[PATCH] RISC-V: Fix reduc_strict_run-1 test case.

[Robin Dapp via Gcc-patches]

Hi,

this patch changes the equality check for the reduc_strict_run-1
testcase from == to fabs () < EPS.  The FAIL only occurs with
_Float16 but I'd argue approximate equality is preferable for all
float modes.

Regards
 Robin

gcc/testsuite/ChangeLog:

        * gcc.target/riscv/rvv/autovec/reduc/reduc_strict_run-1.c:
        Check float equality with fabs < EPS.
---
 .../riscv/rvv/autovec/reduc/reduc_strict_run-1.c         | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git 
a/gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc_strict_run-1.c 
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc_strict_run-1.c
index 516be97e9eb..93efe2c4333 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc_strict_run-1.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc_strict_run-1.c
@@ -2,6 +2,9 @@
 /* { dg-additional-options "--param=riscv-autovec-preference=scalable 
-fno-vect-cost-model" } */
 
 #include "reduc_strict-1.c"
+#include <math.h>
+
+#define EPS 1e-2
 
 #define TEST_REDUC_PLUS(TYPE)                  \
   {                                            \
@@ -10,14 +13,14 @@
     TYPE r = 0, q = 3;                         \
     for (int i = 0; i < NUM_ELEMS (TYPE); i++) \
       {                                                \
-       a[i] = (i * 0.1) * (i & 1 ? 1 : -1);    \
-       b[i] = (i * 0.3) * (i & 1 ? 1 : -1);    \
+       a[i] = (i * 0.01) * (i & 1 ? 1 : -1);   \
+       b[i] = (i * 0.03) * (i & 1 ? 1 : -1);   \
        r += a[i];                              \
        q -= b[i];                              \
        asm volatile ("" ::: "memory");         \
       }                                                \
     TYPE res = reduc_plus_##TYPE (a, b);       \
-    if (res != r * q)                          \
+    if (fabs (res - r * q) > EPS)              \
       __builtin_abort ();                      \
   }
 
-- 
2.41.0