target/tricore: Implement FTOU insn

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-ID: <20230828112651.522058-5-kbastian@mail.uni-paderborn.de>

target/tricore/fpu_helper.c

@@ -429,6 +429,38 @@ uint32_t helper_ftoiz(CPUTriCoreState *env, uint32_t arg)
     return result;
 }
 
+uint32_t helper_ftou(CPUTriCoreState *env, uint32_t arg)
+{
+    float32 f_arg = make_float32(arg);
+    uint32_t result;
+    int32_t flags = 0;
+
+    result = float32_to_uint32(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;
+        }
+    /*
+     * we need to check arg < 0.0 before rounding as TriCore needs to raise
+     * float_flag_invalid as well. For instance, when we have a negative
+     * exponent and sign, softfloat would only raise float_flat_inexact.
+     */
+    } else if (float32_lt_quiet(f_arg, 0, &env->fp_status)) {
+        flags = float_flag_invalid;
+        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);

target/tricore/helper.h

@@ -114,6 +114,7 @@ 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(ftou, i32, env, i32)
 DEF_HELPER_2(ftouz, i32, env, i32)
 DEF_HELPER_2(updfl, void, env, i32)
 /* dvinit */

target/tricore/translate.c

@@ -6269,6 +6269,9 @@ static void decode_rr_divide(DisasContext *ctx)
     case OPC2_32_RR_ITOF:
         gen_helper_itof(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
         break;
+    case OPC2_32_RR_FTOU:
+        gen_helper_ftou(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
+        break;
     case OPC2_32_RR_FTOUZ:
         gen_helper_ftouz(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
         break;

tests/tcg/tricore/Makefile.softmmu-target

@@ -15,6 +15,7 @@ TESTS += test_dvstep.asm.tst
 TESTS += test_fadd.asm.tst
 TESTS += test_fmul.asm.tst
 TESTS += test_ftoi.asm.tst
+TESTS += test_ftou.asm.tst
 TESTS += test_imask.asm.tst
 TESTS += test_insert.asm.tst
 TESTS += test_ld_bu.asm.tst

tests/tcg/tricore/asm/test_ftou.S

@@ -0,0 +1,12 @@
+#include "macros.h"
+.text
+.global _start
+_start:
+    TEST_D_D(ftou, 1, 0x00000000, 0x1733f6c2)
+    TEST_D_D(ftou, 2, 0x00000000, 0x2c9d9cdc)
+    TEST_D_D(ftou, 3, 0xffffffff, 0x56eb7395)
+    TEST_D_D(ftou, 4, 0x79900800, 0x4ef32010)
+    TEST_D_D(ftou, 5, 0x0353f510, 0x4c54fd44)
+
+    TEST_PASSFAIL
+