3 files changed, 7 insertions, 20 deletions

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index e1a66a2d1c..47d24a5375 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -185,12 +185,9 @@ typedef struct {
 #ifdef TARGET_AARCH64
 # define ARM_MAX_VQ    16
 void arm_cpu_sve_finalize(ARMCPU *cpu, Error **errp);
-uint32_t arm_cpu_vq_map_next_smaller(ARMCPU *cpu, uint32_t vq);
 #else
 # define ARM_MAX_VQ    1
 static inline void arm_cpu_sve_finalize(ARMCPU *cpu, Error **errp) { }
-static inline uint32_t arm_cpu_vq_map_next_smaller(ARMCPU *cpu, uint32_t vq)
-{ return 0; }
 #endif
 
 typedef struct ARMVectorReg {
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 68baf0482f..a39d6fcea3 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -458,21 +458,6 @@ void arm_cpu_sve_finalize(ARMCPU *cpu, Error **errp)
     cpu->sve_max_vq = max_vq;
 }
 
-uint32_t arm_cpu_vq_map_next_smaller(ARMCPU *cpu, uint32_t vq)
-{
-    uint32_t bitnum;
-
-    /*
-     * We allow vq == ARM_MAX_VQ + 1 to be input because the caller may want
-     * to find the maximum vq enabled, which may be ARM_MAX_VQ, but this
-     * function always returns the next smaller than the input.
-     */
-    assert(vq && vq <= ARM_MAX_VQ + 1);
-
-    bitnum = find_last_bit(cpu->sve_vq_map, vq - 1);
-    return bitnum == vq - 1 ? 0 : bitnum + 1;
-}
-
 static void cpu_max_get_sve_max_vq(Object *obj, Visitor *v, const char *name,
                                    void *opaque, Error **errp)
 {
diff --git a/target/arm/helper.c b/target/arm/helper.c
index be67e2c66d..a089fb5a69 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -5363,9 +5363,14 @@ int sve_exception_el(CPUARMState *env, int el)
 
 static uint32_t sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len)
 {
-    uint32_t start_vq = (start_len & 0xf) + 1;
+    uint32_t end_len;
 
-    return arm_cpu_vq_map_next_smaller(cpu, start_vq + 1) - 1;
+    end_len = start_len &= 0xf;
+    if (!test_bit(start_len, cpu->sve_vq_map)) {
+        end_len = find_last_bit(cpu->sve_vq_map, start_len);
+        assert(end_len < start_len);
+    }
+    return end_len;
 }
 
 /*