Figure 1-2, Simd instruction register usage -4, Registers (see figure 1-2) – Intel ARCHITECTURE IA-32 User Manual
Page 32: Bit xmm registers (see figure 1-2)
IA-32 Intel® Architecture Optimization
1-4
SIMD improves the performance of 3D graphics, speech recognition,
image processing, scientific applications and applications that have the
following characteristics:
•
inherently parallel
•
recurring memory access patterns
•
localized recurring operations performed on the data
•
data-independent control flow
SIMD floating-point instructions fully support the IEEE Standard 754
for Binary Floating-Point Arithmetic. They are accessible from all
IA-32 execution modes: protected mode, real address mode, and Virtual
8086 mode.
SSE, SSE2, and MMX technologies are architectural extensions in the
IA-32 Intel architecture. Existing software will continue to run
correctly, without modification on IA-32 microprocessors that
incorporate these technologies. Existing software will also run correctly
in the presence of applications that incorporate SIMD technologies.
Figure 1-2
SIMD Instruction Register Usage
MM7
MM6
MM7
MM3
MM2
MM1
MM0
MM5
MM4
MM7
XMM6
XMM7
XMM3
XMM2
XMM1
XMM0
XMM5
XMM4
64-bit M M X Registers
128-bit XM M R egisters
O M 15149