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target/ppc: overhauled and moved logic of storing fpscr

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Followed the suggested overhaul to store_fpscr logic, and moved it to
cpu.c where it can be accessed in !TCG builds.

The overhaul was suggested because storing a value to fpscr should
never raise an exception, so we could remove all the mess that happened
with POWERPC_EXCP_FP.

We also moved fpscr_set_rounding_mode into cpu.c as it could now be moved
there, and it is needed when a value for the fpscr is being stored
directly.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Bruno Larsen (billionai) <bruno.larsen@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210527163522.23019-1-bruno.larsen@eldorado.org.br>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Bruno Larsen (billionai) 2021-05-27 13:35:22 -03:00 • committed by David Gibson
parent 1a1c9a00f3
commit fe43ba9721
4 changed files with 65 additions and 234 deletions
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6
target/ppc/gdbstub.c
View file

@ -271,7 +271,7 @@ int ppc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
break;
case 70:
/* fpscr */
store_fpscr(env, ldtul_p(mem_buf), 0xffffffff);
ppc_store_fpscr(env, ldtul_p(mem_buf));
break;
}
}
@ -321,7 +321,7 @@ int ppc_cpu_gdb_write_register_apple(CPUState *cs, uint8_t *mem_buf, int n)
break;
case 70 + 32:
/* fpscr */
store_fpscr(env, ldq_p(mem_buf), 0xffffffff);
ppc_store_fpscr(env, ldq_p(mem_buf));
break;
}
}
@ -474,7 +474,7 @@ static int gdb_set_float_reg(CPUPPCState *env, uint8_t *mem_buf, int n)
}
if (n == 32) {
ppc_maybe_bswap_register(env, mem_buf, 4);
store_fpscr(env, ldl_p(mem_buf), 0xffffffff);
ppc_store_fpscr(env, ldl_p(mem_buf));
return 4;
}
return 0;