[PULL 13/39] target/arm: Update find_last_active for PREDDESC

[Peter Maydell]

From: Richard Henderson <richard.hender...@linaro.org>

Since b64ee454a4a0, all predicate operations should be
using these field macros for predicates.

Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
Message-id: 20210309155305.11301-5-richard.hender...@linaro.org
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
 target/arm/sve_helper.c    | 6 +++---
 target/arm/translate-sve.c | 7 +++----
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 981895a17c6..224c767944c 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -2237,10 +2237,10 @@ void HELPER(sve_compact_d)(void *vd, void *vn, void 
*vg, uint32_t desc)
  */
 int32_t HELPER(sve_last_active_element)(void *vg, uint32_t pred_desc)
 {
-    intptr_t oprsz = extract32(pred_desc, 0, SIMD_OPRSZ_BITS) + 2;
-    intptr_t esz = extract32(pred_desc, SIMD_DATA_SHIFT, 2);
+    intptr_t words = DIV_ROUND_UP(FIELD_EX32(pred_desc, PREDDESC, OPRSZ), 8);
+    intptr_t esz = FIELD_EX32(pred_desc, PREDDESC, ESZ);
 
-    return last_active_element(vg, DIV_ROUND_UP(oprsz, 8), esz);
+    return last_active_element(vg, words, esz);
 }
 
 void HELPER(sve_splice)(void *vd, void *vn, void *vm, void *vg, uint32_t desc)
diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 27402af23c0..cac8082156a 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -2302,11 +2302,10 @@ static void find_last_active(DisasContext *s, TCGv_i32 
ret, int esz, int pg)
      */
     TCGv_ptr t_p = tcg_temp_new_ptr();
     TCGv_i32 t_desc;
-    unsigned vsz = pred_full_reg_size(s);
-    unsigned desc;
+    unsigned desc = 0;
 
-    desc = vsz - 2;
-    desc = deposit32(desc, SIMD_DATA_SHIFT, 2, esz);
+    desc = FIELD_DP32(desc, PREDDESC, OPRSZ, pred_full_reg_size(s));
+    desc = FIELD_DP32(desc, PREDDESC, ESZ, esz);
 
     tcg_gen_addi_ptr(t_p, cpu_env, pred_full_reg_offset(s, pg));
     t_desc = tcg_const_i32(desc);
-- 
2.20.1