18.2: Floating-Point Registers
- Page ID
- 19975
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There are a set of dedicated registers, referred to as XMM registers, used to support floating-point operations. Floating-point operations must use the floating-point registers. The XMM registers are 128-bits and 256-bits on the later processors. Initially, we will only use the lower 32 or 64-bits.
There are 16 XMM registers, named xmm0 through xmm15. Refer to Chapter 2 for an explanation and summary of the CPU registers.