[Qemu-devel] [5466] Only use __builtin_* with GCC >= 3.4

[Aurelien Jarno]

Revision: 5466
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5466
Author:   aurel32
Date:     2008-10-12 11:44:36 +0000 (Sun, 12 Oct 2008)

Log Message:
-----------
Only use __builtin_* with GCC >= 3.4

Fix gcc 3.3 builds, broken in revision 5465.

Signed-off-by: Aurelien Jarno <address@hidden>

Revision Links:
--------------
    http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5465

Modified Paths:
--------------
    trunk/host-utils.h
    trunk/hw/apic.c

Modified: trunk/host-utils.h
===================================================================
--- trunk/host-utils.h  2008-10-12 00:53:17 UTC (rev 5465)
+++ trunk/host-utils.h  2008-10-12 11:44:36 UTC (rev 5466)
@@ -51,7 +51,7 @@
 
 static always_inline int clz32(uint32_t val)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ 
>= 4))
     if (val)
         return __builtin_clz(val);
     else
@@ -93,7 +93,7 @@
 
 static always_inline int clz64(uint64_t val)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ 
>= 4))
     if (val)
         return __builtin_clzll(val);
     else
@@ -118,7 +118,7 @@
 
 static always_inline int ctz32 (uint32_t val)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ 
>= 4))
     if (val)
         return __builtin_ctz(val);
     else
@@ -162,7 +162,7 @@
 
 static always_inline int ctz64 (uint64_t val)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ 
>= 4))
     if (val)
         return __builtin_ctz(val);
     else
@@ -206,7 +206,7 @@
 
 static always_inline int ctpop32 (uint32_t val)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ 
>= 4))
     return __builtin_popcount(val);
 #else
     val = (val & 0x55555555) + ((val >>  1) & 0x55555555);
@@ -221,7 +221,7 @@
 
 static always_inline int ctpop64 (uint64_t val)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ 
>= 4))
     return __builtin_popcountll(val);
 #else
     val = (val & 0x5555555555555555ULL) + ((val >>  1) & 
0x5555555555555555ULL);

Modified: trunk/hw/apic.c
===================================================================
--- trunk/hw/apic.c     2008-10-12 00:53:17 UTC (rev 5465)
+++ trunk/hw/apic.c     2008-10-12 11:44:36 UTC (rev 5466)
@@ -107,7 +107,7 @@
 /* Find first bit starting from msb */
 static int fls_bit(uint32_t value)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ 
>= 4))
     return 31 - __builtin_clz(value);
 #else
     unsigned int ret = 0;
@@ -127,7 +127,7 @@
 /* Find first bit starting from lsb */
 static int ffs_bit(uint32_t value)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ 
>= 4))
     return __builtin_ffs(value) - 1;
 #else
     unsigned int ret = 0;