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

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>

1 files changed, 2 insertions, 22 deletions

diff --git a/linux-user/loongarch64/signal.c b/linux-user/loongarch64/signal.c
index 65fd5f3857..7c7afb652e 100644
--- a/linux-user/loongarch64/signal.c
+++ b/linux-user/loongarch64/signal.c
@@ -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);
     }