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target/m68k: implement rtd

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Add "Return and Deallocate" (rtd) instruction.

  RTD #d

    (SP) -> PC
    SP + 4 + d -> SP

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Tested-By: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Message-Id: <20170605100014.22981-1-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2017-06-05 12:00:14 +02:00
parent 65dfad62a1
commit 18059c9e16
3 changed files with 14 additions and 0 deletions
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2
target/m68k/cpu.c
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@ -130,6 +130,7 @@ static void m68020_cpu_initfn(Object *obj)
m68k_set_feature(env, M68K_FEATURE_FPU);
m68k_set_feature(env, M68K_FEATURE_CAS);
m68k_set_feature(env, M68K_FEATURE_BKPT);
m68k_set_feature(env, M68K_FEATURE_RTD);
}
#define m68030_cpu_initfn m68020_cpu_initfn
#define m68040_cpu_initfn m68020_cpu_initfn
@ -151,6 +152,7 @@ static void m68060_cpu_initfn(Object *obj)
m68k_set_feature(env, M68K_FEATURE_FPU);
m68k_set_feature(env, M68K_FEATURE_CAS);
m68k_set_feature(env, M68K_FEATURE_BKPT);
m68k_set_feature(env, M68K_FEATURE_RTD);
}
static void m5208_cpu_initfn(Object *obj)