From ca5f4faba7859c9cc32351eaa134f39c3bb5a9d1 Mon Sep 17 00:00:00 2001 From: Ben Bridle Date: Mon, 7 Oct 2024 19:47:27 +1300 Subject: Export convenience macros for device implementations The macros are for reading and writing individual bytes of unsigned values, and for testing bitfields. --- src/lib.rs | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'src/lib.rs') diff --git a/src/lib.rs b/src/lib.rs index 131078d..8fd363e 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -10,3 +10,27 @@ pub use processor::Signal; pub use program_memory::ProgramMemory; pub use stack::Stack; +pub mod macros { + #[macro_export] + macro_rules! read_hh { ($v:expr) => { ($v>>24) as u8 }; } + #[macro_export] + macro_rules! read_hl { ($v:expr) => { ($v>>16) as u8 }; } + #[macro_export] + macro_rules! read_h { ($v:expr) => { ($v>>8) as u8 }; } + #[macro_export] + macro_rules! read_l { ($v:expr) => { $v as u8 }; } + #[macro_export] + macro_rules! read_b { ($v:expr) => { 0u8.wrapping_sub($v as u8) }; } + + #[macro_export] + macro_rules! write_hh { ($v:expr, $high:expr) => { $v = $v & 0x00ffffff | (($high as u32) << 24) }; } + #[macro_export] + macro_rules! write_hl { ($v:expr, $low:expr) => { $v = $v & 0xff00ffff | (($low as u32) << 16) }; } + #[macro_export] + macro_rules! write_h { ($v:expr, $high:expr) => { $v = $v & 0x00ff | (($high as u16) << 8) }; } + #[macro_export] + macro_rules! write_l { ($v:expr, $low:expr) => { $v = $v & 0xff00 | ($low as u16) }; } + + #[macro_export] + macro_rules! test_bit { ($v:expr, $mask:expr) => { $v & $mask != 0 }; } +} -- cgit v1.2.3-70-g09d2