[v4] target/riscv: Generate strided vector ld/st with tcg

[PATCH v4 0/2] target/riscv: Generate strided vector ld/st with tcg

Chao Liu posted 2 patches 3 months ago

Diff against v5
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/cover.1755333616.git.chao.liu@yeah.net

Maintainers: Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Weiwei Li <liwei1518@gmail.com>, Daniel Henrique Barboza <dbarboza@ventanamicro.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>

There is a newer version of this series

target/riscv/insn_trans/trans_rvv.c.inc   | 319 ++++++++++++++++++----
tests/tcg/riscv64/Makefile.softmmu-target |   8 +-
tests/tcg/riscv64/test-vlsseg8e32.S       | 107 ++++++++
3 files changed, 382 insertions(+), 52 deletions(-)
create mode 100644 tests/tcg/riscv64/test-vlsseg8e32.S

Expand all Fold all

[PATCH v4 0/2] target/riscv: Generate strided vector ld/st with tcg

Posted by Chao Liu 3 months ago

Hi all,

Thanks Richard for the review.

For patch v4, the main modification is to improve the implementation of the
get_log2() function.

+static inline uint32_t get_log2(uint32_t a)
+{
-    uint32_t i = 0;
-    if (a == 0) {
-        return i;
-    }
-    for (; a > 1;) {
-        a >>= 1;
-        i++;
-    } 
+    assert(is_power_of_2(a));
+    return ctz32(a);
+}

patch v3 changes:
- Fix the get_log2() function:
  https://lore.kernel.org/qemu-riscv/cover.1755287531.git.chao.liu@yeah.net/T/#t
- Add test for vlsseg8e32 instruction.
- Rebase on top of the latest master.

patch v2 changes:
- Split the TCG node emulation of the complex strided load/store operation into
  two separate functions to simplify the implementation:
  https://lore.kernel.org/qemu-riscv/20250312155547.289642-1-paolo.savini@embecosm.com/


Best regards,

Chao

Chao Liu (2):
  Generate strided vector loads/stores with tcg nodes.
  tests/tcg/riscv64: Add test for vlsseg8e32 instruction

 target/riscv/insn_trans/trans_rvv.c.inc   | 319 ++++++++++++++++++----
 tests/tcg/riscv64/Makefile.softmmu-target |   8 +-
 tests/tcg/riscv64/test-vlsseg8e32.S       | 107 ++++++++
 3 files changed, 382 insertions(+), 52 deletions(-)
 create mode 100644 tests/tcg/riscv64/test-vlsseg8e32.S

-- 
2.50.1