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gen-dev: complete Num{Mul,Add,Sub}Saturated impls

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MulSaturated and AddSaturated are now implemented for u128, i128
SubSaturated is now implemented for Dec even if it's a little strange to
saturate at a decimal value:

```
» Num.subSaturated -170_141_183_460_469_231_731dec 1

-170141183460469231731.687303715884105728 : Dec
```

I decided to rm the `build_num_{mul,add}_saturated` methods because
they don't require any asm-specifics. They either call out to bitcode, or
use the non-saturated version for floats.
This commit is contained in:
shua 2024-11-28 23:20:48 +01:00
parent 49ab969ff3
commit 8fd2fbc3a1
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4 changed files with 231 additions and 192 deletions
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61
crates/compiler/gen_dev/src/lib.rs
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@ -1005,7 +1005,7 @@ trait Backend<'a> {
}
}
/// build_run_low_level builds the low level opertation and outputs to the specified symbol.
/// build_run_low_level builds the low level operation and outputs to the specified symbol.
/// The builder must keep track of the symbol because it may be referred to later.
fn build_run_low_level(
&mut self,
@ -1068,9 +1068,6 @@ trait Backend<'a> {
LowLevel::NumAddChecked => {
self.build_num_add_checked(sym, &args[0], &args[1], &arg_layouts[0], ret_layout)
}
LowLevel::NumSubChecked => {
self.build_num_sub_checked(sym, &args[0], &args[1], &arg_layouts[0], ret_layout)
}
LowLevel::NumAcos => self.build_fn_call(
sym,
bitcode::NUM_ACOS[FloatWidth::F64].to_string(),
@ -1239,27 +1236,12 @@ trait Backend<'a> {
);
self.build_num_sub_wrap(sym, &args[0], &args[1], ret_layout)
}
LowLevel::NumSubSaturated => match self.interner().get_repr(*ret_layout) {
LayoutRepr::Builtin(Builtin::Int(int_width)) => self.build_fn_call(
sym,
bitcode::NUM_SUB_SATURATED_INT[int_width].to_string(),
args,
arg_layouts,
ret_layout,
),
LayoutRepr::Builtin(Builtin::Float(FloatWidth::F32)) => {
self.build_num_sub(sym, &args[0], &args[1], ret_layout)
}
LayoutRepr::Builtin(Builtin::Float(FloatWidth::F64)) => {
// saturated sub is just normal sub
self.build_num_sub(sym, &args[0], &args[1], ret_layout)
}
LayoutRepr::Builtin(Builtin::Decimal) => {
// self.load_args_and_call_zig(backend, bitcode::DEC_SUB_SATURATED)
todo!()
}
_ => internal_error!("invalid return type"),
},
LowLevel::NumSubSaturated => {
self.build_num_sub_saturated(*sym, args[0], args[1], *ret_layout)
}
LowLevel::NumSubChecked => {
self.build_num_sub_checked(sym, &args[0], &args[1], &arg_layouts[0], ret_layout)
}
LowLevel::NumBitwiseAnd => {
if let LayoutRepr::Builtin(Builtin::Int(int_width)) =
self.interner().get_repr(*ret_layout)
@ -2392,16 +2374,6 @@ trait Backend<'a> {
layout: &InLayout<'a>,
);
/// build_num_sub_checked stores the sum of src1 and src2 into dst.
fn build_num_sub_checked(
&mut self,
dst: &Symbol,
src1: &Symbol,
src2: &Symbol,
num_layout: &InLayout<'a>,
return_layout: &InLayout<'a>,
);
/// build_num_mul stores `src1 * src2` into dst.
fn build_num_mul(&mut self, dst: &Symbol, src1: &Symbol, src2: &Symbol, layout: &InLayout<'a>);
@ -2460,6 +2432,25 @@ trait Backend<'a> {
layout: &InLayout<'a>,
);
/// build_num_sub_saturated stores the `src1 - src2` difference into dst.
fn build_num_sub_saturated(
&mut self,
dst: Symbol,
src1: Symbol,
src2: Symbol,
layout: InLayout<'a>,
);
/// build_num_sub_checked stores the difference of src1 and src2 into dst.
fn build_num_sub_checked(
&mut self,
dst: &Symbol,
src1: &Symbol,
src2: &Symbol,
num_layout: &InLayout<'a>,
return_layout: &InLayout<'a>,
);
/// stores the `src1 & src2` into dst.
fn build_int_bitwise_and(
&mut self,