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tcg: Add tcg_swap_cond. 

Returns the condition as if with swapped comparison operands.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Richard Henderson 2010-02-09 12:33:09 -08:00 committed by Blue Swirl
parent bf76bafa5a
commit 1c086220a6
1 changed files with 8 additions and 0 deletions
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8
tcg/tcg.h
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@ -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);