ScalarCast

Atlas A3 training products/Atlas A3 inference products

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Atlas A2 training products/Atlas A2 inference products

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Atlas 200I/500 A2 inference products

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Atlas inference product's AI Core

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Atlas inference product's Vector Core

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Atlas training products

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T

Data type of valueIn. The value can be float.

U

Data type after conversion. The value can be half or int32_t.

roundMode

Precision conversion mode. The type is RoundMode.

RoundMode is an enumeration type used to control the precision conversion mode. The definition is as follows:

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enum class RoundMode {
    CAST_NONE = 0,  // If accuracy drop is involved during conversion, the CAST_RINT mode is used. If accuracy drop is not involved, the value is not rounded.
    CAST_RINT,      // rint, banker's rounding
    CAST_FLOOR,     // floor, rounding towards negative infinity
    CAST_CEIL,      // ceil, rounding towards positive infinity
    CAST_ROUND,     // round, rounding off
    CAST_TRUNC,     // trunc, rounding towards zero
    CAST_ODD,       // Von Neumann rounding, rounding to the nearest odd number
};

For ScalarCast, only float-to-half (f322f16) and float-to-int32_t (f322s32) conversion types are supported. The corresponding supported RoundMode values are as follows:

• f322f16: CAST_ODD;
• f322s32: CAST_ROUND, CAST_CEIL, CAST_FLOOR, and CAST_RINT.

The precision conversion rules of ScalarCast is the same as those of Cast. For details, see Table 1.

valueIn

Input

Scalar of the data type to be converted.