46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
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* StarKernel Q48.16 fixed-point stubs
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*
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* Minimal implementations for kernel build - floating point
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* conversion is not needed for core VM operation.
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*/
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#include "q48_16.h"
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/*
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* @brief Convert a @c double to Q48.16 fixed-point (kernel stub — always 0).
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*
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* Floating-point arithmetic is unavailable in the freestanding kernel build,
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* so this function is a deliberate no-op stub. It discards @p d and returns
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* a zero-valued @c q48_16_t. Shared VM code that calls @c q48_from_double()
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* only uses it for logging and diagnostic output (e.g., @c WORD-ENTROPY),
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* which are suppressed in the kernel build, so the zero return is safe.
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*
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* @param d Floating-point value to convert (ignored).
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* @return Zero-valued @c q48_16_t.
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*/
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q48_16_t q48_from_double(double d)
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{
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(void)d;
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q48_16_t zero = {0};
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return zero;
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}
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/*
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* @brief Convert a Q48.16 fixed-point value to @c double (kernel stub — always 0.0).
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*
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* Floating-point arithmetic is unavailable in the freestanding kernel build,
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* so this function is a deliberate no-op stub. It discards @p q and returns
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* @c 0.0. Shared VM code that calls @c q48_to_double() only uses the result
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* for logging and RStudio/CSV export paths that are inactive in the kernel
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* build, so the zero return is safe.
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*
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* @param q Q48.16 value to convert (ignored).
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* @return @c 0.0 always.
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*/
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double q48_to_double(q48_16_t q)
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{
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(void)q;
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return 0.0;
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}
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