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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-arm@nongnu.org,
qemu-devel@nongnu.org
Subject: [PATCH v2 29/69] target/arm: Implement FPCR.AH semantics for SVE
FMIN/FMAX immediate
Date: Sat, 1 Feb 2025 16:39:32 +0000
Message-Id: <20250201164012.1660228-30-peter.maydell@linaro.org>
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Implement the FPCR.AH semantics for the SVE FMAX and FMIN operations
that take an immediate as the second operand.
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/sve_helper.c | 8 ++++++++
target/arm/tcg/translate-sve.c | 25 +++++++++++++++++++++++--
3 files changed, 45 insertions(+), 2 deletions(-)
diff --git a/target/arm/tcg/helper-sve.h b/target/arm/tcg/helper-sve.h
index 7ca95b8fa94..3c1d2624ed4 100644
--- a/target/arm/tcg/helper-sve.h
+++ b/target/arm/tcg/helper-sve.h
@@ -1231,6 +1231,20 @@ DEF_HELPER_FLAGS_6(sve_fmins_s, TCG_CALL_NO_RWG,
DEF_HELPER_FLAGS_6(sve_fmins_d, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, i64, fpst, i32)
=20
+DEF_HELPER_FLAGS_6(sve_ah_fmaxs_h, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, i64, fpst, i32)
+DEF_HELPER_FLAGS_6(sve_ah_fmaxs_s, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, i64, fpst, i32)
+DEF_HELPER_FLAGS_6(sve_ah_fmaxs_d, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, i64, fpst, i32)
+
+DEF_HELPER_FLAGS_6(sve_ah_fmins_h, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, i64, fpst, i32)
+DEF_HELPER_FLAGS_6(sve_ah_fmins_s, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, i64, fpst, i32)
+DEF_HELPER_FLAGS_6(sve_ah_fmins_d, TCG_CALL_NO_RWG,
+ void, ptr, ptr, ptr, i64, fpst, i32)
+
DEF_HELPER_FLAGS_5(sve_fcvt_sh, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, fpst, i32)
DEF_HELPER_FLAGS_5(sve_fcvt_dh, TCG_CALL_NO_RWG,
diff --git a/target/arm/tcg/sve_helper.c b/target/arm/tcg/sve_helper.c
index 3631d85f23a..2f6fc82ee4f 100644
--- a/target/arm/tcg/sve_helper.c
+++ b/target/arm/tcg/sve_helper.c
@@ -4459,6 +4459,14 @@ DO_ZPZS_FP(sve_fmins_h, float16, H1_2, float16_min)
DO_ZPZS_FP(sve_fmins_s, float32, H1_4, float32_min)
DO_ZPZS_FP(sve_fmins_d, float64, H1_8, float64_min)
=20
+DO_ZPZS_FP(sve_ah_fmaxs_h, float16, H1_2, helper_vfp_ah_maxh)
+DO_ZPZS_FP(sve_ah_fmaxs_s, float32, H1_4, helper_vfp_ah_maxs)
+DO_ZPZS_FP(sve_ah_fmaxs_d, float64, H1_8, helper_vfp_ah_maxd)
+
+DO_ZPZS_FP(sve_ah_fmins_h, float16, H1_2, helper_vfp_ah_minh)
+DO_ZPZS_FP(sve_ah_fmins_s, float32, H1_4, helper_vfp_ah_mins)
+DO_ZPZS_FP(sve_ah_fmins_d, float64, H1_8, helper_vfp_ah_mind)
+
/* Fully general two-operand expander, controlled by a predicate,
* With the extra float_status parameter.
*/
diff --git a/target/arm/tcg/translate-sve.c b/target/arm/tcg/translate-sve.c
index 35f6d78a0e0..187bd647c29 100644
--- a/target/arm/tcg/translate-sve.c
+++ b/target/arm/tcg/translate-sve.c
@@ -3821,14 +3821,35 @@ static bool do_fp_imm(DisasContext *s, arg_rpri_esz=
*a, uint64_t imm,
TRANS_FEAT(NAME##_zpzi, aa64_sve, do_fp_imm, a, \
name##_const[a->esz][a->imm], name##_fns[a->esz])
=20
+#define DO_FP_AH_IMM(NAME, name, const0, const1) \
+ static gen_helper_sve_fp2scalar * const name##_fns[4] =3D { \
+ NULL, gen_helper_sve_##name##_h, \
+ gen_helper_sve_##name##_s, \
+ gen_helper_sve_##name##_d \
+ }; \
+ static gen_helper_sve_fp2scalar * const name##_ah_fns[4] =3D { \
+ NULL, gen_helper_sve_ah_##name##_h, \
+ gen_helper_sve_ah_##name##_s, \
+ gen_helper_sve_ah_##name##_d \
+ }; \
+ static uint64_t const name##_const[4][2] =3D { \
+ { -1, -1 }, \
+ { float16_##const0, float16_##const1 }, \
+ { float32_##const0, float32_##const1 }, \
+ { float64_##const0, float64_##const1 }, \
+ }; \
+ TRANS_FEAT(NAME##_zpzi, aa64_sve, do_fp_imm, a, \
+ name##_const[a->esz][a->imm], \
+ s->fpcr_ah ? name##_ah_fns[a->esz] : name##_fns[a->esz])
+
DO_FP_IMM(FADD, fadds, half, one)
DO_FP_IMM(FSUB, fsubs, half, one)
DO_FP_IMM(FMUL, fmuls, half, two)
DO_FP_IMM(FSUBR, fsubrs, half, one)
DO_FP_IMM(FMAXNM, fmaxnms, zero, one)
DO_FP_IMM(FMINNM, fminnms, zero, one)
-DO_FP_IMM(FMAX, fmaxs, zero, one)
-DO_FP_IMM(FMIN, fmins, zero, one)
+DO_FP_AH_IMM(FMAX, fmaxs, zero, one)
+DO_FP_AH_IMM(FMIN, fmins, zero, one)
=20
#undef DO_FP_IMM
=20
--=20
2.34.1