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qmk_firmware

custom branch of QMK firmware git clone https://anongit.hacktivis.me/git/qmk_firmware.git

bits.h (1084B)

    

  1. /* SPDX-License-Identifier: GPL-2.0 */
  3. #pragma once
  5. #include <stdint.h>
  7. /* Remove these once we transitioned to C23 across all platforms */
  8. #define UINT32_WIDTH 32
  9. #define UINT64_WIDTH 64
  11. /**
  12.  *  @brief Mask for the little endian nth bit (0-31) in a 32-bit integer.
  13.  */
  14. #define BIT32(n) (UINT32_C(1) << (n))
  16. /**
  17.  * @brief Mask for the little endian nth bit (0-63) in a 64-bit integer.
  18.  */
  19. #define BIT64(n) (UINT64_C(1) << (n))
  21. /**
  22.  * @brief Create a contiguous 32-bit wide bitmask starting at bit position @l
  23.  * and ending at position @h. The range is inclusive, meaning GENMASK32(20, 10)
  24.  * gives us the 32-bit mask 0x001ffc00.
  25.  */
  26. #define GENMASK32(h, l) (((~UINT32_C(0)) - (UINT32_C(1) << (l)) + 1) & (~UINT32_C(0) >> (UINT32_WIDTH - 1 - (h))))
  28. /**
  29.  * @brief Create a contiguous 64-bit wide bitmask starting at bit position @l
  30.  * and ending at position @h. The range is inclusive, meaning GENMASK64(39, 21)
  31.  * gives us the 64-bit mask 0x000000ffffe00000.
  32.  */
  33. #define GENMASK64(h, l) (((~UINT64_C(0)) - (UINT64_C(1) << (l)) + 1) & (~UINT64_C(0) >> (UINT64_WIDTH - 1 - (h))))