target/m68k: Implement FTRAPcc

Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220602013401.303699-14-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

diff --git a/target/m68k/translate.c b/target/m68k/translate.c
index 0dfddaa05628366ede639db867fe342834c23c50..8f3c298ad04f5889535d5f307409dfc918be6d22 100644 (file)
--- a/target/m68k/translate.c
+++ b/target/m68k/translate.c
@@ -5566,6 +5566,34 @@ DISAS_INSN(fscc)
     tcg_temp_free(tmp);
 }
 
+DISAS_INSN(ftrapcc)
+{
+    DisasCompare c;
+    uint16_t ext;
+    int cond;
+
+    ext = read_im16(env, s);
+    cond = ext & 0x3f;
+
+    /* Consume and discard the immediate operand. */
+    switch (extract32(insn, 0, 3)) {
+    case 2: /* ftrapcc.w */
+        (void)read_im16(env, s);
+        break;
+    case 3: /* ftrapcc.l */
+        (void)read_im32(env, s);
+        break;
+    case 4: /* ftrapcc (no operand) */
+        break;
+    default:
+        /* ftrapcc registered with only valid opmodes */
+        g_assert_not_reached();
+    }
+
+    gen_fcc_cond(&c, s, cond);
+    do_trapcc(s, &c);
+}
+
 #if defined(CONFIG_SOFTMMU)
 DISAS_INSN(frestore)
 {
@@ -6192,6 +6220,8 @@ void register_m68k_insns (CPUM68KState *env)
     INSN(fbcc,      f280, ffc0, CF_FPU);
     INSN(fpu,       f200, ffc0, FPU);
     INSN(fscc,      f240, ffc0, FPU);
+    INSN(ftrapcc,   f27a, fffe, FPU);       /* opmode 010, 011 */
+    INSN(ftrapcc,   f27c, ffff, FPU);       /* opmode 100 */
     INSN(fbcc,      f280, ff80, FPU);
 #if defined(CONFIG_SOFTMMU)
     INSN(frestore,  f340, ffc0, CF_FPU);