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genisa: improve codegen

This commit is contained in:
Richard Patel 2022-04-07 01:55:07 +02:00
parent 95f93a761e
commit 1f5fec522a
2 changed files with 1423 additions and 4038 deletions
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5454
disasm/src/generated.rs
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File diff suppressed because it is too large Load Diff

7
genisa/src/main.rs
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@ -109,10 +109,11 @@ impl Field {
} }
fn express_value(&self, code: TokenStream) -> TokenStream { fn express_value(&self, code: TokenStream) -> TokenStream {
let mask_stop = self.bits.0.end; let shift = 32 - self.bits.0.end;
let mask_size = self.bits.0.len(); let mask = (1u32 << self.bits.0.len()) - 1;
let mask = LitInt::new(&format!("0x{:x}", mask), Span::call_site());
quote! { quote! {
(((#code) >> (32 - #mask_stop)) & ((1 << #mask_size) - 1)) ((#code >> #shift) & #mask)
} }
} }