Partial correction to issue #306

MVE and scalar now behave the same for q7 and q15.
They also probably behave the same for q31 but with stricter test
criteria the q31 test fails. Python reference code for q31 must be
looked at to confirm.

Neon tests have not yet been run.

Author: christophe0606

Source/SupportFunctions/arm_float_to_q15.c

@@ -68,7 +68,7 @@ ARM_DSP_ATTRIBUTE void arm_float_to_q15(
   uint32_t blockSize)
 {
     uint32_t         blkCnt;
-    float32_t       maxQ = (float32_t) Q15_MAX;
+    float32_t       maxQ = (float32_t) (Q15_MAX) + 1.0f;
     f32x4x2_t       tmp;
     q15x8_t         vecDst = { 0 };
 #ifdef ARM_MATH_ROUNDING

Source/SupportFunctions/arm_float_to_q31.c

@@ -78,7 +78,7 @@ ARM_DSP_ATTRIBUTE void arm_float_to_q31(
   uint32_t blockSize)
 {
     uint32_t         blkCnt;
-    float32_t       maxQ = (float32_t) Q31_MAX;
+    float32_t       maxQ = (float32_t) (Q31_MAX) + 1.0f;
     f32x4_t         vecDst;
 #ifdef ARM_MATH_ROUNDING
     float32_t in;

Testing/Source/Tests/SupportTestsF32.cpp

@@ -6,9 +6,9 @@
 
 #define SNR_THRESHOLD 120
 #define REL_ERROR (1.0e-5)
-#define ABS_Q15_ERROR ((q15_t)10)
-#define ABS_Q31_ERROR ((q31_t)80)
-#define ABS_Q7_ERROR ((q7_t)10)
+#define ABS_Q15_ERROR ((q15_t)0)
+#define ABS_Q31_ERROR ((q31_t)0)
+#define ABS_Q7_ERROR ((q7_t)0)
 
 
 void SupportTestsF32::test_weighted_average_f32()