diff mbox

[v2] tcg/i386: Fix build for systems without working cpuid.h (MacOSX, Win32)

Message ID 1392925373-14393-1-git-send-email-peter.maydell@linaro.org
State Accepted
Commit 774d566cdbebb916af9760dac629aa7c1adf9d3d
Headers show

Commit Message

Peter Maydell Feb. 20, 2014, 7:42 p.m. UTC
Win32 doesn't have a cpuid.h, and MacOSX may have one but without
the __cpuid() function we use, which means that commit 9d2eec20
broke the build for those platforms. Fix this by tightening up
our configure cpuid.h check to test that the functions we need
are present, and adding some missing #ifdef guards in
tcg/i386/tcg-target.c.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
Changes v1->v2: fix typo in commit message, add __cpuid_count()
 to the configure test

 configure             | 13 ++++++++++++-
 tcg/i386/tcg-target.c |  4 +++-
 2 files changed, 15 insertions(+), 2 deletions(-)

Comments

Peter Maydell Feb. 21, 2014, 11:36 a.m. UTC | #1
On 20 February 2014 21:08, Richard Henderson <rth@twiddle.net> wrote:
> On 02/20/2014 01:42 PM, Peter Maydell wrote:
>> Win32 doesn't have a cpuid.h, and MacOSX may have one but without
>> the __cpuid() function we use, which means that commit 9d2eec20
>> broke the build for those platforms. Fix this by tightening up
>> our configure cpuid.h check to test that the functions we need
>> are present, and adding some missing #ifdef guards in
>> tcg/i386/tcg-target.c.
>>
>> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
>> ---
>> Changes v1->v2: fix typo in commit message, add __cpuid_count()
>>  to the configure test
>>
>>  configure             | 13 ++++++++++++-
>>  tcg/i386/tcg-target.c |  4 +++-
>>  2 files changed, 15 insertions(+), 2 deletions(-)
>
> Reviewed-by: Richard Henderson <rth@twiddle.net>

Thanks; applied to master.

-- PMM
diff mbox

Patch

diff --git a/configure b/configure
index 4648117..79eb54c 100755
--- a/configure
+++ b/configure
@@ -3564,7 +3564,18 @@  cpuid_h=no
 cat > $TMPC << EOF
 #include <cpuid.h>
 int main(void) {
-  return 0;
+    unsigned a, b, c, d;
+    int max = __get_cpuid_max(0, 0);
+
+    if (max >= 1) {
+        __cpuid(1, a, b, c, d);
+    }
+
+    if (max >= 7) {
+        __cpuid_count(7, 0, a, b, c, d);
+    }
+
+    return 0;
 }
 EOF
 if compile_prog "" "" ; then
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c
index fef1717..f832282 100644
--- a/tcg/i386/tcg-target.c
+++ b/tcg/i386/tcg-target.c
@@ -115,7 +115,7 @@  static const int tcg_target_call_oarg_regs[] = {
    is available.  */
 #if TCG_TARGET_REG_BITS == 64
 # define have_cmov 1
-#elif defined(CONFIG_CPUID_H)
+#elif defined(CONFIG_CPUID_H) && defined(bit_CMOV)
 static bool have_cmov;
 #else
 # define have_cmov 0
@@ -2295,6 +2295,7 @@  static void tcg_target_qemu_prologue(TCGContext *s)
 
 static void tcg_target_init(TCGContext *s)
 {
+#ifdef CONFIG_CPUID_H
     unsigned a, b, c, d;
     int max = __get_cpuid_max(0, 0);
 
@@ -2323,6 +2324,7 @@  static void tcg_target_init(TCGContext *s)
         have_bmi2 = (b & bit_BMI2) != 0;
 #endif
     }
+#endif
 
     if (TCG_TARGET_REG_BITS == 64) {
         tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff);