brcmsmac/phy/phy_qmath.c

10  * To fit the output into 16 bits the 32 bit multiplication result is right
19  * Description: This function make 16 bit multiplication and return the result
20  * in 16 bits. To fit the multiplication result into 16 bits the multiplication
21  * result is right shifted by 15 bits. Right shifting 15 bits instead of 16 bits
28 	s32 result;
30 		result = 0x7fffffff;
32 		result = ((s32) (op1) * (s32) (op2));
34 	return (s16) (result >> 15);
39  * result. If the result overflow 32 bits, the output will be saturated to
44 	s32 result;
45 	result = op1 + op2;
46 	if (op1 < 0 && op2 < 0 && result > 0)
47 		result = 0x80000000;
48 	else if (op1 > 0 && op2 > 0 && result < 0)
49 		result = 0x7fffffff;
51 	return result;
56  * result. If the result overflow 16 bits, the output will be saturated to
61 	s16 result;
64 		result = (s16) 0x7fff;
66 		result = (s16) 0xffff8000;
68 		result = (s16) temp;
70 	return result;
75  * result. If the result overflow 16 bits, the output will be saturated to
80 	s16 result;
83 		result = (s16) 0x7fff;
85 		result = (s16) 0xffff8000;
87 		result = (s16) temp;
89 	return result;
95  * the specified shift is -ve. This function return the result after shifting
101 	s32 result;
102 	result = op;
109 			result = qm_add32(result, result);
111 		result = result >> (-shift);
114 	return result;
120  * the specified shift is -ve. This function return the result after shifting
126 	s16 result;
127 	result = op;
134 			result = qm_add16(result, result);
136 		result = result >> (-shift);
139 	return result;
145  * function return the result of the shift operation.
281 	/* normalize the result. */
294 	/* write the q format of the result. */