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Extract MPI_CORE(sub_int) from the prototype

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Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
This commit is contained in:
Hanno Becker 2022-08-25 08:25:19 +01:00 committed by Tom Cosgrove
parent 0fc88779ec
commit d9b2348d8f
2 changed files with 33 additions and 0 deletions
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15
library/bignum_core.c
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@ -590,6 +590,21 @@ cleanup:
/* BEGIN MERGE SLOT 3 */
mbedtls_mpi_uint MPI_CORE(sub_int)( mbedtls_mpi_uint *d,
const mbedtls_mpi_uint *l,
mbedtls_mpi_uint c, size_t n )
{
for( size_t i = 0; i < n; i++ )
{
mbedtls_mpi_uint s, t;
s = l[i];
t = s - c; c = ( t > s );
d[i] = t;
}
return( c );
}
/* END MERGE SLOT 3 */
/* BEGIN MERGE SLOT 4 */

18
library/bignum_core.h
View file

@ -504,6 +504,24 @@ int mbedtls_mpi_core_fill_random( mbedtls_mpi_uint *X, size_t X_limbs,
/* BEGIN MERGE SLOT 3 */
#define MPI_CORE(func) mbedtls_mpi_core_ ## func ## _minimal
/**
* \brief Subtract unsigned integer from known-size large unsigned integers.
* Return the borrow.
*
* \param[out] d The result of the subtraction.
* \param[in] l The left operand.
* \param[in] r The unsigned scalar to subtract.
* \param n Number of limbs of \p d and \p l.
*
* \return 1 if `l < r`.
* 0 if `l >= r`.
*/
mbedtls_mpi_uint MPI_CORE(sub_int)( mbedtls_mpi_uint *d,
const mbedtls_mpi_uint *l,
mbedtls_mpi_uint r, size_t n );
/* END MERGE SLOT 3 */
/* BEGIN MERGE SLOT 4 */