-| 0b000 | IEEE754 | correctly rounded |
-| 0b010 | ULP<1 | Unit Last Place < 1 |
-| 0b100 | Vulkan | Vulkan compliant |
-| 0b110 | Appx | Machine Learning |
+| 0b00H | IEEE754 | correctly rounded |
+| 0b01H | ULP<1 | Unit Last Place < 1 |
+| 0b10H | Vulkan | Vulkan compliant |
+| 0b11H | Appx | Machine Learning |
+
+When bit 0 (H) of facc is set to zero, half-precision mode is disabled. When set, an automatic down conversion (FCVT) to half the instruction bitwidth (FP32 opcode would convert to FP16) on operands is performed, followed by the operation occuring at half precision, followed by automatic up conversion back to the instruction's bitwidth.