use 32-bit bitreversal loop index

With GCC 8.3.1: arm_bitreversal_16 - saves 1 instruction arm_bitreversal_64 - saves 5 instructions
3 years ago · da7226d141
parent f757add3bb
commit da7226d141
1 changed files with 4 additions and 2 deletions
--- a/Source/TransformFunctions/arm_bitreversal2.c
+++ b/Source/TransformFunctions/arm_bitreversal2.c
@ -43,7 +43,8 @@ void arm_bitreversal_64(
  const uint16_t bitRevLen,
  const uint16_t *pBitRevTab)
 {
-  uint64_t a, b, i, tmp;
+  uint64_t a, b, tmp;
+  uint32_t i;

  for (i = 0; i < bitRevLen; )
  {
@ -112,7 +113,8 @@ void arm_bitreversal_16(
  const uint16_t bitRevLen,
  const uint16_t *pBitRevTab)
 {
-  uint16_t a, b, i, tmp;
+  uint16_t a, b, tmp;
+  uint32_t i;

  for (i = 0; i < bitRevLen; )
  {