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tcg/optimize: Split out fold_bswap 

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-08-24 11:58:12 -07:00
parent 30dd0bfeb5
commit 09bacdc263
1 changed files with 16 additions and 11 deletions
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27
tcg/optimize.c
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@ -841,6 +841,17 @@ static bool fold_brcond2(OptContext *ctx, TCGOp *op)
return false; return false;
} }
static bool fold_bswap(OptContext *ctx, TCGOp *op)
{
if (arg_is_const(op->args[1])) {
uint64_t t = arg_info(op->args[1])->val;
t = do_constant_folding(op->opc, t, op->args[2]);
return tcg_opt_gen_movi(ctx, op, op->args[0], t);
}
return false;
}
static bool fold_call(OptContext *ctx, TCGOp *op) static bool fold_call(OptContext *ctx, TCGOp *op)
{ {
TCGContext *s = ctx->tcg; TCGContext *s = ctx->tcg;
@ -1742,17 +1753,6 @@ void tcg_optimize(TCGContext *s)
} }
break; break;
CASE_OP_32_64(bswap16):
CASE_OP_32_64(bswap32):
case INDEX_op_bswap64_i64:
if (arg_is_const(op->args[1])) {
tmp = do_constant_folding(opc, arg_info(op->args[1])->val,
op->args[2]);
tcg_opt_gen_movi(&ctx, op, op->args[0], tmp);
continue;
}
break;
default: default:
break; break;
@ -1777,6 +1777,11 @@ void tcg_optimize(TCGContext *s)
case INDEX_op_brcond2_i32: case INDEX_op_brcond2_i32:
done = fold_brcond2(&ctx, op); done = fold_brcond2(&ctx, op);
break; break;
CASE_OP_32_64(bswap16):
CASE_OP_32_64(bswap32):
case INDEX_op_bswap64_i64:
done = fold_bswap(&ctx, op);
break;
CASE_OP_32_64(clz): CASE_OP_32_64(clz):
CASE_OP_32_64(ctz): CASE_OP_32_64(ctz):
done = fold_count_zeros(&ctx, op); done = fold_count_zeros(&ctx, op);