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target-mips: pass 0 instead of -1 as rs in microMIPS LUI instruction

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Using rs = -1 in gen_logic_imm() for microMIPS LUI instruction is dangerous
and may bite us when implementing microMIPS R6 because in R6 AUI and LUI
are distinguished by rs value. Therefore use 0 for safety.

Backports commit 5e88759a52934a32502298f2c78c6dfaa144364b from qemu
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Leon Alrae 2018-02-11 17:17:46 -05:00 committed by Lioncash
parent 69974ce1dc
commit da22a00c10
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1 changed files with 1 additions and 1 deletions
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qemu/target-mips/translate.c
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@ -13754,7 +13754,7 @@ static void decode_micromips32_opc (CPUMIPSState *env, DisasContext *ctx,
target. */
break;
case LUI:
gen_logic_imm(ctx, OPC_LUI, rs, -1, imm);
gen_logic_imm(ctx, OPC_LUI, rs, 0, imm);
break;
case SYNCI:
/* Break the TB to be able to sync copied instructions