//! Code generation module for GPU kernels

use crate::{CompilerError, Target};
use anyhow::Result;

/// Code generator for different GPU targets
pub struct CodeGenerator {
    target: Target,
}

impl CodeGenerator {
    /// Create new code generator
    pub fn new(target: Target) -> Self {
        Self { target }
    }

    /// Generate PTX code from IR
    pub fn generate_ptx(&self, _ir: &str) -> Result<String, CompilerError> {
        // Placeholder for actual code generation
        Ok(format!(
            ".version 8.5\n.target {}\n.address_size 64\n// Generated from IR",
            self.target.as_str()
        ))
    }

    /// Generate SASS code from PTX (NVIDIA only)
    pub fn generate_sass(&self, ptx: &str) -> Result<Vec<u8>, CompilerError> {
        match self.target {
            Target::SM120 | Target::SM90 => {
                // Would use ptxas for actual compilation
                Ok(ptx.as_bytes().to_vec())
            }
            Target::GFX942 => Err(CompilerError::InvalidKernelConfig(
                "SASS generation not supported for AMD GPUs".to_string(),
            )),
        }
    }
}