From 1ecee352f5844b0809d7ae66df52e34f42b44c8e Mon Sep 17 00:00:00 2001 From: Ben Bridle Date: Thu, 6 Mar 2025 20:33:27 +1300 Subject: Rewrite entire assembler The language is now more general, the code is better structured, error reporting is more detailed, and many new language features have been implemented: - conditional blocks - first-class strings - more expression operators - binary literals - negative values - invocations in constant expressions --- src/formats/raw.rs | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 src/formats/raw.rs (limited to 'src/formats/raw.rs') diff --git a/src/formats/raw.rs b/src/formats/raw.rs new file mode 100644 index 0000000..ecc6473 --- /dev/null +++ b/src/formats/raw.rs @@ -0,0 +1,29 @@ +use crate::*; + + +pub fn format_raw(segments: &[Segment], width: Option) -> Result, FormatError> { + let Some(width) = width.or_else(|| calculate_fixed_width(&segments)) else { + return Err(FormatError::ExpectedFixedWidth); + }; + + let mut address = 0; + let bytes_per_word = ((width + 7) / 8) as usize; + let mut bytes = Vec::new(); + + for segment in segments { + // Pad to the segment start address. + let padding = segment.address.saturating_sub(address); + bytes.resize(bytes.len() + (padding * bytes_per_word), 0); + for word in &segment.words { + // Decompose word value into bytes. + let value = word.value.value; + for i in (0..bytes_per_word).rev() { + let byte = (value >> (i*8) & 0xff) as u8; + bytes.push(byte); + } + address += 1; + } + } + + return Ok(bytes); +} -- cgit v1.2.3-70-g09d2