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What is the floating point control word?
by andi999 6y ago
What is the floating point control word?
- adrian_b 6y agoThe floating point control word is a register in the Intel 8087 FP coprocessor and in all later Intel/AMD/etc. processors that implement the 8087 instruction set. That register contains bits that control various aspects of how the floating-point instructions must behave, e.g. rounding mode, precision and exception masks (also infinity type in coprocessors older than 80387). For the later SSE/AVX instruction sets there is another register with similar control bits for the SSE/AVX instructions.