tcg: Add insn_start_words to TCGContext

This will enable replacement of TARGET_INSN_START_WORDS in tcg.c.
Split out "tcg/insn-start-words.h" and use it in target/.

Reviewed-by: Anton Johansson <anjo@rev.ng>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

2 files changed, 19 insertions, 9 deletions

diff --git a/accel/tcg/perf.c b/accel/tcg/perf.c
index 65e35ea..f5a1eda 100644
--- a/accel/tcg/perf.c
+++ b/accel/tcg/perf.c
@@ -311,7 +311,8 @@ void perf_report_code(uint64_t guest_pc, TranslationBlock *tb,
                       const void *start)
 {
     struct debuginfo_query *q;
-    size_t insn;
+    size_t insn, start_words;
+    uint64_t *gen_insn_data;
 
     if (!perfmap && !jitdump) {
         return;
@@ -325,9 +326,12 @@ void perf_report_code(uint64_t guest_pc, TranslationBlock *tb,
     debuginfo_lock();
 
     /* Query debuginfo for each guest instruction. */
+    gen_insn_data = tcg_ctx->gen_insn_data;
+    start_words = tcg_ctx->insn_start_words;
+
     for (insn = 0; insn < tb->icount; insn++) {
         /* FIXME: This replicates the restore_state_to_opc() logic. */
-        q[insn].address = tcg_ctx->gen_insn_data[insn][0];
+        q[insn].address = gen_insn_data[insn * start_words + 0];
         if (tb_cflags(tb) & CF_PCREL) {
             q[insn].address |= (guest_pc & TARGET_PAGE_MASK);
         } else {
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 5cea9ac..67b838e 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -64,6 +64,7 @@
 #include "tb-context.h"
 #include "internal.h"
 #include "perf.h"
+#include "tcg/insn-start-words.h"
 
 TBContext tb_ctx;
 
@@ -127,22 +128,26 @@ static int64_t decode_sleb128(const uint8_t **pp)
 static int encode_search(TranslationBlock *tb, uint8_t *block)
 {
     uint8_t *highwater = tcg_ctx->code_gen_highwater;
+    uint64_t *insn_data = tcg_ctx->gen_insn_data;
+    uint16_t *insn_end_off = tcg_ctx->gen_insn_end_off;
     uint8_t *p = block;
     int i, j, n;
 
     for (i = 0, n = tb->icount; i < n; ++i) {
-        uint64_t prev;
+        uint64_t prev, curr;
 
         for (j = 0; j < TARGET_INSN_START_WORDS; ++j) {
             if (i == 0) {
                 prev = (!(tb_cflags(tb) & CF_PCREL) && j == 0 ? tb->pc : 0);
             } else {
-                prev = tcg_ctx->gen_insn_data[i - 1][j];
+                prev = insn_data[(i - 1) * TARGET_INSN_START_WORDS + j];
             }
-            p = encode_sleb128(p, tcg_ctx->gen_insn_data[i][j] - prev);
+            curr = insn_data[i * TARGET_INSN_START_WORDS + j];
+            p = encode_sleb128(p, curr - prev);
         }
-        prev = (i == 0 ? 0 : tcg_ctx->gen_insn_end_off[i - 1]);
-        p = encode_sleb128(p, tcg_ctx->gen_insn_end_off[i] - prev);
+        prev = (i == 0 ? 0 : insn_end_off[i - 1]);
+        curr = insn_end_off[i];
+        p = encode_sleb128(p, curr - prev);
 
         /* Test for (pending) buffer overflow.  The assumption is that any
            one row beginning below the high water mark cannot overrun
@@ -358,6 +363,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
     tcg_ctx->tlb_fast_offset =
         (int)offsetof(ArchCPU, neg.tlb.f) - (int)offsetof(ArchCPU, env);
 #endif
+    tcg_ctx->insn_start_words = TARGET_INSN_START_WORDS;
 
  tb_overflow:
 
@@ -451,7 +457,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
             fprintf(logfile, "OUT: [size=%d]\n", gen_code_size);
             fprintf(logfile,
                     "  -- guest addr 0x%016" PRIx64 " + tb prologue\n",
-                    tcg_ctx->gen_insn_data[insn][0]);
+                    tcg_ctx->gen_insn_data[insn * TARGET_INSN_START_WORDS]);
             chunk_start = tcg_ctx->gen_insn_end_off[insn];
             disas(logfile, tb->tc.ptr, chunk_start);
 
@@ -464,7 +470,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
                 size_t chunk_end = tcg_ctx->gen_insn_end_off[insn];
                 if (chunk_end > chunk_start) {
                     fprintf(logfile, "  -- guest addr 0x%016" PRIx64 "\n",
-                            tcg_ctx->gen_insn_data[insn][0]);
+                            tcg_ctx->gen_insn_data[insn * TARGET_INSN_START_WORDS]);
                     disas(logfile, tb->tc.ptr + chunk_start,
                           chunk_end - chunk_start);
                     chunk_start = chunk_end;