RSQRTSS
Usage: RSQRTPS dest,src Modifies flags: None
Computes an approximate reciprocal of the square root of the low single-precision floating-point value in the 'src' (second operand) stores the single-precision floating-point result in the 'dest' operand.
Scalar Single-Precision FP Square Root Reciprocal
RSQRTSS xmm1,xmm2/m128 ; F3 0F 52 /r [KATMAI,SSE]
RSQRTSS returns an approximation of the reciprocal of the square root of the lowest order single-precision FP value from the source, and stores it in the low doubleword of the destination register. The upper three fields of xmm1 are preserved. The maximum error for this approximation is: |Error| <= 1.5 x 2^-12
The 'src' operand can be an XMM register or a 32-bit memory location. The 'dest' operand is an XMM register. The three high-order double-words of the 'dest' operand remain unchanged.
EXAMPLE:
rsqrtss xmm1 Label