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target/sparc: Split psr and xcc into components

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Step in removing CC_OP: change the representation of CC_OP_FLAGS.
The 8 bits are distributed between 6 variables, which should make
it easy to keep up to date.

The code within cc_helper.c is quite ugly but is only temporary.

Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-10-14 18:24:19 -07:00
parent b1fa27fcc8
commit 2a1905c79e
7 changed files with 291 additions and 272 deletions
Download patch file Download diff file Expand all files Collapse all files

6
linux-user/sparc/cpu_loop.c
View file

@ -197,10 +197,8 @@ static uint32_t do_getpsr(CPUSPARCState *env)
/* Avoid ifdefs below for the abi32 and abi64 paths. */
#ifdef TARGET_ABI32
#define TARGET_TT_SYSCALL (TT_TRAP + 0x10) /* t_linux */
#define syscall_cc psr
#else
#define TARGET_TT_SYSCALL (TT_TRAP + 0x6d) /* tl0_linux64 */
#define syscall_cc xcc
#endif
/* Avoid ifdefs below for the v9 and pre-v9 hw traps. */
@ -240,10 +238,10 @@ void cpu_loop (CPUSPARCState *env)
break;
}
if ((abi_ulong)ret >= (abi_ulong)(-515)) {
env->syscall_cc |= PSR_CARRY;
set_syscall_C(env, 1);
ret = -ret;
} else {
env->syscall_cc &= ~PSR_CARRY;
set_syscall_C(env, 0);
}
env->regwptr[0] = ret;
/* next instruction */

17
linux-user/sparc/target_cpu.h
View file

@ -26,6 +26,17 @@
# define TARGET_STACK_BIAS 0
#endif
static void set_syscall_C(CPUSPARCState *env, bool val)
{
#ifndef TARGET_SPARC64
env->icc_C = val;
#elif defined(TARGET_ABI32)
env->icc_C = (uint64_t)val << 32;
#else
env->xcc_C = val;
#endif
}
static inline void cpu_clone_regs_child(CPUSPARCState *env, target_ulong newsp,
unsigned flags)
{
@ -58,11 +69,7 @@ static inline void cpu_clone_regs_child(CPUSPARCState *env, target_ulong newsp,
* do the pc advance twice.
*/
env->regwptr[WREG_O0] = 0;
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
env->xcc &= ~PSR_CARRY;
#else
env->psr &= ~PSR_CARRY;
#endif
set_syscall_C(env, 0);
env->pc = env->npc;
env->npc = env->npc + 4;
}