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[PATCH v2 25/57] target/arm: Implement MVE VMULH
From: |
Peter Maydell |
Subject: |
[PATCH v2 25/57] target/arm: Implement MVE VMULH |
Date: |
Mon, 14 Jun 2021 16:09:35 +0100 |
Implement the MVE VMULH insn, which performs a vector
multiply and returns the high half of the result.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper-mve.h | 7 +++++++
target/arm/mve.decode | 3 +++
target/arm/mve_helper.c | 26 ++++++++++++++++++++++++++
target/arm/translate-mve.c | 2 ++
4 files changed, 38 insertions(+)
diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 707b9cbd546..5c80b185ccc 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -81,3 +81,10 @@ DEF_HELPER_FLAGS_4(mve_vsubw, TCG_CALL_NO_WG, void, env,
ptr, ptr, ptr)
DEF_HELPER_FLAGS_4(mve_vmulb, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
DEF_HELPER_FLAGS_4(mve_vmulh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
DEF_HELPER_FLAGS_4(mve_vmulw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+
+DEF_HELPER_FLAGS_4(mve_vmulhsb, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_4(mve_vmulhsh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_4(mve_vmulhsw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_4(mve_vmulhub, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_4(mve_vmulhuh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_4(mve_vmulhuw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index f7d1d303f17..ca4c27209da 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -82,6 +82,9 @@ VADD 1110 1111 0 . .. ... 0 ... 0 1000 . 1 . 0
... 0 @2op
VSUB 1111 1111 0 . .. ... 0 ... 0 1000 . 1 . 0 ... 0 @2op
VMUL 1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
+VMULH_S 111 0 1110 0 . .. ...1 ... 0 1110 . 0 . 0 ... 1 @2op
+VMULH_U 111 1 1110 0 . .. ...1 ... 0 1110 . 0 . 0 ... 1 @2op
+
# Vector miscellaneous
VCLS 1111 1111 1 . 11 .. 00 ... 0 0100 01 . 0 ... 0 @1op
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 4dc4aaa5932..687a5cd85c7 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -377,3 +377,29 @@ DO_2OP(veor, 8, uint64_t, DO_EOR)
DO_2OP_U(vadd, DO_ADD)
DO_2OP_U(vsub, DO_SUB)
DO_2OP_U(vmul, DO_MUL)
+
+/*
+ * Because the computation type is at least twice as large as required,
+ * these work for both signed and unsigned source types.
+ */
+static inline uint8_t do_mulh_b(int32_t n, int32_t m)
+{
+ return (n * m) >> 8;
+}
+
+static inline uint16_t do_mulh_h(int32_t n, int32_t m)
+{
+ return (n * m) >> 16;
+}
+
+static inline uint32_t do_mulh_w(int64_t n, int64_t m)
+{
+ return (n * m) >> 32;
+}
+
+DO_2OP(vmulhsb, 1, int8_t, do_mulh_b)
+DO_2OP(vmulhsh, 2, int16_t, do_mulh_h)
+DO_2OP(vmulhsw, 4, int32_t, do_mulh_w)
+DO_2OP(vmulhub, 1, uint8_t, do_mulh_b)
+DO_2OP(vmulhuh, 2, uint16_t, do_mulh_h)
+DO_2OP(vmulhuw, 4, uint32_t, do_mulh_w)
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index e51650625c5..1c7ef8e1110 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -347,3 +347,5 @@ DO_LOGIC(VEOR, gen_helper_mve_veor)
DO_2OP(VADD, vadd)
DO_2OP(VSUB, vsub)
DO_2OP(VMUL, vmul)
+DO_2OP(VMULH_S, vmulhs)
+DO_2OP(VMULH_U, vmulhu)
--
2.20.1
- [PATCH v2 14/57] target/arm: Implement MVE VCLZ, (continued)
- [PATCH v2 14/57] target/arm: Implement MVE VCLZ, Peter Maydell, 2021/06/14
- [PATCH v2 24/57] target/arm: Implement MVE VADD, VSUB, VMUL, Peter Maydell, 2021/06/14
- [PATCH v2 23/57] target/arm: Implement MVE VAND, VBIC, VORR, VORN, VEOR, Peter Maydell, 2021/06/14
- [PATCH v2 27/57] target/arm: Implement MVE VMAX, VMIN, Peter Maydell, 2021/06/14
- [PATCH v2 22/57] target/arm: Implement MVE VDUP, Peter Maydell, 2021/06/14
- [PATCH v2 28/57] target/arm: Implement MVE VABD, Peter Maydell, 2021/06/14
- [PATCH v2 29/57] target/arm: Implement MVE VHADD, VHSUB, Peter Maydell, 2021/06/14
- [PATCH v2 30/57] target/arm: Implement MVE VMULL, Peter Maydell, 2021/06/14
- [PATCH v2 25/57] target/arm: Implement MVE VMULH,
Peter Maydell <=
- [PATCH v2 26/57] target/arm: Implement MVE VRMULH, Peter Maydell, 2021/06/14
- [PATCH v2 32/57] target/arm: Implement MVE VMLSLDAV, Peter Maydell, 2021/06/14
- [PATCH v2 31/57] target/arm: Implement MVE VMLALDAV, Peter Maydell, 2021/06/14
- [PATCH v2 34/57] target/arm: Implement MVE VRMLALDAVH, VRMLSLDAVH, Peter Maydell, 2021/06/14
- [PATCH v2 33/57] include/qemu/int128.h: Add function to create Int128 from int64_t, Peter Maydell, 2021/06/14
- [PATCH v2 38/57] target/arm: Implement MVE VBRSR, Peter Maydell, 2021/06/14
- [PATCH v2 35/57] target/arm: Implement MVE VADD (scalar), Peter Maydell, 2021/06/14
- [PATCH v2 37/57] target/arm: Implement MVE VHADD, VHSUB (scalar), Peter Maydell, 2021/06/14