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Use mbedtls_ct_mpi_uint_mask() rather than rolling our own

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Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
This commit is contained in:
Tom Cosgrove 2022-09-15 15:00:07 +01:00
parent 818d992cc7
commit 2701deaa4b
1 changed files with 2 additions and 13 deletions
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15
library/bignum_core.c
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@ -300,19 +300,8 @@ mbedtls_mpi_uint mbedtls_mpi_core_add_if( mbedtls_mpi_uint *A,
{ {
mbedtls_mpi_uint c = 0; mbedtls_mpi_uint c = 0;
/* MSVC has a warning about unary minus on unsigned integer types, /* all-bits 0 if cond is 0, all-bits 1 if cond is non-0 */
* but this is well-defined and precisely what we want to do here. */ const mbedtls_mpi_uint mask = mbedtls_ct_mpi_uint_mask( cond );
#if defined(_MSC_VER)
#pragma warning( push )
#pragma warning( disable : 4146 )
#endif
/* all-bits 1 if cond is 1, all-bits 0 if cond is 0 */
const mbedtls_mpi_uint mask = -(mbedtls_mpi_uint)cond;
#if defined(_MSC_VER)
#pragma warning( pop )
#endif
for( size_t i = 0; i < limbs; i++ ) for( size_t i = 0; i < limbs; i++ )
{ {