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D-Modem/pjproject-2.11.1/third_party/g7221/common/basic_op.c

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initial commit
2021-10-30 02:41:03 +08:00
#include "config.h"
#if !PJMEDIA_LIBG7221_FUNCS_INLINED || \
(PJMEDIA_LIBG7221_FUNCS_INLINED && defined(__BASIC_OP_H__))
/*___________________________________________________________________________
| |
| Basic arithmetic operators. |
|___________________________________________________________________________|
*/
/*___________________________________________________________________________
| |
| Include-Files |
|___________________________________________________________________________|
*/
//#include <stdio.h>
//#include <stdlib.h>
#include "typedef.h"
#include "basic_op.h"
#include <pj/assert.h>
#if (WMOPS)
#include "count.h"
extern BASIC_OP multiCounter[MAXCOUNTERS];
extern int currCounter;
#endif
/*___________________________________________________________________________
| |
| Constants and Globals |
|___________________________________________________________________________|
*/
#if INCLUDE_UNSAFE
Flag g7221_Overflow = 0;
Flag g7221_Carry = 0;
#endif
/*___________________________________________________________________________
| |
| Functions |
|___________________________________________________________________________|
*/
/*___________________________________________________________________________
| |
| Function Name : shr |
| |
| Purpose : |
| |
| Arithmetically shift the 16 bit input var1 right var2 positions with |
| sign extension. If var2 is negative, arithmetically shift var1 left by |
| -var2 with sign extension. Saturate the result in case of underflows or |
| overflows. |
| |
| Complexity weight : 1 |
| |
| Inputs : |
| |
| 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 : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) shr (Word16 var1, Word16 var2)
{
if (var2 < 0)
{
if (var2 < -16)
var2 = -16;
return shl_nocheck(var1, (Word16) -var2);
}
else
{
return shr_nocheck(var1, var2);
}
}
/* ------------------------- End of shr() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : shl |
| |
| Purpose : |
| |
| Arithmetically shift the 16 bit input var1 left var2 positions.Zero fill|
| the var2 LSB of the result. If var2 is negative, arithmetically shift |
| var1 right by -var2 with sign extension. Saturate the result in case of |
| underflows or overflows. |
| |
| Complexity weight : 1 |
| |
| Inputs : |
| |
| 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 : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) shl (Word16 var1, Word16 var2)
{
if (var2 < 0)
{
return shr_nocheck(var1, (Word16) -var2);
}
else
{
return shl_nocheck(var1, var2);
}
}
/* ------------------------- End of shl() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : mult |
| |
| Purpose : |
| |
| Performs the multiplication of var1 by var2 and gives a 16 bit result |
| which is scaled i.e.: |
| mult(var1,var2) = extract_l(L_shr((var1 times var2),15)) and |
| mult(-32768,-32768) = 32767. |
| |
| Complexity weight : 1 |
| |
| Inputs : |
| |
| 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 : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) mult (Word16 var1, Word16 var2)
{
Word16 var_out;
Word32 L_product;
L_product = (Word32) var1 *(Word32) var2;
L_product = (L_product & (Word32) 0xffff8000L) >> 15;
if (L_product & (Word32) 0x00010000L)
L_product = L_product | (Word32) 0xffff0000L;
var_out = saturate (L_product);
#if (WMOPS)
multiCounter[currCounter].mult++;
#endif
return (var_out);
}
/* ------------------------- End of mult() ------------------------- */
/*___________________________________________________________________________
| |
| 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. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_msu (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
Word32 L_product;
L_product = L_mult (var1, var2);
#if (WMOPS)
multiCounter[currCounter].L_mult--;
#endif
L_var_out = L_sub (L_var3, L_product);
#if (WMOPS)
multiCounter[currCounter].L_sub--;
multiCounter[currCounter].L_msu++;
#endif
return (L_var_out);
}
/* ------------------------- End of L_msu() ------------------------- */
#if INCLUDE_UNSAFE
/*___________________________________________________________________________
| |
| 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. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_macNs (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
L_var_out = L_mult (var1, var2);
#if (WMOPS)
multiCounter[currCounter].L_mult--;
#endif
L_var_out = L_add_c (L_var3, L_var_out);
#if (WMOPS)
multiCounter[currCounter].L_add_c--;
multiCounter[currCounter].L_macNs++;
#endif
return (L_var_out);
}
#endif
/* ------------------------- End of L_macNs() ------------------------- */
#if INCLUDE_UNSAFE
/*___________________________________________________________________________
| |
| 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 |
| |
| 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. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_msuNs (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
L_var_out = L_mult (var1, var2);
#if (WMOPS)
multiCounter[currCounter].L_mult--;
#endif
L_var_out = L_sub_c (L_var3, L_var_out);
#if (WMOPS)
multiCounter[currCounter].L_sub_c--;
multiCounter[currCounter].L_msuNs++;
#endif
return (L_var_out);
}
#endif
/* ------------------------- End of L_msuNs() ------------------------- */
#if INCLUDE_UNSAFE
/*___________________________________________________________________________
| |
| Function Name : L_add_c |
| |
| Purpose : |
| |
| Performs 32 bits addition of the two 32 bits variables (L_var1+L_var2+C)|
| with carry. No saturation. Generate carry and Overflow values. The car- |
| ry and overflow values are binary variables which can be tested and as- |
| signed values. |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| L_var1 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| L_var2 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| 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. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_add_c (Word32 L_var1, Word32 L_var2)
{
Word32 L_var_out;
Word32 L_test;
Flag carry_int = 0;
L_var_out = L_var1 + L_var2 + GET_CARRY();
L_test = L_var1 + L_var2;
if ((L_var1 > 0) && (L_var2 > 0) && (L_test < 0))
{
SET_OVERFLOW(1);
carry_int = 0;
}
else
{
if ((L_var1 < 0) && (L_var2 < 0))
{
if (L_test >= 0)
{
SET_OVERFLOW(1);
carry_int = 1;
}
else
{
SET_OVERFLOW(0);
carry_int = 1;
}
}
else
{
if (((L_var1 ^ L_var2) < 0) && (L_test >= 0))
{
SET_OVERFLOW(0);
carry_int = 1;
}
else
{
SET_OVERFLOW(0);
carry_int = 0;
}
}
}
if (GET_CARRY())
{
if (L_test == MAX_32)
{
SET_OVERFLOW(1);
SET_CARRY(carry_int);
}
else
{
if (L_test == (Word32) 0xFFFFFFFFL)
{
SET_CARRY(1);
}
else
{
SET_CARRY(carry_int);
}
}
}
else
{
SET_CARRY(carry_int);
}
#if (WMOPS)
multiCounter[currCounter].L_add_c++;
#endif
return (L_var_out);
}
#endif
/* ------------------------- End of L_add_c() ------------------------- */
#if INCLUDE_UNSAFE
/*___________________________________________________________________________
| |
| Function Name : L_sub_c |
| |
| Purpose : |
| |
| Performs 32 bits subtraction of the two 32 bits variables with carry |
| (borrow) : L_var1-L_var2-C. No saturation. Generate carry and Overflow |
| values. The carry and overflow values are binary variables which can |
| be tested and assigned values. |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| L_var1 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| L_var2 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| 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. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_sub_c (Word32 L_var1, Word32 L_var2)
{
Word32 L_var_out;
Word32 L_test;
Flag carry_int = 0;
if (GET_CARRY())
{
SET_CARRY(0);
if (L_var2 != MIN_32)
{
L_var_out = L_add_c (L_var1, -L_var2);
#if (WMOPS)
multiCounter[currCounter].L_add_c--;
#endif
}
else
{
L_var_out = L_var1 - L_var2;
if (L_var1 > 0L)
{
SET_OVERFLOW(1);
SET_CARRY(0);
}
}
}
else
{
L_var_out = L_var1 - L_var2 - (Word32) 0X00000001L;
L_test = L_var1 - L_var2;
if ((L_test < 0) && (L_var1 > 0) && (L_var2 < 0))
{
SET_OVERFLOW(1);
carry_int = 0;
}
else if ((L_test > 0) && (L_var1 < 0) && (L_var2 > 0))
{
SET_OVERFLOW(1);
carry_int = 1;
}
else if ((L_test > 0) && ((L_var1 ^ L_var2) > 0))
{
SET_OVERFLOW(0);
carry_int = 1;
}
if (L_test == MIN_32)
{
SET_OVERFLOW(1);
SET_CARRY(carry_int);
}
else
{
SET_CARRY(carry_int);
}
}
#if (WMOPS)
multiCounter[currCounter].L_sub_c++;
#endif
return (L_var_out);
}
#endif
/* ------------------------- End of L_sub_c() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : L_negate |
| |
| Purpose : |
| |
| Negate the 32 bit variable L_var1 with saturation; saturate in the case |
| where input is -2147483648 (0x8000 0000). |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| L_var1 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| 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. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_negate (Word32 L_var1)
{
Word32 L_var_out;
L_var_out = (L_var1 == MIN_32) ? MAX_32 : -L_var1;
#if (WMOPS)
multiCounter[currCounter].L_negate++;
#endif
return (L_var_out);
}
/* ------------------------- End of L_negate() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : mult_r |
| |
| Purpose : |
| |
| Same as mult with rounding, i.e.: |
| mult_r(var1,var2) = extract_l(L_shr(((var1 * var2) + 16384),15)) and |
| mult_r(-32768,-32768) = 32767. |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| 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 : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) mult_r (Word16 var1, Word16 var2)
{
Word16 var_out;
Word32 L_product_arr;
L_product_arr = (Word32) var1 *(Word32) var2; /* product */
L_product_arr += (Word32) 0x00004000L; /* round */
L_product_arr &= (Word32) 0xffff8000L;
L_product_arr >>= 15; /* shift */
if (L_product_arr & (Word32) 0x00010000L) /* sign extend when necessary */
{
L_product_arr |= (Word32) 0xffff0000L;
}
var_out = saturate (L_product_arr);
#if (WMOPS)
multiCounter[currCounter].mult_r++;
#endif
return (var_out);
}
/* ------------------------- End of mult_r() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : shr_r |
| |
| Purpose : |
| |
| Same as shr(var1,var2) but with rounding. Saturate the result in case of|
| underflows or overflows : |
| - If var2 is greater than zero : |
| if (sub(shl(shr(var1,var2),1),shr(var1,sub(var2,1)))) |
| is equal to zero |
| then |
| shr_r(var1,var2) = shr(var1,var2) |
| else |
| shr_r(var1,var2) = add(shr(var1,var2),1) |
| - If var2 is less than or equal to zero : |
| shr_r(var1,var2) = shr(var1,var2). |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| 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 : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) shr_r (Word16 var1, Word16 var2)
{
Word16 var_out;
if (var2 > 15)
{
var_out = 0;
}
else
{
var_out = shr (var1, var2);
#if (WMOPS)
multiCounter[currCounter].shr--;
#endif
if (var2 > 0)
{
if ((var1 & ((Word16) 1 << (var2 - 1))) != 0)
{
var_out++;
}
}
}
#if (WMOPS)
multiCounter[currCounter].shr_r++;
#endif
return (var_out);
}
/* ------------------------- End of shr_r() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : mac_r |
| |
| Purpose : |
| |
| Multiply var1 by var2 and shift the result left by 1. Add the 32 bit |
| result to L_var3 with saturation. Round the LS 16 bits of the result |
| into the MS 16 bits with saturation and shift the result right by 16. |
| Return a 16 bit result. |
| mac_r(L_var3,var1,var2) = round(L_mac(L_var3,var1,var2)) |
| |
| Complexity weight : 2 |
| |
| 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 : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0x0000 8000 <= L_var_out <= 0x0000 7fff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) mac_r (Word32 L_var3, Word16 var1, Word16 var2)
{
Word16 var_out;
L_var3 = L_mac (L_var3, var1, var2);
#if (WMOPS)
multiCounter[currCounter].L_mac--;
#endif
L_var3 = L_add (L_var3, (Word32) 0x00008000L);
#if (WMOPS)
multiCounter[currCounter].L_add--;
#endif
var_out = extract_h (L_var3);
#if (WMOPS)
multiCounter[currCounter].extract_h--;
multiCounter[currCounter].mac_r++;
#endif
return (var_out);
}
/* ------------------------- End of mac_r() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : msu_r |
| |
| Purpose : |
| |
| Multiply var1 by var2 and shift the result left by 1. Subtract the 32 |
| bit result to L_var3 with saturation. Round the LS 16 bits of the res- |
| ult into the MS 16 bits with saturation and shift the result right by |
| 16. Return a 16 bit result. |
| msu_r(L_var3,var1,var2) = round(L_msu(L_var3,var1,var2)) |
| |
| Complexity weight : 2 |
| |
| 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 : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0x0000 8000 <= L_var_out <= 0x0000 7fff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) msu_r (Word32 L_var3, Word16 var1, Word16 var2)
{
Word16 var_out;
L_var3 = L_msu (L_var3, var1, var2);
#if (WMOPS)
multiCounter[currCounter].L_msu--;
#endif
L_var3 = L_add (L_var3, (Word32) 0x00008000L);
#if (WMOPS)
multiCounter[currCounter].L_add--;
#endif
var_out = extract_h (L_var3);
#if (WMOPS)
multiCounter[currCounter].extract_h--;
multiCounter[currCounter].msu_r++;
#endif
return (var_out);
}
/* ------------------------- End of msu_r() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : L_deposit_h |
| |
| Purpose : |
| |
| Deposit the 16 bit var1 into the 16 MS bits of the 32 bit output. The |
| 16 LS bits of the output are zeroed. |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| var1 |
| 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 <= var_out <= 0x7fff 0000. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_deposit_h (Word16 var1)
{
Word32 L_var_out;
L_var_out = (Word32) var1 << 16;
#if (WMOPS)
multiCounter[currCounter].L_deposit_h++;
#endif
return (L_var_out);
}
/* ------------------------- End of L_deposit_h() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : L_deposit_l |
| |
| Purpose : |
| |
| Deposit the 16 bit var1 into the 16 LS bits of the 32 bit output. The |
| 16 MS bits of the output are sign extended. |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| var1 |
| 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 : 0xFFFF 8000 <= var_out <= 0x0000 7fff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_deposit_l (Word16 var1)
{
Word32 L_var_out;
L_var_out = (Word32) var1;
#if (WMOPS)
multiCounter[currCounter].L_deposit_l++;
#endif
return (L_var_out);
}
/* ------------------------- End of L_deposit_l() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : L_shr_r |
| |
| Purpose : |
| |
| Same as L_shr(L_var1,var2) but with rounding. Saturate the result in |
| case of underflows or overflows : |
| - If var2 is greater than zero : |
| if (L_sub(L_shl(L_shr(L_var1,var2),1),L_shr(L_var1,sub(var2,1))))|
| is equal to zero |
| then |
| L_shr_r(L_var1,var2) = L_shr(L_var1,var2) |
| else |
| L_shr_r(L_var1,var2) = L_add(L_shr(L_var1,var2),1) |
| - If var2 is less than or equal to zero : |
| L_shr_r(L_var1,var2) = L_shr(L_var1,var2). |
| |
| Complexity weight : 3 |
| |
| Inputs : |
| |
| L_var1 |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= var1 <= 0x7fff ffff. |
| |
| 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 <= var_out <= 0x7fff ffff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_shr_r (Word32 L_var1, Word16 var2)
{
Word32 L_var_out;
if (var2 > 31)
{
L_var_out = 0;
}
else
{
L_var_out = L_shr (L_var1, var2);
#if (WMOPS)
multiCounter[currCounter].L_shr--;
#endif
if (var2 > 0)
{
if ((L_var1 & ((Word32) 1 << (var2 - 1))) != 0)
{
L_var_out++;
}
}
}
#if (WMOPS)
multiCounter[currCounter].L_shr_r++;
#endif
return (L_var_out);
}
/* ------------------------- End of L_shr_r() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : L_abs |
| |
| Purpose : |
| |
| Absolute value of L_var1; Saturate in case where the input is |
| -214783648 |
| |
| Complexity weight : 3 |
| |
| Inputs : |
| |
| L_var1 |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= var1 <= 0x7fff ffff. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| L_var_out |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x0000 0000 <= var_out <= 0x7fff ffff. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_abs (Word32 L_var1)
{
Word32 L_var_out;
if (L_var1 == MIN_32)
{
L_var_out = MAX_32;
}
else
{
if (L_var1 < 0)
{
L_var_out = -L_var1;
}
else
{
L_var_out = L_var1;
}
}
#if (WMOPS)
multiCounter[currCounter].L_abs++;
#endif
return (L_var_out);
}
/* ------------------------- End of L_abs() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : norm_s |
| |
| Purpose : |
| |
| Produces the number of left shift needed to normalize the 16 bit varia- |
| ble var1 for positive values on the interval with minimum of 16384 and |
| maximum of 32767, and for negative values on the interval with minimum |
| of -32768 and maximum of -16384; in order to normalize the result, the |
| following operation must be done : |
| norm_var1 = shl(var1,norm_s(var1)). |
| |
| Complexity weight : 15 |
| |
| Inputs : |
| |
| var1 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0x0000 0000 <= var_out <= 0x0000 000f. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) norm_s (Word16 var1)
{
Word16 var_out;
if (var1 == 0)
{
var_out = 0;
}
else
{
if ((UWord16)var1 == (UWord16)0xffff)
{
var_out = 15;
}
else
{
if (var1 < 0)
{
var1 = (Word16)(~var1);
}
for (var_out = 0; var1 < 0x4000; var_out++)
{
var1 <<= 1;
}
}
}
#if (WMOPS)
multiCounter[currCounter].norm_s++;
#endif
return (var_out);
}
/* ------------------------- End of norm_s() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : div_s |
| |
| Purpose : |
| |
| Produces a result which is the fractional integer division of var1 by |
| var2; var1 and var2 must be positive and var2 must be greater or equal |
| to var1; the result is positive (leading bit equal to 0) and truncated |
| to 16 bits. |
| If var1 = var2 then div(var1,var2) = 32767. |
| |
| Complexity weight : 18 |
| |
| Inputs : |
| |
| var1 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0x0000 0000 <= var1 <= var2 and var2 != 0. |
| |
| var2 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : var1 <= var2 <= 0x0000 7fff and var2 != 0. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0x0000 0000 <= var_out <= 0x0000 7fff. |
| It's a Q15 value (point between b15 and b14). |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) div_s (Word16 var1, Word16 var2)
{
Word16 var_out = 0;
Word16 iteration;
Word32 L_num;
Word32 L_denom;
if ((var1 > var2) || (var1 < 0) || (var2 < 0))
{
//printf ("Division Error var1=%d var2=%d\n", var1, var2);
//abort(); /* exit (0); */
pj_assert(!"Division Error");
}
if (var2 == 0)
{
//printf ("Division by 0, Fatal error \n");
//abort(); /* exit (0); */
assert(!"Division by 0");
}
if (var1 == 0)
{
var_out = 0;
}
else
{
if (var1 == var2)
{
var_out = MAX_16;
}
else
{
L_num = L_deposit_l (var1);
#if (WMOPS)
multiCounter[currCounter].L_deposit_l--;
#endif
L_denom = L_deposit_l (var2);
#if (WMOPS)
multiCounter[currCounter].L_deposit_l--;
#endif
for (iteration = 0; iteration < 15; iteration++)
{
var_out <<= 1;
L_num <<= 1;
if (L_num >= L_denom)
{
L_num = L_sub (L_num, L_denom);
#if (WMOPS)
multiCounter[currCounter].L_sub--;
#endif
var_out = add (var_out, 1);
#if (WMOPS)
multiCounter[currCounter].add--;
#endif
}
}
}
}
#if (WMOPS)
multiCounter[currCounter].div_s++;
#endif
return (var_out);
}
/* ------------------------- End of div_s() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : norm_l |
| |
| Purpose : |
| |
| Produces the number of left shifts needed to normalize the 32 bit varia-|
| ble L_var1 for positive values on the interval with minimum of |
| 1073741824 and maximum of 2147483647, and for negative values on the in-|
| terval with minimum of -2147483648 and maximum of -1073741824; in order |
| to normalize the result, the following operation must be done : |
| norm_L_var1 = L_shl(L_var1,norm_l(L_var1)). |
| |
| Complexity weight : 30 |
| |
| Inputs : |
| |
| L_var1 |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= var1 <= 0x7fff ffff. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0x0000 0000 <= var_out <= 0x0000 001f. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) norm_l (Word32 L_var1)
{
Word16 var_out;
if (L_var1 == 0)
{
var_out = 0;
}
else
{
if (L_var1 == (Word32) 0xffffffffL)
{
var_out = 31;
}
else
{
if (L_var1 < 0)
{
L_var1 = ~L_var1;
}
for (var_out = 0; L_var1 < (Word32) 0x40000000L; var_out++)
{
L_var1 <<= 1;
}
}
}
#if (WMOPS)
multiCounter[currCounter].norm_l++;
#endif
return (var_out);
}
/* ------------------------- End of norm_l() ------------------------- */
/*
*****************************************************************
Additional operators extracted from the G.723.1 Library
Adapted for WMOPS calculations
*****************************************************************
*/
/*___________________________________________________________________________
| |
| Function Name : L_mls |
| |
| Purpose : |
| |
| Multiplies a 16 bit word v by a 32 bit word Lv and returns a 32 bit |
| word (multiplying 16 by 32 bit words gives 48 bit word; the function |
| extracts the 32 MSB and shift the result to the left by 1). |
| |
| A 32 bit word can be written as |
| Lv = a + b * 2^16 |
| where a= unsigned 16 LSBs and b= signed 16 MSBs. |
| The function returns v * Lv / 2^15 which is equivalent to |
| a*v / 2^15 + b*v*2 |
| |
| Complexity weight : 6 [to be confirmed] |
| |
| Inputs : |
| |
| Lv |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= var1 <= 0x7fff ffff. |
| v |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0x8000 <= var1 <= 0x7fff. |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| var_out |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= var_out <= 0x7fff ffff. |
| |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word32) L_mls (Word32 Lv, Word16 v)
{
Word32 Temp ;
Temp = Lv & (Word32) 0x0000ffff ;
Temp = Temp * (Word32) v ;
Temp = L_shr_nocheck( Temp, (Word16) 15 ) ;
Temp = L_mac( Temp, v, extract_h(Lv) ) ;
#if (WMOPS)
multiCounter[currCounter].L_shr--;
multiCounter[currCounter].L_mac--;
multiCounter[currCounter].extract_h--;
multiCounter[currCounter].L_mls++;
#endif
return Temp ;
}
/* ------------------------- End of L_mls() ------------------------- */
/*__________________________________________________________________________
| |
| Function Name : div_l |
| |
| Purpose : |
| |
| Produces a result which is the fractional integer division of L_var1 by|
| var2; L_var1 and var2 must be positive and var2 << 16 must be greater or|
| equal to L_var1; the result is positive (leading bit equal to 0) and |
| truncated to 16 bits. |
| If L_var1 == var2 << 16 then div_l(L_var1,var2) = 32767. |
| |
| Complexity weight : 20 |
| |
| Inputs : |
| |
| L_var1 |
| 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x0000 0000 <= var1 <= (var2 << 16) and var2 != 0. |
| L_var1 must be considered as a Q.31 value |
| |
| var2 |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : var1 <= (var2<< 16) <= 0x7fff0000 and var2 != 0. |
| var2 must be considered as a Q.15 value |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| var_out |
| 16 bit short signed integer (Word16) whose value falls in the |
| range : 0x0000 0000 <= var_out <= 0x0000 7fff. |
| It's a Q15 value (point between b15 and b14). |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) div_l (Word32 L_num, Word16 den)
{
Word16 var_out = (Word16)0;
Word32 L_den;
Word16 iteration;
#if (WMOPS)
multiCounter[currCounter].div_l++;
#endif
if ( den == (Word16) 0 ) {
//printf("Division by 0 in div_l, Fatal error \n");
//exit(0);
assert(!"Division by 0");
}
if ( (L_num < (Word32) 0) || (den < (Word16) 0) ) {
//printf("Division Error in div_l, Fatal error \n");
//exit(0);
assert(!"Division Error");
}
L_den = L_deposit_h( den ) ;
#if (WMOPS)
multiCounter[currCounter].L_deposit_h--;
#endif
if ( L_num >= L_den ){
return MAX_16 ;
}
else {
L_num = L_shr_nocheck(L_num, (Word16)1) ;
L_den = L_shr_nocheck(L_den, (Word16)1);
#if (WMOPS)
multiCounter[currCounter].L_shr-=2;
#endif
for(iteration=(Word16)0; iteration< (Word16)15;iteration++) {
var_out = shl_nocheck( var_out, (Word16)1);
L_num = L_shl_nocheck( L_num, (Word16)1);
#if (WMOPS)
multiCounter[currCounter].shl--;
multiCounter[currCounter].L_shl--;
#endif
if (L_num >= L_den) {
L_num = L_sub(L_num,L_den);
var_out = add(var_out, (Word16)1);
#if (WMOPS)
multiCounter[currCounter].L_sub--;
multiCounter[currCounter].add--;
#endif
}
}
return var_out;
}
}
/* ------------------------- End of div_l() ------------------------- */
/*__________________________________________________________________________
| |
| Function Name : i_mult |
| |
| Purpose : |
| |
| Integer 16-bit multiplication. No overflow protection is performed if |
| ORIGINAL_G7231 is defined. |
| |
| Complexity weight : TBD |
| |
| Inputs : |
| |
| a |
| 16 bit short signed integer (Word16). |
| |
| b |
| 16 bit short signed integer (Word16). |
| |
| Outputs : |
| |
| none |
| |
| Return Value : |
| |
| 16 bit short signed integer (Word16). No overflow checks |
| are performed if ORIGINAL_G7231 is defined. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(Word16) i_mult (Word16 a, Word16 b)
{
#ifdef ORIGINAL_G7231
return a*b ;
#else
Word32 register c=a*b;
#if (WMOPS)
multiCounter[currCounter].i_mult++;
#endif
return saturate(c) ;
#endif
}
/* ------------------------- End of i_mult() ------------------------- */
/*
**********************************************************************
The following three operators are not part of the original
G.729/G.723.1 set of basic operators and implement shiftless
accumulation operation.
**********************************************************************
*/
/*___________________________________________________________________________
|
| Function Name : L_mult0
|
| Purpose :
|
| L_mult0 is the 32 bit result of the multiplication of var1 times var2
| without one left shift.
|
| Complexity weight : 1
|
| Inputs :
|
| 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.
|
| Return Value :
|
| L_var_out
| 32 bit long signed integer (Word32) whose value falls in the
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff.
|___________________________________________________________________________
*/
LIBG7221_DEF(Word32) L_mult0 (Word16 var1,Word16 var2)
{
Word32 L_var_out;
L_var_out = (Word32)var1 * (Word32)var2;
#if (WMOPS)
multiCounter[currCounter].L_mult0++;
#endif
return(L_var_out);
}
/* ------------------------- End of L_mult0() ------------------------- */
/*___________________________________________________________________________
|
| Function Name : L_mac0
|
| Purpose :
|
| Multiply var1 by var2 (without left shift) and add the 32 bit result to
| L_var3 with saturation, return a 32 bit result:
| L_mac0(L_var3,var1,var2) = L_add(L_var3,(L_mult0(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.
|
| Return Value :
|
| L_var_out
| 32 bit long signed integer (Word32) whose value falls in the
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff.
|___________________________________________________________________________
*/
LIBG7221_DEF(Word32) L_mac0 (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
Word32 L_product;
L_product = L_mult0(var1,var2);
L_var_out = L_add(L_var3,L_product);
#if (WMOPS)
multiCounter[currCounter].L_mac0++;
multiCounter[currCounter].L_mult0--;
multiCounter[currCounter].L_add--;
#endif
return(L_var_out);
}
/* ------------------------- End of L_mac0() ------------------------- */
/*___________________________________________________________________________
|
| Function Name : L_msu0
|
| Purpose :
|
| Multiply var1 by var2 (without left shift) and subtract the 32 bit
| result to L_var3 with saturation, return a 32 bit result:
| L_msu0(L_var3,var1,var2) = L_sub(L_var3,(L_mult0(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.
|
| Return Value :
|
| L_var_out
| 32 bit long signed integer (Word32) whose value falls in the
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff.
|___________________________________________________________________________
*/
LIBG7221_DEF(Word32) L_msu0 (Word32 L_var3, Word16 var1, Word16 var2)
{
Word32 L_var_out;
Word32 L_product;
L_product = L_mult0(var1,var2);
L_var_out = L_sub(L_var3,L_product);
#if (WMOPS)
multiCounter[currCounter].L_msu0++;
multiCounter[currCounter].L_mult0--;
multiCounter[currCounter].L_sub--;
#endif
return(L_var_out);
}
/* ------------------------- End of L_msu0() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : LU_shl |
| |
| Purpose : |
| |
| Arithmetically shift the 32 bit input L_var1 left var2 positions. Zero |
| fill the var2 LSB of the result. If var2 is negative, arithmetically |
| shift L_var1 right by -var2 with sign extension. Saturate the result in |
| case of underflows or overflows. |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| L_var1 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| 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. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(UWord32) LU_shl (UWord32 L_var1, Word16 var2)
{
Word16 neg_var2;
UWord32 L_var_out = 0;
if (var2 <= 0)
{
if (var2 < -32)
var2 = -32;
neg_var2 = negate(var2);
L_var_out = LU_shr (L_var1, neg_var2);
#if (WMOPS)
multiCounter[currCounter].negate--;
multiCounter[currCounter].LU_shr--;
#endif
}
else
{
for (; var2 > 0; var2--)
{
if (L_var1 > (UWord32) 0X7fffffffL)
{
SET_OVERFLOW(1);
L_var_out = UMAX_32;
break;
}
else
{
if (L_var1 < (UWord32) 0x00000001L)
{
SET_OVERFLOW(1);
L_var_out = (UWord32)MIN_32;
break;
}
}
L_var1 *= 2;
L_var_out = L_var1;
}
}
#if (WMOPS)
multiCounter[currCounter].LU_shl++;
#endif
return (L_var_out);
}
/* ------------------------- End of LU_shl() ------------------------- */
/*___________________________________________________________________________
| |
| Function Name : LU_shr |
| |
| Purpose : |
| |
| Arithmetically shift the 32 bit input L_var1 right var2 positions with |
| sign extension. If var2 is negative, arithmetically shift L_var1 left |
| by -var2 and zero fill the -var2 LSB of the result. Saturate the result |
| in case of underflows or overflows. |
| |
| Complexity weight : 2 |
| |
| Inputs : |
| |
| L_var1 32 bit long signed integer (Word32) whose value falls in the |
| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| |
| 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. |
|___________________________________________________________________________|
*/
LIBG7221_DEF(UWord32) LU_shr (UWord32 L_var1, Word16 var2)
{
Word16 neg_var2;
UWord32 L_var_out;
if (var2 < 0)
{
if (var2 < -32)
var2 = -32;
neg_var2 = negate(var2);
L_var_out = LU_shl (L_var1, neg_var2);
#if (WMOPS)
multiCounter[currCounter].negate--;
multiCounter[currCounter].LU_shl--;
#endif
}
else
{
if (var2 >= 32)
{
L_var_out = 0L;
}
else
{
L_var_out = L_var1 >> var2;
}
}
#if (WMOPS)
multiCounter[currCounter].LU_shr++;
#endif
return (L_var_out);
}
/* ------------------------- End of LU_shr() ------------------------- */
#endif /* PJMEDIA_LIBG7221_FUNCS_INLINED */
/* ************************** END OF BASOP32.C ************************** */
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