Unverified Commit a8f4056f authored by Richard Allen's avatar Richard Allen Committed by GitHub
Browse files

use 32-bit bitreversal loop index (#81) 

With GCC 8.3.1:
arm_bitreversal_16 - saves 1 instruction
arm_bitreversal_64 - saves 5 instructions
parent bd4b47a2

Source/TransformFunctions/arm_bitreversal2.c

+4 −2
Original line number Diff line number Diff line
@@ -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; )

  {

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