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30 lines
544 B
30 lines
544 B
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#include <stdint.h>
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#include "platform.h"
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#include "primitives.h"
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struct uint192
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softfloat_sub192(
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uint64_t a128,
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uint64_t a64,
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uint64_t a0,
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uint64_t b128,
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uint64_t b64,
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uint64_t b0
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)
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{
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struct uint192 z;
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unsigned int borrow64, borrow128;
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z.v0 = a0 - b0;
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borrow64 = ( a0 < b0 );
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z.v64 = a64 - b64;
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borrow128 = ( a64 < b64 );
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z.v128 = a128 - b128;
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borrow128 += ( z.v64 < borrow64 );
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z.v64 -= borrow64;
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z.v128 -= borrow128;
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return z;
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}
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