target-ppc: fix SPE evcmp* instructions

The CRF_{CH,CL,CH_OR_CL,CH_AND_CL} constants were all off by one bit
position.  Because of this, the SPE evcmp* family of instructions would
store values in the result condition register that were also off by one
bit position.

Fixed by using the CRF_{LT,GT,EQ,SO} constants for the shift amounts.
Signed-off-by: NNathan Froyd <froydnj@codesourcery.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

target-ppc/cpu.h

@@ -834,10 +834,10 @@ static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
 #define CRF_GT        2
 #define CRF_EQ        1
 #define CRF_SO        0
-#define CRF_CH        (1 << 4)
-#define CRF_CL        (1 << 3)
-#define CRF_CH_OR_CL  (1 << 2)
-#define CRF_CH_AND_CL (1 << 1)
+#define CRF_CH        (1 << CRF_LT)
+#define CRF_CL        (1 << CRF_GT)
+#define CRF_CH_OR_CL  (1 << CRF_EQ)
+#define CRF_CH_AND_CL (1 << CRF_SO)
 
 /* XER definitions */
 #define XER_SO  31