From: Jan Beulich <jbeulich@suse.com>
Date: Tue, 16 Aug 2022 07:11:18 +0000 (+0200)
Subject: revert "x86: Also pass -P to $(CPP) when processing i386-opc.tbl"
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=33b6a20af3854e1aa144fbfca6ff98fccd0ef86d;p=binutils-gdb.git

revert "x86: Also pass -P to $(CPP) when processing i386-opc.tbl"

This reverts commit 384f368958f2a5bb083660e58e5f8a010e6ad429, which
broke i386-gen's emitting of diagnostics. As a replacement to address
the original issue of newer gcc no longer splicing lines when dropping
the line continuation backslashes, switch to using + as the line
continuation character, doing the line splicing in i386-gen.
---

diff --git a/opcodes/Makefile.am b/opcodes/Makefile.am
index af843fb3786..87be5e7edb2 100644
--- a/opcodes/Makefile.am
+++ b/opcodes/Makefile.am
@@ -559,7 +559,7 @@ $(srcdir)/i386-tbl.h: $(srcdir)/i386-init.h
 	@echo $@
 
 $(srcdir)/i386-init.h: @MAINT@ i386-gen$(EXEEXT_FOR_BUILD) i386-opc.tbl i386-reg.tbl i386-opc.h
-	$(CPP) -P $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) - \
+	$(CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) - \
 		< $(srcdir)/i386-opc.tbl \
 		| ./i386-gen$(EXEEXT_FOR_BUILD) --srcdir $(srcdir)
 
diff --git a/opcodes/Makefile.in b/opcodes/Makefile.in
index 2257b0872af..581747edb7b 100644
--- a/opcodes/Makefile.in
+++ b/opcodes/Makefile.in
@@ -1534,7 +1534,7 @@ $(srcdir)/i386-tbl.h: $(srcdir)/i386-init.h
 	@echo $@
 
 $(srcdir)/i386-init.h: @MAINT@ i386-gen$(EXEEXT_FOR_BUILD) i386-opc.tbl i386-reg.tbl i386-opc.h
-	$(CPP) -P $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) - \
+	$(CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) - \
 		< $(srcdir)/i386-opc.tbl \
 		| ./i386-gen$(EXEEXT_FOR_BUILD) --srcdir $(srcdir)
 
diff --git a/opcodes/i386-gen.c b/opcodes/i386-gen.c
index 3390d82f59b..eaeb207e444 100644
--- a/opcodes/i386-gen.c
+++ b/opcodes/i386-gen.c
@@ -1764,17 +1764,36 @@ process_i386_opcodes (FILE *table)
       if (fgets (buf, sizeof (buf), fp) == NULL)
 	break;
 
-      lineno++;
-
       p = remove_leading_whitespaces (buf);
 
-      /* Skip comments.  */
-      str = strstr (p, "//");
-      if (str != NULL)
-	str[0] = '\0';
+      for ( ; ; )
+	{
+	  lineno++;
 
-      /* Remove trailing white spaces.  */
-      remove_trailing_whitespaces (p);
+	  /* Skip comments.  */
+	  str = strstr (p, "//");
+	  if (str != NULL)
+	    {
+	      str[0] = '\0';
+	      remove_trailing_whitespaces (p);
+	      break;
+	    }
+
+	  /* Look for line continuation character.  */
+	  remove_trailing_whitespaces (p);
+	  j = strlen (buf);
+	  if (!j || buf[j - 1] != '+')
+	    break;
+	  if (j >= sizeof (buf) - 1)
+	    fail (_("%s: %d: (continued) line too long\n"), filename, lineno);
+
+	  if (fgets (buf + j - 1, sizeof (buf) - j + 1, fp) == NULL)
+	    {
+	      fprintf (stderr, "%s: Line continuation on last line?\n",
+		       filename);
+	      break;
+	    }
+	}
 
       switch (p[0])
 	{
diff --git a/opcodes/i386-opc.tbl b/opcodes/i386-opc.tbl
index 37704f061ce..12779e651d7 100644
--- a/opcodes/i386-opc.tbl
+++ b/opcodes/i386-opc.tbl
@@ -22,6 +22,11 @@
 #include "i386-opc.h"
 #undef None
 
+// When necessary lines can be split in a non-standard way, by placing a
+// trailing + on a to-be-continued line.  This is intended mainly for non-insn
+// templates.  Insn templates are better kept all on one line to make grep and
+// alike produce useful results.
+
 #define Amd64		ISA64=AMD64
 #define Intel64		ISA64=INTEL64
 #define Intel64Only	ISA64=INTEL64ONLY
@@ -455,7 +460,7 @@ enter, 0xc8, None, Cpu64, DefaultSize|No_bSuf|No_lSuf|No_sSuf|No_ldSuf|NoRex64,
 leave, 0xc9, None, Cpu186|CpuNo64, DefaultSize|No_bSuf|No_sSuf|No_qSuf|No_ldSuf, {}
 leave, 0xc9, None, Cpu64, DefaultSize|No_bSuf|No_lSuf|No_sSuf|No_ldSuf|NoRex64, {}
 
-<cc:opc, o:0, no:1, b:2, c:2, nae:2, nb:3, nc:3, ae:3, e:4, z:4, ne:5, nz:5, be:6, na:6, nbe:7, a:7, \
+<cc:opc, o:0, no:1, b:2, c:2, nae:2, nb:3, nc:3, ae:3, e:4, z:4, ne:5, nz:5, be:6, na:6, nbe:7, a:7, +
          s:8, ns:9, p:a, pe:a, np:b, po:b, l:c, nge:c, nl:d, ge:d, le:e, ng:e, nle:f, g:f>
 
 // Conditional jumps.
@@ -871,9 +876,9 @@ rex.wrxb, 0x4f, None, Cpu64, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf|Is
 
 // Pseudo prefixes (base_opcode == PSEUDO_PREFIX)
 
-<pseudopfx:ident:cpu, disp8:Disp8:0, disp16:Disp16:0, disp32:Disp32:0, \
-                      load:Load:0, store:Store:0, \
-                      vex:VEX:0, vex2:VEX:0, vex3:VEX3:0, evex:EVEX:0, \
+<pseudopfx:ident:cpu, disp8:Disp8:0, disp16:Disp16:0, disp32:Disp32:0, +
+                      load:Load:0, store:Store:0, +
+                      vex:VEX:0, vex2:VEX:0, vex3:VEX3:0, evex:EVEX:0, +
                       rex:REX:Cpu64, nooptimize:NoOptimize:0>
 
 {<pseudopfx>}, PSEUDO_PREFIX, Prefix_<pseudopfx:ident>, <pseudopfx:cpu>, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf|IsPrefix, {}
@@ -962,13 +967,13 @@ pause, 0xf390, None, Cpu186, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, {
 
 // MMX/SSE2 instructions.
 
-<mmx:cpu:pfx:attr:shimm:reg:mem, \
-    $avx:CpuAVX:66:Vex128|VexVVVV|VexW0|SSE2AVX:Vex128|VexVVVV=2|VexW0|SSE2AVX:RegXMM:Xmmword, \
-    $sse:CpuSSE2:66:::RegXMM:Xmmword, \
+<mmx:cpu:pfx:attr:shimm:reg:mem, +
+    $avx:CpuAVX:66:Vex128|VexVVVV|VexW0|SSE2AVX:Vex128|VexVVVV=2|VexW0|SSE2AVX:RegXMM:Xmmword, +
+    $sse:CpuSSE2:66:::RegXMM:Xmmword, +
     $mmx:CpuMMX::NoRex64::RegMMX:Qword>
 
-<sse2:cpu:attr:scal:vvvv:shimm, \
-    $avx:CpuAVX:Vex128|VexW0|SSE2AVX:VexLIG|VexW0|SSE2AVX:VexVVVV:Vex128|VexVVVV=2|VexW0|SSE2AVX, \
+<sse2:cpu:attr:scal:vvvv:shimm, +
+    $avx:CpuAVX:Vex128|VexW0|SSE2AVX:VexLIG|VexW0|SSE2AVX:VexVVVV:Vex128|VexVVVV=2|VexW0|SSE2AVX, +
     $sse:CpuSSE2::NoRex64::>
 
 emms, 0xf77, None, CpuMMX, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, {}
@@ -1052,8 +1057,8 @@ pxor<mmx>, 0x<mmx:pfx>0fef, None, <mmx:cpu>, Modrm|<mmx:attr>|C|No_bSuf|No_wSuf|
 
 // SSE instructions.
 
-<sse:cpu:attr:scal:vvvv, \
-    $avx:CpuAVX:Vex128|VexW0|SSE2AVX:VexLIG|VexW0|SSE2AVX:VexVVVV, \
+<sse:cpu:attr:scal:vvvv, +
+    $avx:CpuAVX:Vex128|VexW0|SSE2AVX:VexLIG|VexW0|SSE2AVX:VexVVVV, +
     $sse:CpuSSE::IgnoreSize:>
 <sse_frel:imm:comm, eq:0:C, lt:1:, le:2:, unord:3:C, neq:4:C, nlt:5:, nle:6:, ord:7:C>
 
@@ -1309,9 +1314,9 @@ invpcid, 0x660f3882, None, CpuINVPCID|Cpu64, Modrm|No_bSuf|No_wSuf|No_lSuf|No_qS
 
 // SSSE3 instructions.
 
-<ssse3:cpu:pfx:attr:vvvv:reg:mem, \
-    $avx:CpuAVX:66:Vex128|VexW0|SSE2AVX:VexVVVV:RegXMM:Xmmword, \
-    $sse:CpuSSSE3:66:::RegXMM:Xmmword, \
+<ssse3:cpu:pfx:attr:vvvv:reg:mem, +
+    $avx:CpuAVX:66:Vex128|VexW0|SSE2AVX:VexVVVV:RegXMM:Xmmword, +
+    $sse:CpuSSSE3:66:::RegXMM:Xmmword, +
     $mmx:CpuSSSE3::NoRex64::RegMMX:Qword>
 
 phaddw<ssse3>, 0x<ssse3:pfx>0f3801, None, <ssse3:cpu>, Modrm|<ssse3:attr>|<ssse3:vvvv>|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { <ssse3:reg>|<ssse3:mem>|Unspecified|BaseIndex, <ssse3:reg> }
@@ -1469,14 +1474,14 @@ gf2p8mulb<gfni>, 0x660f38cf, None, <gfni:cpu>CpuGFNI, Modrm|<gfni:w0>|No_bSuf|No
 
 // AVX instructions.
 
-<avx_frel:imm:comm, eq:00:C, eq_oq:00:C, lt:01:, lt_os:01:, le:02:, le_os:02:, \
-    unord:03:C, unord_q:03:C, neq:04:C, neq_uq:04:C, nlt:05:, nlt_us:05:, \
-    nle:06:, nle_us:06:, ord:07:C, ord_q:07:C, eq_uq:08:C, \
-    nge:09:, nge_us:09:, ngt:0a:, ngt_us:0a:, false:0b:C, false_oq:0b:C, \
-    neq_oq:0c:C, ge:0d:, ge_os:0d:, gt:0e:, gt_os:0e:, true:0f:C, \
-    true_uq:0f:C, eq_os:10:C, lt_oq:11:, le_oq:12:, \
-    unord_s:13:C, neq_us:14:C, nlt_uq:15:, nle_uq:16:, ord_s:17:C, eq_us:18:C, \
-    nge_uq:19:, ngt_uq:1a:, false_os:1b:C, neq_os:1c:C, ge_oq:1d:, gt_oq:1e:, \
+<avx_frel:imm:comm, eq:00:C, eq_oq:00:C, lt:01:, lt_os:01:, le:02:, le_os:02:, +
+    unord:03:C, unord_q:03:C, neq:04:C, neq_uq:04:C, nlt:05:, nlt_us:05:, +
+    nle:06:, nle_us:06:, ord:07:C, ord_q:07:C, eq_uq:08:C, +
+    nge:09:, nge_us:09:, ngt:0a:, ngt_us:0a:, false:0b:C, false_oq:0b:C, +
+    neq_oq:0c:C, ge:0d:, ge_os:0d:, gt:0e:, gt_os:0e:, true:0f:C, +
+    true_uq:0f:C, eq_os:10:C, lt_oq:11:, le_oq:12:, +
+    unord_s:13:C, neq_us:14:C, nlt_uq:15:, nle_uq:16:, ord_s:17:C, eq_us:18:C, +
+    nge_uq:19:, ngt_uq:1a:, false_os:1b:C, neq_os:1c:C, ge_oq:1d:, gt_oq:1e:, +
     true_us:1f:C>
 
 vaddpd, 0x6658, None, CpuAVX, Modrm|Vex|Space0F|VexVVVV=1|VexWIG|CheckRegSize|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { Unspecified|BaseIndex|RegXMM|RegYMM, RegXMM|RegYMM, RegXMM|RegYMM }