Re: [Qemu-devel] [PATCH 11/18] tcg/arm: add bswap ops

[Paul Brook]

> +static inline void tcg_out_bswap32(TCGContext *s, int cond, int rd, int rn)
> +#else
> +    /* This code only uses one temporary register. There is probably
> +       a faster way to do that with more temporary registers. */

You can do better even without a temporary:

  eor   r8, rn, rn, ror #16
  bic   r8, r8, #0x00ff0000
  mov    rd, rn, ror #8
  eor   rd, rd, r8, lsr #8

Paul