import gdb-1999-08-09 snapshot

1 files changed, 52 insertions, 80 deletions

diff --git a/sim/common/cgen-engine.h b/sim/common/cgen-engine.h
index e7d27e03588..fbcf3e5fc1a 100644
--- a/sim/common/cgen-engine.h
+++ b/sim/common/cgen-engine.h
@@ -180,11 +180,6 @@ do { \
        & CGEN_ATTR_MASK (CGEN_INSN_SKIP_CTI)) \
       != 0)
 
-/* These are used so that we can compile two copies of the semantic code,
-   one with full feature support and one without that runs fast(er).  */
-#define SEM_FN_NAME(cpu,fn) XCONCAT3 (cpu,_sem_,fn)
-#define SEMF_FN_NAME(cpu,fn) XCONCAT3 (cpu,_semf_,fn)
-
 /* Return pointer to ARGBUF given ptr to SCACHE.  */
 #define SEM_ARGBUF(sem_arg) (& (sem_arg) -> argbuf)
 
@@ -217,22 +212,11 @@ do { \
 #define PBB_UPDATE_INSN_COUNT(cpu,sc) \
   (CPU_INSN_COUNT (cpu) += SEM_ARGBUF (sc) -> fields.chain.insn_count)
 
-/* Value for br_addr_ptr indicating branch wasn't taken.  */
-#define SEM_BRANCH_UNTAKEN ((SEM_PC *) 0)
-
-/* Value for br_addr_ptr indicating branch was taken to uncacheable
-   address (e.g. j reg).  */
-#define SEM_BRANCH_UNCACHEABLE ((SEM_PC *) 1)
-
-/* Initialize next-pbb link for SEM_BRANCH_VIA_CACHE.  */
-#define SEM_BRANCH_INIT_EXTRACT(abuf) \
-do { (abuf)->fields.cti.addr_cache = 0; } while (0)
-
 /* Do not append a `;' to invocations of this.
-   npc,npc_ptr are for communication between the cti insn and cti-chain.  */
+   npc,br_type are for communication between the cti insn and cti-chain.  */
 #define SEM_BRANCH_INIT \
   IADDR npc = 0; /* assign a value for -Wall */ \
-  SEM_PC *npc_ptr = SEM_BRANCH_UNTAKEN;
+  SEM_BRANCH_TYPE br_type = SEM_BRANCH_UNTAKEN;
 
 /* SEM_IN_SWITCH is defined at the top of the mainloop.c files
    generated by genmloop.sh.  It exists so generated semantic code needn't
@@ -241,30 +225,36 @@ do { (abuf)->fields.cti.addr_cache = 0; } while (0)
 #define SEM_BRANCH_FINI(pcvar) \
 do { \
   pbb_br_npc = npc; \
-  pbb_br_npc_ptr = npc_ptr; \
+  pbb_br_type = br_type; \
 } while (0)
 #else /* 1 semantic function per instruction */
 #define SEM_BRANCH_FINI(pcvar) \
 do { \
   CPU_PBB_BR_NPC (current_cpu) = npc; \
-  CPU_PBB_BR_NPC_PTR (current_cpu) = npc_ptr; \
+  CPU_PBB_BR_TYPE (current_cpu) = br_type; \
 } while (0)
 #endif
 
-/* Return address of cached branch address value.  */
-#define SEM_BRANCH_ADDR_CACHE(sem_arg) \
-  (& SEM_ARGBUF (sem_arg)->fields.cti.addr_cache)
-
-#define SEM_BRANCH_VIA_CACHE(cpu, sc, newval, pcvar, cachevarptr) \
+#define SEM_BRANCH_VIA_CACHE(cpu, sc, newval, pcvar) \
 do { \
   npc = (newval); \
-  npc_ptr = (cachevarptr); \
+  br_type = SEM_BRANCH_CACHEABLE; \
 } while (0)
 
 #define SEM_BRANCH_VIA_ADDR(cpu, sc, newval, pcvar) \
 do { \
   npc = (newval); \
-  npc_ptr = SEM_BRANCH_UNCACHEABLE; \
+  br_type = SEM_BRANCH_UNCACHEABLE; \
+} while (0)
+
+#define SEM_SKIP_COMPILE(cpu, sc, skip) \
+do { \
+  SEM_ARGBUF (sc) -> skip_count = (skip); \
+} while (0)
+
+#define SEM_SKIP_INSN(cpu, sc, vpcvar) \
+do { \
+  (vpcvar) += SEM_ARGBUF (sc) -> skip_count; \
 } while (0)
 
 #else /* ! WITH_SCACHE_PBB */
@@ -273,8 +263,6 @@ do { \
 
 #define SEM_NEXT_VPC(sem_arg, pc, len) ((pc) + (len))
 
-#define SEM_BRANCH_INIT_EXTRACT(abuf) do { } while (0)
-
 /* ??? May wish to move taken_p out of here and make it explicit.  */
 #define SEM_BRANCH_INIT \
   int taken_p = 0;
@@ -285,9 +273,7 @@ do { \
 #define SEM_BRANCH_FINI(pcvar) \
   do { TARGET_SEM_BRANCH_FINI (pcvar, taken_p); } while (0)
 
-#define SEM_BRANCH_ADDR_CACHE(sem_arg) shouldnt_be_used
-
-#define SEM_BRANCH_VIA_CACHE(cpu, sc, newval, pcvar, cachevar) \
+#define SEM_BRANCH_VIA_CACHE(cpu, sc, newval, pcvar) \
 do { \
   (pcvar) = (newval); \
   taken_p = 1; \
@@ -314,9 +300,7 @@ do { \
 #define SEM_BRANCH_INIT \
   int taken_p = 0;
 
-#define SEM_BRANCH_ADDR_CACHE(sem_arg) shouldnt_be_used
-
-#define SEM_BRANCH_VIA_CACHE(cpu, abuf, newval, pcvar, cachevar) \
+#define SEM_BRANCH_VIA_CACHE(cpu, abuf, newval, pcvar) \
 do { \
   (pcvar) = (newval); \
   taken_p = 1; \
@@ -344,10 +328,12 @@ do { \
 
 /* Instruction information.  */
 
-/* Compile time computable instruction data.
+/* Sanity check, at most one of these may be true.  */
+#if WITH_PARALLEL_READ && WITH_PARALLEL_WRITE
+#error "Both WITH_PARALLEL_READ && WITH_PARALLEL_WRITE can't be true."
+#endif
 
-   ??? May wish to move parallel execution support into its own struct.
-   It's a fair bit of "clutter" for the "normal" case.  */
+/* Compile time computable instruction data.  */
 
 struct insn_sem {
   /* The instruction type (a number that identifies each insn over the
@@ -357,10 +343,8 @@ struct insn_sem {
   /* Index in IDESC table.  */
   int index;
 
-  /* Sanity check, at most one of these may be true.  */
-#if WITH_PARALLEL_READ && WITH_PARALLEL_WRITE
-#error "Both WITH_PARALLEL_READ && WITH_PARALLEL_WRITE can't be true."
-#endif
+  /* Semantic format number.  */
+  int sfmt;
 
 #if WITH_PARALLEL_READ || WITH_PARALLEL_WRITE
   /* Index in IDESC table of parallel handler.  */
@@ -368,50 +352,38 @@ struct insn_sem {
 #endif
 
 #if WITH_PARALLEL_READ
-#ifndef __GNUC__
-  /* Semantic format number of pre-read handler.
-     Only used by chips that support parallel execution of several insns.
-     It is always implemented as a `switch'.  In the case of GNUC we use
-     computed gotos.  When not GNUC, this is the argument to `switch'.  */
-  int fmt;
-#endif
+  /* Index in IDESC table of read handler.  */
+  int read_index;
 #endif
 
 #if WITH_PARALLEL_WRITE
-  /* Index in IDESC table of writeback handler.
-     Only used by chips that support parallel execution of several insns.  */
+  /* Index in IDESC table of writeback handler.  */
   int write_index;
 #endif
+};
 
-  /* Routines to execute the insn.
-     The full version has all features (profiling,tracing) compiled in.
-     The fast version has none of that.  */
-#if ! WITH_SEM_SWITCH_FULL
-  SEMANTIC_FN *sem_full;
-#endif
-#if WITH_FAST && ! WITH_SEM_SWITCH_FAST
-  SEMANTIC_FN *sem_fast;
-#endif
+/* Entry in semantic function table.
+   This information is copied to the insn descriptor table at run-time.  */
+
+struct sem_fn_desc {
+  /* Index in IDESC table.  */
+  int index;
+
+  /* Function to perform the semantics of the insn.  */
+  SEMANTIC_FN *fn;
 };
 
 /* Run-time computed instruction descriptor.  */
 
 struct idesc {
-  /* Parallel read-before-exec support.  */
-#if WITH_PARALLEL_READ
-  struct idesc *par_idesc;
+#if WITH_SEM_SWITCH_FAST
 #ifdef __GNUC__
-  void *read;
+  void *sem_fast_lab;
 #else
-  int fmt;
-#endif
+  /* nothing needed, switch's on `num' member */
 #endif
-
-  /* Parallel write-after-exec support.  */
-#if WITH_PARALLEL_WRITE
-  /* Pointer to parallel handler if serial insn.
-     Pointer to writeback handler if parallel insn.  */
-  struct idesc *par_idesc;
+#else
+  SEMANTIC_FN *sem_fast;
 #endif
 
 #if WITH_SEM_SWITCH_FULL
@@ -424,20 +396,20 @@ struct idesc {
   SEMANTIC_FN *sem_full;
 #endif
 
-#if WITH_SEM_SWITCH_FAST
-#ifdef __GNUC__
-  void *sem_fast_lab;
-#else
-  /* nothing needed, switch's on `num' member */
-#endif
-#else
-  SEMANTIC_FN *sem_fast;
+  /* Parallel support.  */
+#if WITH_PARALLEL_READ || WITH_PARALLEL_WRITE
+  /* Pointer to parallel handler if serial insn.
+     Pointer to readahead/writeback handler if parallel insn.  */
+  struct idesc *par_idesc;
 #endif
 
   /* Instruction number (index in IDESC table, profile table).
      Also used to switch on in non-gcc semantic switches.  */
   int num;
 
+  /* Semantic format id.  */
+  int sfmt;
+
   /* instruction data (name, attributes, size, etc.) */
   const CGEN_INSN *idata;