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[Stable-8.2.3 67/87] target/riscv/vector_helper.c: optimize loops in lds
From: |
Michael Tokarev |
Subject: |
[Stable-8.2.3 67/87] target/riscv/vector_helper.c: optimize loops in ldst helpers |
Date: |
Wed, 10 Apr 2024 10:22:40 +0300 |
From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Change the for loops in ldst helpers to do a single increment in the
counter, and assign it env->vstart, to avoid re-reading from vstart
every time.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240314175704.478276-11-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
(cherry picked from commit 0a11629c915f61df798919db51a18ffe4649cb65)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index 4494313abe..3575912b83 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -198,7 +198,7 @@ vext_ldst_stride(void *vd, void *v0, target_ulong base,
VSTART_CHECK_EARLY_EXIT(env);
- for (i = env->vstart; i < env->vl; i++, env->vstart++) {
+ for (i = env->vstart; i < env->vl; env->vstart = ++i) {
k = 0;
while (k < nf) {
if (!vm && !vext_elem_mask(v0, i)) {
@@ -266,7 +266,7 @@ vext_ldst_us(void *vd, target_ulong base, CPURISCVState
*env, uint32_t desc,
VSTART_CHECK_EARLY_EXIT(env);
/* load bytes from guest memory */
- for (i = env->vstart; i < evl; i++, env->vstart++) {
+ for (i = env->vstart; i < evl; env->vstart = ++i) {
k = 0;
while (k < nf) {
target_ulong addr = base + ((i * nf + k) << log2_esz);
@@ -382,7 +382,7 @@ vext_ldst_index(void *vd, void *v0, target_ulong base,
VSTART_CHECK_EARLY_EXIT(env);
/* load bytes from guest memory */
- for (i = env->vstart; i < env->vl; i++, env->vstart++) {
+ for (i = env->vstart; i < env->vl; env->vstart = ++i) {
k = 0;
while (k < nf) {
if (!vm && !vext_elem_mask(v0, i)) {
--
2.39.2
- [Stable-8.2.3 57/87] block-backend: fix edge case in bdrv_next_cleanup() where BDS associated to BB changes, (continued)
- [Stable-8.2.3 57/87] block-backend: fix edge case in bdrv_next_cleanup() where BDS associated to BB changes, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 60/87] hw/scsi/scsi-generic: Fix io_timeout property not applying, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 59/87] target/i386/tcg: Enable page walking from MMIO memory, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 58/87] iotests: add test for stream job with an unaligned prefetch read, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 61/87] monitor/hmp-cmds-target: Append a space in error message in gpa2hva(), Michael Tokarev, 2024/04/10
- [Stable-8.2.3 62/87] target/riscv/vector_helper.c: set vstart = 0 in GEN_VEXT_VSLIDEUP_VX(), Michael Tokarev, 2024/04/10
- [Stable-8.2.3 63/87] trans_rvv.c.inc: set vstart = 0 in int scalar move insns, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 64/87] target/riscv/vector_helper.c: fix 'vmvr_v' memcpy endianess, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 65/87] target/riscv: always clear vstart in whole vec move insns, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 66/87] target/riscv/vector_helpers: do early exit when vstart >= vl, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 67/87] target/riscv/vector_helper.c: optimize loops in ldst helpers,
Michael Tokarev <=
- [Stable-8.2.3 68/87] hw/intc: Update APLIC IDC after claiming iforce register, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 69/87] target/riscv: rvv: Remove the dependency of Zvfbfmin to Zfbfmin, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 70/87] target/riscv: Fix mode in riscv_tlb_fill, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 71/87] target/riscv/kvm: fix timebase-frequency when using KVM acceleration, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 72/87] virtio-net: Fix vhost virtqueue notifiers for RSS, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 73/87] hw/net/net_tx_pkt: Fix virtio header without checksum offloading, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 74/87] tcg/optimize: Fix sign_mask for logical right-shift, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 78/87] hw/intc/arm_gicv3: ICC_HPPIR* return SPURIOUS if int group is disabled, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 75/87] target/hppa: Clear psw_n for BE on use_nullify_skip path, Michael Tokarev, 2024/04/10
- [Stable-8.2.3 77/87] gitlab-ci/cirrus: switch from 'master' to 'latest', Michael Tokarev, 2024/04/10