riscv: fix setjmp assembly when compiling for ilp32f/lp64f.

per the psABI, floating point register contents beyond the register
size of the targeted ABI variant are never call-saved, so no
hwcap-conditional logic is needed here and the assembly-time
conditions are based purely on ABI variant macros, not the targeted
ISA level.

src/setjmp/riscv32/longjmp.S

@@ -23,18 +23,24 @@ longjmp:
 	lw ra,    52(a0)
 
 #ifndef __riscv_float_abi_soft
-	fld fs0,  56(a0)
+#ifdef __riscv_float_abi_double
-	fld fs1,  64(a0)
+#define FLX fld
-	fld fs2,  72(a0)
+#else
-	fld fs3,  80(a0)
+#define FLX flw
-	fld fs4,  88(a0)
+#endif
-	fld fs5,  96(a0)
+
-	fld fs6,  104(a0)
+	FLX fs0,  56(a0)
-	fld fs7,  112(a0)
+	FLX fs1,  64(a0)
-	fld fs8,  120(a0)
+	FLX fs2,  72(a0)
-	fld fs9,  128(a0)
+	FLX fs3,  80(a0)
-	fld fs10, 136(a0)
+	FLX fs4,  88(a0)
-	fld fs11, 144(a0)
+	FLX fs5,  96(a0)
+	FLX fs6,  104(a0)
+	FLX fs7,  112(a0)
+	FLX fs8,  120(a0)
+	FLX fs9,  128(a0)
+	FLX fs10, 136(a0)
+	FLX fs11, 144(a0)
 #endif
 
 	seqz a0, a1

src/setjmp/riscv32/setjmp.S

@@ -23,18 +23,24 @@ setjmp:
 	sw ra,    52(a0)
 
 #ifndef __riscv_float_abi_soft
-	fsd fs0,  56(a0)
+#ifdef __riscv_float_abi_double
-	fsd fs1,  64(a0)
+#define FSX fsd
-	fsd fs2,  72(a0)
+#else
-	fsd fs3,  80(a0)
+#define FSX fsw
-	fsd fs4,  88(a0)
+#endif
-	fsd fs5,  96(a0)
+
-	fsd fs6,  104(a0)
+	FSX fs0,  56(a0)
-	fsd fs7,  112(a0)
+	FSX fs1,  64(a0)
-	fsd fs8,  120(a0)
+	FSX fs2,  72(a0)
-	fsd fs9,  128(a0)
+	FSX fs3,  80(a0)
-	fsd fs10, 136(a0)
+	FSX fs4,  88(a0)
-	fsd fs11, 144(a0)
+	FSX fs5,  96(a0)
+	FSX fs6,  104(a0)
+	FSX fs7,  112(a0)
+	FSX fs8,  120(a0)
+	FSX fs9,  128(a0)
+	FSX fs10, 136(a0)
+	FSX fs11, 144(a0)
 #endif
 
 	li a0, 0

src/setjmp/riscv64/longjmp.S

@@ -23,18 +23,24 @@ longjmp:
 	ld ra,    104(a0)
 
 #ifndef __riscv_float_abi_soft
-	fld fs0,  112(a0)
+#ifdef __riscv_float_abi_double
-	fld fs1,  120(a0)
+#define FLX fld
-	fld fs2,  128(a0)
+#else
-	fld fs3,  136(a0)
+#define FLX flw
-	fld fs4,  144(a0)
+#endif
-	fld fs5,  152(a0)
+
-	fld fs6,  160(a0)
+	FLX fs0,  112(a0)
-	fld fs7,  168(a0)
+	FLX fs1,  120(a0)
-	fld fs8,  176(a0)
+	FLX fs2,  128(a0)
-	fld fs9,  184(a0)
+	FLX fs3,  136(a0)
-	fld fs10, 192(a0)
+	FLX fs4,  144(a0)
-	fld fs11, 200(a0)
+	FLX fs5,  152(a0)
+	FLX fs6,  160(a0)
+	FLX fs7,  168(a0)
+	FLX fs8,  176(a0)
+	FLX fs9,  184(a0)
+	FLX fs10, 192(a0)
+	FLX fs11, 200(a0)
 #endif
 
 	seqz a0, a1

src/setjmp/riscv64/setjmp.S

@@ -23,18 +23,24 @@ setjmp:
 	sd ra,    104(a0)
 
 #ifndef __riscv_float_abi_soft
-	fsd fs0,  112(a0)
+#ifdef __riscv_float_abi_double
-	fsd fs1,  120(a0)
+#define FSX fsd
-	fsd fs2,  128(a0)
+#else
-	fsd fs3,  136(a0)
+#define FSX fsw
-	fsd fs4,  144(a0)
+#endif
-	fsd fs5,  152(a0)
+
-	fsd fs6,  160(a0)
+	FSX fs0,  112(a0)
-	fsd fs7,  168(a0)
+	FSX fs1,  120(a0)
-	fsd fs8,  176(a0)
+	FSX fs2,  128(a0)
-	fsd fs9,  184(a0)
+	FSX fs3,  136(a0)
-	fsd fs10, 192(a0)
+	FSX fs4,  144(a0)
-	fsd fs11, 200(a0)
+	FSX fs5,  152(a0)
+	FSX fs6,  160(a0)
+	FSX fs7,  168(a0)
+	FSX fs8,  176(a0)
+	FSX fs9,  184(a0)
+	FSX fs10, 192(a0)
+	FSX fs11, 200(a0)
 #endif
 
 	li a0, 0