target/riscv: rvv-1.0: narrowing floating-point/integer type-convert

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-65-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

4 files changed, 97 insertions, 44 deletions

diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index 606bf72d5c..1a0d817f0f 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -938,16 +938,18 @@ 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)
 
-DEF_HELPER_5(vfncvt_xu_f_v_h, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_xu_f_v_w, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_x_f_v_h, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_x_f_v_w, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_f_xu_v_h, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_f_xu_v_w, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_f_x_v_h, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_f_x_v_w, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_f_f_v_h, void, ptr, ptr, ptr, env, i32)
-DEF_HELPER_5(vfncvt_f_f_v_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_xu_f_w_b, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_xu_f_w_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_xu_f_w_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_x_f_w_b, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_x_f_w_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_x_f_w_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_f_xu_w_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_f_xu_w_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_f_x_w_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_f_x_w_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_f_f_w_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(vfncvt_f_f_w_w, void, ptr, ptr, ptr, env, i32)
 
 DEF_HELPER_6(vredsum_vs_b, void, ptr, ptr, ptr, ptr, env, i32)
 DEF_HELPER_6(vredsum_vs_h, void, ptr, ptr, ptr, ptr, env, i32)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 664d0fb371..c4fdc76a26 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -600,11 +600,16 @@ vfwcvt_f_x_v       010010 . ..... 01011 001 ..... 1010111 @r2_vm
 vfwcvt_f_f_v       010010 . ..... 01100 001 ..... 1010111 @r2_vm
 vfwcvt_rtz_xu_f_v  010010 . ..... 01110 001 ..... 1010111 @r2_vm
 vfwcvt_rtz_x_f_v   010010 . ..... 01111 001 ..... 1010111 @r2_vm
-vfncvt_xu_f_v   100010 . ..... 10000 001 ..... 1010111 @r2_vm
-vfncvt_x_f_v    100010 . ..... 10001 001 ..... 1010111 @r2_vm
-vfncvt_f_xu_v   100010 . ..... 10010 001 ..... 1010111 @r2_vm
-vfncvt_f_x_v    100010 . ..... 10011 001 ..... 1010111 @r2_vm
-vfncvt_f_f_v    100010 . ..... 10100 001 ..... 1010111 @r2_vm
+
+vfncvt_xu_f_w      010010 . ..... 10000 001 ..... 1010111 @r2_vm
+vfncvt_x_f_w       010010 . ..... 10001 001 ..... 1010111 @r2_vm
+vfncvt_f_xu_w      010010 . ..... 10010 001 ..... 1010111 @r2_vm
+vfncvt_f_x_w       010010 . ..... 10011 001 ..... 1010111 @r2_vm
+vfncvt_f_f_w       010010 . ..... 10100 001 ..... 1010111 @r2_vm
+vfncvt_rod_f_f_w   010010 . ..... 10101 001 ..... 1010111 @r2_vm
+vfncvt_rtz_xu_f_w  010010 . ..... 10110 001 ..... 1010111 @r2_vm
+vfncvt_rtz_x_f_w   010010 . ..... 10111 001 ..... 1010111 @r2_vm
+
 vredsum_vs      000000 . ..... ..... 010 ..... 1010111 @r_vm
 vredand_vs      000001 . ..... ..... 010 ..... 1010111 @r_vm
 vredor_vs       000010 . ..... ..... 010 ..... 1010111 @r_vm
diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
index b4cf044450..42e9449118 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -2623,17 +2623,17 @@ static bool opfv_narrow_check(DisasContext *s, arg_rmr *a)
            vext_check_sd(s, a->rd, a->rs2, a->vm);
 }
 
-#define GEN_OPFV_NARROW_TRANS(NAME)                                \
+#define GEN_OPFV_NARROW_TRANS(NAME, HELPER, FRM)                   \
 static bool trans_##NAME(DisasContext *s, arg_rmr *a)              \
 {                                                                  \
     if (opfv_narrow_check(s, a)) {                                 \
         uint32_t data = 0;                                         \
         static gen_helper_gvec_3_ptr * const fns[2] = {            \
-            gen_helper_##NAME##_h,                                 \
-            gen_helper_##NAME##_w,                                 \
+            gen_helper_##HELPER##_h,                               \
+            gen_helper_##HELPER##_w,                               \
         };                                                         \
         TCGLabel *over = gen_new_label();                          \
-        gen_set_rm(s, RISCV_FRM_DYN);                              \
+        gen_set_rm(s, FRM);                                        \
         tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);          \
                                                                    \
         data = FIELD_DP32(data, VDATA, VM, a->vm);                 \
@@ -2649,11 +2649,52 @@ static bool trans_##NAME(DisasContext *s, arg_rmr *a)              \
     return false;                                                  \
 }
 
-GEN_OPFV_NARROW_TRANS(vfncvt_xu_f_v)
-GEN_OPFV_NARROW_TRANS(vfncvt_x_f_v)
-GEN_OPFV_NARROW_TRANS(vfncvt_f_xu_v)
-GEN_OPFV_NARROW_TRANS(vfncvt_f_x_v)
-GEN_OPFV_NARROW_TRANS(vfncvt_f_f_v)
+GEN_OPFV_NARROW_TRANS(vfncvt_f_xu_w, vfncvt_f_xu_w, RISCV_FRM_DYN)
+GEN_OPFV_NARROW_TRANS(vfncvt_f_x_w, vfncvt_f_x_w, RISCV_FRM_DYN)
+GEN_OPFV_NARROW_TRANS(vfncvt_f_f_w, vfncvt_f_f_w, RISCV_FRM_DYN)
+/* Reuse the helper function from vfncvt.f.f.w */
+GEN_OPFV_NARROW_TRANS(vfncvt_rod_f_f_w, vfncvt_f_f_w, RISCV_FRM_ROD)
+
+static bool opxfv_narrow_check(DisasContext *s, arg_rmr *a)
+{
+    return require_rvv(s) &&
+           require_scale_rvf(s) &&
+           vext_check_isa_ill(s) &&
+           /* OPFV narrowing instructions ignore vs1 check */
+           vext_check_sd(s, a->rd, a->rs2, a->vm);
+}
+
+#define GEN_OPXFV_NARROW_TRANS(NAME, HELPER, FRM)                  \
+static bool trans_##NAME(DisasContext *s, arg_rmr *a)              \
+{                                                                  \
+    if (opxfv_narrow_check(s, a)) {                                \
+        uint32_t data = 0;                                         \
+        static gen_helper_gvec_3_ptr * const fns[3] = {            \
+            gen_helper_##HELPER##_b,                               \
+            gen_helper_##HELPER##_h,                               \
+            gen_helper_##HELPER##_w,                               \
+        };                                                         \
+        TCGLabel *over = gen_new_label();                          \
+        gen_set_rm(s, FRM);                                        \
+        tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);          \
+                                                                   \
+        data = FIELD_DP32(data, VDATA, VM, a->vm);                 \
+        tcg_gen_gvec_3_ptr(vreg_ofs(s, a->rd), vreg_ofs(s, 0),     \
+                           vreg_ofs(s, a->rs2), cpu_env,           \
+                           s->vlen / 8, s->vlen / 8, data,         \
+                           fns[s->sew]);                           \
+        mark_vs_dirty(s);                                          \
+        gen_set_label(over);                                       \
+        return true;                                               \
+    }                                                              \
+    return false;                                                  \
+}
+
+GEN_OPXFV_NARROW_TRANS(vfncvt_xu_f_w, vfncvt_xu_f_w, RISCV_FRM_DYN)
+GEN_OPXFV_NARROW_TRANS(vfncvt_x_f_w, vfncvt_x_f_w, RISCV_FRM_DYN)
+/* Reuse the helper functions from vfncvt.xu.f.w and vfncvt.x.f.w */
+GEN_OPXFV_NARROW_TRANS(vfncvt_rtz_xu_f_w, vfncvt_xu_f_w, RISCV_FRM_RTZ)
+GEN_OPXFV_NARROW_TRANS(vfncvt_rtz_x_f_w, vfncvt_x_f_w, RISCV_FRM_RTZ)
 
 /*
  *** Vector Reduction Operations
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index c3b7719291..a78f36b4b3 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -3820,31 +3820,36 @@ GEN_VEXT_V_ENV(vfwcvt_f_f_v_w, 4, 8)
 
 /* Narrowing Floating-Point/Integer Type-Convert Instructions */
 /* (TD, T2, TX2) */
+#define NOP_UU_B uint8_t,  uint16_t, uint32_t
 #define NOP_UU_H uint16_t, uint32_t, uint32_t
 #define NOP_UU_W uint32_t, uint64_t, uint64_t
 /* vfncvt.xu.f.v vd, vs2, vm # Convert float to unsigned integer. */
-RVVCALL(OPFVV1, vfncvt_xu_f_v_h, NOP_UU_H, H2, H4, float32_to_uint16)
-RVVCALL(OPFVV1, vfncvt_xu_f_v_w, NOP_UU_W, H4, H8, float64_to_uint32)
-GEN_VEXT_V_ENV(vfncvt_xu_f_v_h, 2, 2)
-GEN_VEXT_V_ENV(vfncvt_xu_f_v_w, 4, 4)
+RVVCALL(OPFVV1, vfncvt_xu_f_w_b, NOP_UU_B, H1, H2, float16_to_uint8)
+RVVCALL(OPFVV1, vfncvt_xu_f_w_h, NOP_UU_H, H2, H4, float32_to_uint16)
+RVVCALL(OPFVV1, vfncvt_xu_f_w_w, NOP_UU_W, H4, H8, float64_to_uint32)
+GEN_VEXT_V_ENV(vfncvt_xu_f_w_b, 1, 1)
+GEN_VEXT_V_ENV(vfncvt_xu_f_w_h, 2, 2)
+GEN_VEXT_V_ENV(vfncvt_xu_f_w_w, 4, 4)
 
 /* vfncvt.x.f.v vd, vs2, vm # Convert double-width float to signed integer. */
-RVVCALL(OPFVV1, vfncvt_x_f_v_h, NOP_UU_H, H2, H4, float32_to_int16)
-RVVCALL(OPFVV1, vfncvt_x_f_v_w, NOP_UU_W, H4, H8, float64_to_int32)
-GEN_VEXT_V_ENV(vfncvt_x_f_v_h, 2, 2)
-GEN_VEXT_V_ENV(vfncvt_x_f_v_w, 4, 4)
+RVVCALL(OPFVV1, vfncvt_x_f_w_b, NOP_UU_B, H1, H2, float16_to_int8)
+RVVCALL(OPFVV1, vfncvt_x_f_w_h, NOP_UU_H, H2, H4, float32_to_int16)
+RVVCALL(OPFVV1, vfncvt_x_f_w_w, NOP_UU_W, H4, H8, float64_to_int32)
+GEN_VEXT_V_ENV(vfncvt_x_f_w_b, 1, 1)
+GEN_VEXT_V_ENV(vfncvt_x_f_w_h, 2, 2)
+GEN_VEXT_V_ENV(vfncvt_x_f_w_w, 4, 4)
 
 /* vfncvt.f.xu.v vd, vs2, vm # Convert double-width unsigned integer to float */
-RVVCALL(OPFVV1, vfncvt_f_xu_v_h, NOP_UU_H, H2, H4, uint32_to_float16)
-RVVCALL(OPFVV1, vfncvt_f_xu_v_w, NOP_UU_W, H4, H8, uint64_to_float32)
-GEN_VEXT_V_ENV(vfncvt_f_xu_v_h, 2, 2)
-GEN_VEXT_V_ENV(vfncvt_f_xu_v_w, 4, 4)
+RVVCALL(OPFVV1, vfncvt_f_xu_w_h, NOP_UU_H, H2, H4, uint32_to_float16)
+RVVCALL(OPFVV1, vfncvt_f_xu_w_w, NOP_UU_W, H4, H8, uint64_to_float32)
+GEN_VEXT_V_ENV(vfncvt_f_xu_w_h, 2, 2)
+GEN_VEXT_V_ENV(vfncvt_f_xu_w_w, 4, 4)
 
 /* vfncvt.f.x.v vd, vs2, vm # Convert double-width integer to float. */
-RVVCALL(OPFVV1, vfncvt_f_x_v_h, NOP_UU_H, H2, H4, int32_to_float16)
-RVVCALL(OPFVV1, vfncvt_f_x_v_w, NOP_UU_W, H4, H8, int64_to_float32)
-GEN_VEXT_V_ENV(vfncvt_f_x_v_h, 2, 2)
-GEN_VEXT_V_ENV(vfncvt_f_x_v_w, 4, 4)
+RVVCALL(OPFVV1, vfncvt_f_x_w_h, NOP_UU_H, H2, H4, int32_to_float16)
+RVVCALL(OPFVV1, vfncvt_f_x_w_w, NOP_UU_W, H4, H8, int64_to_float32)
+GEN_VEXT_V_ENV(vfncvt_f_x_w_h, 2, 2)
+GEN_VEXT_V_ENV(vfncvt_f_x_w_w, 4, 4)
 
 /* vfncvt.f.f.v vd, vs2, vm # Convert double float to single-width float. */
 static uint16_t vfncvtffv16(uint32_t a, float_status *s)
@@ -3852,10 +3857,10 @@ static uint16_t vfncvtffv16(uint32_t a, float_status *s)
     return float32_to_float16(a, true, s);
 }
 
-RVVCALL(OPFVV1, vfncvt_f_f_v_h, NOP_UU_H, H2, H4, vfncvtffv16)
-RVVCALL(OPFVV1, vfncvt_f_f_v_w, NOP_UU_W, H4, H8, float64_to_float32)
-GEN_VEXT_V_ENV(vfncvt_f_f_v_h, 2, 2)
-GEN_VEXT_V_ENV(vfncvt_f_f_v_w, 4, 4)
+RVVCALL(OPFVV1, vfncvt_f_f_w_h, NOP_UU_H, H2, H4, vfncvtffv16)
+RVVCALL(OPFVV1, vfncvt_f_f_w_w, NOP_UU_W, H4, H8, float64_to_float32)
+GEN_VEXT_V_ENV(vfncvt_f_f_w_h, 2, 2)
+GEN_VEXT_V_ENV(vfncvt_f_f_w_w, 4, 4)
 
 /*
  *** Vector Reduction Operations