From patchwork Tue Feb 9 20:33:09 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [1/2] tcg: Add tcg_swap_cond. Date: Tue, 09 Feb 2010 10:33:09 -0000 From: Richard Henderson X-Patchwork-Id: 44963 Message-Id: To: qemu-devel@nongnu.org Cc: blauwirbel@gmail.com Returns the condition as if with swapped comparison operands. --- tcg/tcg.h | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/tcg/tcg.h b/tcg/tcg.h index b218abe..563eccd 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -205,11 +205,19 @@ typedef enum { TCG_COND_GTU, } TCGCond; +/* Invert the sense of the comparison. */ static inline TCGCond tcg_invert_cond(TCGCond c) { return (TCGCond)(c ^ 1); } +/* Swap the operands in a comparison. */ +static inline TCGCond tcg_swap_cond(TCGCond c) +{ + int mask = (c < TCG_COND_LT ? 0 : c < TCG_COND_LTU ? 7 : 15); + return (TCGCond)(c ^ mask); +} + static inline TCGCond tcg_unsigned_cond(TCGCond c) { return (c >= TCG_COND_LT && c <= TCG_COND_GT ? c + 4 : c);