Move mbedtls_mpi_core_shift_r to the proper source file
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/library/bignum_core.c b/library/bignum_core.c
index 89fd404..0083729 100644
--- a/library/bignum_core.c
+++ b/library/bignum_core.c
@@ -316,6 +316,52 @@
return( 0 );
}
+
+
+void mbedtls_mpi_core_shift_r( mbedtls_mpi_uint *X, size_t limbs,
+ size_t count )
+{
+ size_t i, v0, v1;
+ mbedtls_mpi_uint r0 = 0, r1;
+
+ v0 = count / biL;
+ v1 = count & (biL - 1);
+
+ if( v0 > limbs || ( v0 == limbs && v1 > 0 ) )
+ {
+ memset( X, 0, limbs * ciL );
+ return;
+ }
+
+ /*
+ * shift by count / limb_size
+ */
+ if( v0 > 0 )
+ {
+ for( i = 0; i < limbs - v0; i++ )
+ X[i] = X[i + v0];
+
+ for( ; i < limbs; i++ )
+ X[i] = 0;
+ }
+
+ /*
+ * shift by count % limb_size
+ */
+ if( v1 > 0 )
+ {
+ for( i = limbs; i > 0; i-- )
+ {
+ r1 = X[i - 1] << (biL - v1);
+ X[i - 1] >>= v1;
+ X[i - 1] |= r0;
+ r0 = r1;
+ }
+ }
+}
+
+
+
mbedtls_mpi_uint mbedtls_mpi_core_add_if( mbedtls_mpi_uint *X,
const mbedtls_mpi_uint *A,
size_t limbs,