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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-arm@nongnu.org,
qemu-devel@nongnu.org
Subject: [PATCH v2 27/69] target/arm: Implement FPCR.AH semantics for FMINP
and FMAXP
Date: Sat, 1 Feb 2025 16:39:30 +0000
Message-Id: <20250201164012.1660228-28-peter.maydell@linaro.org>
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Implement the FPCR.AH semantics for the pairwise floating
point minimum/maximum insns FMINP and FMAXP.
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 | 25 +++++++++++++++++++++----
target/arm/tcg/vec_helper.c | 10 ++++++++++
3 files changed, 45 insertions(+), 4 deletions(-)
diff --git a/target/arm/tcg/helper-sve.h b/target/arm/tcg/helper-sve.h
index f1b4606f763..8349752e99b 100644
--- a/target/arm/tcg/helper-sve.h
+++ b/target/arm/tcg/helper-sve.h
@@ -986,6 +986,20 @@ DEF_HELPER_FLAGS_5(gvec_ah_fmin_s, TCG_CALL_NO_RWG,
DEF_HELPER_FLAGS_5(gvec_ah_fmin_d, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, fpst, i32)
=20
+DEF_HELPER_FLAGS_5(gvec_ah_fmaxp_h, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_5(gvec_ah_fmaxp_s, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_5(gvec_ah_fmaxp_d, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, fpst, i32)
+
+DEF_HELPER_FLAGS_5(gvec_ah_fminp_h, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_5(gvec_ah_fminp_s, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, fpst, i32)
+DEF_HELPER_FLAGS_5(gvec_ah_fminp_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 80a6562ed51..7af727b606d 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -5776,14 +5776,24 @@ static gen_helper_gvec_3_ptr * const f_vector_fmaxp=
[3] =3D {
gen_helper_gvec_fmaxp_s,
gen_helper_gvec_fmaxp_d,
};
-TRANS(FMAXP_v, do_fp3_vector, a, 0, f_vector_fmaxp)
+static gen_helper_gvec_3_ptr * const f_vector_ah_fmaxp[3] =3D {
+ gen_helper_gvec_ah_fmaxp_h,
+ gen_helper_gvec_ah_fmaxp_s,
+ gen_helper_gvec_ah_fmaxp_d,
+};
+TRANS(FMAXP_v, do_fp3_vector_2fn, a, 0, f_vector_fmaxp, f_vector_ah_fmaxp)
=20
static gen_helper_gvec_3_ptr * const f_vector_fminp[3] =3D {
gen_helper_gvec_fminp_h,
gen_helper_gvec_fminp_s,
gen_helper_gvec_fminp_d,
};
-TRANS(FMINP_v, do_fp3_vector, a, 0, f_vector_fminp)
+static gen_helper_gvec_3_ptr * const f_vector_ah_fminp[3] =3D {
+ gen_helper_gvec_ah_fminp_h,
+ gen_helper_gvec_ah_fminp_s,
+ gen_helper_gvec_ah_fminp_d,
+};
+TRANS(FMINP_v, do_fp3_vector_2fn, a, 0, f_vector_fminp, f_vector_ah_fminp)
=20
static gen_helper_gvec_3_ptr * const f_vector_fmaxnmp[3] =3D {
gen_helper_gvec_fmaxnump_h,
@@ -6775,9 +6785,16 @@ static bool do_fp3_scalar_pair(DisasContext *s, arg_=
rr_e *a, const FPScalar *f)
return true;
}
=20
+static bool do_fp3_scalar_pair_2fn(DisasContext *s, arg_rr_e *a,
+ const FPScalar *fnormal,
+ const FPScalar *fah)
+{
+ return do_fp3_scalar_pair(s, a, s->fpcr_ah ? fah : fnormal);
+}
+
TRANS(FADDP_s, do_fp3_scalar_pair, a, &f_scalar_fadd)
-TRANS(FMAXP_s, do_fp3_scalar_pair, a, &f_scalar_fmax)
-TRANS(FMINP_s, do_fp3_scalar_pair, a, &f_scalar_fmin)
+TRANS(FMAXP_s, do_fp3_scalar_pair_2fn, a, &f_scalar_fmax, &f_scalar_fmax_a=
h)
+TRANS(FMINP_s, do_fp3_scalar_pair_2fn, a, &f_scalar_fmin, &f_scalar_fmin_a=
h)
TRANS(FMAXNMP_s, do_fp3_scalar_pair, a, &f_scalar_fmaxnm)
TRANS(FMINNMP_s, do_fp3_scalar_pair, a, &f_scalar_fminnm)
=20
diff --git a/target/arm/tcg/vec_helper.c b/target/arm/tcg/vec_helper.c
index 9f77aa6b919..61e6e54570c 100644
--- a/target/arm/tcg/vec_helper.c
+++ b/target/arm/tcg/vec_helper.c
@@ -2444,6 +2444,16 @@ DO_3OP_PAIR(gvec_fminnump_h, float16_minnum, float16=
, H2)
DO_3OP_PAIR(gvec_fminnump_s, float32_minnum, float32, H4)
DO_3OP_PAIR(gvec_fminnump_d, float64_minnum, float64, )
=20
+#ifdef TARGET_AARCH64
+DO_3OP_PAIR(gvec_ah_fmaxp_h, helper_vfp_ah_maxh, float16, H2)
+DO_3OP_PAIR(gvec_ah_fmaxp_s, helper_vfp_ah_maxs, float32, H4)
+DO_3OP_PAIR(gvec_ah_fmaxp_d, helper_vfp_ah_maxd, float64, )
+
+DO_3OP_PAIR(gvec_ah_fminp_h, helper_vfp_ah_minh, float16, H2)
+DO_3OP_PAIR(gvec_ah_fminp_s, helper_vfp_ah_mins, float32, H4)
+DO_3OP_PAIR(gvec_ah_fminp_d, helper_vfp_ah_mind, float64, )
+#endif
+
#undef DO_3OP_PAIR
=20
#define DO_3OP_PAIR(NAME, FUNC, TYPE, H) \
--=20
2.34.1