📄 basic_op.h
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*/ __inline
Word16 round (Word32 L_var1)
{
Word16 var_out;
Word32 L_rounded;
L_rounded = L_add (L_var1, (Word32) 0x00008000L);
var_out = extract_h (L_rounded);
return (var_out);
}
/*___________________________________________________________________________
| |
| Function Name : L_mac |
| |
| Purpose : |
| |
| Multiply var1 by var2 and shift the result left by 1. Add the 32 bit |
| result to L_var3 with saturation, return a 32 bit result: |
| L_mac(L_var3,var1,var2) = L_add(L_var3,L_mult(var1,var2)). |
| |
| Complexity weight : 1 |
| |
| Inputs : |
| |
| L_var3 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| var1 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| var2 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| L_var_out |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
|___________________________________________________________________________|
*/ __inline
Word32 L_mac (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
Word32 L_product;
L_product = L_mult (var1, var2);
L_var_out = L_add (L_var3, L_product);
return (L_var_out);
}
/*___________________________________________________________________________
| |
| Function Name : L_mac |
| |
| Purpose : |
| |
| Multiply var1 by var2 and shift the result left by 1. Add the 32 bit |
| result to L_var3 with saturation, return a 32 bit result: |
| L_mac(L_var3,var1,var2) = L_add(L_var3,L_mult(var1,var2)). |
| |
| Complexity weight : 1 |
| |
| Inputs : |
| |
| L_var3 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| var1 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| var2 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| L_var_out |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
|___________________________________________________________________________|
*/ __inline
Word32 L_Q0mac (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
Word32 L_product;
L_product = Q0_mult (var1, var2);
L_var_out = L_add (L_var3, L_product);
return (L_var_out);
}
/*___________________________________________________________________________
| |
| Function Name : L_msu |
| |
| Purpose : |
| |
| Multiply var1 by var2 and shift the result left by 1. Subtract the 32 |
| bit result to L_var3 with saturation, return a 32 bit result: |
| L_msu(L_var3,var1,var2) = L_sub(L_var3,L_mult(var1,var2)). |
| |
| Complexity weight : 1 |
| |
| Inputs : |
| |
| L_var3 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| var1 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| var2 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| L_var_out |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
|___________________________________________________________________________|
*/ __inline
Word32 L_msu (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
Word32 L_product;
L_product = L_mult (var1, var2);
L_var_out = L_sub (L_var3, L_product);
return (L_var_out);
}
/*___________________________________________________________________________
| |
| Function Name : L_macNs |
| |
| Purpose : |
| |
| Multiply var1 by var2 and shift the result left by 1. Add the 32 bit |
| result to L_var3 without saturation, return a 32 bit result. Generate |
| carry and overflow values : |
| L_macNs(L_var3,var1,var2) = L_add_c(L_var3,L_mult(var1,var2)). |
| |
| Complexity weight : 1 |
| |
| Inputs : |
| |
| L_var3 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| var1 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| var2 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| L_var_out |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
| |
| Caution : |
| |
| In some cases the Carry flag has to be cleared or set before using |
| operators which take into account its value. |
|___________________________________________________________________________|
*/ __inline
Word32 L_macNs (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
L_var_out = L_mult (var1, var2);
L_var_out = L_add_c (L_var3, L_var_out);
return (L_var_out);
}
/*___________________________________________________________________________
| |
| Function Name : L_msuNs |
| |
| Purpose : |
| |
| Multiply var1 by var2 and shift the result left by 1. Subtract the 32 |
| bit result from L_var3 without saturation, return a 32 bit result. Ge- |
| nerate carry and overflow values : |
| L_msuNs(L_var3,var1,var2) = L_sub_c(L_var3,L_mult(var1,var2)). |
| |
| Complexity weight : 1 |
| |
| Inputs : |
| |
| L_var3 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| var1 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| var2 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| Outputs : |
| |
| none |
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