[ARM/AArch64][testsuite] Add explicit dependency on Neon Cumulative Saturation flag

        * gcc.target/aarch64/advsimd-intrinsics/arm-neon-ref.h
        (Set_Neon_Cumulative_Sat): Add parameter.
        (__set_neon_cumulative_sat): Support new parameter.
        * gcc.target/aarch64/advsimd-intrinsics/binary_sat_op.inc
        (TEST_BINARY_SAT_OP1): Call Set_Neon_Cumulative_Sat with new
        argument.
        * gcc.target/aarch64/advsimd-intrinsics/unary_sat_op.inc
        (TEST_UNARY_SAT_OP1): Call Set_Neon_Cumulative_Sat with new
        argument.

From-SVN: r219764

gcc/testsuite/ChangeLog

+2015-01-16  Christophe Lyon  <christophe.lyon@linaro.org>
+
+        * gcc.target/aarch64/advsimd-intrinsics/arm-neon-ref.h
+        (Set_Neon_Cumulative_Sat): Add parameter.
+        (__set_neon_cumulative_sat): Support new parameter.
+        * gcc.target/aarch64/advsimd-intrinsics/binary_sat_op.inc
+        (TEST_BINARY_SAT_OP1): Call Set_Neon_Cumulative_Sat with new
+        argument.
+        * gcc.target/aarch64/advsimd-intrinsics/unary_sat_op.inc
+        (TEST_UNARY_SAT_OP1): Call Set_Neon_Cumulative_Sat with new
+        argument.
+
 2015-01-16  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	* g++.dg/tsan/vptr_benign_race.C: New testcase.

gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/arm-neon-ref.h

@@ -255,7 +255,11 @@ typedef union {
 #endif /* __ORDER_BIG_ENDIAN__ */
 
 #define Neon_Cumulative_Sat  __read_neon_cumulative_sat()
-#define Set_Neon_Cumulative_Sat(x)  __set_neon_cumulative_sat((x))
+/* We need a fake dependency to ensure correct ordering of asm
+   statements to preset the QC flag value, and Neon operators writing
+   to QC. */
+#define Set_Neon_Cumulative_Sat(x, depend)	\
+  __set_neon_cumulative_sat((x), (depend))
 
 #if defined(__aarch64__)
 static volatile int __read_neon_cumulative_sat (void) {
@@ -263,13 +267,12 @@ static volatile int __read_neon_cumulative_sat (void) {
     asm volatile ("mrs %0,fpsr" : "=r" (_afpscr_for_qc));
     return _afpscr_for_qc.b.QC;
 }
-static void __set_neon_cumulative_sat (int x) {
-    _ARM_FPSCR _afpscr_for_qc;
-    asm volatile ("mrs %0,fpsr" : "=r" (_afpscr_for_qc));
-    _afpscr_for_qc.b.QC = x;
-    asm volatile ("msr fpsr,%0" : : "r" (_afpscr_for_qc));
-    return;
-}
+#define __set_neon_cumulative_sat(x, depend) {				\
+    _ARM_FPSCR _afpscr_for_qc;						\
+    asm volatile ("mrs %0,fpsr" : "=r" (_afpscr_for_qc));		\
+    _afpscr_for_qc.b.QC = x;						\
+    asm volatile ("msr fpsr,%1" : "=X" (depend) : "r" (_afpscr_for_qc)); \
+  }
 #else
 static volatile int __read_neon_cumulative_sat (void) {
     _ARM_FPSCR _afpscr_for_qc;
@@ -277,13 +280,12 @@ static volatile int __read_neon_cumulative_sat (void) {
     return _afpscr_for_qc.b.QC;
 }
 
-static void __set_neon_cumulative_sat (int x) {
-    _ARM_FPSCR _afpscr_for_qc;
-    asm volatile ("vmrs %0,fpscr" : "=r" (_afpscr_for_qc));
-    _afpscr_for_qc.b.QC = x;
-    asm volatile ("vmsr fpscr,%0" : : "r" (_afpscr_for_qc));
-    return;
-}
+#define __set_neon_cumulative_sat(x, depend) {				\
+    _ARM_FPSCR _afpscr_for_qc;						\
+    asm volatile ("vmrs %0,fpscr" : "=r" (_afpscr_for_qc));		\
+    _afpscr_for_qc.b.QC = x;						\
+    asm volatile ("vmsr fpscr,%1" : "=X" (depend) : "r" (_afpscr_for_qc)); \
+  }
 #endif
 
 /* Declare expected cumulative saturation results, one for each

gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/binary_sat_op.inc

@@ -18,7 +18,7 @@ void FNNAME (INSN_NAME) (void)
   /* vector_res = OP(vector1,vector2), then store the result.  */
 
 #define TEST_BINARY_SAT_OP1(INSN, Q, T1, T2, W, N, EXPECTED_CUMULATIVE_SAT, CMT) \
-  Set_Neon_Cumulative_Sat(0);						\
+  Set_Neon_Cumulative_Sat(0, VECT_VAR(vector_res, T1, W, N));		\
   VECT_VAR(vector_res, T1, W, N) =					\
     INSN##Q##_##T2##W(VECT_VAR(vector1, T1, W, N),			\
 		      VECT_VAR(vector2, T1, W, N));			\

gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/unary_sat_op.inc

@@ -17,7 +17,7 @@ void FNNAME (INSN_NAME) (void)
 {
   /* y=OP(x), then store the result.  */
 #define TEST_UNARY_SAT_OP1(INSN, Q, T1, T2, W, N, EXPECTED_CUMULATIVE_SAT, CMT) \
-  Set_Neon_Cumulative_Sat(0);						\
+  Set_Neon_Cumulative_Sat(0, VECT_VAR(vector_res, T1, W, N));		\
   VECT_VAR(vector_res, T1, W, N) =					\
     INSN##Q##_##T2##W(VECT_VAR(vector, T1, W, N));			\
     vst1##Q##_##T2##W(VECT_VAR(result, T1, W, N),			\