT testilog2(); #endif return ret; }