From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: luis.pires@eldorado.org.br, alex.bennee@linaro.org
Subject: [PATCH v3 16/48] tcg/optimize: Split out fold_setcond2
Date: Thu, 21 Oct 2021 14:05:07 -0700 [thread overview]
Message-ID: <20211021210539.825582-17-richard.henderson@linaro.org> (raw)
In-Reply-To: <20211021210539.825582-1-richard.henderson@linaro.org>
Reduce some code duplication by folding the NE and EQ cases.
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/optimize.c | 145 ++++++++++++++++++++++++-------------------------
1 file changed, 72 insertions(+), 73 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index e66d935808..0eaa0127f3 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -839,6 +839,75 @@ static bool fold_qemu_st(OptContext *ctx, TCGOp *op)
return false;
}
+static bool fold_setcond2(OptContext *ctx, TCGOp *op)
+{
+ TCGCond cond = op->args[5];
+ int i = do_constant_folding_cond2(&op->args[1], &op->args[3], cond);
+ int inv = 0;
+
+ if (i >= 0) {
+ goto do_setcond_const;
+ }
+
+ switch (cond) {
+ case TCG_COND_LT:
+ case TCG_COND_GE:
+ /*
+ * Simplify LT/GE comparisons vs zero to a single compare
+ * vs the high word of the input.
+ */
+ if (arg_is_const(op->args[3]) && arg_info(op->args[3])->val == 0 &&
+ arg_is_const(op->args[4]) && arg_info(op->args[4])->val == 0) {
+ goto do_setcond_high;
+ }
+ break;
+
+ case TCG_COND_NE:
+ inv = 1;
+ QEMU_FALLTHROUGH;
+ case TCG_COND_EQ:
+ /*
+ * Simplify EQ/NE comparisons where one of the pairs
+ * can be simplified.
+ */
+ i = do_constant_folding_cond(INDEX_op_setcond_i32, op->args[1],
+ op->args[3], cond);
+ switch (i ^ inv) {
+ case 0:
+ goto do_setcond_const;
+ case 1:
+ goto do_setcond_high;
+ }
+
+ i = do_constant_folding_cond(INDEX_op_setcond_i32, op->args[2],
+ op->args[4], cond);
+ switch (i ^ inv) {
+ case 0:
+ goto do_setcond_const;
+ case 1:
+ op->args[2] = op->args[3];
+ op->args[3] = cond;
+ op->opc = INDEX_op_setcond_i32;
+ break;
+ }
+ break;
+
+ default:
+ break;
+
+ do_setcond_high:
+ op->args[1] = op->args[2];
+ op->args[2] = op->args[4];
+ op->args[3] = cond;
+ op->opc = INDEX_op_setcond_i32;
+ break;
+ }
+ return false;
+
+ do_setcond_const:
+ return tcg_opt_gen_movi(ctx, op, op->args[0], i);
+}
+
static bool fold_shift(OptContext *ctx, TCGOp *op)
{
return fold_const2(ctx, op);
@@ -1638,79 +1707,6 @@ void tcg_optimize(TCGContext *s)
}
break;
- case INDEX_op_setcond2_i32:
- i = do_constant_folding_cond2(&op->args[1], &op->args[3],
- op->args[5]);
- if (i >= 0) {
- do_setcond_const:
- tcg_opt_gen_movi(&ctx, op, op->args[0], i);
- continue;
- }
- if ((op->args[5] == TCG_COND_LT || op->args[5] == TCG_COND_GE)
- && arg_is_const(op->args[3])
- && arg_info(op->args[3])->val == 0
- && arg_is_const(op->args[4])
- && arg_info(op->args[4])->val == 0) {
- /* Simplify LT/GE comparisons vs zero to a single compare
- vs the high word of the input. */
- do_setcond_high:
- reset_temp(op->args[0]);
- arg_info(op->args[0])->z_mask = 1;
- op->opc = INDEX_op_setcond_i32;
- op->args[1] = op->args[2];
- op->args[2] = op->args[4];
- op->args[3] = op->args[5];
- break;
- }
- if (op->args[5] == TCG_COND_EQ) {
- /* Simplify EQ comparisons where one of the pairs
- can be simplified. */
- i = do_constant_folding_cond(INDEX_op_setcond_i32,
- op->args[1], op->args[3],
- TCG_COND_EQ);
- if (i == 0) {
- goto do_setcond_const;
- } else if (i > 0) {
- goto do_setcond_high;
- }
- i = do_constant_folding_cond(INDEX_op_setcond_i32,
- op->args[2], op->args[4],
- TCG_COND_EQ);
- if (i == 0) {
- goto do_setcond_high;
- } else if (i < 0) {
- break;
- }
- do_setcond_low:
- reset_temp(op->args[0]);
- arg_info(op->args[0])->z_mask = 1;
- op->opc = INDEX_op_setcond_i32;
- op->args[2] = op->args[3];
- op->args[3] = op->args[5];
- break;
- }
- if (op->args[5] == TCG_COND_NE) {
- /* Simplify NE comparisons where one of the pairs
- can be simplified. */
- i = do_constant_folding_cond(INDEX_op_setcond_i32,
- op->args[1], op->args[3],
- TCG_COND_NE);
- if (i == 0) {
- goto do_setcond_high;
- } else if (i > 0) {
- goto do_setcond_const;
- }
- i = do_constant_folding_cond(INDEX_op_setcond_i32,
- op->args[2], op->args[4],
- TCG_COND_NE);
- if (i == 0) {
- goto do_setcond_low;
- } else if (i > 0) {
- goto do_setcond_const;
- }
- }
- break;
-
default:
break;
@@ -1796,6 +1792,9 @@ void tcg_optimize(TCGContext *s)
CASE_OP_32_64(shr):
done = fold_shift(&ctx, op);
break;
+ case INDEX_op_setcond2_i32:
+ done = fold_setcond2(&ctx, op);
+ break;
CASE_OP_32_64_VEC(sub):
done = fold_sub(&ctx, op);
break;
--
2.25.1
next prev parent reply other threads:[~2021-10-21 21:22 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 21:04 [PATCH v3 00/48] tcg: optimize redundant sign extensions Richard Henderson
2021-10-21 21:04 ` [PATCH v3 01/48] tcg/optimize: Rename "mask" to "z_mask" Richard Henderson
2021-10-21 21:04 ` [PATCH v3 02/48] tcg/optimize: Split out OptContext Richard Henderson
2021-10-22 14:53 ` Philippe Mathieu-Daudé
2021-10-21 21:04 ` [PATCH v3 03/48] tcg/optimize: Remove do_default label Richard Henderson
2021-10-22 15:12 ` Philippe Mathieu-Daudé
2021-10-21 21:04 ` [PATCH v3 04/48] tcg/optimize: Change tcg_opt_gen_{mov, movi} interface Richard Henderson
2021-10-21 21:04 ` [PATCH v3 05/48] tcg/optimize: Move prev_mb into OptContext Richard Henderson
2021-10-22 15:13 ` Philippe Mathieu-Daudé
2021-10-21 21:04 ` [PATCH v3 06/48] tcg/optimize: Split out init_arguments Richard Henderson
2021-10-21 21:04 ` [PATCH v3 07/48] tcg/optimize: Split out copy_propagate Richard Henderson
2021-10-21 21:04 ` [PATCH v3 08/48] tcg/optimize: Split out fold_call Richard Henderson
2021-10-21 21:05 ` [PATCH v3 09/48] tcg/optimize: Drop nb_oargs, nb_iargs locals Richard Henderson
2021-10-21 21:05 ` [PATCH v3 10/48] tcg/optimize: Change fail return for do_constant_folding_cond* Richard Henderson
2021-10-22 13:53 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 11/48] tcg/optimize: Return true from tcg_opt_gen_{mov, movi} Richard Henderson
2021-10-26 15:13 ` [PATCH v3 11/48] tcg/optimize: Return true from tcg_opt_gen_{mov,movi} Alex Bennée
2021-10-21 21:05 ` [PATCH v3 12/48] tcg/optimize: Split out finish_folding Richard Henderson
2021-10-26 15:16 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 13/48] tcg/optimize: Use a boolean to avoid a mass of continues Richard Henderson
2021-10-26 15:17 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 14/48] tcg/optimize: Split out fold_mb, fold_qemu_{ld,st} Richard Henderson
2021-10-22 13:56 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 15/48] tcg/optimize: Split out fold_const{1,2} Richard Henderson
2021-10-26 15:19 ` Alex Bennée
2021-10-21 21:05 ` Richard Henderson [this message]
2021-10-26 15:31 ` [PATCH v3 16/48] tcg/optimize: Split out fold_setcond2 Alex Bennée
2021-10-21 21:05 ` [PATCH v3 17/48] tcg/optimize: Split out fold_brcond2 Richard Henderson
2021-10-22 17:26 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 18/48] tcg/optimize: Split out fold_brcond Richard Henderson
2021-10-22 13:58 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 19/48] tcg/optimize: Split out fold_setcond Richard Henderson
2021-10-22 13:59 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 20/48] tcg/optimize: Split out fold_mulu2_i32 Richard Henderson
2021-10-22 14:00 ` Philippe Mathieu-Daudé
2021-10-22 17:32 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 21/48] tcg/optimize: Split out fold_addsub2_i32 Richard Henderson
2021-10-22 14:01 ` Philippe Mathieu-Daudé
2021-10-22 17:33 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 22/48] tcg/optimize: Split out fold_movcond Richard Henderson
2021-10-22 14:05 ` Philippe Mathieu-Daudé
2021-10-22 17:34 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 23/48] tcg/optimize: Split out fold_extract2 Richard Henderson
2021-10-22 14:07 ` Philippe Mathieu-Daudé
2021-10-22 17:34 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 24/48] tcg/optimize: Split out fold_extract, fold_sextract Richard Henderson
2021-10-22 14:08 ` Philippe Mathieu-Daudé
2021-10-22 17:34 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 25/48] tcg/optimize: Split out fold_deposit Richard Henderson
2021-10-22 14:09 ` Philippe Mathieu-Daudé
2021-10-22 17:35 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 26/48] tcg/optimize: Split out fold_count_zeros Richard Henderson
2021-10-22 14:10 ` Philippe Mathieu-Daudé
2021-10-22 17:35 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 27/48] tcg/optimize: Split out fold_bswap Richard Henderson
2021-10-22 17:36 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 28/48] tcg/optimize: Split out fold_dup, fold_dup2 Richard Henderson
2021-10-22 14:12 ` Philippe Mathieu-Daudé
2021-10-22 17:36 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 29/48] tcg/optimize: Split out fold_mov Richard Henderson
2021-10-22 17:39 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 30/48] tcg/optimize: Split out fold_xx_to_i Richard Henderson
2021-10-22 21:04 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 31/48] tcg/optimize: Split out fold_xx_to_x Richard Henderson
2021-10-22 21:04 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 32/48] tcg/optimize: Split out fold_xi_to_i Richard Henderson
2021-10-22 21:17 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 33/48] tcg/optimize: Add type to OptContext Richard Henderson
2021-10-22 22:11 ` Luis Fernando Fujita Pires
2021-10-23 18:25 ` Richard Henderson
2021-10-21 21:05 ` [PATCH v3 34/48] tcg/optimize: Split out fold_to_not Richard Henderson
2021-10-25 14:17 ` Luis Fernando Fujita Pires
2021-10-25 17:31 ` Richard Henderson
2021-10-25 18:13 ` Luis Fernando Fujita Pires
2021-10-25 18:35 ` Richard Henderson
2021-10-21 21:05 ` [PATCH v3 35/48] tcg/optimize: Split out fold_sub_to_neg Richard Henderson
2021-10-25 14:17 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 36/48] tcg/optimize: Split out fold_xi_to_x Richard Henderson
2021-10-25 14:26 ` Luis Fernando Fujita Pires
2021-10-25 17:46 ` Richard Henderson
2021-10-21 21:05 ` [PATCH v3 37/48] tcg/optimize: Split out fold_ix_to_i Richard Henderson
2021-10-25 14:26 ` Luis Fernando Fujita Pires
2021-10-26 19:11 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 38/48] tcg/optimize: Split out fold_masks Richard Henderson
2021-10-26 15:32 ` Alex Bennée
2021-10-26 18:50 ` Richard Henderson
2021-10-21 21:05 ` [PATCH v3 39/48] tcg/optimize: Expand fold_mulu2_i32 to all 4-arg multiplies Richard Henderson
2021-10-22 14:16 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 40/48] tcg/optimize: Expand fold_addsub2_i32 to 64-bit ops Richard Henderson
2021-10-26 16:21 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 41/48] tcg/optimize: Sink commutative operand swapping into fold functions Richard Henderson
2021-10-26 16:27 ` Alex Bennée
2021-10-26 19:33 ` Richard Henderson
2021-10-27 13:22 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 42/48] tcg/optimize: Add more simplifications for orc Richard Henderson
2021-10-26 16:22 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 43/48] tcg/optimize: Stop forcing z_mask to "garbage" for 32-bit values Richard Henderson
2021-10-26 16:35 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 44/48] tcg/optimize: Optimize sign extensions Richard Henderson
2021-10-26 16:34 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 45/48] tcg/optimize: Propagate sign info for logical operations Richard Henderson
2021-10-26 16:35 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 46/48] tcg/optimize: Propagate sign info for setcond Richard Henderson
2021-10-26 16:36 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 47/48] tcg/optimize: Propagate sign info for bit counting Richard Henderson
2021-10-26 16:36 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 48/48] tcg/optimize: Propagate sign info for shifting Richard Henderson
2021-10-26 16:37 ` Alex Bennée
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211021210539.825582-17-richard.henderson@linaro.org \
--to=richard.henderson@linaro.org \
--cc=alex.bennee@linaro.org \
--cc=luis.pires@eldorado.org.br \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).