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tcg/ppc: Fix failure in tcg_out_mem_long 

With rt != r0 on loads, we use rt for scratch.  If we need an index
register different from base, we can't use rt, but r0 is usable.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-id: 1403843160-30332-1-git-send-email-rth@twiddle.net
Tested-by: Cédric Le Goater <clg@fr.ibm.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2014-06-26 21:26:00 -07:00 committed by Peter Maydell
parent ff4873cb8c
commit d4cba13bdf
1 changed files with 4 additions and 1 deletions
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5
tcg/ppc/tcg-target.c
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@ -805,7 +805,10 @@ static void tcg_out_mem_long(TCGContext *s, int opi, int opx, TCGReg rt,
/* For unaligned, or very large offsets, use the indexed form. */
if (offset & align || offset != (int32_t)offset) {
tcg_debug_assert(rs != base && (!is_store || rs != rt));
if (rs == base) {
rs = TCG_REG_R0;
}
tcg_debug_assert(!is_store || rs != rt);
tcg_out_movi(s, TCG_TYPE_PTR, rs, orig);
tcg_out32(s, opx | TAB(rt, base, rs));
return;