Fix the V850 assembler's generation of relocations for the st.b instruction.

PR 28292
gas	* config/tc-v850.c (handle_lo16): Also accept
	BFD_RELOC_V850_LO16_SPLIT_OFFSET.
	* testsuite/gas/v850/split-lo16.s: Add extra line.
	* testsuite/gas/v850/split-lo16.d: Update expected disassembly.

opcodes	* v850-opc.c (D16): Use BFD_RELOC_V850_LO16_SPLIT_OFFSET in place
	of BFD_RELOC_16.

gas/ChangeLog

@@ -1,3 +1,11 @@
+2021-09-02  Nick Clifton  <nickc@redhat.com>
+
+	PR 28292
+	* config/tc-v850.c (handle_lo16): Also accept
+	BFD_RELOC_V850_LO16_SPLIT_OFFSET.
+	* testsuite/gas/v850/split-lo16.s: Add extra line.
+	* testsuite/gas/v850/split-lo16.d: Update expected disassembly.
+
 2021-08-11  Darius Galis  <darius.galis@cyberthorstudios.com>
 
 	* config/rx-parse.y (DECNT): Fixed typo.

gas/config/tc-v850.c

@@ -1713,7 +1713,7 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
       /* Now create the conditional branch + fixup to the final target.  */
       /* 0x000107ea = bne LBL(disp17).  */
       md_number_to_chars ((char *) buffer + 2, 0x000107ea, 4);
-      fix_new (fragP, fragP->fr_fix+2, 4, fragP->fr_symbol,
+      fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
 	       fragP->fr_offset, 1,
 	       BFD_RELOC_V850_17_PCREL);
       fragP->fr_fix += 6;
@@ -2020,22 +2020,19 @@ handle_lo16 (const struct v850_operand *operand, const char **errmsg)
 {
   if (operand == NULL)
     return BFD_RELOC_LO16;
-
-  if (operand->default_reloc == BFD_RELOC_LO16)
-    return BFD_RELOC_LO16;
-
-  if (operand->default_reloc == BFD_RELOC_V850_16_SPLIT_OFFSET)
-    return BFD_RELOC_V850_LO16_SPLIT_OFFSET;
-
-  if (operand->default_reloc == BFD_RELOC_V850_16_S1)
-    return BFD_RELOC_V850_LO16_S1;
-
-  if (operand->default_reloc == BFD_RELOC_16)
-    return BFD_RELOC_LO16;
-
-  *errmsg = _("lo() relocation used on an instruction which does "
-	      "not support it");
-  return BFD_RELOC_64;  /* Used to indicate an error condition.  */
+  
+  switch (operand->default_reloc)
+    {
+    case BFD_RELOC_LO16: return BFD_RELOC_LO16;
+    case BFD_RELOC_V850_LO16_SPLIT_OFFSET: return BFD_RELOC_V850_LO16_SPLIT_OFFSET;
+    case BFD_RELOC_V850_16_SPLIT_OFFSET: return BFD_RELOC_V850_LO16_SPLIT_OFFSET;
+    case BFD_RELOC_V850_16_S1: return BFD_RELOC_V850_LO16_S1;
+    case BFD_RELOC_16: return BFD_RELOC_LO16;
+    default:
+      *errmsg = _("lo() relocation used on an instruction which does "
+		  "not support it");
+      return BFD_RELOC_64;  /* Used to indicate an error condition.  */
+    }
 }
 
 static bfd_reloc_code_real_type
@@ -2157,15 +2154,15 @@ v850_reloc_prefix (const struct v850_operand *operand, const char **errmsg)
       return reloc;							\
     }
 
-  CHECK_ ("hi0",    handle_hi016(operand, errmsg)  );
-  CHECK_ ("hi",	    handle_hi16(operand, errmsg)   );
-  CHECK_ ("lo",	    handle_lo16 (operand, errmsg)  );
+  CHECK_ ("hi0",    handle_hi016 (operand, errmsg));
+  CHECK_ ("hi",	    handle_hi16 (operand, errmsg));
+  CHECK_ ("lo",	    handle_lo16 (operand, errmsg));
   CHECK_ ("sdaoff", handle_sdaoff (operand, errmsg));
   CHECK_ ("zdaoff", handle_zdaoff (operand, errmsg));
   CHECK_ ("tdaoff", handle_tdaoff (operand, errmsg));
   CHECK_ ("hilo",   BFD_RELOC_32);
   CHECK_ ("lo23",   BFD_RELOC_V850_23);
-  CHECK_ ("ctoff",  handle_ctoff (operand, errmsg) );
+  CHECK_ ("ctoff",  handle_ctoff (operand, errmsg));
 
   /* Restore skipped parenthesis.  */
   if (paren_skipped)

gas/testsuite/gas/v850/split-lo16.d

@@ -8,11 +8,13 @@
    4:	01 16 00 00 	addi	0, r1, r2
 			6: R_V8.*	foo
    8:	01 17 00 00 	ld\.b	0\[r1\], r2
-			a: R_V8.*	foo
+			8: R_V8.*	foo
    c:	81 17 01 00 	ld\.bu	0\[r1\], r2
 			c: R_V8.*	foo
   10:	a1 17 45 23 	ld\.bu	9029\[r1\], r2
   14:	81 17 57 34 	ld\.bu	13398\[r1\], r2
   18:	20 57 01 00 	ld.w	0\[r0\], r10
   1c:	20 57 79 56 	ld.w	22136\[r0\], r10
+  20:	40 57 00 00 	st.b	r10, 0\[r0\]
+			20: R_V8.*	VSWC
 #pass

gas/testsuite/gas/v850/split-lo16.s

@@ -6,5 +6,8 @@
 	ld.bu	lo(0x12345),r1,r2
 	ld.bu	lo(0x123456),r1,r2
 
-	ld.w lo(0)[r0], r10
-	ld.w lo(0x12345678)[r0], r10
+	ld.w    lo(0)[r0], r10
+	ld.w    lo(0x12345678)[r0], r10
+
+	# This is from PR 28292
+	st.b    r10, VSWC[r0]

opcodes/ChangeLog

@@ -1,3 +1,9 @@
+2021-09-02  Nick Clifton  <nickc@redhat.com>
+
+	PR 28292
+	* v850-opc.c (D16): Use BFD_RELOC_V850_LO16_SPLIT_OFFSET in place
+	of BFD_RELOC_16.
+
 2021-08-17  Shahab Vahedi <shahab@synopsys.com>
 
 	* arc-regs.h (DEF): Fix the register numbers.

opcodes/v850-opc.c

@@ -1190,7 +1190,7 @@ const struct v850_operand v850_operands[] =
 
 /* The disp16 field in a format 8 insn.  */
 #define D16	(I16U + 1)
-  { 16, 16, NULL, NULL, V850_OPERAND_SIGNED | V850_OPERAND_DISP, BFD_RELOC_16 },
+  { 16, 16, NULL, NULL, V850_OPERAND_SIGNED | V850_OPERAND_DISP, BFD_RELOC_V850_LO16_SPLIT_OFFSET },
 
 /* The disp16 field in an format 7 unsigned byte load insn.  */
 #define D16_16	(D16 + 1)