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Floating-pointinstructions that update the condition flags

The only A32/T32 floating-point instructions that can update the condition flags are VCMP and VCMPE. Other floating-point or Advanced SIMD instructions cannot modify the flags.

VCMP and VCMPE donot update the flags directly, but update a separate set of flagsin the Floating-Point Status and Control Register (FPSCR).To use these flags to control conditional instructions, includingconditional floating-point instructions, you must first update the conditionflags yourself. To do this, copy the flags from the FPSCR into theAPSR using a VMRS instruction:


All A64 floating-point comparison instructions can updatethe condition flags. These instructions update the flags directlyin the NZCV register.

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