tcg-sparc: Use the RETURN instruction
Saves one insn per TB exit over JMPL+RESTORE. Signed-off-by: Richard Henderson <rth@twiddle.net>
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@ -219,6 +219,7 @@ static const int tcg_target_call_oarg_regs[] = {
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#define RDY (INSN_OP(2) | INSN_OP3(0x28) | INSN_RS1(0))
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#define WRY (INSN_OP(2) | INSN_OP3(0x30) | INSN_RD(0))
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#define JMPL (INSN_OP(2) | INSN_OP3(0x38))
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#define RETURN (INSN_OP(2) | INSN_OP3(0x39))
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#define SAVE (INSN_OP(2) | INSN_OP3(0x3c))
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#define RESTORE (INSN_OP(2) | INSN_OP3(0x3d))
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#define SETHI (INSN_OP(0) | INSN_OP2(0x4))
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@ -1142,10 +1143,15 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
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switch (opc) {
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case INDEX_op_exit_tb:
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tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_I0, args[0]);
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tcg_out_arithi(s, TCG_REG_G0, TCG_REG_I7, 8, JMPL);
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tcg_out32(s, RESTORE | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_G0) |
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INSN_RS2(TCG_REG_G0));
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if (check_fit_tl(args[0], 13)) {
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tcg_out_arithi(s, TCG_REG_G0, TCG_REG_I7, 8, RETURN);
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tcg_out_movi_imm13(s, TCG_REG_O0, args[0]);
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} else {
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tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_I0, args[0] & ~0x3ff);
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tcg_out_arithi(s, TCG_REG_G0, TCG_REG_I7, 8, RETURN);
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tcg_out_arithi(s, TCG_REG_O0, TCG_REG_O0,
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args[0] & 0x3ff, ARITH_OR);
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}
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break;
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case INDEX_op_goto_tb:
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if (s->tb_jmp_offset) {
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