kc3-lang/libffi/src/sparc/internal.h

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• Hash : 6eec410f
  Author :
  Date : 2014-10-26T15:29:04
  

  sparc: Re-add abi compliant structure support
  
  The original code, removed in the "rewrite" patch, was incorrect for
  large structures, and required dynamic allocation of a trampoline on
  every ffi_call.
  
  Instead, allocate a 4k entry table of all possible structure returns.
  The table is 80k, but is read-only and dynamically paged, which ought
  to be better than allocating the trampoline.
  
  This is difficult to test with gcc.  One can only use -O0 at present.
  See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63668.
  

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• src/sparc/internal.h

• #define SPARC_RET_VOID		0
  #define SPARC_RET_STRUCT	1
  #define SPARC_RET_UINT8		2
  #define SPARC_RET_SINT8		3
  #define SPARC_RET_UINT16	4
  #define SPARC_RET_SINT16	5
  #define SPARC_RET_UINT32	6
  #define SP_V9_RET_SINT32	7	/* v9 only */
  #define SP_V8_RET_CPLX16	7	/* v8 only */
  #define SPARC_RET_INT64		8
  #define SPARC_RET_INT128	9
  
  /* Note that F_7 is missing, and is handled by SPARC_RET_STRUCT.  */
  #define SPARC_RET_F_8		10
  #define SPARC_RET_F_6		11
  #define SPARC_RET_F_4		12
  #define SPARC_RET_F_2		13
  #define SP_V9_RET_F_3		14	/* v9 only */
  #define SP_V8_RET_CPLX8		14	/* v8 only */
  #define SPARC_RET_F_1		15
  
  #define SPARC_FLAG_RET_MASK	15
  #define SPARC_FLAG_RET_IN_MEM	32
  #define SPARC_FLAG_FP_ARGS	64
  
  #define SPARC_SIZEMASK_SHIFT	8
  

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