From f9a716325facc32064d491ddbce4aa2e81f9a1ce Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Sun, 23 Mar 2014 17:45:23 +0000 Subject: [PATCH] tcg-mips: Split large ldst offsets Use this to reduce goto_tb by one insn. Reviewed-by: Paolo Bonzini Signed-off-by: Richard Henderson --- tcg/mips/tcg-target.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/tcg/mips/tcg-target.c b/tcg/mips/tcg-target.c index 2d2073f7e9..5ccfb1d76c 100644 --- a/tcg/mips/tcg-target.c +++ b/tcg/mips/tcg-target.c @@ -480,16 +480,18 @@ static inline void tcg_out_ext16s(TCGContext *s, TCGReg ret, TCGReg arg) } } -static inline void tcg_out_ldst(TCGContext *s, int opc, TCGArg arg, - TCGReg arg1, TCGArg arg2) +static void tcg_out_ldst(TCGContext *s, int opc, TCGReg data, + TCGReg addr, intptr_t ofs) { - if (arg2 == (int16_t) arg2) { - tcg_out_opc_imm(s, opc, arg, arg1, arg2); - } else { - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_AT, arg2); - tcg_out_opc_reg(s, OPC_ADDU, TCG_REG_AT, TCG_REG_AT, arg1); - tcg_out_opc_imm(s, opc, arg, TCG_REG_AT, 0); + int16_t lo = ofs; + if (ofs != lo) { + tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_AT, ofs - lo); + if (addr != TCG_REG_ZERO) { + tcg_out_opc_reg(s, OPC_ADDU, TCG_REG_AT, TCG_REG_AT, addr); + } + addr = TCG_REG_AT; } + tcg_out_opc_imm(s, opc, data, addr, lo); } static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, @@ -1315,9 +1317,8 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, tcg_abort(); } else { /* indirect jump method */ - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_AT, - (uintptr_t)(s->tb_next + args[0])); - tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_AT, TCG_REG_AT, 0); + tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_AT, TCG_REG_ZERO, + (uintptr_t)(s->tb_next + args[0])); tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_AT, 0); } tcg_out_nop(s); -- 2.11.0