ShuriZma
/
xemu
mirror of https://github.com/xemu-project/xemu.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Richard Henderson 2014-03-23 17:45:23 +00:00
parent 7dae901d2d
commit f9a716325f
1 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
tcg/mips/tcg-target.c
View File

@ -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,
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_AT, TCG_REG_ZERO,
(uintptr_t)(s->tb_next + args[0]));
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_AT, TCG_REG_AT, 0);
tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_AT, 0);
}
tcg_out_nop(s);