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gpgscm: Reduce opcode dispatch overhead.

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* tests/gpgscm/scheme.c (s_thread_to): New macro.
(CASE): Likewise.
(opexe_[0-6]): Use 'CASE' instead of 'case' statements, replace
's_goto' with 's_thread_to' where applicable.
--

This is a straight-forward optimization that replaces 's_goto' in
certain cases.  Instead of returning to the calling function, and
dispatching the next opcode, we can jump to the opcode handler.

Signed-off-by: Justus Winter <justus@g10code.com>
This commit is contained in:
Justus Winter 2016-11-10 11:47:08 +01:00
parent 568cfcde45
commit d3a98ff5bc
2 changed files with 256 additions and 228 deletions
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479
tests/gpgscm/scheme.c
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tests/gpgscm/scheme.h
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@ -90,6 +90,11 @@ extern "C" {
# define USE_COMPILE_HOOK 1 # define USE_COMPILE_HOOK 1
#endif #endif
/* Enable faster opcode dispatch. */
#ifndef USE_THREADED_CODE
# define USE_THREADED_CODE 1
#endif
#ifndef USE_STRCASECMP /* stricmp for Unix */ #ifndef USE_STRCASECMP /* stricmp for Unix */
# define USE_STRCASECMP 0 # define USE_STRCASECMP 0
#endif #endif