DSC中mult用法
请教一下，在CodeWarrior中自带的一个函数mult作用是啥，本以为是乘法，但经运行发现不是。下面是帮助文档中的说明。
mult
Multiply two 16-bit fractional values and truncate into a 16-bit fractional result. Saturates only for the case of 0x8000 x 0x8000. When an accumulator is the destination, zeroes out the LSP portion.
Assumptions
OMR's SA bit was set to 1 at least three cycles before this code, that is, saturation on data ALU results enabled.
Prototype
Word16 mult(Word16 sinp1, Word16 sinp2)
Example
short s1 = 0x2000;/*0.25 */
short s2 = 0x2000;/*0.25 */
short result;
result = mult(s1,s2);
// Expected value of result: 0.625 = 0x0800 应该是两个数相乘，然后取最高16位。 电子小生 发表于 2015-4-23 17:37
应该是两个数相乘，然后取最高16位。
分数
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