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linux-user/sparc: Handle getcc, setcc, getpsr traps

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These are really only meaningful for sparc32, but they're
still present for backward compatibility for sparc64.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-10-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2023-02-15 19:45:10 -10:00 committed by Laurent Vivier
parent 0908007f76
commit 6abc58eb97
1 changed files with 59 additions and 3 deletions
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62
linux-user/sparc/cpu_loop.c
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@ -149,6 +149,51 @@ static void flush_windows(CPUSPARCState *env)
#endif
}
static void next_instruction(CPUSPARCState *env)
{
env->pc = env->npc;
env->npc = env->npc + 4;
}
static uint32_t do_getcc(CPUSPARCState *env)
{
#ifdef TARGET_SPARC64
return cpu_get_ccr(env) & 0xf;
#else
return extract32(cpu_get_psr(env), 20, 4);
#endif
}
static void do_setcc(CPUSPARCState *env, uint32_t icc)
{
#ifdef TARGET_SPARC64
cpu_put_ccr(env, (cpu_get_ccr(env) & 0xf0) | (icc & 0xf));
#else
cpu_put_psr(env, deposit32(cpu_get_psr(env), 20, 4, icc));
#endif
}
static uint32_t do_getpsr(CPUSPARCState *env)
{
#ifdef TARGET_SPARC64
const uint64_t TSTATE_CWP = 0x1f;
const uint64_t TSTATE_ICC = 0xfull << 32;
const uint64_t TSTATE_XCC = 0xfull << 36;
const uint32_t PSR_S = 0x00000080u;
const uint32_t PSR_V8PLUS = 0xff000000u;
uint64_t tstate = sparc64_tstate(env);
/* See <asm/psrcompat.h>, tstate_to_psr. */
return ((tstate & TSTATE_CWP) |
PSR_S |
((tstate & TSTATE_ICC) >> 12) |
((tstate & TSTATE_XCC) >> 20) |
PSR_V8PLUS);
#else
return (cpu_get_psr(env) & (PSR_ICC | PSR_CWP)) | PSR_S;
#endif
}
/* Avoid ifdefs below for the abi32 and abi64 paths. */
#ifdef TARGET_ABI32
#define TARGET_TT_SYSCALL (TT_TRAP + 0x10) /* t_linux */
@ -218,9 +263,20 @@ void cpu_loop (CPUSPARCState *env)
case TT_TRAP + 0x03: /* flush windows */
flush_windows(env);
/* next instruction */
env->pc = env->npc;
env->npc = env->npc + 4;
next_instruction(env);
break;
case TT_TRAP + 0x20: /* getcc */
env->gregs[1] = do_getcc(env);
next_instruction(env);
break;
case TT_TRAP + 0x21: /* setcc */
do_setcc(env, env->gregs[1]);
next_instruction(env);
break;
case TT_TRAP + 0x22: /* getpsr */
env->gregs[1] = do_getpsr(env);
next_instruction(env);
break;
#ifdef TARGET_SPARC64