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Merge pull request #7932 from AgathiyanB/add-mpi-uint-size-macro

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Use compile-time determination of which __builtin_clz() to use, with new MBEDTLS_MPI_UINT_SIZE macro
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Dave Rodgman 2023-07-19 14:57:39 +01:00 committed by GitHub
commit 6dd40642e8
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 15 additions and 14 deletions
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5
include/mbedtls/bignum.h
View file

@ -129,6 +129,7 @@
#endif /* !MBEDTLS_HAVE_INT64 */
typedef int64_t mbedtls_mpi_sint;
typedef uint64_t mbedtls_mpi_uint;
#define MBEDTLS_MPI_UINT_MAX UINT64_MAX
#elif defined(__GNUC__) && ( \
defined(__amd64__) || defined(__x86_64__) || \
defined(__ppc64__) || defined(__powerpc64__) || \
@ -141,6 +142,7 @@ typedef uint64_t mbedtls_mpi_uint;
#endif /* MBEDTLS_HAVE_INT64 */
typedef int64_t mbedtls_mpi_sint;
typedef uint64_t mbedtls_mpi_uint;
#define MBEDTLS_MPI_UINT_MAX UINT64_MAX
#if !defined(MBEDTLS_NO_UDBL_DIVISION)
/* mbedtls_t_udbl defined as 128-bit unsigned int */
typedef unsigned int mbedtls_t_udbl __attribute__((mode(TI)));
@ -156,6 +158,7 @@ typedef unsigned int mbedtls_t_udbl __attribute__((mode(TI)));
#endif /* !MBEDTLS_HAVE_INT64 */
typedef int64_t mbedtls_mpi_sint;
typedef uint64_t mbedtls_mpi_uint;
#define MBEDTLS_MPI_UINT_MAX UINT64_MAX
#if !defined(MBEDTLS_NO_UDBL_DIVISION)
/* mbedtls_t_udbl defined as 128-bit unsigned int */
typedef __uint128_t mbedtls_t_udbl;
@ -165,6 +168,7 @@ typedef __uint128_t mbedtls_t_udbl;
/* Force 64-bit integers with unknown compiler */
typedef int64_t mbedtls_mpi_sint;
typedef uint64_t mbedtls_mpi_uint;
#define MBEDTLS_MPI_UINT_MAX UINT64_MAX
#endif
#endif /* !MBEDTLS_HAVE_INT32 */
@ -175,6 +179,7 @@ typedef uint64_t mbedtls_mpi_uint;
#endif /* !MBEDTLS_HAVE_INT32 */
typedef int32_t mbedtls_mpi_sint;
typedef uint32_t mbedtls_mpi_uint;
#define MBEDTLS_MPI_UINT_MAX UINT32_MAX
#if !defined(MBEDTLS_NO_UDBL_DIVISION)
typedef uint64_t mbedtls_t_udbl;
#define MBEDTLS_HAVE_UDBL

24
library/bignum_core.c
View file

@ -36,22 +36,17 @@
size_t mbedtls_mpi_core_clz(mbedtls_mpi_uint a)
{
#if defined(__has_builtin)
#if __has_builtin(__builtin_clz)
if (sizeof(mbedtls_mpi_uint) == sizeof(unsigned int)) {
return (size_t) __builtin_clz(a);
}
#endif
#if __has_builtin(__builtin_clzl)
if (sizeof(mbedtls_mpi_uint) == sizeof(unsigned long)) {
return (size_t) __builtin_clzl(a);
}
#endif
#if __has_builtin(__builtin_clzll)
if (sizeof(mbedtls_mpi_uint) == sizeof(unsigned long long)) {
return (size_t) __builtin_clzll(a);
}
#if (MBEDTLS_MPI_UINT_MAX == UINT_MAX) && __has_builtin(__builtin_clz)
#define core_clz __builtin_clz
#elif (MBEDTLS_MPI_UINT_MAX == ULONG_MAX) && __has_builtin(__builtin_clzl)
#define core_clz __builtin_clzl
#elif (MBEDTLS_MPI_UINT_MAX == ULLONG_MAX) && __has_builtin(__builtin_clzll)
#define core_clz __builtin_clzll
#endif
#endif
#if defined(core_clz)
return (size_t) core_clz(a);
#else
size_t j;
mbedtls_mpi_uint mask = (mbedtls_mpi_uint) 1 << (biL - 1);
@ -64,6 +59,7 @@ size_t mbedtls_mpi_core_clz(mbedtls_mpi_uint a)
}
return j;
#endif
}
size_t mbedtls_mpi_core_bitlen(const mbedtls_mpi_uint *A, size_t A_limbs)