A.5.54 CVTTPS2PI: Packed Single-Precision FP to Packed Signed INT32
Conversion with Truncation
CVTTPS2PI mm,xmm/mem64 ; 0F 2C /r [KATMAI,SSE]
CVTTPS2PI converts two packed single-precision FP values in the source
operand to two packed signed doublewords in the destination operand. If
the result is inexact, it is truncated (rounded toward zero). If the
source is a register, the input values are in the low quadword.
The destination operand is an MMX register. The source can be either an
XMM register or a 64-bit memory location. If the source is a register,
the input value is in the low quadword.
For more details of this instruction, see the Intel Processor manuals.