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nak: Encode LDC directly

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This instruction is so restricted that encode_alu() really isn't gaining
us much so we may as well just type it out.  Also, the bindless version
is quite a bit different and doesn't follow the ALU patterns so it'll
make more sense to do it this way long-term.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29393>
This commit is contained in:
Faith Ekstrand 2024-05-24 18:43:26 -05:00 • committed by Marge Bot
parent 4366d4d181
commit 67a3c81286
1 changed files with 14 additions and 7 deletions
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21
src/nouveau/compiler/nak/encode_sm70.rs
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@ -1817,13 +1817,20 @@ impl SM70Instr {
}
fn encode_ldc(&mut self, op: &OpLdc) {
self.encode_alu(
0x182,
Some(op.dst),
ALUSrc::from_src(&op.offset),
ALUSrc::from_src(&op.cb),
ALUSrc::None,
);
let SrcRef::CBuf(cb) = &op.cb.src_ref else {
panic!("LDC must take a cbuf source");
};
let CBuf::Binding(idx) = cb.buf else {
todo!("Implement bindless LDC");
};
self.set_opcode(0xb82);
self.set_dst(op.dst);
self.set_reg_src(24..32, op.offset);
self.set_field(38..54, cb.offset);
self.set_field(54..59, idx);
self.set_mem_type(73..76, op.mem_type);
self.set_field(