From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>, qemu-arm@nongnu.org
Subject: [PATCH v4 23/30] target/arm: Enforce alignment for VLDn/VSTn (single)
Date: Fri, 16 Apr 2021 11:59:52 -0700 [thread overview]
Message-ID: <20210416185959.1520974-24-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210416185959.1520974-1-richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/translate-neon.c.inc | 48 ++++++++++++++++++++++++++++-----
1 file changed, 42 insertions(+), 6 deletions(-)
diff --git a/target/arm/translate-neon.c.inc b/target/arm/translate-neon.c.inc
index e706c37c80..a02b8369a1 100644
--- a/target/arm/translate-neon.c.inc
+++ b/target/arm/translate-neon.c.inc
@@ -629,6 +629,7 @@ static bool trans_VLDST_single(DisasContext *s, arg_VLDST_single *a)
int nregs = a->n + 1;
int vd = a->vd;
TCGv_i32 addr, tmp;
+ MemOp mop;
if (!arm_dc_feature(s, ARM_FEATURE_NEON)) {
return false;
@@ -678,23 +679,58 @@ static bool trans_VLDST_single(DisasContext *s, arg_VLDST_single *a)
return true;
}
+ /* Pick up SCTLR settings */
+ mop = finalize_memop(s, a->size);
+
+ if (a->align) {
+ MemOp align_op;
+
+ switch (nregs) {
+ case 1:
+ /* For VLD1, use natural alignment. */
+ align_op = MO_ALIGN;
+ break;
+ case 2:
+ /* For VLD2, use double alignment. */
+ align_op = pow2_align(a->size + 1);
+ break;
+ case 4:
+ if (a->size == MO_32) {
+ /*
+ * For VLD4.32, align = 1 is double alignment, align = 2 is
+ * quad alignment; align = 3 is rejected above.
+ */
+ align_op = pow2_align(a->size + a->align);
+ } else {
+ /* For VLD4.8 and VLD.16, we want quad alignment. */
+ align_op = pow2_align(a->size + 2);
+ }
+ break;
+ default:
+ /* For VLD3, the alignment field is zero and rejected above. */
+ g_assert_not_reached();
+ }
+
+ mop = (mop & ~MO_AMASK) | align_op;
+ }
+
tmp = tcg_temp_new_i32();
addr = tcg_temp_new_i32();
load_reg_var(s, addr, a->rn);
- /*
- * TODO: if we implemented alignment exceptions, we should check
- * addr against the alignment encoded in a->align here.
- */
+
for (reg = 0; reg < nregs; reg++) {
if (a->l) {
- gen_aa32_ld_i32(s, tmp, addr, get_mem_index(s), a->size);
+ gen_aa32_ld_internal_i32(s, tmp, addr, get_mem_index(s), mop);
neon_store_element(vd, a->reg_idx, a->size, tmp);
} else { /* Store */
neon_load_element(tmp, vd, a->reg_idx, a->size);
- gen_aa32_st_i32(s, tmp, addr, get_mem_index(s), a->size);
+ gen_aa32_st_internal_i32(s, tmp, addr, get_mem_index(s), mop);
}
vd += a->stride;
tcg_gen_addi_i32(addr, addr, 1 << a->size);
+
+ /* Subsequent memory operations inherit alignment */
+ mop &= ~MO_AMASK;
}
tcg_temp_free_i32(addr);
tcg_temp_free_i32(tmp);
--
2.25.1
next prev parent reply other threads:[~2021-04-16 19:19 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 18:59 [PATCH v4 for-6.1 00/39] target/arm: enforce alignment Richard Henderson
2021-04-16 18:59 ` [PATCH v4 01/30] target/arm: Fix decode of align in VLDST_single Richard Henderson
2021-04-16 18:59 ` [PATCH v4 02/30] target/arm: Rename TBFLAG_A32, SCTLR_B Richard Henderson
2021-04-19 17:03 ` Peter Maydell
2021-04-19 18:19 ` Richard Henderson
2021-04-16 18:59 ` [PATCH v4 03/30] target/arm: Rename TBFLAG_ANY, PSTATE_SS Richard Henderson
2021-04-19 17:04 ` Peter Maydell
2021-04-16 18:59 ` [PATCH v4 04/30] target/arm: Add wrapper macros for accessing tbflags Richard Henderson
2021-04-19 17:04 ` Peter Maydell
2021-04-16 18:59 ` [PATCH v4 05/30] target/arm: Introduce CPUARMTBFlags Richard Henderson
2021-04-19 17:06 ` Peter Maydell
2021-04-16 18:59 ` [PATCH v4 06/30] target/arm: Move mode specific TB flags to tb->cs_base Richard Henderson
2021-04-19 17:08 ` Peter Maydell
2021-04-19 18:24 ` Richard Henderson
2021-04-16 18:59 ` [PATCH v4 07/30] target/arm: Move TBFLAG_AM32 bits to the top Richard Henderson
2021-04-19 17:07 ` Peter Maydell
2021-04-16 18:59 ` [PATCH v4 08/30] target/arm: Move TBFLAG_ANY bits to the bottom Richard Henderson
2021-04-19 17:04 ` Peter Maydell
2021-04-16 18:59 ` [PATCH v4 09/30] target/arm: Add ALIGN_MEM to TBFLAG_ANY Richard Henderson
2021-04-19 17:07 ` Peter Maydell
2021-04-16 18:59 ` [PATCH v4 10/30] target/arm: Adjust gen_aa32_{ld, st}_i32 for align+endianness Richard Henderson
2021-04-16 18:59 ` [PATCH v4 11/30] target/arm: Merge gen_aa32_frob64 into gen_aa32_ld_i64 Richard Henderson
2021-04-16 18:59 ` [PATCH v4 12/30] target/arm: Fix SCTLR_B test for TCGv_i64 load/store Richard Henderson
2021-04-16 18:59 ` [PATCH v4 13/30] target/arm: Adjust gen_aa32_{ld, st}_i64 for align+endianness Richard Henderson
2021-04-16 18:59 ` [PATCH v4 14/30] target/arm: Enforce word alignment for LDRD/STRD Richard Henderson
2021-04-16 18:59 ` [PATCH v4 15/30] target/arm: Enforce alignment for LDA/LDAH/STL/STLH Richard Henderson
2021-04-16 18:59 ` [PATCH v4 16/30] target/arm: Enforce alignment for LDM/STM Richard Henderson
2021-04-16 18:59 ` [PATCH v4 17/30] target/arm: Enforce alignment for RFE Richard Henderson
2021-04-16 18:59 ` [PATCH v4 18/30] target/arm: Enforce alignment for SRS Richard Henderson
2021-04-16 18:59 ` [PATCH v4 19/30] target/arm: Enforce alignment for VLDM/VSTM Richard Henderson
2021-04-16 18:59 ` [PATCH v4 20/30] target/arm: Enforce alignment for VLDR/VSTR Richard Henderson
2021-04-16 18:59 ` [PATCH v4 21/30] target/arm: Enforce alignment for VLDn (all lanes) Richard Henderson
2021-04-19 17:09 ` Peter Maydell
2021-04-16 18:59 ` [PATCH v4 22/30] target/arm: Enforce alignment for VLDn/VSTn (multiple) Richard Henderson
2021-04-16 18:59 ` Richard Henderson [this message]
2021-04-16 18:59 ` [PATCH v4 24/30] target/arm: Use finalize_memop for aa64 gpr load/store Richard Henderson
2021-04-16 18:59 ` [PATCH v4 25/30] target/arm: Use finalize_memop for aa64 fpr load/store Richard Henderson
2021-04-16 18:59 ` [PATCH v4 26/30] target/arm: Enforce alignment for aa64 load-acq/store-rel Richard Henderson
2021-04-16 18:59 ` [PATCH v4 27/30] target/arm: Use MemOp for size + endian in aa64 vector ld/st Richard Henderson
2021-04-16 18:59 ` [PATCH v4 28/30] target/arm: Enforce alignment for aa64 vector LDn/STn (multiple) Richard Henderson
2021-04-16 18:59 ` [PATCH v4 29/30] target/arm: Enforce alignment for aa64 vector LDn/STn (single) Richard Henderson
2021-04-16 18:59 ` [PATCH v4 30/30] target/arm: Enforce alignment for sve LD1R Richard Henderson
2021-04-16 19:17 ` [PATCH v4 for-6.1 00/39] target/arm: enforce alignment Peter Maydell
2021-04-16 19:23 ` Richard Henderson
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=20210416185959.1520974-24-richard.henderson@linaro.org \
--to=richard.henderson@linaro.org \
--cc=peter.maydell@linaro.org \
--cc=qemu-arm@nongnu.org \
--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).