tcg/s390x: Avoid the constant pool in tcg_out_movi
Load constants in no more than two insns, which turns out to be faster than using the constant pool. Suggested-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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@ -877,6 +877,9 @@ static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg dst, TCGReg src)
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static const S390Opcode li_insns[4] = {
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RI_LLILL, RI_LLILH, RI_LLIHL, RI_LLIHH
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};
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static const S390Opcode oi_insns[4] = {
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RI_OILL, RI_OILH, RI_OIHL, RI_OIHH
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};
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static const S390Opcode lif_insns[2] = {
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RIL_LLILF, RIL_LLIHF,
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};
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@ -928,9 +931,20 @@ static void tcg_out_movi(TCGContext *s, TCGType type,
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return;
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}
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/* Otherwise, stuff it in the constant pool. */
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tcg_out_insn(s, RIL, LGRL, ret, 0);
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new_pool_label(s, sval, R_390_PC32DBL, s->code_ptr - 2, 2);
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/* Otherwise, load it by parts. */
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i = is_const_p16((uint32_t)uval);
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if (i >= 0) {
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tcg_out_insn_RI(s, li_insns[i], ret, uval >> (i * 16));
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} else {
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tcg_out_insn(s, RIL, LLILF, ret, uval);
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}
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uval >>= 32;
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i = is_const_p16(uval);
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if (i >= 0) {
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tcg_out_insn_RI(s, oi_insns[i + 2], ret, uval >> (i * 16));
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} else {
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tcg_out_insn(s, RIL, OIHF, ret, uval);
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}
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}
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/* Emit a load/store type instruction. Inputs are:
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@ -1160,9 +1174,6 @@ static void tgen_andi(TCGContext *s, TCGType type, TCGReg dest, uint64_t val)
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static void tgen_ori(TCGContext *s, TCGReg dest, uint64_t val)
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{
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static const S390Opcode oi_insns[4] = {
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RI_OILL, RI_OILH, RI_OIHL, RI_OIHH
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};
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static const S390Opcode oif_insns[2] = {
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RIL_OILF, RIL_OIHF
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};
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