#include <stdio.h>

 #include <assert.h>

 #include <math.h>

 #define write_string(x) printf(x)

 #define write_int(x) printf( "%08X", x )

 int do_fsca(int angle, float *a, float *b);

 float do_fsrra( float param );

 float do_fipr( float *vectora, float *vectorb );

 float do_fipr2( float *vectora, float *vectorb );

 void do_ftrv( float *matrix, float *vector );

 void do_ftrv2( float *matrix, float *vector );

 unsigned int get_fpscr();

 void set_fpscr( unsigned int fpscr );

 #define MAX_FLOAT_DIFF 0.00001

 int compare_float( float a, float b )

 {

     if( a == b )

 	return 1;

     float diff = (a>b?(a-b):(b-a));

     return diff < MAX_FLOAT_DIFF;

 }

 #define TEST_FEQUALS( a, b ) if( !compare_float(a,b) ) { printf( "Assertion failed at %s.%d: expected %.8f but was %.8f\n", __FILE__, __LINE__, a, b ); return 1; }

 int test_fsca( int angle, float expect_a, float expect_b )

 {

     float a = 10.0;

     float b = 10.0;

     do_fsca(angle, &a, &b );

     TEST_FEQUALS(expect_a, a);

     TEST_FEQUALS(expect_b, b);

 }

 int test_fsrra( float f, float expect )

 {

     float f2 = do_fsrra( f );

     TEST_FEQUALS( expect, f2 );

 }

 void test_coercion( float f )

 {

     double d = (double)f;

     float q = (float)d;

     unsigned int i = (unsigned int)d;

     signed int j = (signed int)q;

     printf( "Coerce: %08X %08X%08X %08X %08X %08X\n", *((unsigned int *)&f),

     	    *((unsigned int *)&d),  *(((unsigned int *)&d)+1),

     	    *((unsigned int *)&q), i, j );

 }

 void test_doublearr( int len )

 {

     double arr[len];

     unsigned int *iarr = (unsigned int *)&arr;

     int i;

     arr[0] = 2.5;

     for( i=1; i<len; i++ ) {

 	arr[i] = (arr[i-1] * arr[i-1] + arr[0]) / 1.25 - 0.19;

     }

     printf( "arr: " );

     for( i=0; i<len; i++ ) {

 	printf( "%08X", *iarr++ );

 	printf( "%08X ", *iarr++ );

     }

     printf( "\n" );

 }

 void test_floatarr( int len )

 {

     float arr[len];

     unsigned int *iarr = (unsigned int *)&arr;

     int i;

     arr[0] = 2.5;

     for( i=1; i<len; i++ ) {

 	arr[i] = (arr[i-1] * arr[i-1] + arr[0]) / 1.25 - 0.19;

     }

     write_string( "arr: " );

     for( i=0; i<len; i++ ) {

 	write_int( *iarr++ );

 	write_string( " " );

     }

     write_string( "\n" );

 }

 float __attribute__((aligned(8))) matrix[16] = { 1.26, 2.34, 5.67, 3.497, -1.23, 43.43, -45.68, 9.12, 

 			 12.1, 34.301, -297.354, 0.05, 0.123, 23.34, 9.99, 33.321 };

 float __attribute__((aligned(8))) vec1[4] = { 5.65, 9.98, -34.12, 0.043 };

 float __attribute__((aligned(8))) vec2[4] = { 3.45, -123, 4.54, 98.0909 };

 float __attribute__((aligned(8))) vec3[4] = { 1.25, 2.25, 3.75, 5.12 };

 float __attribute__((aligned(8))) vec4[4] = {-0.25, 8.9, -2.3, 9.19 };

 void test_fipr( )

 {

     float r = do_fipr( vec3, vec4 );

     write_string( "fipr: " );

     write_int( *(unsigned int *)&r );

     write_string( "\n" );

     r = do_fipr2( vec4, vec3 );

     write_string( "fipr: " );

     write_int( *(unsigned int *)&r );

     write_string( "\n" );

 }

 void test_ftrv( )

 {

     do_ftrv( matrix, vec1 );

     write_string( "ftrv: " );

     write_int( *(unsigned int *)&vec1[0] );

     write_int( *(unsigned int *)&vec1[1] );

     write_int( *(unsigned int *)&vec1[2] );

     write_int( *(unsigned int *)&vec1[3] );

     write_string( "\n" );

     do_ftrv2( matrix, vec2 );

     write_string( "ftrv: " );

     write_int( *(unsigned int *)&vec2[0] );

     write_int( *(unsigned int *)&vec2[1] );

     write_int( *(unsigned int *)&vec2[2] );

     write_int( *(unsigned int *)&vec2[3] );

     write_string( "\n" );

 }

 int main()

 {

 	write_int( get_fpscr() );

 	write_string( "\n" );

 	test_fsca( 0x00000000, 0, 1 );

 	test_fsca( 0x00011234, 0.43205646, 0.90184659 );

 	test_fsca( 0xFEDCBA98, -0.99121743, -0.13224234 );

 	test_fsrra( 25.0, 0.2 );

 	test_fsrra( 0.05, 4.4721361 );

 	test_fsrra( -12.345, nanf() );

 	test_coercion( -3.1415926 );

 	test_coercion( 123456789012346567.890 );

 	test_coercion( -2147483648.0 );

 	test_coercion( 5234.1234 );

 	test_doublearr( 5 );

 	test_floatarr( 5 );

 	test_fipr();

 	test_ftrv();

 	return 1;

 }