Implement the MVE incrementing/decrementing dup insns VIDUP, VDDUP,
VIWDUP and VDWDUP. These fill the elements of a vector with
successively incrementing values, starting at the offset specified in
a general purpose register. The final value of the offset is written
back to this register. The wrapping variants take a second general
purpose register which specifies the point where the count should
wrap back to 0.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
target/arm/helper-mve.h | 16 +++++
target/arm/mve.decode | 25 ++++++++
target/arm/mve_helper.c | 64 ++++++++++++++++++++
target/arm/translate-mve.c | 118 +++++++++++++++++++++++++++++++++++++
4 files changed, 223 insertions(+)
diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 84adfb21517..54b252e98af 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -35,6 +35,22 @@ DEF_HELPER_FLAGS_3(mve_vstrh_w, TCG_CALL_NO_WG, void, env, ptr, i32)
DEF_HELPER_FLAGS_3(mve_vdup, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vidupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+DEF_HELPER_FLAGS_4(mve_viduph, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+DEF_HELPER_FLAGS_4(mve_vidupw, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+
+DEF_HELPER_FLAGS_4(mve_vddupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+DEF_HELPER_FLAGS_4(mve_vdduph, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+DEF_HELPER_FLAGS_4(mve_vddupw, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+
+DEF_HELPER_FLAGS_5(mve_viwdupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+DEF_HELPER_FLAGS_5(mve_viwduph, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+DEF_HELPER_FLAGS_5(mve_viwdupw, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+
+DEF_HELPER_FLAGS_5(mve_vdwdupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+DEF_HELPER_FLAGS_5(mve_vdwduph, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+DEF_HELPER_FLAGS_5(mve_vdwdupw, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+
DEF_HELPER_FLAGS_3(mve_vclsb, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vclsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vclsw, TCG_CALL_NO_WG, void, env, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index de079ec517d..88c9c18ebf1 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -35,6 +35,8 @@
&2scalar qd qn rm size
&1imm qd imm cmode op
&2shift qd qm shift size
+&vidup qd rn size imm
+&viwdup qd rn rm size imm
@vldr_vstr ....... . . . . l:1 rn:4 ... ...... imm:7 &vldr_vstr qd=%qd u=0
# Note that both Rn and Qd are 3 bits only (no D bit)
@@ -259,6 +261,29 @@ VDUP 1110 1110 1 1 10 ... 0 .... 1011 . 0 0 1 0000 @vdup size=0
VDUP 1110 1110 1 0 10 ... 0 .... 1011 . 0 1 1 0000 @vdup size=1
VDUP 1110 1110 1 0 10 ... 0 .... 1011 . 0 0 1 0000 @vdup size=2
+# Incrementing and decrementing dup
+
+# VIDUP, VDDUP format immediate: 1 << (immh:imml)
+%imm_vidup 7:1 0:1 !function=vidup_imm
+
+# VIDUP, VDDUP registers: Rm bits [3:1] from insn, bit 0 is 1;
+# Rn bits [3:1] from insn, bit 0 is 0
+%vidup_rm 1:3 !function=times_2_plus_1
+%vidup_rn 17:3 !function=times_2
+
+@vidup .... .... . . size:2 .... .... .... .... .... \
+ qd=%qd imm=%imm_vidup rn=%vidup_rn &vidup
+@viwdup .... .... . . size:2 .... .... .... .... .... \
+ qd=%qd imm=%imm_vidup rm=%vidup_rm rn=%vidup_rn &viwdup
+{
+ VIDUP 1110 1110 0 . .. ... 1 ... 0 1111 . 110 111 . @vidup
+ VIWDUP 1110 1110 0 . .. ... 1 ... 0 1111 . 110 ... . @viwdup
+}
+{
+ VDDUP 1110 1110 0 . .. ... 1 ... 1 1111 . 110 111 . @vidup
+ VDWDUP 1110 1110 0 . .. ... 1 ... 1 1111 . 110 ... . @viwdup
+}
+
# multiply-add long dual accumulate
# rdahi: bits [3:1] from insn, bit 0 is 1
# rdalo: bits [3:1] from insn, bit 0 is 0
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index db5ec9266d1..0ef5f5d8871 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1698,3 +1698,67 @@ uint32_t HELPER(mve_sqrshr)(CPUARMState *env, uint32_t n, uint32_t shift)
{
return do_sqrshl_bhs(n, -(int8_t)shift, 32, true, &env->QF);
}
+
+#define DO_VIDUP(OP, ESIZE, TYPE, FN) \
+ uint32_t HELPER(mve_##OP)(CPUARMState *env, void *vd, \
+ uint32_t offset, uint32_t imm) \
+ { \
+ TYPE *d = vd; \
+ uint16_t mask = mve_element_mask(env); \
+ unsigned e; \
+ for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \
+ mergemask(&d[H##ESIZE(e)], offset, mask); \
+ offset = FN(offset, imm); \
+ } \
+ mve_advance_vpt(env); \
+ return offset; \
+ }
+
+#define DO_VIWDUP(OP, ESIZE, TYPE, FN) \
+ uint32_t HELPER(mve_##OP)(CPUARMState *env, void *vd, \
+ uint32_t offset, uint32_t wrap, \
+ uint32_t imm) \
+ { \
+ TYPE *d = vd; \
+ uint16_t mask = mve_element_mask(env); \
+ unsigned e; \
+ for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \
+ mergemask(&d[H##ESIZE(e)], offset, mask); \
+ offset = FN(offset, wrap, imm); \
+ } \
+ mve_advance_vpt(env); \
+ return offset; \
+ }
+
+#define DO_VIDUP_ALL(OP, FN) \
+ DO_VIDUP(OP##b, 1, int8_t, FN) \
+ DO_VIDUP(OP##h, 2, int16_t, FN) \
+ DO_VIDUP(OP##w, 4, int32_t, FN)
+
+#define DO_VIWDUP_ALL(OP, FN) \
+ DO_VIWDUP(OP##b, 1, int8_t, FN) \
+ DO_VIWDUP(OP##h, 2, int16_t, FN) \
+ DO_VIWDUP(OP##w, 4, int32_t, FN)
+
+static uint32_t do_add_wrap(uint32_t offset, uint32_t wrap, uint32_t imm)
+{
+ offset += imm;
+ if (offset == wrap) {
+ offset = 0;
+ }
+ return offset;
+}
+
+static uint32_t do_sub_wrap(uint32_t offset, uint32_t wrap, uint32_t imm)
+{
+ if (offset == 0) {
+ offset = wrap;
+ }
+ offset -= imm;
+ return offset;
+}
+
+DO_VIDUP_ALL(vidup, DO_ADD)
+DO_VIDUP_ALL(vddup, DO_SUB)
+DO_VIWDUP_ALL(viwdup, do_add_wrap)
+DO_VIWDUP_ALL(vdwdup, do_sub_wrap)
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index d318f34b2bc..52400864692 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -25,6 +25,11 @@
#include "translate.h"
#include "translate-a32.h"
+static inline int vidup_imm(DisasContext *s, int x)
+{
+ return 1 << x;
+}
+
/* Include the generated decoder */
#include "decode-mve.c.inc"
@@ -36,6 +41,8 @@ typedef void MVEGenTwoOpShiftFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
typedef void MVEGenDualAccOpFn(TCGv_i64, TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i64);
typedef void MVEGenVADDVFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32);
typedef void MVEGenOneOpImmFn(TCGv_ptr, TCGv_ptr, TCGv_i64);
+typedef void MVEGenVIDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32);
+typedef void MVEGenVIWDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32, TCGv_i32);
/* Return the offset of a Qn register (same semantics as aa32_vfp_qreg()) */
static inline long mve_qreg_offset(unsigned reg)
@@ -1059,3 +1066,114 @@ static bool trans_VSHLC(DisasContext *s, arg_VSHLC *a)
mve_update_eci(s);
return true;
}
+
+static bool do_vidup(DisasContext *s, arg_vidup *a, MVEGenVIDUPFn *fn)
+{
+ TCGv_ptr qd;
+ TCGv_i32 rn;
+
+ /*
+ * Vector increment/decrement with wrap and duplicate (VIDUP, VDDUP).
+ * This fills the vector with elements of successively increasing
+ * or decreasing values, starting from Rn.
+ */
+ if (!dc_isar_feature(aa32_mve, s) || !mve_check_qreg_bank(s, a->qd)) {
+ return false;
+ }
+ if (a->size == MO_64) {
+ /* size 0b11 is another encoding */
+ return false;
+ }
+ if (!mve_eci_check(s) || !vfp_access_check(s)) {
+ return true;
+ }
+
+ qd = mve_qreg_ptr(a->qd);
+ rn = load_reg(s, a->rn);
+ fn(rn, cpu_env, qd, rn, tcg_constant_i32(a->imm));
+ store_reg(s, a->rn, rn);
+ tcg_temp_free_ptr(qd);
+ mve_update_eci(s);
+ return true;
+}
+
+static bool do_viwdup(DisasContext *s, arg_viwdup *a, MVEGenVIWDUPFn *fn)
+{
+ TCGv_ptr qd;
+ TCGv_i32 rn, rm;
+
+ /*
+ * Vector increment/decrement with wrap and duplicate (VIWDUp, VDWDUP)
+ * This fills the vector with elements of successively increasing
+ * or decreasing values, starting from Rn. Rm specifies a point where
+ * the count wraps back around to 0. The updated offset is written back
+ * to Rn.
+ */
+ if (!dc_isar_feature(aa32_mve, s) || !mve_check_qreg_bank(s, a->qd)) {
+ return false;
+ }
+ if (!fn || a->rm == 13 || a->rm == 15) {
+ /*
+ * size 0b11 is another encoding; Rm == 13 is UNPREDICTABLE;
+ * Rm == 13 is VIWDUP, VDWDUP.
+ */
+ return false;
+ }
+ if (!mve_eci_check(s) || !vfp_access_check(s)) {
+ return true;
+ }
+
+ qd = mve_qreg_ptr(a->qd);
+ rn = load_reg(s, a->rn);
+ rm = load_reg(s, a->rm);
+ fn(rn, cpu_env, qd, rn, rm, tcg_constant_i32(a->imm));
+ store_reg(s, a->rn, rn);
+ tcg_temp_free_ptr(qd);
+ tcg_temp_free_i32(rm);
+ mve_update_eci(s);
+ return true;
+}
+
+static bool trans_VIDUP(DisasContext *s, arg_vidup *a)
+{
+ static MVEGenVIDUPFn * const fns[] = {
+ gen_helper_mve_vidupb,
+ gen_helper_mve_viduph,
+ gen_helper_mve_vidupw,
+ NULL,
+ };
+ return do_vidup(s, a, fns[a->size]);
+}
+
+static bool trans_VDDUP(DisasContext *s, arg_vidup *a)
+{
+ static MVEGenVIDUPFn * const fns[] = {
+ gen_helper_mve_vddupb,
+ gen_helper_mve_vdduph,
+ gen_helper_mve_vddupw,
+ NULL,
+ };
+ return do_vidup(s, a, fns[a->size]);
+}
+
+static bool trans_VIWDUP(DisasContext *s, arg_viwdup *a)
+{
+ static MVEGenVIWDUPFn * const fns[] = {
+ gen_helper_mve_viwdupb,
+ gen_helper_mve_viwduph,
+ gen_helper_mve_viwdupw,
+ NULL,
+ };
+ return do_viwdup(s, a, fns[a->size]);
+}
+
+static bool trans_VDWDUP(DisasContext *s, arg_viwdup *a)
+{
+ static MVEGenVIWDUPFn * const fns[] = {
+ gen_helper_mve_vdwdupb,
+ gen_helper_mve_vdwduph,
+ gen_helper_mve_vdwdupw,
+ NULL,
+ };
+ return do_viwdup(s, a, fns[a->size]);
+}
--
2.20.1