Method float_round

winch/codegen/src/isa/x64/masm.rs:688–707

(
        &mut self,
        mode: RoundingMode,
        env: &mut FuncEnv<Self::Ptr>,
        context: &mut CodeGenContext<Emission>,
        size: OperandSize,
        mut fallback: F,
    )

    }

    fn float_round<
        F: FnMut(&mut FuncEnv<Self::Ptr>, &mut CodeGenContext<Emission>, &mut Self) -> Result<()>,
    >(
        &mut self,
        mode: RoundingMode,
        env: &mut FuncEnv<Self::Ptr>,
        context: &mut CodeGenContext<Emission>,
        size: OperandSize,
        mut fallback: F,
    ) -> Result<()> {
        if self.flags.has_sse41() {
            let src = context.pop_to_reg(self, None)?;
            self.asm
                .xmm_rounds_rr(src.into(), writable!(src.into()), mode, size);
            context.stack.push(src.into());
            Ok(())
        } else {
            fallback(env, context, self)
        }
    }

    fn float_sqrt(&mut self, dst: WritableReg, src: Reg, size: OperandSize) -> Result<()> {
        self.asm.sqrt(src, dst, size);