Blame 0077-tcg-optimize-add-constant-folding-for-deposit.patch
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From 04edfbcf025b5588e0f3b86c74356a4339745f35 Mon Sep 17 00:00:00 2001
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From: Aurelien Jarno <aurelien@aurel32.net>
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Date: Fri, 21 Sep 2012 11:07:29 +0200
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Subject: [PATCH] tcg/optimize: add constant folding for deposit
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Reviewed-by: Richard Henderson <rth@twiddle.net>
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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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tcg/optimize.c | 20 ++++++++++++++++++++
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1 file changed, 20 insertions(+)
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diff --git a/tcg/optimize.c b/tcg/optimize.c
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index c8ae50b..35532a1 100644
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--- a/tcg/optimize.c
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+++ b/tcg/optimize.c
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@@ -668,6 +668,26 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
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}
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args += 3;
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break;
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+ CASE_OP_32_64(deposit):
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+ if (temps[args[1]].state == TCG_TEMP_CONST
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+ && temps[args[2]].state == TCG_TEMP_CONST) {
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+ gen_opc_buf[op_index] = op_to_movi(op);
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+ tmp = ((1ull << args[4]) - 1);
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+ tmp = (temps[args[1]].val & ~(tmp << args[3]))
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+ | ((temps[args[2]].val & tmp) << args[3]);
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+ tcg_opt_gen_movi(gen_args, args[0], tmp);
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+ gen_args += 2;
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+ } else {
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+ reset_temp(args[0]);
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+ gen_args[0] = args[0];
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+ gen_args[1] = args[1];
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+ gen_args[2] = args[2];
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+ gen_args[3] = args[3];
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+ gen_args[4] = args[4];
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+ gen_args += 5;
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+ }
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+ args += 5;
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+ break;
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CASE_OP_32_64(setcond):
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tmp = do_constant_folding_cond(op, args[1], args[2], args[3]);
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if (tmp != 2) {
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--
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1.7.12.1
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