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tcg/ppc: Use new registers for LQ destination

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LQ has a constraint that RTp != RA, else SIGILL.
Therefore, force the destination of INDEX_op_qemu_*_ld128 to be a
new register pair, so that it cannot overlap the input address.

This requires new support in process_op_defs and tcg_reg_alloc_op.

Cc: qemu-stable@nongnu.org
Fixes: 526cd4ec01 ("tcg/ppc: Support 128-bit load/store")
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240102013456.131846-1-richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-01-02 01:27:18 +00:00
parent afa37be4b4
commit ca5bed07d0
3 changed files with 19 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

2
tcg/ppc/tcg-target-con-set.h
View file

@ -35,7 +35,7 @@ C_O1_I3(v, v, v, v)
C_O1_I4(r, r, ri, rZ, rZ)
C_O1_I4(r, r, r, ri, ri)
C_O2_I1(r, r, r)
C_O2_I1(o, m, r)
C_N1O1_I1(o, m, r)
C_O2_I2(r, r, r, r)
C_O2_I4(r, r, rI, rZM, r, r)
C_O2_I4(r, r, r, r, rI, rZM)

3
tcg/ppc/tcg-target.c.inc
View file

@ -2595,6 +2595,7 @@ static void tcg_out_qemu_ldst_i128(TCGContext *s, TCGReg datalo, TCGReg datahi,
tcg_debug_assert(!need_bswap);
tcg_debug_assert(datalo & 1);
tcg_debug_assert(datahi == datalo - 1);
tcg_debug_assert(!is_ld || datahi != index);
insn = is_ld ? LQ : STQ;
tcg_out32(s, insn | TAI(datahi, index, 0));
} else {
@ -4071,7 +4072,7 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
case INDEX_op_qemu_ld_a32_i128:
case INDEX_op_qemu_ld_a64_i128:
return C_O2_I1(o, m, r);
return C_N1O1_I1(o, m, r);
case INDEX_op_qemu_st_a32_i128:
case INDEX_op_qemu_st_a64_i128:
return C_O0_I3(o, m, r);