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[PULL,06/12] tcg: Add tcg_gen_gvec_rotrs

Message ID 20230502112023.776823-7-richard.henderson@linaro.org
State Accepted
Commit bef317d0c36d66cb44d14a0838d5abe7b26b0344
Headers show
Series [PULL,01/12] softmmu: Tidy dirtylimit_dirty_ring_full_time | expand

Commit Message

Richard Henderson May 2, 2023, 11:20 a.m. UTC 
From: Nazar Kazakov <nazar.kazakov@codethink.co.uk>

Add tcg expander and helper functions for rotate right
vector with scalar operand.

Signed-off-by: Nazar Kazakov <nazar.kazakov@codethink.co.uk>
Message-Id: <20230428144757.57530-10-lawrence.hunter@codethink.co.uk>
[rth: Split out of larger patch; mask rotation count.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/tcg/tcg-op-gvec.h |  2 ++
 tcg/tcg-op-gvec.c         | 11 +++++++++++
 2 files changed, 13 insertions(+)
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Patch

diff --git a/include/tcg/tcg-op-gvec.h b/include/tcg/tcg-op-gvec.h
index 6d58683171..a8183bfeab 100644
--- a/include/tcg/tcg-op-gvec.h
+++ b/include/tcg/tcg-op-gvec.h
@@ -371,6 +371,8 @@  void tcg_gen_gvec_sars(unsigned vece, uint32_t dofs, uint32_t aofs,
                        TCGv_i32 shift, uint32_t oprsz, uint32_t maxsz);
 void tcg_gen_gvec_rotls(unsigned vece, uint32_t dofs, uint32_t aofs,
                         TCGv_i32 shift, uint32_t oprsz, uint32_t maxsz);
+void tcg_gen_gvec_rotrs(unsigned vece, uint32_t dofs, uint32_t aofs,
+                        TCGv_i32 shift, uint32_t oprsz, uint32_t maxsz);
 
 /*
  * Perform vector shift by vector element, modulo the element size.
diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c
index 9c14908a46..f51bcaa87b 100644
--- a/tcg/tcg-op-gvec.c
+++ b/tcg/tcg-op-gvec.c
@@ -3353,6 +3353,17 @@  void tcg_gen_gvec_rotls(unsigned vece, uint32_t dofs, uint32_t aofs,
     do_gvec_shifts(vece, dofs, aofs, shift, oprsz, maxsz, &g);
 }
 
+void tcg_gen_gvec_rotrs(unsigned vece, uint32_t dofs, uint32_t aofs,
+                        TCGv_i32 shift, uint32_t oprsz, uint32_t maxsz)
+{
+    TCGv_i32 tmp = tcg_temp_ebb_new_i32();
+
+    tcg_gen_neg_i32(tmp, shift);
+    tcg_gen_andi_i32(tmp, tmp, (8 << vece) - 1);
+    tcg_gen_gvec_rotls(vece, dofs, aofs, tmp, oprsz, maxsz);
+    tcg_temp_free_i32(tmp);
+}
+
 /*
  * Expand D = A << (B % element bits)
  *