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nak: Replace OpBMov with OpBClear

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This is all we're using it for right now and an op that simply clears
has far more obvious semantics than something which reads from and then
clears its source.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26463>
This commit is contained in:
Faith Ekstrand 2023-12-04 09:02:31 -06:00 • committed by Marge Bot
parent 3348446422
commit 45686ec0ba
4 changed files with 18 additions and 92 deletions
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29
src/nouveau/compiler/nak_encode_sm70.rs
View file

@ -1664,32 +1664,13 @@ impl SM70Instr {
self.set_field(range, rel_offset);
}
fn encode_bmov(&mut self, op: &OpBMov) {
fn encode_bclear(&mut self, op: &OpBClear) {
self.set_opcode(0x355);
self.set_dst(op.dst);
let src = match op.src {
BMovSrc::Barrier(bar) => bar.idx(),
BMovSrc::TreadStateEnum0 => 0x10,
BMovSrc::TreadStateEnum1 => 0x11,
BMovSrc::TreadStateEnum2 => 0x12,
BMovSrc::TreadStateEnum3 => 0x13,
BMovSrc::TreadStateEnum4 => 0x14,
BMovSrc::TrapReturnPCLo => 0x15,
BMovSrc::TrapReturnPCHi => 0x16,
BMovSrc::TrapReturnMask => 0x17,
BMovSrc::MExited => 0x18,
BMovSrc::MKill => 0x19,
BMovSrc::MActive => 0x1a,
BMovSrc::MAtExit => 0x1b,
BMovSrc::OptStack => 0x1c,
BMovSrc::APICallDepth => 0x1d,
BMovSrc::AtExitPCLo => 0x1e,
BMovSrc::AtExitPCHi => 0x1f,
};
self.set_field(24..29, src);
self.set_dst(Dst::None);
self.set_field(24..28, op.dst.idx());
self.set_bit(84, op.clear);
self.set_bit(84, true); // .CLEAR
}
fn encode_break(&mut self, op: &OpBreak) {
@ -1927,7 +1908,7 @@ impl SM70Instr {
Op::LdTram(op) => si.encode_ldtram(&op),
Op::CCtl(op) => si.encode_cctl(&op),
Op::MemBar(op) => si.encode_membar(&op),
Op::BMov(op) => si.encode_bmov(&op),
Op::BClear(op) => si.encode_bclear(&op),
Op::Break(op) => si.encode_break(&op),
Op::BSSy(op) => si.encode_bssy(&op, ip, labels),
Op::BSync(op) => si.encode_bsync(&op),

12
src/nouveau/compiler/nak_from_nir.rs
View file

@ -1627,10 +1627,8 @@ impl<'a> ShaderFromNir<'a> {
let label = self.label_alloc.alloc();
let bar = self.bar_alloc.alloc();
let bmov = b.push_op(OpBMov {
dst: Dst::None,
src: BMovSrc::Barrier(bar),
clear: true,
let bmov = b.push_op(OpBClear {
dst: bar,
});
bmov.deps.yld = true;
@ -2542,10 +2540,8 @@ impl<'a> ShaderFromNir<'a> {
let label = self.label_alloc.alloc();
let bar = self.bar_alloc.alloc();
let bmov = b.push_op(OpBMov {
dst: Dst::None,
src: BMovSrc::Barrier(bar),
clear: true,
let bmov = b.push_op(OpBClear {
dst: bar,
});
bmov.deps.yld = true;

67
src/nouveau/compiler/nak_ir.rs
View file

@ -3601,69 +3601,18 @@ impl DisplayOp for OpMemBar {
}
impl_display_for_op!(OpMemBar);
#[allow(dead_code)]
pub enum BMovSrc {
Barrier(BarRef),
TreadStateEnum0,
TreadStateEnum1,
TreadStateEnum2,
TreadStateEnum3,
TreadStateEnum4,
TrapReturnPCLo,
TrapReturnPCHi,
TrapReturnMask,
MExited,
MKill,
MActive,
MAtExit,
OptStack,
APICallDepth,
AtExitPCLo,
AtExitPCHi,
}
impl fmt::Display for BMovSrc {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
BMovSrc::Barrier(bar) => bar.fmt(f),
BMovSrc::TreadStateEnum0 => write!(f, "THREAD_STATE_ENUM.0"),
BMovSrc::TreadStateEnum1 => write!(f, "THREAD_STATE_ENUM.1"),
BMovSrc::TreadStateEnum2 => write!(f, "THREAD_STATE_ENUM.2"),
BMovSrc::TreadStateEnum3 => write!(f, "THREAD_STATE_ENUM.3"),
BMovSrc::TreadStateEnum4 => write!(f, "THREAD_STATE_ENUM.4"),
BMovSrc::TrapReturnPCLo => write!(f, "TRAP_RETURN_PC.LO"),
BMovSrc::TrapReturnPCHi => write!(f, "TRAP_RETURN_PC.HI"),
BMovSrc::TrapReturnMask => write!(f, "TRAP_RETURN_MASK"),
BMovSrc::MExited => write!(f, "MEXITED"),
BMovSrc::MKill => write!(f, "MKILL"),
BMovSrc::MActive => write!(f, "MACTIVE"),
BMovSrc::MAtExit => write!(f, "MATEXIT"),
BMovSrc::OptStack => write!(f, "OPT_STACK"),
BMovSrc::APICallDepth => write!(f, "API_CALL_DEPTH"),
BMovSrc::AtExitPCLo => write!(f, "ATEXIT_PC.LO"),
BMovSrc::AtExitPCHi => write!(f, "ATEXIT_PC.HI"),
}
}
}
#[repr(C)]
#[derive(SrcsAsSlice, DstsAsSlice)]
pub struct OpBMov {
pub dst: Dst,
pub src: BMovSrc,
pub clear: bool,
pub struct OpBClear {
pub dst: BarRef,
}
impl DisplayOp for OpBMov {
impl DisplayOp for OpBClear {
fn fmt_op(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "bmov.32")?;
if self.clear {
write!(f, ".clear")?;
}
write!(f, " {} {}", self.dst, self.src)
write!(f, "bclear")
}
}
impl_display_for_op!(OpBMov);
impl_display_for_op!(OpBClear);
#[repr(C)]
#[derive(SrcsAsSlice, DstsAsSlice)]
@ -4347,7 +4296,7 @@ pub enum Op {
LdTram(OpLdTram),
CCtl(OpCCtl),
MemBar(OpMemBar),
BMov(OpBMov),
BClear(OpBClear),
Break(OpBreak),
BSSy(OpBSSy),
BSync(OpBSync),
@ -4706,6 +4655,7 @@ impl Instr {
| Op::MemBar(_)
| Op::Kill(_)
| Op::Nop(_)
| Op::BClear(_)
| Op::Break(_)
| Op::BSSy(_)
| Op::BSync(_)
@ -4716,7 +4666,6 @@ impl Instr {
| Op::FSOut(_)
| Op::Out(_)
| Op::OutFinal(_) => false,
Op::BMov(op) => !op.clear,
_ => true,
}
}
@ -4786,7 +4735,7 @@ impl Instr {
| Op::MemBar(_) => false,
// Control-flow ops
Op::BMov(_) | Op::Break(_) | Op::BSSy(_) | Op::BSync(_) => false,
Op::BClear(_) | Op::Break(_) | Op::BSSy(_) | Op::BSync(_) => false,
Op::Bra(_) | Op::Exit(_) => true,
Op::WarpSync(_) => false,

2
src/nouveau/compiler/nak_legalize.rs
View file

@ -259,7 +259,7 @@ fn legalize_instr(b: &mut impl SSABuilder, instr: &mut Instr) {
copy_src_if_not_reg(b, &mut op.handle, RegFile::GPR);
}
Op::Ldc(_) => (), // Nothing to do
Op::BMov(_) | Op::Break(_) | Op::BSSy(_) | Op::BSync(_) => (),
Op::Break(_) | Op::BSSy(_) | Op::BSync(_) => (),
Op::Vote(_) => (), // Nothing to do
Op::Copy(_) => (), // Nothing to do
_ => {