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| author | Xavier Leroy <xavierleroy@users.noreply.github.com> | 2015-04-22 14:27:12 +0200 |
|---|---|---|
| committer | Xavier Leroy <xavierleroy@users.noreply.github.com> | 2015-04-22 14:27:12 +0200 |
| commit | 0bf99217426a44046ef0aaa7f84a9b2a3646ed89 (patch) | |
| tree | e4f983980a5001792b90ed8f3dbd8fa241e43eb1 /arm | |
| parent | 08b2b46f15e70b11c044e4e9a7c8438a96d57ed7 (diff) | |
| parent | ca4aa822693f4d98de99fd3f13c1523d733e1cb0 (diff) | |
| download | compcert-0bf99217426a44046ef0aaa7f84a9b2a3646ed89.tar.gz compcert-0bf99217426a44046ef0aaa7f84a9b2a3646ed89.zip | |
Merge pull request #40 from AbsInt/inline-asm
GCC-style extended inline asm.
The subset implemented is:
- zero or one output
- output constraints "=r" (to register) or "=m" (to memory)
- zero, one or several inputs
- input constraints "r" (in register), "m" (in memory), "i" and "n" (compile-time integer constant)
- clobbered registers (the 3rd argument)
- both anonymous (%3) and named (%[name]) operands
- modifiers %R and %Q to refer to the most significant / least significant part of a register pair holding a 64-bit integer. (Undocumented GCC ARM feature.)
All asm statements are treated as "volatile", possibly modifying memory and condition codes.
Diffstat (limited to 'arm')
| -rw-r--r-- | arm/CBuiltins.ml | 4 | ||||
| -rw-r--r-- | arm/TargetPrinter.ml | 6 |
2 files changed, 7 insertions, 3 deletions
diff --git a/arm/CBuiltins.ml b/arm/CBuiltins.ml index 17aa5115..00de4df7 100644 --- a/arm/CBuiltins.ml +++ b/arm/CBuiltins.ml @@ -55,3 +55,7 @@ let builtins = { let size_va_list = 4 let va_list_scalar = true + +(* Expand memory references inside extended asm statements. Used in C2C. *) + +let asm_mem_argument arg = Printf.sprintf "[%s, #0]" arg diff --git a/arm/TargetPrinter.ml b/arm/TargetPrinter.ml index df17e595..c77572db 100644 --- a/arm/TargetPrinter.ml +++ b/arm/TargetPrinter.ml @@ -1003,9 +1003,9 @@ module Target (Opt: PRINTER_OPTIONS) : TARGET = (Int32.to_int (camlint_of_coqint al)) args | EF_annot_val(txt, targ) -> print_annot_val oc (extern_atom txt) args res - | EF_inline_asm txt -> - fprintf oc "%s begin inline assembly\n" comment; - fprintf oc " %s\n" (extern_atom txt); + | EF_inline_asm(txt, sg, clob) -> + fprintf oc "%s begin inline assembly\n\t" comment; + PrintAnnot.print_inline_asm preg oc (extern_atom txt) sg args res; fprintf oc "%s end inline assembly\n" comment; 5 (* hoping this is an upper bound... *) | _ -> |