diff options
| author | Minos Galanakis <minos.galanakis@arm.com> | 2021-12-08 17:38:07 +0000 |
|---|---|---|
| committer | Minos Galanakis <minos.galanakis@arm.com> | 2021-12-10 15:57:54 +0000 |
| commit | 5c93a9f2145d55b217956a569e9778eae5cebaad (patch) | |
| tree | f34fd1b3cb0904368b0de2c8cdfa6cebd051a0b2 | |
| parent | 582f2398d44bc36ce49adb592f808cccfb1b548f (diff) | |
| download | mbedtls-5c93a9f2145d55b217956a569e9778eae5cebaad.zip mbedtls-5c93a9f2145d55b217956a569e9778eae5cebaad.tar.gz mbedtls-5c93a9f2145d55b217956a569e9778eae5cebaad.tar.bz2 | |
Update changelog & readme
This patch adds explicit wording to state
that Two's complement is the official
supported signed integer representation.
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
| -rw-r--r-- | ChangeLog.d/twos_complement_representation.txt | 3 | ||||
| -rw-r--r-- | README.md | 8 |
2 files changed, 11 insertions, 0 deletions
diff --git a/ChangeLog.d/twos_complement_representation.txt b/ChangeLog.d/twos_complement_representation.txt new file mode 100644 index 0000000..fa49859 --- /dev/null +++ b/ChangeLog.d/twos_complement_representation.txt @@ -0,0 +1,3 @@ +Requirement changes + * Sign-magnitude and one's complement representations for signed integers are + not supported. Two's complement is the only supported representation. @@ -197,6 +197,14 @@ Mbed TLS can be ported to many different architectures, OS's and platforms. Befo - [What external dependencies does Mbed TLS rely on?](https://tls.mbed.org/kb/development/what-external-dependencies-does-mbedtls-rely-on) - [How do I configure Mbed TLS](https://tls.mbed.org/kb/compiling-and-building/how-do-i-configure-mbedtls) +Mbed TLS is mostly written in portable C99; however, it has a few platform requirements that go beyond the standard, but are met by most modern architectures: + +- Bytes must be 8 bits. +- All-bits-zero must be a valid representation of a null pointer. +- Signed integers must be represented using two's complement. +- `int` and `size_t` must be at least 32 bits wide. +- The types `uint8_t`, `uint16_t`, `uint32_t` and their signed equivalents must be available. + PSA cryptography API -------------------- |