|
Last change
on this file since 105 was
81,
checked in by rosiere, 17 years ago
|
- Finish Environment (and test)
- Continue predictor_unit
- Add external tools
- svn keyword "Id" set
|
-
Property svn:keywords set to
Id
|
|
File size:
1.2 KB
|
| Line | |
|---|
| 1 | #include "func_math.h" |
|---|
| 2 | |
|---|
| 3 | //-----[ Multiplication ]-------------------------------------------------- |
|---|
| 4 | |
|---|
| 5 | // Multiplication rapide |
|---|
| 6 | unsigned int mul_soft(unsigned int op1, |
|---|
| 7 | unsigned int op2) |
|---|
| 8 | { |
|---|
| 9 | unsigned int num_bit,carry; |
|---|
| 10 | unsigned int op2_aux = op2; |
|---|
| 11 | unsigned int res = 0; |
|---|
| 12 | |
|---|
| 13 | for(num_bit=0;num_bit<32; num_bit++) |
|---|
| 14 | { |
|---|
| 15 | if (op2_aux == 0) |
|---|
| 16 | break; |
|---|
| 17 | |
|---|
| 18 | carry = op2_aux & 1; |
|---|
| 19 | op2_aux = op2_aux >> 1; |
|---|
| 20 | |
|---|
| 21 | if (carry!=0) |
|---|
| 22 | res += (op1 << num_bit); |
|---|
| 23 | } |
|---|
| 24 | return res; |
|---|
| 25 | } |
|---|
| 26 | |
|---|
| 27 | unsigned int mul_hard(unsigned int op1, |
|---|
| 28 | unsigned int op2) |
|---|
| 29 | { |
|---|
| 30 | return op1*op2; |
|---|
| 31 | } |
|---|
| 32 | |
|---|
| 33 | //-----[ Division ]-------------------------------------------------------- |
|---|
| 34 | |
|---|
| 35 | unsigned int div_soft( unsigned int op1, |
|---|
| 36 | unsigned int op2) |
|---|
| 37 | { |
|---|
| 38 | unsigned res; |
|---|
| 39 | |
|---|
| 40 | if (op2 == 0) |
|---|
| 41 | return 0; |
|---|
| 42 | |
|---|
| 43 | for (res = 0; op1 >= op2; res ++) |
|---|
| 44 | op1 -= op2; |
|---|
| 45 | |
|---|
| 46 | return res; |
|---|
| 47 | } |
|---|
| 48 | |
|---|
| 49 | unsigned int div_hard( unsigned int op1, |
|---|
| 50 | unsigned int op2) |
|---|
| 51 | { |
|---|
| 52 | //return (op1/op2); |
|---|
| 53 | return div_soft(op1,op2); |
|---|
| 54 | } |
|---|
| 55 | |
|---|
| 56 | //-----[ Modulo ]---------------------------------------------------------- |
|---|
| 57 | |
|---|
| 58 | unsigned int modulo( unsigned int x, |
|---|
| 59 | unsigned int base) |
|---|
| 60 | { |
|---|
| 61 | if (base==0) |
|---|
| 62 | return 0; |
|---|
| 63 | |
|---|
| 64 | while(x >= base) |
|---|
| 65 | x -= base; |
|---|
| 66 | |
|---|
| 67 | return x; |
|---|
| 68 | } |
|---|
Note: See
TracBrowser
for help on using the repository browser.
