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target/loongarch: Update gdb_set_fpu() and gdb_get_fpu()

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GDB LoongArch fpu use fcc register, update gdb_set_fpu()
and gdb_get_fpu() to match it.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220805033523.1416837-6-gaosong@loongson.cn>
This commit is contained in:
Song Gao 2022-08-05 11:35:23 +08:00 • committed by Richard Henderson
parent d182c39000
commit 2f149c759f
3 changed files with 32 additions and 29 deletions
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24
linux-user/loongarch64/signal.c
View file

@ -71,26 +71,6 @@ struct extctx_layout {
struct ctx_layout end;
};
/* The kernel's sc_save_fcc macro is a sequence of MOVCF2GR+BSTRINS. */
static uint64_t read_all_fcc(CPULoongArchState *env)
{
uint64_t ret = 0;
for (int i = 0; i < 8; ++i) {
ret |= (uint64_t)env->cf[i] << (i * 8);
}
return ret;
}
/* The kernel's sc_restore_fcc macro is a sequence of BSTRPICK+MOVGR2CF. */
static void write_all_fcc(CPULoongArchState *env, uint64_t val)
{
for (int i = 0; i < 8; ++i) {
env->cf[i] = (val >> (i * 8)) & 1;
}
}
static abi_ptr extframe_alloc(struct extctx_layout *extctx,
struct ctx_layout *sctx, unsigned size,
unsigned align, abi_ptr orig_sp)
@ -150,7 +130,7 @@ static void setup_sigframe(CPULoongArchState *env,
for (i = 0; i < 32; ++i) {
__put_user(env->fpr[i], &fpu_ctx->regs[i]);
}
__put_user(read_all_fcc(env), &fpu_ctx->fcc);
__put_user(read_fcc(env), &fpu_ctx->fcc);
__put_user(env->fcsr0, &fpu_ctx->fcsr);
/*
@ -216,7 +196,7 @@ static void restore_sigframe(CPULoongArchState *env,
__get_user(env->fpr[i], &fpu_ctx->regs[i]);
}
__get_user(fcc, &fpu_ctx->fcc);
write_all_fcc(env, fcc);
write_fcc(env, fcc);
__get_user(env->fcsr0, &fpu_ctx->fcsr);
restore_fp_status(env);
}