diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2022-11-30 01:27:28 +0000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-01-06 23:07:04 +0000 |
| commit | 1b74cf6ea2782f4ffdecc85fdd22b2082a08502d (patch) | |
| tree | fbbf3064f5b8cc6c504d541069f310fb55838cc8 | |
| parent | 238da1c942037412033a08288f73bc9815bb8c2c (diff) | |
| download | qemu-1b74cf6ea2782f4ffdecc85fdd22b2082a08502d.zip qemu-1b74cf6ea2782f4ffdecc85fdd22b2082a08502d.tar.gz qemu-1b74cf6ea2782f4ffdecc85fdd22b2082a08502d.tar.bz2 | |
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>
| -rw-r--r-- | tcg/s390x/tcg-target.c.inc | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/tcg/s390x/tcg-target.c.inc b/tcg/s390x/tcg-target.c.inc index e4403ff..6cf0715 100644 --- a/tcg/s390x/tcg-target.c.inc +++ b/tcg/s390x/tcg-target.c.inc @@ -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. */ |