1. Pass _Float16 and _Complex _Float16 values on stack.
2. Return _Float16 and _Complex _Float16 values in %xmm0/%xmm1 registers.
---
low-level-sys-info.tex | 57 +++++++++++++++++++++++++++++-------------
1 file changed, 40 insertions(+), 17 deletions(-)
diff --git a/low-level-sys-info.tex b/low-level-sys-info.tex
index acaf30e..82956e3 100644
--- a/low-level-sys-info.tex
+++ b/low-level-sys-info.tex
@@ -30,7 +30,8 @@ object, and the term \emph{\textindex{\sixteenbyte{}}} refers
to a
\subsubsection{Fundamental Types}
Table~\ref{basic-types} shows the correspondence between ISO C
-scalar types and the processor scalar types. \code{__float80},
+scalar types and the processor scalar types. \code{_Float16},
+\code{__float80},
\code{__float128}, \code{__m64}, \code{__m128}, \code{__m256} and
\code{__m512} types are optional.
@@ -79,22 +80,25 @@ scalar types and the processor scalar types.
\code{__float80},
& \texttt{\textit{any-type} *} & 4 & 4 & unsigned \fourbyte \\
& \texttt{\textit{any-type} (*)()} & & \\
\hline
- Floating-& \texttt{float} & 4 & 4 & single (IEEE-754) \\
\cline{2-5}
- point & \texttt{double} & 8 & 4 & double (IEEE-754) \\
- & \texttt{long double}$^{\dagger\dagger\dagger\dagger}$ & & & \\
+ & \texttt{_Float16}$^{\dagger\dagger\dagger\dagger\dagger\dagger}$ & 2 & 2
& 16-bit (IEEE-754) \\
\cline{2-5}
- & \texttt{__float80}$^{\dagger\dagger}$ & 12 & 4 & 80-bit extended
(IEEE-754) \\
- & \texttt{long double}$^{\dagger\dagger\dagger\dagger}$ & & & \\
+ & \texttt{float} & 4 & 4 & single (IEEE-754) \\
+ \cline{2-5}
+ Floating- & \texttt{double} & 8
+ & 8$^{\dagger\dagger\dagger\dagger}$ & double (IEEE-754) \\
+ \cline{2-5}
+ point & \texttt{__float80}$^{\dagger\dagger}$ & 16 & 16 & 80-bit extended
(IEEE-754) \\
+ & \texttt{long double}$^{\dagger\dagger\dagger\dagger\dagger}$ & 16 & 16
& 80-bit extended (IEEE-754) \\
\cline{2-5}
& \texttt{__float128}$^{\dagger\dagger}$ & 16 & 16 & 128-bit extended
(IEEE-754) \\
\hline
- Complex& \texttt{_Complex float} & 8 & 4 & complex single (IEEE-754) \\
+ & \texttt{_Complex float} & 8 & 4 & complex single (IEEE-754) \\
\cline{2-5}
- Floating-& \texttt{_Complex double} & 16 & 4 & complex double (IEEE-754) \\
- point & \texttt{_Complex long double}$^{\dagger\dagger\dagger\dagger}$ & &
& \\
+ Complex& \texttt{_Complex double} & 16 & 4 & complex double (IEEE-754) \\
+ Floating-& \texttt{_Complex long double}$^{\dagger\dagger\dagger\dagger}$
& & & \\
\cline{2-5}
- & \texttt{_Complex __float80}$^{\dagger\dagger}$ & 24 & 4 & complex
80-bit extended (IEEE-754) \\
+ point & \texttt{_Complex __float80}$^{\dagger\dagger}$ & 24 & 4 & complex
80-bit extended (IEEE-754) \\
& \texttt{_Complex long double}$^{\dagger\dagger\dagger\dagger}$ & & & \\
\cline{2-5}
& \texttt{_Complex __float128}$^{\dagger\dagger}$ & 32 & 16 & complex
128-bit extended (IEEE-754) \\
@@ -125,6 +129,8 @@ The \texttt{long double} type is 64-bit, the same as the
\texttt{double}
type, on the Android{\texttrademark} platform. More information on the
Android{\texttrademark} platform is available from
\url{http://www.android.com/}.}\\
+\multicolumn{5}{p{13cm}}{\myfontsize
$^{\dagger\dagger\dagger\dagger\dagger\dagger}$
+The \texttt{_Float16} type, from ISO/IEC TS 18661-3:2015, is optional.}\\
\end{tabular}
}
\end{table}
@@ -323,6 +329,7 @@ at the time of the call.
\begin{table}
\Hrule
\caption{Register Usage}
+ \myfontsize
\label{fig-reg-usage}
\begin{center}
\begin{tabular}{l|p{8.35cm}|l}
@@ -346,13 +353,29 @@ of some 64bit return types & No \\
\EBP & callee-saved register; optionally used as frame pointer & Yes \\
\ESI & callee-saved register & yes \\
\EDI & callee-saved register & yes \\
-\reg{xmm0}, \reg{ymm0} & scratch registers; also used to pass and return
-\code{__m128}, \code{__m256} parameters & No\\
-\reg{xmm1}--\reg{xmm2},& scratch registers; also used to pass
-\code{__m128}, & No \\
-\reg{ymm1}--\reg{ymm2} & \code{__m256} parameters & \\
-\reg{xmm3}--\reg{xmm7},& scratch registers & No \\
-\reg{ymm3}--\reg{ymm7} & & \\
+\reg{xmm0} & scratch register; also used to pass the first \code{__m128}
+ parameter and return \code{__m128}, \code{_Float16},
+ the real part of \code{_Complex _Float16} & No \\
+\reg{ymm0} & scratch register; also used to pass the first \code{__m256}
+ parameter and return \code{__m256} & No \\
+\reg{zmm0} & scratch register; also used to pass the first \code{__m512}
+ parameter and return \code{__m512} & No \\
+\reg{xmm1} & scratch register; also used to pass the second \code{__m128}
+ parameter and return the imaginary part of
+ \code{_Complex _Float16} & No \\
+\reg{ymm1} & scratch register; also used to pass the second \code{__m256}
+ parameters & No \\
+\reg{zmm1} & scratch register; also used to pass the second \code{__m512}
+ parameters & No \\
+\reg{xmm2} & scratch register; also used to pass the third \code{__m128}
+ parameters & No \\
+\reg{ymm2} & scratch register; also used to pass the third \code{__m256}
+ parameters & No \\
+\reg{zmm2} & scratch register; also used to pass the third \code{__m512}
+ parameters & No \\
+\reg{xmm3}--\reg{xmm7} & scratch registers & No \\
+\reg{ymm3}--\reg{ymm7} & scratch registers & No \\
+\reg{zmm3}--\reg{zmm7} & scratch registers & No \\
\reg{mm0} & scratch register; also used to pass and return
\code{__m64} parameter & No\\
\reg{mm1}--\reg{mm2} & used to pass \code{__m64} parameters & No\\
--
2.31.1
