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| author | Richard Henderson <rth@twiddle.net> | 2014-03-23 17:45:23 +0000 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2014-05-24 08:45:13 -0700 |
| commit | f9a716325facc32064d491ddbce4aa2e81f9a1ce (patch) | |
| tree | f59c4f4225009f90f05450595465ecfeb44944d9 /tcg | |
| parent | 7dae901d2d0476945a2dc353bb685501fd365868 (diff) | |
| download | qemu-f9a716325facc32064d491ddbce4aa2e81f9a1ce.tar.gz qemu-f9a716325facc32064d491ddbce4aa2e81f9a1ce.tar.bz2 qemu-f9a716325facc32064d491ddbce4aa2e81f9a1ce.zip | |
tcg-mips: Split large ldst offsets
Use this to reduce goto_tb by one insn.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/mips/tcg-target.c | 23 |
1 files 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); |