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tcg/arm: Fix goto_tb for large translation blocks

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Correct arithmetic for separating high and low
on a large negative number.

Cc: qemu-stable@nongnu.org
Fixes: 79ffece444 ("tcg/arm: Implement direct branch for goto_tb")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1714
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Richard Henderson 2024-02-12 20:38:18 +00:00
parent c0e688153f
commit e41f1825b4
1 changed files with 2 additions and 2 deletions
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4
tcg/arm/tcg-target.c.inc
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@ -1771,9 +1771,9 @@ static void tcg_out_goto_tb(TCGContext *s, int which)
* shifted immediate from pc. * shifted immediate from pc.
*/ */
int h = -i_disp; int h = -i_disp;
int l = h & 0xfff; int l = -(h & 0xfff);
h = encode_imm_nofail(h - l); h = encode_imm_nofail(h + l);
tcg_out_dat_imm(s, COND_AL, ARITH_SUB, TCG_REG_R0, TCG_REG_PC, h); tcg_out_dat_imm(s, COND_AL, ARITH_SUB, TCG_REG_R0, TCG_REG_PC, h);
tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_R0, l); tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_R0, l);
} }