[Python-checkins] python/dist/src/Python ceval.c,2.383,2.384
arigo at users.sourceforge.net
arigo at users.sourceforge.net
Sat Mar 20 15:03:20 EST 2004
Update of /cvsroot/python/python/dist/src/Python
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv18748
Modified Files:
ceval.c
Log Message:
A 2% speed improvement with gcc on low-endian machines. My guess is that this
new pattern for NEXTARG() is detected and optimized as a single (*short)
loading.
Index: ceval.c
===================================================================
RCS file: /cvsroot/python/python/dist/src/Python/ceval.c,v
retrieving revision 2.383
retrieving revision 2.384
diff -C2 -d -r2.383 -r2.384
*** ceval.c 12 Mar 2004 16:33:17 -0000 2.383
--- ceval.c 20 Mar 2004 20:03:17 -0000 2.384
***************
*** 628,632 ****
#define INSTR_OFFSET() (next_instr - first_instr)
#define NEXTOP() (*next_instr++)
! #define NEXTARG() (next_instr += 2, (next_instr[-1]<<8) + next_instr[-2])
#define JUMPTO(x) (next_instr = first_instr + (x))
#define JUMPBY(x) (next_instr += (x))
--- 628,633 ----
#define INSTR_OFFSET() (next_instr - first_instr)
#define NEXTOP() (*next_instr++)
! #define OPARG() (next_instr[0] + (next_instr[1]<<8))
! #define OPARG_SIZE 2
#define JUMPTO(x) (next_instr = first_instr + (x))
#define JUMPBY(x) (next_instr += (x))
***************
*** 659,664 ****
#define PREDICTED(op) PRED_##op: next_instr++
! #define PREDICTED_WITH_ARG(op) PRED_##op: oparg = (next_instr[2]<<8) + \
! next_instr[1]; next_instr += 3
/* Stack manipulation macros */
--- 660,664 ----
#define PREDICTED(op) PRED_##op: next_instr++
! #define PREDICTED_WITH_ARG(op) PRED_##op: next_instr++; oparg = OPARG(); next_instr += OPARG_SIZE
/* Stack manipulation macros */
***************
*** 863,868 ****
opcode = NEXTOP();
! if (HAS_ARG(opcode))
! oparg = NEXTARG();
dispatch_opcode:
#ifdef DYNAMIC_EXECUTION_PROFILE
--- 863,871 ----
opcode = NEXTOP();
! if (HAS_ARG(opcode)) {
! oparg = OPARG();
! next_instr += OPARG_SIZE;
! }
!
dispatch_opcode:
#ifdef DYNAMIC_EXECUTION_PROFILE
***************
*** 2250,2254 ****
case EXTENDED_ARG:
opcode = NEXTOP();
! oparg = oparg<<16 | NEXTARG();
goto dispatch_opcode;
--- 2253,2258 ----
case EXTENDED_ARG:
opcode = NEXTOP();
! oparg = oparg<<16 | OPARG();
! next_instr += OPARG_SIZE;
goto dispatch_opcode;
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