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[PATCH v3 07/16] tcg/mips: Allow JAL to be out of range in tcg_out_bswap
From: |
Richard Henderson |
Subject: |
[PATCH v3 07/16] tcg/mips: Allow JAL to be out of range in tcg_out_bswap_subr |
Date: |
Wed, 18 Aug 2021 10:19:22 -1000 |
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(-)
diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index 4019c22f3c..c65c4ee1f8 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -585,8 +585,10 @@ 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)
--
2.25.1
- [PATCH v3 00/16] tcg/mips: Unaligned access and other cleanup, Richard Henderson, 2021/08/18
- [PATCH v3 01/16] tcg/mips: Support unaligned access for user-only, Richard Henderson, 2021/08/18
- [PATCH v3 02/16] tcg/mips: Support unaligned access for softmmu, Richard Henderson, 2021/08/18
- [PATCH v3 06/16] tcg/mips: Unify TCG_GUEST_BASE_REG tests, Richard Henderson, 2021/08/18
- [PATCH v3 08/16] tcg/mips: Unset TCG_TARGET_HAS_direct_jump, Richard Henderson, 2021/08/18
- [PATCH v3 04/16] tcg/mips: Move TCG_AREG0 to S8, Richard Henderson, 2021/08/18
- [PATCH v3 07/16] tcg/mips: Allow JAL to be out of range in tcg_out_bswap_subr,
Richard Henderson <=
- [PATCH v3 05/16] tcg/mips: Move TCG_GUEST_BASE_REG to S7, Richard Henderson, 2021/08/18
- [PATCH v3 11/16] tcg/mips: Split out tcg_out_movi_one, Richard Henderson, 2021/08/18
- [PATCH v3 03/16] tcg/mips: Drop inline markers, Richard Henderson, 2021/08/18
- [PATCH v3 09/16] tcg/mips: Drop special alignment for code_gen_buffer, Richard Henderson, 2021/08/18
- [PATCH v3 10/16] tcg/mips: Create and use TCG_REG_TB, Richard Henderson, 2021/08/18
- [PATCH v3 15/16] tcg/mips: Try tb-relative addresses in tcg_out_movi, Richard Henderson, 2021/08/18
- [PATCH v3 12/16] tcg/mips: Split out tcg_out_movi_two, Richard Henderson, 2021/08/18