[PATCH 05/10] target/tricore: Implement ftohp insn

[Bastian Koppelmann]

reported in https://gitlab.com/qemu-project/qemu/-/issues/1667

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
---
 target/tricore/fpu_helper.c               | 41 +++++++++++++++++++++++
 target/tricore/helper.c                   |  1 +
 target/tricore/helper.h                   |  1 +
 target/tricore/translate.c                |  7 ++++
 target/tricore/tricore-opcodes.h          |  1 +
 tests/tcg/tricore/Makefile.softmmu-target |  1 +
 tests/tcg/tricore/asm/test_ftohp.S        | 14 ++++++++
 7 files changed, 66 insertions(+)
 create mode 100644 tests/tcg/tricore/asm/test_ftohp.S

diff --git a/target/tricore/fpu_helper.c b/target/tricore/fpu_helper.c
index ceacb6657e..3db2341ac0 100644
--- a/target/tricore/fpu_helper.c
+++ b/target/tricore/fpu_helper.c
@@ -27,6 +27,8 @@
 #define SQRT_NAN  0x7fc00004
 #define DIV_NAN   0x7fc00008
 #define MUL_NAN   0x7fc00002
+#define HP_NEG_INFINITY 0xfc00
+#define HP_POS_INFINITY 0x7c00
 #define FPU_FS PSW_USB_C
 #define FPU_FI PSW_USB_V
 #define FPU_FV PSW_USB_SV
@@ -373,6 +375,45 @@ uint32_t helper_ftoi(CPUTriCoreState *env, uint32_t arg)
     return (uint32_t)result;
 }
 
+uint32_t helper_ftohp(CPUTriCoreState *env, uint32_t arg)
+{
+    float32 f_arg = make_float32(arg);
+    uint32_t result = 0;
+    int32_t flags = 0;
+
+    if (float32_is_infinity(f_arg)) {
+        if (float32_is_neg(f_arg)) {
+            return  HP_NEG_INFINITY;
+        } else {
+            return  HP_POS_INFINITY;
+        }
+    } else if (float32_is_any_nan(f_arg)) {
+        if (float32_is_signaling_nan(f_arg, &env->fp_status)) {
+            flags |= float_flag_invalid;
+        }
+        result = float16_set_sign(result, arg >> 31);
+        result = deposit32(result, 10, 5, 0x1f);
+        result = deposit32(result, 8, 2, extract32(arg, 21, 2));
+        result = deposit32(result, 0, 8, extract32(arg, 0, 8));
+        if (extract32(result, 0, 10) == 0) {
+            result |= (1 << 8);
+        }
+    } else {
+        set_flush_to_zero(0, &env->fp_status);
+        result = float32_to_float16(f_arg, true, &env->fp_status);
+        set_flush_to_zero(1, &env->fp_status);
+        flags = f_get_excp_flags(env);
+    }
+
+    if (flags) {
+        f_update_psw_flags(env, flags);
+    } else {
+        env->FPU_FS = 0;
+    }
+
+    return result;
+}
+
 uint32_t helper_itof(CPUTriCoreState *env, uint32_t arg)
 {
     float32 f_result;
diff --git a/target/tricore/helper.c b/target/tricore/helper.c
index e615c3d6d4..6ccb52fea7 100644
--- a/target/tricore/helper.c
+++ b/target/tricore/helper.c
@@ -137,6 +137,7 @@ void fpu_set_state(CPUTriCoreState *env)
 
     set_flush_inputs_to_zero(1, &env->fp_status);
     set_flush_to_zero(1, &env->fp_status);
+    set_float_detect_tininess(true, &env->fp_status);
     set_default_nan_mode(1, &env->fp_status);
 }
 
diff --git a/target/tricore/helper.h b/target/tricore/helper.h
index 827fbaa692..dcc5a492b3 100644
--- a/target/tricore/helper.h
+++ b/target/tricore/helper.h
@@ -111,6 +111,7 @@ 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(ftohp, i32, env, i32)
 DEF_HELPER_2(itof, i32, env, i32)
 DEF_HELPER_2(utof, i32, env, i32)
 DEF_HELPER_2(ftoiz, i32, env, i32)
diff --git a/target/tricore/translate.c b/target/tricore/translate.c
index fb9a7113a8..d94c273f89 100644
--- a/target/tricore/translate.c
+++ b/target/tricore/translate.c
@@ -6264,6 +6264,13 @@ static void decode_rr_divide(DisasContext *ctx)
     case OPC2_32_RR_DIV_F:
         gen_helper_fdiv(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1], cpu_gpr_d[r2]);
         break;
+    case OPC2_32_RR_FTOHP:
+        if (has_feature(ctx, TRICORE_FEATURE_162)) {
+            gen_helper_ftohp(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
+        } else {
+            generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
+        }
+        break;
     case OPC2_32_RR_CMP_F:
         gen_helper_fcmp(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1], cpu_gpr_d[r2]);
         break;
diff --git a/target/tricore/tricore-opcodes.h b/target/tricore/tricore-opcodes.h
index f070571665..29e655a667 100644
--- a/target/tricore/tricore-opcodes.h
+++ b/target/tricore/tricore-opcodes.h
@@ -1152,6 +1152,7 @@ enum {
     OPC2_32_RR_ITOF                              = 0x14,
     OPC2_32_RR_CMP_F                             = 0x00,
     OPC2_32_RR_FTOIZ                             = 0x13,
+    OPC2_32_RR_FTOHP                             = 0x25, /* 1.6.2 only */
     OPC2_32_RR_FTOQ31                            = 0x11,
     OPC2_32_RR_FTOQ31Z                           = 0x18,
     OPC2_32_RR_FTOU                              = 0x12,
diff --git a/tests/tcg/tricore/Makefile.softmmu-target 
b/tests/tcg/tricore/Makefile.softmmu-target
index e6ed5c56f2..f4a27a83e4 100644
--- a/tests/tcg/tricore/Makefile.softmmu-target
+++ b/tests/tcg/tricore/Makefile.softmmu-target
@@ -14,6 +14,7 @@ TESTS += test_dextr.asm.tst
 TESTS += test_dvstep.asm.tst
 TESTS += test_fadd.asm.tst
 TESTS += test_fmul.asm.tst
+TESTS += test_ftohp.asm.tst
 TESTS += test_ftoi.asm.tst
 TESTS += test_ftou.asm.tst
 TESTS += test_imask.asm.tst
diff --git a/tests/tcg/tricore/asm/test_ftohp.S 
b/tests/tcg/tricore/asm/test_ftohp.S
new file mode 100644
index 0000000000..9e23141c1e
--- /dev/null
+++ b/tests/tcg/tricore/asm/test_ftohp.S
@@ -0,0 +1,14 @@
+#include "macros.h"
+.text
+.global _start
+_start:
+    TEST_D_D(ftohp, 1, 0xffff, 0xffffffff)
+    TEST_D_D(ftohp, 2, 0xfc00, 0xff800000)
+    TEST_D_D(ftohp, 3, 0x7c00, 0x7f800000)
+    TEST_D_D(ftohp, 4, 0x0, 0x0)
+    TEST_D_D(ftohp, 5, 0x5, 0x34a43580)
+
+    #TEST_D_D_PSW(ftohp, 6, 0x400, 0x8c000b80, 0x387fee74)
+
+    TEST_PASSFAIL
+
-- 
2.41.0