T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Implement fma/fabs/fneg/fcopysign on the interpreter (#4367)

Browse Source 
* cranelift: Implement `fma` on interpreter

* cranelift: Implement `fabs` on interpreter

* cranelift: Fix `fneg` implementation on interpreter

`fneg` was implemented as `0 - x` which is not correct according to the
standard since that operation makes no guarantees on what the output
is when the input is `NaN`. However for `fneg` the output for `NaN`
inputs is fully defined.

* cranelift: Implement `fcopysign` on interpreter
This commit is contained in:
Afonso Bordado
2022-07-05 17:03:04 +01:00
committed by GitHub
parent 5542c4ef26
commit 2003ae99a0
7 changed files with 511 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
cranelift/interpreter/src/step.rs
View File

@@ -679,10 +679,10 @@ where
Opcode::Fmul => binary(Value::mul, arg(0)?, arg(1)?)?,
Opcode::Fdiv => binary(Value::div, arg(0)?, arg(1)?)?,
Opcode::Sqrt => assign(Value::sqrt(arg(0)?)?),
Opcode::Fma => unimplemented!("Fma"),
Opcode::Fneg => binary(Value::sub, Value::float(0, ctrl_ty)?, arg(0)?)?,
Opcode::Fabs => unimplemented!("Fabs"),
Opcode::Fcopysign => unimplemented!("Fcopysign"),
Opcode::Fma => assign(Value::fma(arg(0)?, arg(1)?, arg(2)?)?),
Opcode::Fneg => assign(Value::neg(arg(0)?)?),
Opcode::Fabs => assign(Value::abs(arg(0)?)?),
Opcode::Fcopysign => binary(Value::copysign, arg(0)?, arg(1)?)?,
Opcode::Fmin => choose(
Value::is_nan(&arg(0)?)? || Value::lt(&arg(0)?, &arg(1)?)?,
arg(0)?,