Mercurial > pub > dyncall > dyncall
comparison doc/manual/callconvs/callconv_sparc.tex @ 194:41d6945f5858
- sparc doc improvements (esp. for sparc64)
| author | Tassilo Philipp |
|---|---|
| date | Sat, 18 Mar 2017 19:08:45 +0100 |
| parents | 600bd90afdb7 |
| children | 53c42b1d9f8b |
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| 193:600bd90afdb7 | 194:41d6945f5858 |
|---|---|
| 32 \subsubsection{SPARC (32-bit) Calling Convention} | 32 \subsubsection{SPARC (32-bit) Calling Convention} |
| 33 | 33 |
| 34 \paragraph{Register usage} | 34 \paragraph{Register usage} |
| 35 | 35 |
| 36 \begin{itemize} | 36 \begin{itemize} |
| 37 \item 32 32-bit integer/pointer registers | 37 \item 32 single floating point registers (f0-f31, usable as 8 quad precision q0,q4,q8,...,q28, 16 double precision d0,d2,d4,...,d30) |
| 38 \item 32 floating point registers (usable as 8 quad precision, 16 double precision or 32 single precision registers) | 38 \item 32 32-bit integer/pointer registers out of a bigger (vendor/model dependent) number that are accessible at a time (8 are global ones (g*), whereas the remaining 24 form a register window with 8 input (i*), 8 output (o*) and 8 local (l*) ones) |
| 39 \item 32 registers are accessible at a time (8 are global ones (g*), whereas the rest forms a register window with 8 input (i*), 8 output (o*) and 8 local (l*) ones) | |
| 40 \item calling a function shifts the register window, the old output registers become the new input registers (old local and input ones are not accessible anymore) | 39 \item calling a function shifts the register window, the old output registers become the new input registers (old local and input ones are not accessible anymore) |
| 41 \end{itemize} | 40 \end{itemize} |
| 42 | 41 |
| 43 \begin{table}[h] | 42 \begin{table}[h] |
| 44 \begin{tabular*}{0.95\textwidth}{lll} | 43 \begin{tabular*}{0.95\textwidth}{lll} |
| 45 Name & Alias & Brief description\\ | 44 Name & Alias & Brief description\\ |
| 46 \hline | 45 \hline |
| 47 {\bf \%g0} & & Read-only, hardwired to 0 \\ | 46 {\bf \%g0} & \%r0 & Read-only, hardwired to 0 \\ |
| 48 {\bf \%g1-\%g7} & & Global \\ | 47 {\bf \%g1-\%g7} & \%r1-\%r7 & Global \\ |
| 49 {\bf \%o0 and \%i0} & & Output and input argument 0, return value \\ | 48 {\bf \%o0,\%o1 and \%i0,\%i1} & \%r8,\%r9 and \%r24,\%r25 & Output and input argument registers, return value \\ |
| 50 {\bf \%o1-\%o5 and \%i1-\%i5} & & Output and input argument registers \\ | 49 {\bf \%o2-\%o5 and \%i2-\%i5} & \%r10-\%r13 and \%r26-\%r29 & Output and input argument registers \\ |
| 51 {\bf \%o6 and \%i6} & & Stack and frame pointer \\ | 50 {\bf \%o6 and \%i6} & \%r14 and \%r30, \%sp and \%fp & Stack and frame pointer \\ |
| 52 {\bf \%o7 and \%i7} & & Return address (caller writes to o7, callee uses i7) \\ | 51 {\bf \%o7 and \%i7} & \%r15 and \%r31 & Return address (caller writes to o7, callee uses i7) \\ |
| 52 {\bf \%l0-\%l7} & \%r16-\%r23 & preserve \\ | |
| 53 {\bf \%f0,\%f1} & & Floating point return value \\ | |
| 54 {\bf \%f2-\%f31} & & scratch \\ | |
| 53 \end{tabular*} | 55 \end{tabular*} |
| 54 \caption{Register usage on sparc calling convention} | 56 \caption{Register usage on sparc calling convention} |
| 55 \end{table} | 57 \end{table} |
| 56 | 58 |
| 57 \paragraph{Parameter passing} | 59 \paragraph{Parameter passing} |
| 100 \hhline{~-~~} | 102 \hhline{~-~~} |
| 101 \end{tabular} | 103 \end{tabular} |
| 102 \\ | 104 \\ |
| 103 \\ | 105 \\ |
| 104 \\ | 106 \\ |
| 105 \caption{Stack layout on sparc calling convention} | 107 \caption{Stack layout on sparc32 calling convention} |
| 106 \end{figure} | 108 \end{figure} |
| 107 | 109 |