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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-arm@nongnu.org,
qemu-devel@nongnu.org
Subject: [PATCH v2 25/69] target/arm: Implement FPCR.AH semantics for vector
FMIN/FMAX
Date: Sat, 1 Feb 2025 16:39:28 +0000
Message-Id: <20250201164012.1660228-26-peter.maydell@linaro.org>
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Implement the FPCR.AH =3D=3D 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)
=20
+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);
}
=20
+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] =3D {
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] =3D {
+ 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)
=20
static gen_helper_gvec_3_ptr * const f_vector_fmin[3] =3D {
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] =3D {
+ 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)
=20
static gen_helper_gvec_3_ptr * const f_vector_fmaxnm[3] =3D {
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)
=20
+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
=20
--=20
2.34.1