Signed-off-by: Stephen Long <stepl...@quicinc.com>
---
Right now, there is no log2 function for half precision floats, so I'm
not sure how to proceed. Currently, I just added a TODO comment.
target/arm/helper-sve.h | 3 +++
target/arm/sve.decode | 4 ++++
target/arm/sve_helper.c | 3 +++
target/arm/translate-sve.c | 17 +++++++++++++++++
4 files changed, 27 insertions(+)
diff --git a/target/arm/helper-sve.h b/target/arm/helper-sve.h
index 0a62eef94e..aaa5fc33f9 100644
--- a/target/arm/helper-sve.h
+++ b/target/arm/helper-sve.h
@@ -2731,3 +2731,6 @@ DEF_HELPER_FLAGS_5(sve2_sqrdcmlah_idx_h, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_5(sve2_sqrdcmlah_idx_s, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_5(flogb_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(flogb_d, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index 3cf824bac5..dcb095bb5d 100644
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -1568,3 +1568,7 @@ SM4E 01000101 00 10001 1 11100 0 ..... .....
@rdn_rm_e0
# SVE2 crypto constructive binary operations
SM4EKEY 01000101 00 1 ..... 11110 0 ..... ..... @rd_rn_rm_e0
RAX1 01000101 00 1 ..... 11110 1 ..... ..... @rd_rn_rm_e0
+
+### SVE2 floating-point convert to integer
+
+FLOGB 01100101 00 011 esz:2 0101 pg:3 rn:5 rd:5 &rpr_esz
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index aa94df302a..aba9c064fb 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -4624,6 +4624,9 @@ DO_ZPZ_FP(sve_ucvt_dh, uint64_t, , uint64_to_float16)
DO_ZPZ_FP(sve_ucvt_ds, uint64_t, , uint64_to_float32)
DO_ZPZ_FP(sve_ucvt_dd, uint64_t, , uint64_to_float64)
+DO_ZPZ_FP(flogb_s, float32, H1_4, float32_log2)
+DO_ZPZ_FP(flogb_d, float64, , float64_log2)
+
#undef DO_ZPZ_FP
static void do_fmla_zpzzz_h(void *vd, void *vn, void *vm, void *va, void *vg,
diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index a8e57ea5f4..9176b18bc9 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -8253,3 +8253,20 @@ static bool trans_RAX1(DisasContext *s, arg_rrr_esz *a)
}
return true;
}
+
+static bool trans_FLOGB(DisasContext *s, arg_rpr_esz *a)
+{
+ /* TODO: There is no support for log base 2 for half-precision floats */
+ static gen_helper_gvec_3_ptr * const fns[] = {
+ NULL,
+ gen_helper_flogb_s,
+ gen_helper_flogb_d,
+ };
+ if (a->esz == 0 || !dc_isar_feature(aa64_sve2, s)) {
+ return false;
+ }
+ if (sve_access_check(s)) {
+ do_ppz_fp(s, a, fns[a->esz - 1]);
+ }
+ return true;
+}
--
2.17.1
