Commit 8b66eefe authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg-sparc: Use the RETURN instruction 



Saves one insn per TB exit over JMPL+RESTORE.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 34b1a49c

tcg/sparc/tcg-target.c

+10 −4
Original line number Diff line number Diff line
@@ -219,6 +219,7 @@ static const int tcg_target_call_oarg_regs[] = { 
#define RDY        (INSN_OP(2) | INSN_OP3(0x28) | INSN_RS1(0))

#define WRY        (INSN_OP(2) | INSN_OP3(0x30) | INSN_RD(0))

#define JMPL       (INSN_OP(2) | INSN_OP3(0x38))

#define RETURN     (INSN_OP(2) | INSN_OP3(0x39))

#define SAVE       (INSN_OP(2) | INSN_OP3(0x3c))

#define RESTORE    (INSN_OP(2) | INSN_OP3(0x3d))

#define SETHI      (INSN_OP(0) | INSN_OP2(0x4))
@@ -1142,10 +1143,15 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args, 


    switch (opc) {

    case INDEX_op_exit_tb:

        tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_I0, args[0]);

        tcg_out_arithi(s, TCG_REG_G0, TCG_REG_I7, 8, JMPL);

        tcg_out32(s, RESTORE | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_G0) |

                      INSN_RS2(TCG_REG_G0));

        if (check_fit_tl(args[0], 13)) {

            tcg_out_arithi(s, TCG_REG_G0, TCG_REG_I7, 8, RETURN);

            tcg_out_movi_imm13(s, TCG_REG_O0, args[0]);

        } else {

            tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_I0, args[0] & ~0x3ff);

            tcg_out_arithi(s, TCG_REG_G0, TCG_REG_I7, 8, RETURN);

            tcg_out_arithi(s, TCG_REG_O0, TCG_REG_O0,

                           args[0] & 0x3ff, ARITH_OR);

        }

        break;

    case INDEX_op_goto_tb:

        if (s->tb_jmp_offset) {