tcg/ppc: Use constant pool for movi

Signed-off-by: Richard Henderson <rth@twiddle.net>
qemu · Sep 7, 2017 · 53c89ef · 53c89ef
1 parent 77bfc7c
commit 53c89ef
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Showing 2 changed files with 31 additions and 4 deletions.
diff --git a/tcg/ppc/tcg-target.h b/tcg/ppc/tcg-target.h
@@ -132,5 +132,6 @@ void tb_target_set_jmp_target(uintptr_t, uintptr_t, uintptr_t);
 #ifdef CONFIG_SOFTMMU
 #define TCG_TARGET_NEED_LDST_LABELS
 #endif
+#define TCG_TARGET_NEED_POOL_LABELS
 
 #endif
diff --git a/tcg/ppc/tcg-target.inc.c b/tcg/ppc/tcg-target.inc.c
@@ -22,6 +22,9 @@
  * THE SOFTWARE.
  */
 
+#include "elf.h"
+#include "tcg-pool.inc.c"
+
 #if defined _CALL_DARWIN || defined __APPLE__
 #define TCG_TARGET_CALL_DARWIN
 #endif
@@ -58,8 +61,6 @@
 
 static tcg_insn_unit *tb_ret_addr;
 
-#include "elf.h"
-
 bool have_isa_2_06;
 bool have_isa_3_00;
 
@@ -224,16 +225,25 @@ static inline void tcg_out_bc_noaddr(TCGContext *s, int insn)
 static void patch_reloc(tcg_insn_unit *code_ptr, int type,
                         intptr_t value, intptr_t addend)
 {
-    tcg_insn_unit *target = (tcg_insn_unit *)value;
+    tcg_insn_unit *target;
+    tcg_insn_unit old;
+
+    value += addend;
+    target = (tcg_insn_unit *)value;
 
-    tcg_debug_assert(addend == 0);
     switch (type) {
     case R_PPC_REL14:
         reloc_pc14(code_ptr, target);
         break;
     case R_PPC_REL24:
         reloc_pc24(code_ptr, target);
         break;
+    case R_PPC_ADDR16:
+        assert(value == (int16_t)value);
+        old = *code_ptr;
+        old = deposit32(old, 0, 16, value);
+        *code_ptr = old;
+        break;
     default:
         tcg_abort();
     }
@@ -676,6 +686,14 @@ static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret,
         return;
     }
 
+    /* Use the constant pool, if possible.  */
+    if (!in_prologue && USE_REG_TB) {
+        new_pool_label(s, arg, R_PPC_ADDR16, s->code_ptr,
+                       -(intptr_t)s->code_gen_ptr);
+        tcg_out32(s, LD | TAI(ret, TCG_REG_TB, 0));
+        return;
+    }
+
     tmp = arg >> 31 >> 1;
     tcg_out_movi(s, TCG_TYPE_I32, ret, tmp);
     if (tmp) {
@@ -1858,6 +1876,14 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
 #endif
 }
 
+static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
+{
+    int i;
+    for (i = 0; i < count; ++i) {
+        p[i] = NOP;
+    }
+}
+
 /* Parameters for function call generation, used in tcg.c.  */
 #define TCG_TARGET_STACK_ALIGN       16
 #define TCG_TARGET_EXTEND_ARGS       1