Volume 3: General-Purpose and System Instructions - Stanford ...

AMD64 Technology 24594 Rev. 3.10 February 2005Figure 2-3) and the MMX registers (Figure 2-10 on page 38) orset or clear flags in the rFLAGS register (see Figure 2-2 andFigure 2-3).XMM Data Registers127 0xmm0xmm1xmm2xmm3xmm4xmm5xmm6xmm7xmm8xmm9xmm10xmm11xmm12xmm13xmm14xmm15Available in all modesAvailable only in 64-bit mode128-Bit Media Control and Status RegisterMXCSR31 0513-314.epsFigure 2-8.128-Bit Media RegistersData Types. Figure 2-9 on page 37 shows the 128-bit media datatypes. They include floating-point and integer vectors andfloating-point scalars. The floating-point data types includeIEEE-754 single precision and double precision types.36 Chapter 2: Instruction Overview