lxdream 0.9.1| filename | test/testmath.c |
| changeset | 192:580d6c4d7802 |
| prev | 185:6755a04c447f |
| author | nkeynes |
| date | Sat Aug 05 00:18:21 2006 +0000 (17 years ago) |
| permissions | -rw-r--r-- |
| last change | Add error lines to tests with incomplete polys Split clip tests to separate data file Add tests for cmd bit 23 ("use list size field") |
| view | annotate | diff | log | raw |
1 #include <stdio.h>
2 #include <assert.h>
3 #include <math.h>
5 #define write_string(x) printf(x)
6 #define write_int(x) printf( "%08X", x )
8 int do_fsca(int angle, float *a, float *b);
9 float do_fsrra( float param );
10 float do_fipr( float *vectora, float *vectorb );
11 float do_fipr2( float *vectora, float *vectorb );
12 void do_ftrv( float *matrix, float *vector );
13 void do_ftrv2( float *matrix, float *vector );
15 unsigned int get_fpscr();
16 void set_fpscr( unsigned int fpscr );
18 #define MAX_FLOAT_DIFF 0.00001
20 static inline float inttof( unsigned int i )
21 {
22 return *((float *)&i);
23 }
25 static inline double longtod( unsigned long long l )
26 {
27 return *((double *)&l);
28 }
30 static inline unsigned int ftoint( float f )
31 {
32 return *((unsigned int *)&f);
33 }
35 static inline unsigned long long dtolong( double d )
36 {
37 return *((unsigned long long *)&d);
38 }
40 #define QNANF inttof(0x7FBFFFFF)
41 #define QNAND longtod(0x7FF7FFFFFFFFFFFFLL)
43 int compare_float( float a, float b )
44 {
45 if( ftoint(a) == ftoint(b) ) /* Exact bit-pattern match */
46 return 1;
47 float diff = (a>b?(a-b):(b-a));
48 return diff < MAX_FLOAT_DIFF;
49 }
51 #define FTOINT(a) (*((unsigned int *)&a))
53 #define TEST_FEQUALS( a, b ) if( !compare_float(a,b) ) { printf( "Assertion failed at %s.%d: expected %.8f (%08X) but was %.8f (%08X)\n", __FILE__, __LINE__, a, FTOINT(a), b, FTOINT(b) ); return 1; }
55 int test_fsca( int angle, float expect_a, float expect_b )
56 {
57 float a = 10.0;
58 float b = 10.0;
59 do_fsca(angle, &a, &b );
61 TEST_FEQUALS(expect_a, a);
62 TEST_FEQUALS(expect_b, b);
63 }
65 int test_fsrra( float f, float expect )
66 {
67 float f2 = do_fsrra( f );
68 TEST_FEQUALS( expect, f2 );
69 }
71 void test_coercion( float f )
72 {
73 double d = (double)f;
74 float q = (float)d;
75 unsigned int i = (unsigned int)d;
76 signed int j = (signed int)q;
78 printf( "Coerce: %08X %08X%08X %08X %08X %08X\n", *((unsigned int *)&f),
79 *((unsigned int *)&d), *(((unsigned int *)&d)+1),
80 *((unsigned int *)&q), i, j );
81 }
83 void test_doublearr( int len )
84 {
85 double arr[len];
86 unsigned int *iarr = (unsigned int *)&arr;
87 int i;
88 arr[0] = 2.5;
89 for( i=1; i<len; i++ ) {
90 arr[i] = (arr[i-1] * arr[i-1] + arr[0]) / 1.25 - 0.19;
91 }
93 printf( "arr: " );
94 for( i=0; i<len; i++ ) {
95 printf( "%08X", *iarr++ );
96 printf( "%08X ", *iarr++ );
97 }
98 printf( "\n" );
99 }
101 void test_floatarr( int len )
102 {
103 float arr[len];
104 unsigned int *iarr = (unsigned int *)&arr;
105 int i;
106 arr[0] = 2.5;
107 for( i=1; i<len; i++ ) {
108 arr[i] = (arr[i-1] * arr[i-1] + arr[0]) / 1.25 - 0.19;
109 }
111 write_string( "arr: " );
112 for( i=0; i<len; i++ ) {
113 write_int( *iarr++ );
114 write_string( " " );
115 }
116 write_string( "\n" );
117 }
119 float __attribute__((aligned(8))) matrix[16] = { 1.26, 2.34, 5.67, 3.497, -1.23, 43.43, -45.68, 9.12,
120 12.1, 34.301, -297.354, 0.05, 0.123, 23.34, 9.99, 33.321 };
121 float __attribute__((aligned(8))) vec1[4] = { 5.65, 9.98, -34.12, 0.043 };
122 float __attribute__((aligned(8))) vec2[4] = { 3.45, -123, 4.54, 98.0909 };
123 float __attribute__((aligned(8))) vec3[4] = { 1.25, 2.25, 3.75, 5.12 };
124 float __attribute__((aligned(8))) vec4[4] = {-0.25, 8.9, -2.3, 9.19 };
126 void test_fipr( )
127 {
128 float r = do_fipr( vec3, vec4 );
129 write_string( "fipr: " );
130 write_int( *(unsigned int *)&r );
131 write_string( "\n" );
133 r = do_fipr2( vec4, vec3 );
134 write_string( "fipr: " );
135 write_int( *(unsigned int *)&r );
136 write_string( "\n" );
138 }
140 void test_ftrv( )
141 {
143 do_ftrv( matrix, vec1 );
144 write_string( "ftrv: " );
145 write_int( *(unsigned int *)&vec1[0] );
146 write_int( *(unsigned int *)&vec1[1] );
147 write_int( *(unsigned int *)&vec1[2] );
148 write_int( *(unsigned int *)&vec1[3] );
149 write_string( "\n" );
151 do_ftrv2( matrix, vec2 );
153 write_string( "ftrv: " );
154 write_int( *(unsigned int *)&vec2[0] );
155 write_int( *(unsigned int *)&vec2[1] );
156 write_int( *(unsigned int *)&vec2[2] );
157 write_int( *(unsigned int *)&vec2[3] );
158 write_string( "\n" );
160 }
163 int main()
164 {
165 fprintf( stderr, "LL: %d\n", sizeof(unsigned long long) );
166 write_int( get_fpscr() );
167 write_string( "\n" );
168 test_fsca( 0x00000000, 0, 1 );
169 test_fsca( 0x00011234, 0.43205646, 0.90184659 );
170 test_fsca( 0xFEDCBA98, -0.99121743, -0.13224234 );
171 test_fsrra( 25.0, 0.2 );
172 test_fsrra( 0.05, 4.4721361 );
173 test_fsrra( -12.345, QNANF );
174 test_coercion( -3.1415926 );
175 test_coercion( 123456789012346567.890 );
176 test_coercion( -2147483648.0 );
177 test_coercion( 5234.1234 );
178 test_doublearr( 5 );
179 test_floatarr( 5 );
180 test_fipr();
181 test_ftrv();
182 return 1;
183 }
.