[PULL 04/23] tcg/ppc: Create TCGPowerISA and have_isa

[Richard Henderson]

Introduce an enum to hold base < 2.06 < 3.00.  Use macros to
preserve the existing have_isa_2_06 and have_isa_3_00 predicates.

Reviewed-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
 tcg/ppc/tcg-target.h     | 12 ++++++++++--
 tcg/ppc/tcg-target.inc.c |  8 ++++----
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/tcg/ppc/tcg-target.h b/tcg/ppc/tcg-target.h
index 690fa744e1..35ba8693fa 100644
--- a/tcg/ppc/tcg-target.h
+++ b/tcg/ppc/tcg-target.h
@@ -58,8 +58,16 @@ typedef enum {
     TCG_AREG0 = TCG_REG_R27
 } TCGReg;
 
-extern bool have_isa_2_06;
-extern bool have_isa_3_00;
+typedef enum {
+    tcg_isa_base,
+    tcg_isa_2_06,
+    tcg_isa_3_00,
+} TCGPowerISA;
+
+extern TCGPowerISA have_isa;
+
+#define have_isa_2_06  (have_isa >= tcg_isa_2_06)
+#define have_isa_3_00  (have_isa >= tcg_isa_3_00)
 
 /* optional instructions automatically implemented */
 #define TCG_TARGET_HAS_ext8u_i32        0 /* andi */
diff --git a/tcg/ppc/tcg-target.inc.c b/tcg/ppc/tcg-target.inc.c
index 4aad5d2b36..0bfaef9418 100644
--- a/tcg/ppc/tcg-target.inc.c
+++ b/tcg/ppc/tcg-target.inc.c
@@ -64,8 +64,7 @@
 
 static tcg_insn_unit *tb_ret_addr;
 
-bool have_isa_2_06;
-bool have_isa_3_00;
+TCGPowerISA have_isa;
 
 #define HAVE_ISA_2_06  have_isa_2_06
 #define HAVE_ISEL      have_isa_2_06
@@ -2787,12 +2786,13 @@ static void tcg_target_init(TCGContext *s)
     unsigned long hwcap = qemu_getauxval(AT_HWCAP);
     unsigned long hwcap2 = qemu_getauxval(AT_HWCAP2);
 
+    have_isa = tcg_isa_base;
     if (hwcap & PPC_FEATURE_ARCH_2_06) {
-        have_isa_2_06 = true;
+        have_isa = tcg_isa_2_06;
     }
 #ifdef PPC_FEATURE2_ARCH_3_00
     if (hwcap2 & PPC_FEATURE2_ARCH_3_00) {
-        have_isa_3_00 = true;
+        have_isa = tcg_isa_3_00;
     }
 #endif
 
-- 
2.17.1