SIMT接口精度标准汇总
本节按照数据类型和接口类型对SIMT浮点计算接口进行精度标准的分类汇总。对于非软仿接口，给出对应硬件指令的精度标准；对于软仿接口，由于软仿程度较低且使用到的硬件指令较少，给出其所用硬件指令的综合性精度标准。
bf16数据类型计算API精度标准
数学库函数
| 接口 | 硬件指令精度标准 | 软仿精度标准 |
|---|---|---|
| hexp | - | 1-ulp，Not Support denormalized numbers |
| htanh | - | 1-ulp，Not Support denormalized numbers |
| hexp2 | - | 1-ulp，Not Support denormalized numbers |
| hexp10 | - | 1-ulp，Not Support denormalized numbers |
| hlog | - | 1-ulp，Not Support denormalized numbers |
| hlog2 | - | 1-ulp，Not Support denormalized numbers |
| hlog10 | - | 1-ulp，Not Support denormalized numbers |
| hsqrt | - | 1-ulp，Not Support denormalized numbers |
| hrsqrt | - | 1-ulp，Not Support denormalized numbers |
| h2tanh | - | 1-ulp，Not Support denormalized numbers |
| h2exp | - | 1-ulp，Not Support denormalized numbers |
| h2exp2 | - | 1-ulp，Not Support denormalized numbers |
| h2exp10 | - | 1-ulp，Not Support denormalized numbers |
| h2log | - | 1-ulp，Not Support denormalized numbers |
| h2log2 | - | 1-ulp，Not Support denormalized numbers |
| h2log10 | - | 1-ulp，Not Support denormalized numbers |
| h2sqrt | - | 1-ulp，Not Support denormalized numbers |
| h2rsqrt | - | 1-ulp，Not Support denormalized numbers |
算术函数
| 接口 | 硬件指令精度标准 | 软仿精度标准 |
|---|---|---|
| __habs | - | 0-ulp, Support denormalized numbers |
| __hadd | 0-ulp, Support denormalized numbers | - |
| __hmul | 0-ulp, Support denormalized numbers | - |
| __hdiv | 1-ulp，Not Support denormalized numbers | - |
| __haddx2 | 0-ulp, Support denormalized numbers | - |
| __hmulx2 | 0-ulp, Support denormalized numbers | - |
| __hdivx2 | 1-ulp，Not Support denormalized numbers | - |
fp16数据类型计算API精度标准
数学库函数
| 接口 | 硬件指令精度标准 | 软仿精度标准 |
|---|---|---|
| hexp | 1-ulp | - |
| hexp2 | - | 1-ulp，Not Support denormalized numbers |
| hexp10 | - | 1-ulp，Not Support denormalized numbers |
| hlog | 1-ulp，Not Support denormalized numbers | - |
| hlog2 | - | 1-ulp，Not Support denormalized numbers |
| hlog10 | - | 1-ulp，Not Support denormalized numbers |
| hsqrt | 1-ulp，Not Support denormalized numbers | - |
| hrsqrt | - | 1-ulp，Not Support denormalized numbers |
| h2tanh | - | 1-ulp，Not Support denormalized numbers |
| h2exp | - | 1-ulp，Not Support denormalized numbers |
| h2exp2 | - | 1-ulp，Not Support denormalized numbers |
| h2exp10 | - | 1-ulp，Not Support denormalized numbers |
| h2log | - | 1-ulp，Not Support denormalized numbers |
| h2log2 | - | 1-ulp，Not Support denormalized numbers |
| h2log10 | - | 1-ulp，Not Support denormalized numbers |
| h2sqrt | 1-ulp，Not Support denormalized numbers | - |
| h2rsqrt | - | 1-ulp，Not Support denormalized numbers |
算术函数
| 接口 | 硬件指令精度标准 | 软仿精度标准 |
|---|---|---|
| __hadd | 0-ulp, Support denormalized numbers | - |
| __hmul | 0-ulp, Support denormalized numbers | - |
| __hdiv | 1-ulp，Not Support denormalized numbers | - |
| __haddx2 | 0-ulp, Support denormalized numbers | - |
| __hmulx2 | 0-ulp, Support denormalized numbers | - |
| __hdivx2 | 1-ulp，Not Support denormalized numbers | - |
fp32数据类型计算API精度标准
| 接口 | 硬件指令精度标准 | 软仿精度标准 |
|---|---|---|
| expf | 1-ulp，Not Support denormalized numbers | - |
| tanhf | - | 1-ulp，Not Support denormalized numbers |
| tanpif | - | 1-ulp，Not Support denormalized numbers |
| atanf | - | 1-ulp，Not Support denormalized numbers |
| atan2f | - | 1-ulp，Not Support denormalized numbers |
| atanhf | - | 1-ulp，Not Support denormalized numbers |
| expm1f | - | 1-ulp，Not Support denormalized numbers |
| logf | - | 1-ulp，Not Support denormalized numbers |
| log2f | - | 1-ulp，Not Support denormalized numbers |
| log10f | - | 1-ulp，Not Support denormalized numbers |
| log1pf | - | 1-ulp，Not Support denormalized numbers |
| cosf | - | 1-ulp，Not Support denormalized numbers |
| acoshf | - | 1-ulp，Not Support denormalized numbers |
| sqrtf | 1-ulp，Not Support denormalized numbers | - |
| rsqrtf | - | 1-ulp，Not Support denormalized numbers |
| cbrtf | - | 1-ulp，Not Support denormalized numbers |
| rcbrtf | - | 1-ulp，Not Support denormalized numbers |
| remquof | - | 1-ulp，Not Support denormalized numbers |
| fdividef | 1-ulp，Not Support denormalized numbers | - |