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tcg/s390x: Use LARL+AGHI for odd addresses 

Add one instead of dropping odd addresses to the constant pool.

Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-11-30 01:27:28 +00:00
parent 238da1c942
commit 1b74cf6ea2
1 changed files with 8 additions and 7 deletions
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15
tcg/s390x/tcg-target.c.inc
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@ -806,6 +806,7 @@ static void tcg_out_movi(TCGContext *s, TCGType type,
TCGReg ret, tcg_target_long sval)
{
tcg_target_ulong uval;
ptrdiff_t pc_off;
/* Try all 32-bit insns that can load it in one go. */
if (maybe_out_small_movi(s, type, ret, sval)) {
@ -832,14 +833,14 @@ static void tcg_out_movi(TCGContext *s, TCGType type,
return;
}
/* Try for PC-relative address load. For odd addresses,
attempt to use an offset from the start of the TB. */
if ((sval & 1) == 0) {
ptrdiff_t off = tcg_pcrel_diff(s, (void *)sval) >> 1;
if (off == (int32_t)off) {
tcg_out_insn(s, RIL, LARL, ret, off);
return;
/* Try for PC-relative address load. For odd addresses, add one. */
pc_off = tcg_pcrel_diff(s, (void *)sval) >> 1;
if (pc_off == (int32_t)pc_off) {
tcg_out_insn(s, RIL, LARL, ret, pc_off);
if (sval & 1) {
tcg_out_insn(s, RI, AGHI, ret, 1);
}
return;
}
/* Otherwise, stuff it in the constant pool. */