[PATCH v2 25/69] target/arm: Implement FPCR.AH semantics for vector FMIN/FMAX

[Peter Maydell]

Implement the FPCR.AH == 1 semantics for vector FMIN/FMAX, by
creating new _ah_ versions of the gvec helpers which invoke the
scalar fmin_ah and fmax_ah helpers on each element.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/tcg/helper-sve.h    | 14 ++++++++++++++
 target/arm/tcg/translate-a64.c | 21 +++++++++++++++++++--
 target/arm/tcg/vec_helper.c    |  8 ++++++++
 3 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/target/arm/tcg/helper-sve.h b/target/arm/tcg/helper-sve.h
index fea43b319c3..f1b4606f763 100644
--- a/target/arm/tcg/helper-sve.h
+++ b/target/arm/tcg/helper-sve.h
@@ -972,6 +972,20 @@ DEF_HELPER_FLAGS_5(gvec_rsqrts_s, TCG_CALL_NO_RWG,
 DEF_HELPER_FLAGS_5(gvec_rsqrts_d, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, fpst, i32)
 
+DEF_HELPER_FLAGS_5(gvec_ah_fmax_h, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_5(gvec_ah_fmax_s, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_5(gvec_ah_fmax_d, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, fpst, i32)
+
+DEF_HELPER_FLAGS_5(gvec_ah_fmin_h, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_5(gvec_ah_fmin_s, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_5(gvec_ah_fmin_d, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, fpst, i32)
+
 DEF_HELPER_FLAGS_4(sve_faddv_h, TCG_CALL_NO_RWG,
                    i64, ptr, ptr, fpst, i32)
 DEF_HELPER_FLAGS_4(sve_faddv_s, TCG_CALL_NO_RWG,
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index ae3f3d32f45..cad9883f7dc 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -5607,6 +5607,13 @@ static bool do_fp3_vector(DisasContext *s, arg_qrrr_e 
*a, int data,
                                        FPST_A64_F16 : FPST_A64);
 }
 
+static bool do_fp3_vector_2fn(DisasContext *s, arg_qrrr_e *a, int data,
+                              gen_helper_gvec_3_ptr * const fnormal[3],
+                              gen_helper_gvec_3_ptr * const fah[3])
+{
+    return do_fp3_vector(s, a, data, s->fpcr_ah ? fah : fnormal);
+}
+
 static bool do_fp3_vector_ah(DisasContext *s, arg_qrrr_e *a, int data,
                              gen_helper_gvec_3_ptr * const f[3])
 {
@@ -5647,14 +5654,24 @@ static gen_helper_gvec_3_ptr * const f_vector_fmax[3] = 
{
     gen_helper_gvec_fmax_s,
     gen_helper_gvec_fmax_d,
 };
-TRANS(FMAX_v, do_fp3_vector, a, 0, f_vector_fmax)
+static gen_helper_gvec_3_ptr * const f_vector_fmax_ah[3] = {
+    gen_helper_gvec_ah_fmax_h,
+    gen_helper_gvec_ah_fmax_s,
+    gen_helper_gvec_ah_fmax_d,
+};
+TRANS(FMAX_v, do_fp3_vector_2fn, a, 0, f_vector_fmax, f_vector_fmax_ah)
 
 static gen_helper_gvec_3_ptr * const f_vector_fmin[3] = {
     gen_helper_gvec_fmin_h,
     gen_helper_gvec_fmin_s,
     gen_helper_gvec_fmin_d,
 };
-TRANS(FMIN_v, do_fp3_vector, a, 0, f_vector_fmin)
+static gen_helper_gvec_3_ptr * const f_vector_fmin_ah[3] = {
+    gen_helper_gvec_ah_fmin_h,
+    gen_helper_gvec_ah_fmin_s,
+    gen_helper_gvec_ah_fmin_d,
+};
+TRANS(FMIN_v, do_fp3_vector_2fn, a, 0, f_vector_fmin, f_vector_fmin_ah)
 
 static gen_helper_gvec_3_ptr * const f_vector_fmaxnm[3] = {
     gen_helper_gvec_fmaxnum_h,
diff --git a/target/arm/tcg/vec_helper.c b/target/arm/tcg/vec_helper.c
index 7330b373c38..9f77aa6b919 100644
--- a/target/arm/tcg/vec_helper.c
+++ b/target/arm/tcg/vec_helper.c
@@ -1448,6 +1448,14 @@ DO_3OP(gvec_rsqrts_h, helper_rsqrtsf_f16, float16)
 DO_3OP(gvec_rsqrts_s, helper_rsqrtsf_f32, float32)
 DO_3OP(gvec_rsqrts_d, helper_rsqrtsf_f64, float64)
 
+DO_3OP(gvec_ah_fmax_h, helper_vfp_ah_maxh, float16)
+DO_3OP(gvec_ah_fmax_s, helper_vfp_ah_maxs, float32)
+DO_3OP(gvec_ah_fmax_d, helper_vfp_ah_maxd, float64)
+
+DO_3OP(gvec_ah_fmin_h, helper_vfp_ah_minh, float16)
+DO_3OP(gvec_ah_fmin_s, helper_vfp_ah_mins, float32)
+DO_3OP(gvec_ah_fmin_d, helper_vfp_ah_mind, float64)
+
 #endif
 #undef DO_3OP
 
-- 
2.34.1