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tcg-sparc: Use ADDXC in setcond_i64 

Similar to the ADDC tricks we use in setcond_i32.

Signed-off-by: Richard Henderson <rth@twiddle.net>
master
Richard Henderson 2014-08-06 12:11:25 -07:00 committed by Richard Henderson
parent 321b6c0585
commit 9d6a7a8542
1 changed files with 17 additions and 0 deletions
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17
tcg/sparc/tcg-target.c
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@ -716,6 +716,23 @@ static void tcg_out_setcond_i32(TCGContext *s, TCGCond cond, TCGReg ret,
static void tcg_out_setcond_i64(TCGContext *s, TCGCond cond, TCGReg ret,
TCGReg c1, int32_t c2, int c2const)
{
if (use_vis3_instructions) {
switch (cond) {
case TCG_COND_NE:
if (c2 != 0) {
break;
}
c2 = c1, c2const = 0, c1 = TCG_REG_G0;
/* FALLTHRU */
case TCG_COND_LTU:
tcg_out_cmp(s, c1, c2, c2const);
tcg_out_arith(s, ret, TCG_REG_G0, TCG_REG_G0, ARITH_ADDXC);
return;
default:
break;
}
}
/* For 64-bit signed comparisons vs zero, we can avoid the compare
if the input does not overlap the output. */
if (c2 == 0 && !is_unsigned_cond(cond) && c1 != ret) {