# 浮点数标准一览 | 格式名称 | 阶-尾 | 符号位长 | 阶数位长 | 尾数位长 | 总位长 | | --- | --- | --- | --- | --- | --- | | IEEE FP128 | e15m112 | 1 | 15 | 112 | 128 | | x87 FP80 | \- | 1 | 15 | 1+63 | 80 | | IEEE FP64 | e11m52 | 1 | 11 | 52 | 64 | | IEEE FP32 | e8m23 | 1 | 8 | 23 | 32 | | TensorFloat32 | e8m10 | 1 | 8 | 10 | 19 | | BrainFloat16 | e8m7 | 1 | 8 | 7 | 16 | | IEEE FP16 | e5m10 | 1 | 5 | 10 | 16 | | MiniFloat | e4m3 | 1 | 4 | 3 | 8 | | \- | e5m2 | 1 | 5 | 2 | 8 |