Merge remote-tracking branch 'remotes/bkoppelmann2/tags/pull-tricore-20190625' into staging

* Add FTOIZ/UTOF/QSEED insns
* Fix sync of hflags and swapped args of RRPW_INSERT

# gpg: Signature made Tue 25 Jun 2019 14:05:03 BST
# gpg:                using RSA key 6E636A7E83F2DD0CFA6E6E370AD2C6396B69CA14
# gpg:                issuer "kbastian@mail.uni-paderborn.de"
# gpg: Good signature from "Bastian Koppelmann <kbastian@mail.uni-paderborn.de>" [full]
# Primary key fingerprint: 6E63 6A7E 83F2 DD0C FA6E  6E37 0AD2 C639 6B69 CA14

* remotes/bkoppelmann2/tags/pull-tricore-20190625:
  tricore: add QSEED instruction
  tricore: sync ctx.hflags with tb->flags
  tricore: fix RRPW_INSERT instruction
  tricore: add UTOF instruction
  tricore: add FTOIZ instruction

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

3 files changed, 141 insertions, 2 deletions

diff --git a/target/tricore/fpu_helper.c b/target/tricore/fpu_helper.c
index d8a6c0d25b..cb7ee7dd35 100644
--- a/target/tricore/fpu_helper.c
+++ b/target/tricore/fpu_helper.c
@@ -24,6 +24,7 @@
 
 #define QUIET_NAN 0x7fc00000
 #define ADD_NAN   0x7fc00001
+#define SQRT_NAN  0x7fc00004
 #define DIV_NAN   0x7fc00008
 #define MUL_NAN   0x7fc00002
 #define FPU_FS PSW_USB_C
@@ -32,6 +33,9 @@
 #define FPU_FZ PSW_USB_AV
 #define FPU_FU PSW_USB_SAV
 
+#define float32_sqrt_nan make_float32(SQRT_NAN)
+#define float32_quiet_nan make_float32(QUIET_NAN)
+
 /* we don't care about input_denormal */
 static inline uint8_t f_get_excp_flags(CPUTriCoreState *env)
 {
@@ -166,6 +170,87 @@ uint32_t helper_fmul(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
 
 }
 
+/*
+ * Target TriCore QSEED.F significand Lookup Table
+ *
+ * The QSEED.F output significand depends on the least-significant
+ * exponent bit and the 6 most-significant significand bits.
+ *
+ * IEEE 754 float datatype
+ * partitioned into Sign (S), Exponent (E) and Significand (M):
+ *
+ * S   E E E E E E E E   M M M M M M ...
+ *    |             |               |
+ *    +------+------+-------+-------+
+ *           |              |
+ *          for        lookup table
+ *      calculating     index for
+ *        output E       output M
+ *
+ * This lookup table was extracted by analyzing QSEED output
+ * from the real hardware
+ */
+static const uint8_t target_qseed_significand_table[128] = {
+    253, 252, 245, 244, 239, 238, 231, 230, 225, 224, 217, 216,
+    211, 210, 205, 204, 201, 200, 195, 194, 189, 188, 185, 184,
+    179, 178, 175, 174, 169, 168, 165, 164, 161, 160, 157, 156,
+    153, 152, 149, 148, 145, 144, 141, 140, 137, 136, 133, 132,
+    131, 130, 127, 126, 123, 122, 121, 120, 117, 116, 115, 114,
+    111, 110, 109, 108, 103, 102, 99, 98, 93, 92, 89, 88, 83,
+    82, 79, 78, 75, 74, 71, 70, 67, 66, 63, 62, 59, 58, 55,
+    54, 53, 52, 49, 48, 45, 44, 43, 42, 39, 38, 37, 36, 33,
+    32, 31, 30, 27, 26, 25, 24, 23, 22, 19, 18, 17, 16, 15,
+    14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2
+};
+
+uint32_t helper_qseed(CPUTriCoreState *env, uint32_t r1)
+{
+    uint32_t arg1, S, E, M, E_minus_one, m_idx;
+    uint32_t new_E, new_M, new_S, result;
+
+    arg1 = make_float32(r1);
+
+    /* fetch IEEE-754 fields S, E and the uppermost 6-bit of M */
+    S = extract32(arg1, 31, 1);
+    E = extract32(arg1, 23, 8);
+    M = extract32(arg1, 17, 6);
+
+    if (float32_is_any_nan(arg1)) {
+        result = float32_quiet_nan;
+    } else if (float32_is_zero_or_denormal(arg1)) {
+        if (float32_is_neg(arg1)) {
+            result = float32_infinity | (1 << 31);
+        } else {
+            result = float32_infinity;
+        }
+    } else if (float32_is_neg(arg1)) {
+        result = float32_sqrt_nan;
+    } else if (float32_is_infinity(arg1)) {
+        result = float32_zero;
+    } else {
+        E_minus_one = E - 1;
+        m_idx = ((E_minus_one & 1) << 6) | M;
+        new_S = S;
+        new_E = 0xBD - E_minus_one / 2;
+        new_M = target_qseed_significand_table[m_idx];
+
+        result = 0;
+        result = deposit32(result, 31, 1, new_S);
+        result = deposit32(result, 23, 8, new_E);
+        result = deposit32(result, 15, 8, new_M);
+    }
+
+    if (float32_is_signaling_nan(arg1, &env->fp_status)
+        || result == float32_sqrt_nan) {
+        env->FPU_FI = 1 << 31;
+        env->FPU_FS = 1;
+    } else {
+        env->FPU_FS = 0;
+    }
+
+    return (uint32_t) result;
+}
+
 uint32_t helper_fdiv(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
 {
     uint32_t flags;
@@ -303,6 +388,47 @@ uint32_t helper_itof(CPUTriCoreState *env, uint32_t arg)
     return (uint32_t)f_result;
 }
 
+uint32_t helper_utof(CPUTriCoreState *env, uint32_t arg)
+{
+    float32 f_result;
+    uint32_t flags;
+
+    f_result = uint32_to_float32(arg, &env->fp_status);
+
+    flags = f_get_excp_flags(env);
+    if (flags) {
+        f_update_psw_flags(env, flags);
+    } else {
+        env->FPU_FS = 0;
+    }
+    return (uint32_t)f_result;
+}
+
+uint32_t helper_ftoiz(CPUTriCoreState *env, uint32_t arg)
+{
+    float32 f_arg = make_float32(arg);
+    uint32_t result;
+    int32_t flags;
+
+    result = float32_to_int32_round_to_zero(f_arg, &env->fp_status);
+
+    flags = f_get_excp_flags(env);
+    if (flags & float_flag_invalid) {
+        flags &= ~float_flag_inexact;
+        if (float32_is_any_nan(f_arg)) {
+            result = 0;
+        }
+    }
+
+    if (flags) {
+        f_update_psw_flags(env, flags);
+    } else {
+        env->FPU_FS = 0;
+    }
+
+    return result;
+}
+
 uint32_t helper_ftouz(CPUTriCoreState *env, uint32_t arg)
 {
     float32 f_arg = make_float32(arg);
diff --git a/target/tricore/helper.h b/target/tricore/helper.h
index f60e81096b..b64780c37d 100644
--- a/target/tricore/helper.h
+++ b/target/tricore/helper.h
@@ -109,8 +109,11 @@ DEF_HELPER_3(fdiv, i32, env, i32, i32)
 DEF_HELPER_4(fmadd, i32, env, i32, i32, i32)
 DEF_HELPER_4(fmsub, i32, env, i32, i32, i32)
 DEF_HELPER_3(fcmp, i32, env, i32, i32)
+DEF_HELPER_2(qseed, i32, env, i32)
 DEF_HELPER_2(ftoi, i32, env, i32)
 DEF_HELPER_2(itof, i32, env, i32)
+DEF_HELPER_2(utof, i32, env, i32)
+DEF_HELPER_2(ftoiz, i32, env, i32)
 DEF_HELPER_2(ftouz, i32, env, i32)
 DEF_HELPER_2(updfl, void, env, i32)
 /* dvinit */
diff --git a/target/tricore/translate.c b/target/tricore/translate.c
index 06c4485e55..dc2a65f3f9 100644
--- a/target/tricore/translate.c
+++ b/target/tricore/translate.c
@@ -6747,6 +6747,15 @@ static void decode_rr_divide(CPUTriCoreState *env, DisasContext *ctx)
     case OPC2_32_RR_UPDFL:
         gen_helper_updfl(cpu_env, cpu_gpr_d[r1]);
         break;
+    case OPC2_32_RR_UTOF:
+        gen_helper_utof(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
+        break;
+    case OPC2_32_RR_FTOIZ:
+        gen_helper_ftoiz(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
+        break;
+    case OPC2_32_RR_QSEED_F:
+        gen_helper_qseed(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
+        break;
     default:
         generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
     }
@@ -7019,9 +7028,9 @@ static void decode_rrpw_extract_insert(CPUTriCoreState *env, DisasContext *ctx)
         }
         break;
     case OPC2_32_RRPW_INSERT:
-        if (pos + width <= 31) {
+        if (pos + width <= 32) {
             tcg_gen_deposit_tl(cpu_gpr_d[r3], cpu_gpr_d[r1], cpu_gpr_d[r2],
-                               width, pos);
+                               pos, width);
         }
         break;
     default:
@@ -8804,6 +8813,7 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
     ctx.singlestep_enabled = cs->singlestep_enabled;
     ctx.bstate = BS_NONE;
     ctx.mem_idx = cpu_mmu_index(env, false);
+    ctx.hflags = (uint32_t)tb->flags;
 
     tcg_clear_temp_count();
     gen_tb_start(tb);