+/**
+ * struct mode_req - ABI FPU mode requirements
+ * @single: The program being loaded needs an FPU but it will only issue
+ * single precision instructions meaning that it can execute in
+ * either FR0 or FR1.
+ * @soft: The soft(-float) requirement means that the program being
+ * loaded needs has no FPU dependency at all (i.e. it has no
+ * FPU instructions).
+ * @fr1: The program being loaded depends on FPU being in FR=1 mode.
+ * @frdefault: The program being loaded depends on the default FPU mode.
+ * That is FR0 for O32 and FR1 for N32/N64.
+ * @fre: The program being loaded depends on FPU with FRE=1. This mode is
+ * a bridge which uses FR=1 whilst still being able to maintain
+ * full compatibility with pre-existing code using the O32 FP32
+ * ABI.
+ *
+ * More information about the FP ABIs can be found here:
+ *
+ * https://dmz-portal.mips.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking#10.4.1._Basic_mode_set-up
+ *
+ */
+
+struct mode_req {
+ bool single;
+ bool soft;
+ bool fr1;
+ bool frdefault;
+ bool fre;
+};
+
+static const struct mode_req fpu_reqs[] = {
+ [MIPS_ABI_FP_ANY] = { true, true, true, true, true },
+ [MIPS_ABI_FP_DOUBLE] = { false, false, false, true, true },
+ [MIPS_ABI_FP_SINGLE] = { true, false, false, false, false },
+ [MIPS_ABI_FP_SOFT] = { false, true, false, false, false },
+ [MIPS_ABI_FP_OLD_64] = { false, false, false, false, false },
+ [MIPS_ABI_FP_XX] = { false, false, true, true, true },
+ [MIPS_ABI_FP_64] = { false, false, true, false, false },
+ [MIPS_ABI_FP_64A] = { false, false, true, false, true }
+};
+
+/*
+ * Mode requirements when .MIPS.abiflags is not present in the ELF.
+ * Not present means that everything is acceptable except FR1.
+ */
+static struct mode_req none_req = { true, true, false, true, true };
+