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| author | Michael Brown <mcb30@ipxe.org> | 2025-02-13 14:18:15 +0000 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2025-02-13 15:25:35 +0000 |
| commit | 5056e8ad936742ba410031cff14c0f72d87805fc (patch) | |
| tree | 843fe48d0e4eeea4d78e4c30e31c16268def5ff3 /src/include | |
| parent | bd90abf487a6b0500f457193f86ff54fd2be3143 (diff) | |
| download | ipxe-5056e8ad936742ba410031cff14c0f72d87805fc.tar.gz | |
[crypto] Expose shifted out bit from big integer shifts
Expose the bit shifted out as a result of shifting a big integer left
or right.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/bigint.h | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/include/ipxe/bigint.h b/src/include/ipxe/bigint.h index 410d0fd90..d8f4571e3 100644 --- a/src/include/ipxe/bigint.h +++ b/src/include/ipxe/bigint.h @@ -105,21 +105,23 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); * Shift big integer left * * @v value Big integer + * @ret out Bit shifted out */ -#define bigint_shl( value ) do { \ +#define bigint_shl( value ) ( { \ unsigned int size = bigint_size (value); \ bigint_shl_raw ( (value)->element, size ); \ - } while ( 0 ) + } ) /** * Shift big integer right * * @v value Big integer + * @ret out Bit shifted out */ -#define bigint_shr( value ) do { \ +#define bigint_shr( value ) ( { \ unsigned int size = bigint_size (value); \ bigint_shr_raw ( (value)->element, size ); \ - } while ( 0 ) + } ) /** * Test if big integer is equal to zero @@ -413,8 +415,8 @@ int bigint_add_raw ( const bigint_element_t *addend0, bigint_element_t *value0, unsigned int size ); int bigint_subtract_raw ( const bigint_element_t *subtrahend0, bigint_element_t *value0, unsigned int size ); -void bigint_shl_raw ( bigint_element_t *value0, unsigned int size ); -void bigint_shr_raw ( bigint_element_t *value0, unsigned int size ); +int bigint_shl_raw ( bigint_element_t *value0, unsigned int size ); +int bigint_shr_raw ( bigint_element_t *value0, unsigned int size ); int bigint_is_zero_raw ( const bigint_element_t *value0, unsigned int size ); int bigint_is_geq_raw ( const bigint_element_t *value0, const bigint_element_t *reference0, |