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target/ppc: Move else branch to avoid large if block in mmu6xx_get_physical_address() 

In mmu6xx_get_physical_address() we have a large if block with a two
line else branch that effectively returns. Invert the condition and
move the else there to allow deindenting the large if block to make
the flow easier to follow.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
BALATON Zoltan 2024-05-13 01:27:40 +02:00 committed by Nicholas Piggin
parent 269d6f006b
commit f1418bdeb0
1 changed files with 32 additions and 35 deletions
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19
target/ppc/mmu_common.c
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@ -405,11 +405,13 @@ static int mmu6xx_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
ret = -1;
if (!ds) {
/* Check if instruction fetch is allowed, if needed */
if (type != ACCESS_CODE || ctx->nx == 0) {
if (type == ACCESS_CODE && ctx->nx) {
qemu_log_mask(CPU_LOG_MMU, "No access allowed\n");
return -3;
}
/* Page address translation */
qemu_log_mask(CPU_LOG_MMU, "htab_base " HWADDR_FMT_plx
" htab_mask " HWADDR_FMT_plx
" hash " HWADDR_FMT_plx "\n",
qemu_log_mask(CPU_LOG_MMU, "htab_base " HWADDR_FMT_plx " htab_mask "
HWADDR_FMT_plx " hash " HWADDR_FMT_plx "\n",
ppc_hash32_hpt_base(cpu), ppc_hash32_hpt_mask(cpu), hash);
ctx->hash[0] = hash;
ctx->hash[1] = ~hash;
@ -424,9 +426,8 @@ static int mmu6xx_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
hwaddr curaddr;
uint32_t a0, a1, a2, a3;
qemu_log("Page table: " HWADDR_FMT_plx " len " HWADDR_FMT_plx
"\n", ppc_hash32_hpt_base(cpu),
ppc_hash32_hpt_mask(cpu) + 0x80);
qemu_log("Page table: " HWADDR_FMT_plx " len " HWADDR_FMT_plx "\n",
ppc_hash32_hpt_base(cpu), ppc_hash32_hpt_mask(cpu) + 0x80);
for (curaddr = ppc_hash32_hpt_base(cpu);
curaddr < (ppc_hash32_hpt_base(cpu)
+ ppc_hash32_hpt_mask(cpu) + 0x80);
@ -442,10 +443,6 @@ static int mmu6xx_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
}
}
#endif
} else {
qemu_log_mask(CPU_LOG_MMU, "No access allowed\n");
ret = -3;
}
} else {
qemu_log_mask(CPU_LOG_MMU, "direct store...\n");
/* Direct-store segment : absolutely *BUGGY* for now */