x87 FP hasn’t been standardized or added to any ARM cpu. What was added is a mode where underflow is detected “after rounding” (as x86 SSE/AVX instructions use)

x87 FP hasn’t been standardized or added to any ARM cpu. What was added is a mode where underflow is detected “after rounding” (as x86 SSE/AVX instructions use) rather than “before rounding” (what all ARM FP instructions default to).