On Thu, Apr 04, 2013 at 05:56:20PM -0500, Richard Henderson wrote:
> It takes half the cycles to read one CR register instead of all 8.
> This is a backward compatible addition to the ISA, so chips prior
> to Power 2.00 spec will simply continue to read the entire CR register.
>
> Signed-off-by: Richard Henderson <r...@twiddle.net>
> ---
> tcg/ppc64/tcg-target.c | 12 ++++++++----
> 1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/tcg/ppc64/tcg-target.c b/tcg/ppc64/tcg-target.c
> index 806f3e2..f0ed698 100644
> --- a/tcg/ppc64/tcg-target.c
> +++ b/tcg/ppc64/tcg-target.c
> @@ -382,6 +382,7 @@ static int tcg_target_const_match (tcg_target_long val,
> #define SRAWI XO31(824)
> #define NEG XO31(104)
> #define MFCR XO31( 19)
> +#define MFOCRF (MFCR | (1u << 20))
> #define NOR XO31(124)
> #define CNTLZW XO31( 26)
> #define CNTLZD XO31( 58)
> @@ -430,6 +431,7 @@ static int tcg_target_const_match (tcg_target_long val,
> #define ME(e) ((e)<<1)
> #define BO(o) ((o)<<21)
> #define MB64(b) ((b)<<5)
> +#define FXM(b) (1 << (19 - (b)))
>
> #define LK 1
>
> @@ -1226,10 +1228,12 @@ static void tcg_out_setcond (TCGContext *s, TCGType
> type, TCGCond cond,
> sh = 31;
> crop = CRNOR | BT (7, CR_EQ) | BA (7, CR_GT) | BB (7, CR_GT);
> crtest:
> - tcg_out_cmp (s, cond, arg1, arg2, const_arg2, 7, type);
> - if (crop) tcg_out32 (s, crop);
> - tcg_out32 (s, MFCR | RT (0));
> - tcg_out_rlw(s, RLWINM, arg0, 0, sh, 31, 31);
> + tcg_out_cmp(s, cond, arg1, arg2, const_arg2, 7, type);
> + if (crop) {
> + tcg_out32(s, crop);
> + }
> + tcg_out32(s, MFOCRF | RT(TCG_REG_R0) | FXM(7));
> + tcg_out_rlw(s, RLWINM, arg0, TCG_REG_R0, sh, 31, 31);
> break;
>
> default:
Reviewed-by: Aurelien Jarno <aurel...@aurel32.net>
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurel...@aurel32.net http://www.aurel32.net
