diff options
Diffstat (limited to 'ptx/src/pass/emit_llvm.rs')
| -rw-r--r-- | ptx/src/pass/emit_llvm.rs | 80 |
1 files changed, 69 insertions, 11 deletions
diff --git a/ptx/src/pass/emit_llvm.rs b/ptx/src/pass/emit_llvm.rs index fa011a3..2d1269d 100644 --- a/ptx/src/pass/emit_llvm.rs +++ b/ptx/src/pass/emit_llvm.rs @@ -96,10 +96,6 @@ impl Module { let memory_buffer = unsafe { LLVMWriteBitcodeToMemoryBuffer(self.get()) };
MemoryBuffer(memory_buffer)
}
-
- fn write_to_stderr(&self) {
- unsafe { LLVMDumpModule(self.get()) };
- }
}
impl Drop for Module {
@@ -183,7 +179,6 @@ pub(super) fn run<'input>( Directive2::Method(method) => emit_ctx.emit_method(method)?,
}
}
- module.write_to_stderr();
if let Err(err) = module.verify() {
panic!("{:?}", err);
}
@@ -246,6 +241,9 @@ impl<'a, 'input> ModuleEmitContext<'a, 'input> { .map(|v| get_input_argument_type(self.context, &v.v_type, v.state_space)),
)?;
fn_ = unsafe { LLVMAddFunction(self.module, name.as_ptr(), fn_type) };
+ self.emit_fn_attribute(fn_, "amdgpu-unsafe-fp-atomics", "true");
+ self.emit_fn_attribute(fn_, "uniform-work-group-size", "true");
+ self.emit_fn_attribute(fn_, "no-trapping-math", "true");
}
if let ast::MethodName::Func(name) = func_decl.name {
self.resolver.register(name, fn_);
@@ -404,6 +402,19 @@ impl<'a, 'input> ModuleEmitContext<'a, 'input> { ptx_parser::ScalarType::BF16x2 => todo!(),
})
}
+
+ fn emit_fn_attribute(&self, llvm_object: LLVMValueRef, key: &str, value: &str) {
+ let attribute = unsafe {
+ LLVMCreateStringAttribute(
+ self.context,
+ key.as_ptr() as _,
+ key.len() as u32,
+ value.as_ptr() as _,
+ value.len() as u32,
+ )
+ };
+ unsafe { LLVMAddAttributeAtIndex(llvm_object, LLVMAttributeFunctionIndex, attribute) };
+ }
}
fn get_input_argument_type(
@@ -529,7 +540,7 @@ impl<'a> MethodEmitContext<'a> { ast::Instruction::Shl { data, arguments } => self.emit_shl(data, arguments),
ast::Instruction::Ret { data } => Ok(self.emit_ret(data)),
ast::Instruction::Cvta { data, arguments } => self.emit_cvta(data, arguments),
- ast::Instruction::Abs { .. } => todo!(),
+ ast::Instruction::Abs { data, arguments } => self.emit_abs(data, arguments),
ast::Instruction::Mad { data, arguments } => self.emit_mad(data, arguments),
ast::Instruction::Fma { data, arguments } => self.emit_fma(data, arguments),
ast::Instruction::Sub { data, arguments } => self.emit_sub(data, arguments),
@@ -539,7 +550,6 @@ impl<'a> MethodEmitContext<'a> { ast::Instruction::Sqrt { data, arguments } => self.emit_sqrt(data, arguments),
ast::Instruction::Rsqrt { data, arguments } => self.emit_rsqrt(data, arguments),
ast::Instruction::Selp { data, arguments } => self.emit_selp(data, arguments),
- ast::Instruction::Bar { .. } => todo!(),
ast::Instruction::Atom { data, arguments } => self.emit_atom(data, arguments),
ast::Instruction::AtomCas { data, arguments } => self.emit_atom_cas(data, arguments),
ast::Instruction::Div { data, arguments } => self.emit_div(data, arguments),
@@ -559,6 +569,7 @@ impl<'a> MethodEmitContext<'a> { ast::Instruction::Trap {} => todo!(),
// replaced by a function call
ast::Instruction::Bfe { .. }
+ | ast::Instruction::Bar { .. }
| ast::Instruction::Bfi { .. }
| ast::Instruction::Activemask { .. } => return Err(error_unreachable()),
}
@@ -1570,8 +1581,12 @@ impl<'a> MethodEmitContext<'a> { Some(LLVMBuildFPToUI),
)
}
- ptx_parser::CvtMode::FPFromSigned(_) => todo!(),
- ptx_parser::CvtMode::FPFromUnsigned(_) => todo!(),
+ ptx_parser::CvtMode::FPFromSigned(_) => {
+ return self.emit_cvt_int_to_float(data.to, arguments, LLVMBuildSIToFP)
+ }
+ ptx_parser::CvtMode::FPFromUnsigned(_) => {
+ return self.emit_cvt_int_to_float(data.to, arguments, LLVMBuildUIToFP)
+ }
};
let src = self.resolver.value(arguments.src)?;
self.resolver.with_result(arguments.dst, |dst| unsafe {
@@ -1726,6 +1741,25 @@ impl<'a> MethodEmitContext<'a> { Ok(())
}
+ fn emit_cvt_int_to_float(
+ &mut self,
+ to: ptx_parser::ScalarType,
+ arguments: ptx_parser::CvtArgs<SpirvWord>,
+ llvm_func: unsafe extern "C" fn(
+ arg1: LLVMBuilderRef,
+ Val: LLVMValueRef,
+ DestTy: LLVMTypeRef,
+ Name: *const i8,
+ ) -> LLVMValueRef,
+ ) -> Result<(), TranslateError> {
+ let type_ = get_scalar_type(self.context, to);
+ let src = self.resolver.value(arguments.src)?;
+ self.resolver.with_result(arguments.dst, |dst| unsafe {
+ llvm_func(self.builder, src, type_, dst)
+ });
+ Ok(())
+ }
+
fn emit_rsqrt(
&mut self,
data: ptx_parser::TypeFtz,
@@ -1994,7 +2028,7 @@ impl<'a> MethodEmitContext<'a> { ptx_parser::MinMaxDetails::Float(ptx_parser::MinMaxFloat { nan: true, .. }) => {
return Err(error_todo())
}
- ptx_parser::MinMaxDetails::Float(ptx_parser::MinMaxFloat { .. }) => "llvm.maxnum",
+ ptx_parser::MinMaxDetails::Float(ptx_parser::MinMaxFloat { .. }) => "llvm.minnum",
};
let intrinsic = format!("{}.{}\0", llvm_prefix, LLVMTypeDisplay(data.type_()));
let llvm_type = get_scalar_type(self.context, data.type_());
@@ -2021,7 +2055,7 @@ impl<'a> MethodEmitContext<'a> { ptx_parser::MinMaxDetails::Float(ptx_parser::MinMaxFloat { nan: true, .. }) => {
return Err(error_todo())
}
- ptx_parser::MinMaxDetails::Float(ptx_parser::MinMaxFloat { .. }) => "llvm.minnum",
+ ptx_parser::MinMaxDetails::Float(ptx_parser::MinMaxFloat { .. }) => "llvm.maxnum",
};
let intrinsic = format!("{}.{}\0", llvm_prefix, LLVMTypeDisplay(data.type_()));
let llvm_type = get_scalar_type(self.context, data.type_());
@@ -2149,6 +2183,30 @@ impl<'a> MethodEmitContext<'a> { Ok(())
}
+ fn emit_abs(
+ &mut self,
+ data: ast::TypeFtz,
+ arguments: ptx_parser::AbsArgs<SpirvWord>,
+ ) -> Result<(), TranslateError> {
+ let llvm_type = get_scalar_type(self.context, data.type_);
+ let src = self.resolver.value(arguments.src)?;
+ let (prefix, intrinsic_arguments) = if data.type_.kind() == ast::ScalarKind::Float {
+ ("llvm.fabs", vec![(src, llvm_type)])
+ } else {
+ let pred = get_scalar_type(self.context, ast::ScalarType::Pred);
+ let zero = unsafe { LLVMConstInt(pred, 0, 0) };
+ ("llvm.abs", vec![(src, llvm_type), (zero, pred)])
+ };
+ let llvm_intrinsic = format!("{}.{}\0", prefix, LLVMTypeDisplay(data.type_));
+ self.emit_intrinsic(
+ unsafe { CStr::from_bytes_with_nul_unchecked(llvm_intrinsic.as_bytes()) },
+ Some(arguments.dst),
+ &data.type_.into(),
+ intrinsic_arguments,
+ )?;
+ Ok(())
+ }
+
/*
// Currently unused, LLVM 18 (ROCm 6.2) does not support `llvm.set.rounding`
// Should be available in LLVM 19
|