| 1 | #include "func_math.h" |
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| 2 | #include "func_io.h" |
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| 3 | |
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| 4 | //-----[ Multiplication ]-------------------------------------------------- |
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| 5 | |
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| 6 | // Multiplication rapide |
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| 7 | unsigned int mul_soft(unsigned int op1, |
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| 8 | unsigned int op2) |
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| 9 | { |
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| 10 | unsigned int num_bit,carry; |
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| 11 | unsigned int op2_aux = op2; |
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| 12 | unsigned int res = 0; |
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| 13 | |
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| 14 | for(num_bit=0;num_bit<32; num_bit++) |
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| 15 | { |
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| 16 | if (op2_aux == 0) |
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| 17 | break; |
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| 18 | |
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| 19 | carry = op2_aux & 1; |
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| 20 | op2_aux = op2_aux >> 1; |
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| 21 | |
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| 22 | if (carry!=0) |
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| 23 | res += (op1 << num_bit); |
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| 24 | } |
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| 25 | return res; |
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| 26 | } |
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| 27 | |
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| 28 | unsigned int mul_hard(unsigned int op1, |
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| 29 | unsigned int op2) |
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| 30 | { |
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| 31 | return op1*op2; |
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| 32 | } |
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| 33 | |
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| 34 | //-----[ Division ]-------------------------------------------------------- |
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| 35 | |
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| 36 | unsigned int div_soft( unsigned int op1, |
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| 37 | unsigned int op2) |
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| 38 | { |
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| 39 | unsigned res; |
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| 40 | |
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| 41 | if (op2 == 0) |
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| 42 | return 0; |
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| 43 | |
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| 44 | for (res = 0; op1 >= op2; res ++) |
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| 45 | op1 -= op2; |
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| 46 | |
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| 47 | return res; |
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| 48 | } |
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| 49 | |
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| 50 | unsigned int div_hard( unsigned int op1, |
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| 51 | unsigned int op2) |
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| 52 | { |
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| 53 | //return (op1/op2); |
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| 54 | return div_soft(op1,op2); |
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| 55 | } |
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| 56 | |
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| 57 | //-----[ Modulo ]---------------------------------------------------------- |
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| 58 | |
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| 59 | unsigned int modulo( unsigned int x, |
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| 60 | unsigned int base) |
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| 61 | { |
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| 62 | if (base==0) |
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| 63 | return 0; |
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| 64 | |
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| 65 | while(x >= base) |
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| 66 | x -= base; |
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| 67 | |
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| 68 | return x; |
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| 69 | } |
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| 70 | |
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| 71 | //------------------------------------------------------------------------- |
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| 72 | //-----[ Test ]------------------------------------------------------------ |
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| 73 | //------------------------------------------------------------------------- |
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| 74 | |
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| 75 | void test_mul_soft (void) |
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| 76 | { |
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| 77 | if (mul_soft(0x00000000,0x00000000) != 0x00000000) quit( 1); |
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| 78 | if (mul_soft(0x12345678,0x00000001) != 0x12345678) quit( 2); |
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| 79 | if (mul_soft(0x00000025,0x000064ab) != 0x000e8cb7) quit( 3); |
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| 80 | if (mul_soft(0x0000083b,0x000007bd) != 0x003fb08f) quit( 4); // (0x00000000003fb08f) |
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| 81 | if (mul_soft(0x0000083b,0xfffff843) != 0xffc04f71) quit( 5); // (0xffffffffffc04f71) |
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| 82 | if (mul_soft(0xfffff7c5,0x000007bd) != 0xffc04f71) quit( 6); // (0xffffffffffc04f71) |
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| 83 | if (mul_soft(0xfffff7c5,0xfffff843) != 0x003fb08f) quit( 7); // (0x00000000003fb08f) |
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| 84 | if (mul_soft(0x017e9157,0x00d5ce37) != 0x18883bb1) quit( 8); // (0x00013f8318883bb1) |
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| 85 | if (mul_soft(0x017e9157,0xff2a31c9) != 0xe777c44f) quit( 9); // (0xfffec07ce777c44f) |
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| 86 | if (mul_soft(0xfe816ea9,0x00d5ce37) != 0xe777c44f) quit(10); // (0xfffec07ce777c44f) |
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| 87 | if (mul_soft(0xfe816ea9,0xff2a31c9) != 0x18883bb1) quit(11); // (0x00013f8318883bb1) |
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| 88 | } |
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| 89 | |
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| 90 | void test_div_soft (void) |
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| 91 | { |
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| 92 | /* if (div_soft(0x00000000,0x00000001) != 0x00000000) quit( 1); */ |
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| 93 | /* if (div_soft(0x21071981,0x00000001) != 0x21071981) quit( 2); */ |
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| 94 | /* if (div_soft(0xdeadbeef,0x00000001) != 0xdeadbeef) quit( 3); */ |
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| 95 | if (div_soft(4 ,2 ) != 2 ) quit( 3); |
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| 96 | if (div_soft(680 ,40 ) != 17 ) quit( 4); |
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| 97 | if (div_soft(15431115 ,9835 ) != 1569 ) quit( 5); |
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| 98 | } |
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| 99 | |
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| 100 | void test_modulo (void) |
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| 101 | { |
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| 102 | if (modulo(16834,563) != 507) quit(1); |
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| 103 | } |
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| 104 | |
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