From 240c08d0998f402c325fce489de0d14831048128 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Sat, 16 Mar 2019 17:48:32 +0000 Subject: tcg: Support cross-class moves without instruction support PowerPC Altivec does not support direct moves between vector registers and general registers. So when tcg_out_mov fails, we can use the backing memory for the temporary to perform the move. Acked-by: David Hildenbrand Signed-off-by: Richard Henderson --- tcg/tcg.c | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) (limited to 'tcg/tcg.c') diff --git a/tcg/tcg.c b/tcg/tcg.c index 8ed7cb8654..68d86361e2 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -3368,7 +3368,20 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOp *op) ots->indirect_base); } if (!tcg_out_mov(s, otype, ots->reg, ts->reg)) { - abort(); + /* + * Cross register class move not supported. + * Store the source register into the destination slot + * and leave the destination temp as TEMP_VAL_MEM. + */ + assert(!ots->fixed_reg); + if (!ts->mem_allocated) { + temp_allocate_frame(s, ots); + } + tcg_out_st(s, ts->type, ts->reg, + ots->mem_base->reg, ots->mem_offset); + ots->mem_coherent = 1; + temp_free_or_dead(s, ots, -1); + return; } } ots->val_type = TEMP_VAL_REG; @@ -3470,7 +3483,13 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op) reg = tcg_reg_alloc(s, arg_ct->u.regs, i_allocated_regs, o_preferred_regs, ts->indirect_base); if (!tcg_out_mov(s, ts->type, reg, ts->reg)) { - abort(); + /* + * Cross register class move not supported. Sync the + * temp back to its slot and load from there. + */ + temp_sync(s, ts, i_allocated_regs, 0, 0); + tcg_out_ld(s, ts->type, reg, + ts->mem_base->reg, ts->mem_offset); } } new_args[i] = reg; @@ -3631,7 +3650,13 @@ static void tcg_reg_alloc_call(TCGContext *s, TCGOp *op) if (ts->reg != reg) { tcg_reg_free(s, reg, allocated_regs); if (!tcg_out_mov(s, ts->type, reg, ts->reg)) { - abort(); + /* + * Cross register class move not supported. Sync the + * temp back to its slot and load from there. + */ + temp_sync(s, ts, allocated_regs, 0, 0); + tcg_out_ld(s, ts->type, reg, + ts->mem_base->reg, ts->mem_offset); } } } else { -- cgit v1.2.3