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nak: Break indirect offset encoding into a helper

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24998>
This commit is contained in:
Faith Ekstrand 2023-09-28 18:19:47 -05:00 • committed by Marge Bot
parent 2a61e59bba
commit cc6f26b005
1 changed files with 20 additions and 12 deletions
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32
src/nouveau/compiler/nak_encode_sm75.rs
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@ -1549,25 +1549,33 @@ impl SM75Instr {
self.set_bit(80, false); /* .SC */
}
fn set_rel_offset(
&mut self,
range: Range<usize>,
label: &Label,
ip: usize,
labels: &HashMap<Label, usize>,
) {
let ip = u64::try_from(ip).unwrap();
let ip = i64::try_from(ip).unwrap();
let target_ip = *labels.get(label).unwrap();
let target_ip = u64::try_from(target_ip).unwrap();
let target_ip = i64::try_from(target_ip).unwrap();
let rel_offset = target_ip - ip - 4;
self.set_field(range, rel_offset);
}
fn encode_bra(
&mut self,
op: &OpBra,
ip: usize,
labels: &HashMap<Label, usize>,
) {
let ip = u64::try_from(ip).unwrap();
assert!(ip < i64::MAX as u64);
let ip = ip as i64;
let target_ip = *labels.get(&op.target).unwrap();
let target_ip = u64::try_from(target_ip).unwrap();
assert!(target_ip < i64::MAX as u64);
let target_ip = target_ip as i64;
let rel_offset = target_ip - ip - 4;
self.set_opcode(0x947);
self.set_field(34..82, rel_offset);
self.set_rel_offset(34..82, &op.target, ip, labels);
self.set_field(87..90, 0x7_u8); /* TODO: Pred? */
}