Author: leo
Date: Mon Feb 20 08:15:21 2006
New Revision: 11677
Modified:
trunk/src/jit/i386/jit_emit.h
Log:
JIT/x86 - better float code
* 2 less instructions for inc N and dec N
* 1 less ins for storing float on FP stack top to Parrot register
Modified: trunk/src/jit/i386/jit_emit.h
==============================================================================
--- trunk/src/jit/i386/jit_emit.h (original)
+++ trunk/src/jit/i386/jit_emit.h Mon Feb 20 08:15:21 2006
@@ -1007,6 +1007,9 @@ opt_shift_rm(Parrot_jit_info_t *jit_info
# define jit_emit_fstore_mb_n(pc, base, offs) \
emitm_fstpl(pc, base, emit_None, 1, offs)
+# define jit_emit_fst_mb_n(pc, base, offs) \
+ emitm_fstl(pc, base, emit_None, 1, offs)
+
# else /* NUMVAL_SIZE */
# define jit_emit_fload_m_n(pc, address) \
@@ -1021,6 +1024,9 @@ opt_shift_rm(Parrot_jit_info_t *jit_info
# define jit_emit_fstore_mb_n(pc, base, offs) \
emitm_fstpt(pc, base, emit_None, 1, offs)
+# define jit_emit_fst_mb_n(pc, base, offs) \
+ emitm_fstt(pc, base, emit_None, 1, offs)
+
# endif /* NUMVAL_SIZE */
# if INTVAL_SIZE == 4
@@ -1513,8 +1519,13 @@ static unsigned char *lastpc;
}
# define jit_emit_mov_MR_n(pc, d, r) { \
- emitm_fld((pc), r); \
- jit_emit_fstore_mb_n((pc), emit_EBX, d); \
+ if (r) { \
+ emitm_fld((pc), r); \
+ jit_emit_fstore_mb_n((pc), emit_EBX, d); \
+ } \
+ else { \
+ jit_emit_fst_mb_n((pc), emit_EBX, d); \
+ } \
}
/* ST(r1) <= ST(r2) */
@@ -1636,17 +1647,13 @@ static unsigned char *lastpc;
}
# define jit_emit_inc_r_n(pc, r) { \
- emitm_fld(pc, r); \
emitm_fld1(pc); \
- emitm_faddp(pc, 1); \
- emitm_fstp(pc, (r+1)); \
+ emitm_faddp(pc, (r+1)); \
}
# define jit_emit_dec_r_n(pc, r) { \
- emitm_fld(pc, r); \
emitm_fld1(pc); \
- emitm_fsubp(pc, 1); \
- emitm_fstp(pc, (r+1)); \
+ emitm_fsubp(pc, (r+1)); \
}
/* ST(r1) *= ST(r2) */
