target/riscv: widening floating-point/integer type-convert instructions

Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20200701152549.1218-44-zhiwei_liu@c-sky.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

4 files changed, 106 insertions, 0 deletions

diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index d01e739..c5f1f29 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -1017,3 +1017,14 @@ DEF_HELPER_5(vfcvt_f_xu_v_d, void, ptr, ptr, ptr, env, i32)
 DEF_HELPER_5(vfcvt_f_x_v_h, void, ptr, ptr, ptr, env, i32)
 DEF_HELPER_5(vfcvt_f_x_v_w, void, ptr, ptr, ptr, env, i32)
 DEF_HELPER_5(vfcvt_f_x_v_d, void, ptr, ptr, ptr, env, i32)
+
+DEF_HELPER_5(vfwcvt_xu_f_v_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_xu_f_v_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_x_f_v_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_x_f_v_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_f_xu_v_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_f_xu_v_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_f_x_v_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_f_x_v_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_f_f_v_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfwcvt_f_f_v_w, void, ptr, ptr, ptr, env, i32)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 913c3b0..eda09f0 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -521,6 +521,11 @@ vfcvt_xu_f_v    100010 . ..... 00000 001 ..... 1010111 @r2_vm
 vfcvt_x_f_v     100010 . ..... 00001 001 ..... 1010111 @r2_vm
 vfcvt_f_xu_v    100010 . ..... 00010 001 ..... 1010111 @r2_vm
 vfcvt_f_x_v     100010 . ..... 00011 001 ..... 1010111 @r2_vm
+vfwcvt_xu_f_v   100010 . ..... 01000 001 ..... 1010111 @r2_vm
+vfwcvt_x_f_v    100010 . ..... 01001 001 ..... 1010111 @r2_vm
+vfwcvt_f_xu_v   100010 . ..... 01010 001 ..... 1010111 @r2_vm
+vfwcvt_f_x_v    100010 . ..... 01011 001 ..... 1010111 @r2_vm
+vfwcvt_f_f_v    100010 . ..... 01100 001 ..... 1010111 @r2_vm
 
 vsetvli         0 ........... ..... 111 ..... 1010111  @r2_zimm
 vsetvl          1000000 ..... ..... 111 ..... 1010111  @r
diff --git a/target/riscv/insn_trans/trans_rvv.inc.c b/target/riscv/insn_trans/trans_rvv.inc.c
index ed238ed..0fc8947 100644
--- a/target/riscv/insn_trans/trans_rvv.inc.c
+++ b/target/riscv/insn_trans/trans_rvv.inc.c
@@ -2228,3 +2228,51 @@ GEN_OPFV_TRANS(vfcvt_xu_f_v, opfv_check)
 GEN_OPFV_TRANS(vfcvt_x_f_v, opfv_check)
 GEN_OPFV_TRANS(vfcvt_f_xu_v, opfv_check)
 GEN_OPFV_TRANS(vfcvt_f_x_v, opfv_check)
+
+/* Widening Floating-Point/Integer Type-Convert Instructions */
+
+/*
+ * If the current SEW does not correspond to a supported IEEE floating-point
+ * type, an illegal instruction exception is raised
+ */
+static bool opfv_widen_check(DisasContext *s, arg_rmr *a)
+{
+    return (vext_check_isa_ill(s) &&
+            vext_check_overlap_mask(s, a->rd, a->vm, true) &&
+            vext_check_reg(s, a->rd, true) &&
+            vext_check_reg(s, a->rs2, false) &&
+            vext_check_overlap_group(a->rd, 2 << s->lmul, a->rs2,
+                                     1 << s->lmul) &&
+            (s->lmul < 0x3) && (s->sew < 0x3) && (s->sew != 0));
+}
+
+#define GEN_OPFV_WIDEN_TRANS(NAME)                                 \
+static bool trans_##NAME(DisasContext *s, arg_rmr *a)              \
+{                                                                  \
+    if (opfv_widen_check(s, a)) {                                  \
+        uint32_t data = 0;                                         \
+        static gen_helper_gvec_3_ptr * const fns[2] = {            \
+            gen_helper_##NAME##_h,                                 \
+            gen_helper_##NAME##_w,                                 \
+        };                                                         \
+        TCGLabel *over = gen_new_label();                          \
+        gen_set_rm(s, 7);                                          \
+        tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);          \
+                                                                   \
+        data = FIELD_DP32(data, VDATA, MLEN, s->mlen);             \
+        data = FIELD_DP32(data, VDATA, VM, a->vm);                 \
+        data = FIELD_DP32(data, VDATA, LMUL, s->lmul);             \
+        tcg_gen_gvec_3_ptr(vreg_ofs(s, a->rd), vreg_ofs(s, 0),     \
+                           vreg_ofs(s, a->rs2), cpu_env, 0,        \
+                           s->vlen / 8, data, fns[s->sew - 1]);    \
+        gen_set_label(over);                                       \
+        return true;                                               \
+    }                                                              \
+    return false;                                                  \
+}
+
+GEN_OPFV_WIDEN_TRANS(vfwcvt_xu_f_v)
+GEN_OPFV_WIDEN_TRANS(vfwcvt_x_f_v)
+GEN_OPFV_WIDEN_TRANS(vfwcvt_f_xu_v)
+GEN_OPFV_WIDEN_TRANS(vfwcvt_f_x_v)
+GEN_OPFV_WIDEN_TRANS(vfwcvt_f_f_v)
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index 8da9ca1..742080d 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -4251,3 +4251,45 @@ RVVCALL(OPFVV1, vfcvt_f_x_v_d, OP_UU_D, H8, H8, int64_to_float64)
 GEN_VEXT_V_ENV(vfcvt_f_x_v_h, 2, 2, clearh)
 GEN_VEXT_V_ENV(vfcvt_f_x_v_w, 4, 4, clearl)
 GEN_VEXT_V_ENV(vfcvt_f_x_v_d, 8, 8, clearq)
+
+/* Widening Floating-Point/Integer Type-Convert Instructions */
+/* (TD, T2, TX2) */
+#define WOP_UU_H uint32_t, uint16_t, uint16_t
+#define WOP_UU_W uint64_t, uint32_t, uint32_t
+/* vfwcvt.xu.f.v vd, vs2, vm # Convert float to double-width unsigned integer.*/
+RVVCALL(OPFVV1, vfwcvt_xu_f_v_h, WOP_UU_H, H4, H2, float16_to_uint32)
+RVVCALL(OPFVV1, vfwcvt_xu_f_v_w, WOP_UU_W, H8, H4, float32_to_uint64)
+GEN_VEXT_V_ENV(vfwcvt_xu_f_v_h, 2, 4, clearl)
+GEN_VEXT_V_ENV(vfwcvt_xu_f_v_w, 4, 8, clearq)
+
+/* vfwcvt.x.f.v vd, vs2, vm # Convert float to double-width signed integer. */
+RVVCALL(OPFVV1, vfwcvt_x_f_v_h, WOP_UU_H, H4, H2, float16_to_int32)
+RVVCALL(OPFVV1, vfwcvt_x_f_v_w, WOP_UU_W, H8, H4, float32_to_int64)
+GEN_VEXT_V_ENV(vfwcvt_x_f_v_h, 2, 4, clearl)
+GEN_VEXT_V_ENV(vfwcvt_x_f_v_w, 4, 8, clearq)
+
+/* vfwcvt.f.xu.v vd, vs2, vm # Convert unsigned integer to double-width float */
+RVVCALL(OPFVV1, vfwcvt_f_xu_v_h, WOP_UU_H, H4, H2, uint16_to_float32)
+RVVCALL(OPFVV1, vfwcvt_f_xu_v_w, WOP_UU_W, H8, H4, uint32_to_float64)
+GEN_VEXT_V_ENV(vfwcvt_f_xu_v_h, 2, 4, clearl)
+GEN_VEXT_V_ENV(vfwcvt_f_xu_v_w, 4, 8, clearq)
+
+/* vfwcvt.f.x.v vd, vs2, vm # Convert integer to double-width float. */
+RVVCALL(OPFVV1, vfwcvt_f_x_v_h, WOP_UU_H, H4, H2, int16_to_float32)
+RVVCALL(OPFVV1, vfwcvt_f_x_v_w, WOP_UU_W, H8, H4, int32_to_float64)
+GEN_VEXT_V_ENV(vfwcvt_f_x_v_h, 2, 4, clearl)
+GEN_VEXT_V_ENV(vfwcvt_f_x_v_w, 4, 8, clearq)
+
+/*
+ * vfwcvt.f.f.v vd, vs2, vm #
+ * Convert single-width float to double-width float.
+ */
+static uint32_t vfwcvtffv16(uint16_t a, float_status *s)
+{
+    return float16_to_float32(a, true, s);
+}
+
+RVVCALL(OPFVV1, vfwcvt_f_f_v_h, WOP_UU_H, H4, H2, vfwcvtffv16)
+RVVCALL(OPFVV1, vfwcvt_f_f_v_w, WOP_UU_W, H8, H4, float32_to_float64)
+GEN_VEXT_V_ENV(vfwcvt_f_f_v_h, 2, 4, clearl)
+GEN_VEXT_V_ENV(vfwcvt_f_f_v_w, 4, 8, clearq)