зеркало из https://github.com/Azure/c-pal.git
40 строки
840 B
Markdown
40 строки
840 B
Markdown
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# arithmetic
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## Overview
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The `arithmetic` module provides a platform/compiler-independent API for arithemtic operations on 128 bit numbers.
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-`umul64x64`: multiplies two uint64_t.
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## Exposed API
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```c
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typedef struct PAL_UINT128_TAG
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{
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uint64_t high;
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uint64_t low;
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}PAL_UINT128;
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#include "umock_c/umock_c_prod.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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MOCKABLE_FUNCTION(, PAL_UINT128, umul64x64, uint64_t, left, uint64_t, right);
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#ifdef __cplusplus
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}
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#endif
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```
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## umul64x64
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```c
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MOCKABLE_FUNCTION(, PAL_UINT128, umul64x64, uint64_t, left, uint64_t, right);
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```
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`umul64x64` multiplies `left` with `right` and outputs a `PAL_UINT128` that contains the high and low parts of the resulting 128 bit value.
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**SRS_ARITHMETIC_02_001: [** `umul64x64` shall mutiply `left` and `right` and returna `PAL_UINT128` as result. **]**
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