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[PULL,33/35] tcg/mips: Allow JAL to be out of range in tcg_out_bswap_subr

Message ID 20210916153025.1944763-34-richard.henderson@linaro.org
State Superseded
Headers show
Series tcg patch queue | expand

Commit Message

Richard Henderson Sept. 16, 2021, 3:30 p.m. UTC
Weaning off of unique alignment requirements, so allow JAL
to not reach the target.  TCG_TMP1 is always available for
use as a scratch because it is clobbered by the subroutine
being called.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

---
 tcg/mips/tcg-target.c.inc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

-- 
2.25.1
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Patch

diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index 320795a637..3a40af8799 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -573,8 +573,10 @@  static void tcg_out_bswap16(TCGContext *s, TCGReg ret, TCGReg arg, int flags)
 
 static void tcg_out_bswap_subr(TCGContext *s, const tcg_insn_unit *sub)
 {
-    bool ok = tcg_out_opc_jmp(s, OPC_JAL, sub);
-    tcg_debug_assert(ok);
+    if (!tcg_out_opc_jmp(s, OPC_JAL, sub)) {
+        tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP1, (uintptr_t)sub);
+        tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, TCG_TMP1, 0);
+    }
 }
 
 static void tcg_out_bswap32(TCGContext *s, TCGReg ret, TCGReg arg, int flags)