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gcc-10-mlong-double.patch (9001B)

    

  1. SPDX-FileCopyrightText: 2023 fosslinux <fosslinux@aussies.space>
  2. SPDX-FileCopyrightText: 2012 H.J. Lu <hongjiu.lu@intel.com>
  4. SPDX-License-Identifier: GPL-3.0-or-later
  6. Backport of the commit:
  7. [PATCH] Add -mlong-double-64/-mlong-double-80 to i386
  8. to GCC 4.7.
  10. GCC 10 uses this argument to ensure some files are compiled with long
  11. double length = 80. This is almost universally true for i386, so it
  12. could be patched out; but the use of this flag is rather extensive,
  13. and if removed will break future added architectures anyway, so it
  14. makes more sense to simply add in support to GCC 4.7.
  16. diff --git gcc/config/i386/i386-c.c gcc/config/i386/i386-c.c
  17. index d00e0ba54b939..edd64ff7ae388 100644
  18. --- gcc-4.7.4/gcc/config/i386/i386-c.c
  19. +++ gcc-4.7.4/gcc/config/i386/i386-c.c
  20. @@ -418,6 +418,9 @@
  21.        builtin_define_std ("i386");
  22.      }
  23.  
  24. +  if (TARGET_LONG_DOUBLE_64)
  25. +    cpp_define (parse_in, "__LONG_DOUBLE_64__");
  26. +
  27.    ix86_target_macros_internal (ix86_isa_flags,
  28.  			       ix86_arch,
  29.  			       ix86_tune,
  30. diff --git gcc/config/i386/i386.c gcc/config/i386/i386.c
  31. index a6fc45b047a94..da931ee153745 100644
  32. --- gcc-4.7.4/gcc/config/i386/i386.c
  33. +++ gcc-4.7.4/gcc/config/i386/i386.c
  34. @@ -2786,6 +2786,7 @@ ix86_target_string (HOST_WIDE_INT isa, int flags, const char *arch,
  35.    static struct ix86_target_opts flag_opts[] =
  36.    {
  37.      { "-m128bit-long-double",		MASK_128BIT_LONG_DOUBLE },
  38. +    { "-mlong-double-64",		MASK_LONG_DOUBLE_64 },
  39.      { "-m80387",			MASK_80387 },
  40.      { "-maccumulate-outgoing-args",	MASK_ACCUMULATE_OUTGOING_ARGS },
  41.      { "-malign-double",			MASK_ALIGN_DOUBLE },
  42. @@ -4084,6 +4085,11 @@ ix86_option_override_internal (bool main_args_p)
  43.    else if (target_flags_explicit & MASK_RECIP)
  44.      recip_mask &= ~(RECIP_MASK_ALL & ~recip_mask_explicit);
  45.  
  46. +  /* Default long double to 64-bit for Bionic.  */
  47. +  if (TARGET_HAS_BIONIC
  48. +      && !(target_flags_explicit & MASK_LONG_DOUBLE_64))
  49. +    target_flags |= MASK_LONG_DOUBLE_64;
  50. +
  51.    /* Save the initial options in case the user does function specific
  52.       options.  */
  53.    if (main_args_p)
  54. diff --git gcc/config/i386/i386.h gcc/config/i386/i386.h
  55. index 11f79e3f670af..3a41a43e308bf 100644
  56. --- gcc-4.7.4/gcc/config/i386/i386.h
  57. +++ gcc-4.7.4/gcc/config/i386/i386.h
  58. @@ -671,9 +671,17 @@ enum target_cpu_default
  59.  #define LONG_LONG_TYPE_SIZE 64
  60.  #define FLOAT_TYPE_SIZE 32
  61.  #define DOUBLE_TYPE_SIZE 64
  62. -#define LONG_DOUBLE_TYPE_SIZE 80
  63. +#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_64 ? 64 : 80)
  64.  
  65. -#define WIDEST_HARDWARE_FP_SIZE LONG_DOUBLE_TYPE_SIZE
  66. +/* Define this to set long double type size to use in libgcc2.c, which can
  67. +   not depend on target_flags.  */
  68. +#ifdef __LONG_DOUBLE_64__
  69. +#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
  70. +#else
  71. +#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 80
  72. +#endif
  73. +
  74. +#define WIDEST_HARDWARE_FP_SIZE 80
  75.  
  76.  #if defined (TARGET_BI_ARCH) || TARGET_64BIT_DEFAULT
  77.  #define MAX_BITS_PER_WORD 64
  78. diff --git gcc/config/i386/i386.opt gcc/config/i386/i386.opt
  79. index e4f78f3ce50f3..6a389947d904e 100644
  80. --- gcc-4.7.4/gcc/config/i386/i386.opt
  81. +++ gcc-4.7.4/gcc/config/i386/i386.opt
  82. @@ -86,6 +86,14 @@ m96bit-long-double
  83.  Target RejectNegative Report InverseMask(128BIT_LONG_DOUBLE) Save
  84.  sizeof(long double) is 12
  85.  
  86. +mlong-double-80
  87. +Target Report RejectNegative InverseMask(LONG_DOUBLE_64) Save
  88. +Use 80-bit long double
  89. +
  90. +mlong-double-64
  91. +Target Report RejectNegative Mask(LONG_DOUBLE_64) Save
  92. +Use 64-bit long double
  93. +
  94.  maccumulate-outgoing-args
  95.  Target Report Mask(ACCUMULATE_OUTGOING_ARGS) Save
  96.  Reserve space for outgoing arguments in the function prologue
  97. diff --git gcc/testsuite/gcc.target/i386/long-double-64-1.c gcc/testsuite/gcc.target/i386/long-double-64-1.c
  98. new file mode 100644
  99. index 0000000000000..cf933796f8aea
  100. --- /dev/null
  101. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-64-1.c
  102. @@ -0,0 +1,10 @@
  103. +/* { dg-do compile } */
  104. +/* { dg-options "-O2 -mlong-double-64" } */
  105. +
  106. +long double
  107. +foo (long double x)
  108. +{
  109. +  return x * x;
  110. +}
  111. +
  112. +/* { dg-final { scan-assembler-not "fldt" } } */
  113. diff --git gcc/testsuite/gcc.target/i386/long-double-64-2.c gcc/testsuite/gcc.target/i386/long-double-64-2.c
  114. new file mode 100644
  115. index 0000000000000..ddf4fe656d099
  116. --- /dev/null
  117. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-64-2.c
  118. @@ -0,0 +1,10 @@
  119. +/* { dg-do compile { target *-*-linux* } } */
  120. +/* { dg-options "-O2 -mbionic" } */
  121. +
  122. +long double
  123. +foo (long double x)
  124. +{
  125. +  return x * x;
  126. +}
  127. +
  128. +/* { dg-final { scan-assembler-not "fldt" } } */
  129. diff --git gcc/testsuite/gcc.target/i386/long-double-64-3.c gcc/testsuite/gcc.target/i386/long-double-64-3.c
  130. new file mode 100644
  131. index 0000000000000..e748fab2edd3c
  132. --- /dev/null
  133. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-64-3.c
  134. @@ -0,0 +1,10 @@
  135. +/* { dg-do compile { target *-*-linux* } } */
  136. +/* { dg-options "-O2 -mandroid" } */
  137. +
  138. +long double
  139. +foo (long double x)
  140. +{
  141. +  return x * x;
  142. +}
  143. +
  144. +/* { dg-final { scan-assembler-not "fldt" } } */
  145. diff --git gcc/testsuite/gcc.target/i386/long-double-64-4.c gcc/testsuite/gcc.target/i386/long-double-64-4.c
  146. new file mode 100644
  147. index 0000000000000..d9c25aaec080c
  148. --- /dev/null
  149. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-64-4.c
  150. @@ -0,0 +1,10 @@
  151. +/* { dg-do compile } */
  152. +/* { dg-options "-O2 -mlong-double-80 -mlong-double-64" } */
  153. +
  154. +long double
  155. +foo (long double x)
  156. +{
  157. +  return x * x;
  158. +}
  159. +
  160. +/* { dg-final { scan-assembler-not "fldt" } } */
  161. diff --git gcc/testsuite/gcc.target/i386/long-double-80-1.c gcc/testsuite/gcc.target/i386/long-double-80-1.c
  162. new file mode 100644
  163. index 0000000000000..d3b75a0be21de
  164. --- /dev/null
  165. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-80-1.c
  166. @@ -0,0 +1,10 @@
  167. +/* { dg-do compile } */
  168. +/* { dg-options "-O2 -mlong-double-80" } */
  169. +
  170. +long double
  171. +foo (long double x)
  172. +{
  173. +  return x * x;
  174. +}
  175. +
  176. +/* { dg-final { scan-assembler "fldt" } } */
  177. diff --git gcc/testsuite/gcc.target/i386/long-double-80-2.c gcc/testsuite/gcc.target/i386/long-double-80-2.c
  178. new file mode 100644
  179. index 0000000000000..954dfd15d4271
  180. --- /dev/null
  181. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-80-2.c
  182. @@ -0,0 +1,10 @@
  183. +/* { dg-do compile { target *-*-linux* } } */
  184. +/* { dg-options "-O2 -mlong-double-80 -mbionic" } */
  185. +
  186. +long double
  187. +foo (long double x)
  188. +{
  189. +  return x * x;
  190. +}
  191. +
  192. +/* { dg-final { scan-assembler "fldt" } } */
  193. diff --git gcc/testsuite/gcc.target/i386/long-double-80-3.c gcc/testsuite/gcc.target/i386/long-double-80-3.c
  194. new file mode 100644
  195. index 0000000000000..e0e8365e32c4a
  196. --- /dev/null
  197. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-80-3.c
  198. @@ -0,0 +1,10 @@
  199. +/* { dg-do compile { target *-*-linux* } } */
  200. +/* { dg-options "-O2 -mlong-double-80 -mandroid" } */
  201. +
  202. +long double
  203. +foo (long double x)
  204. +{
  205. +  return x * x;
  206. +}
  207. +
  208. +/* { dg-final { scan-assembler "fldt" } } */
  209. diff --git gcc/testsuite/gcc.target/i386/long-double-80-4.c gcc/testsuite/gcc.target/i386/long-double-80-4.c
  210. new file mode 100644
  211. index 0000000000000..cac2d55bc166c
  212. --- /dev/null
  213. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-80-4.c
  214. @@ -0,0 +1,10 @@
  215. +/* { dg-do compile } */
  216. +/* { dg-options "-O2 -mlong-double-64 -mlong-double-80" } */
  217. +
  218. +long double
  219. +foo (long double x)
  220. +{
  221. +  return x * x;
  222. +}
  223. +
  224. +/* { dg-final { scan-assembler "fldt" } } */
  225. diff --git gcc/testsuite/gcc.target/i386/long-double-80-5.c gcc/testsuite/gcc.target/i386/long-double-80-5.c
  226. new file mode 100644
  227. index 0000000000000..4aa606fd1ba05
  228. --- /dev/null
  229. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-80-5.c
  230. @@ -0,0 +1,10 @@
  231. +/* { dg-do compile } */
  232. +/* { dg-options "-O2 -mlong-double-64" } */
  233. +
  234. +__float80
  235. +foo (__float80 x)
  236. +{
  237. +  return x * x;
  238. +}
  239. +
  240. +/* { dg-final { scan-assembler "fldt" } } */
  241. diff --git gcc/testsuite/gcc.target/i386/long-double-80-6.c gcc/testsuite/gcc.target/i386/long-double-80-6.c
  242. new file mode 100644
  243. index 0000000000000..a395a265942c1
  244. --- /dev/null
  245. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-80-6.c
  246. @@ -0,0 +1,11 @@
  247. +/* { dg-do run } */
  248. +/* { dg-options "-O0 -mlong-double-64 -mfpmath=387" } */
  249. +
  250. +int
  251. +main ()
  252. +{
  253. +  __float80 a = -0.23456789;
  254. +  if ((double) a >= 0)
  255. +    __builtin_abort ();
  256. +  return 0;
  257. +}
  258. diff --git gcc/testsuite/gcc.target/i386/long-double-80-7.c gcc/testsuite/gcc.target/i386/long-double-80-7.c
  259. new file mode 100644
  260. index 0000000000000..9b30fe8856786
  261. --- /dev/null
  262. +++ gcc-4.7.4/gcc/testsuite/gcc.target/i386/long-double-80-7.c
  263. @@ -0,0 +1,13 @@
  264. +/* { dg-do run } */
  265. +/* { dg-options "-O0 -mlong-double-64 -mfpmath=sse" } */
  266. +/* { dg-require-effective-target sse2 } */
  267. +
  268. +#include "sse2-check.h"
  269. +
  270. +static void
  271. +sse2_test (void)
  272. +{
  273. +  __float80 a = -0.23456789;
  274. +  if ((double) a >= 0)
  275. +    __builtin_abort ();
  276. +}
  277. diff --git libgcc/config/i386/t-linux libgcc/config/i386/t-linux
  278. index 29b4c22398346..4f47f7bfa59cf 100644
  279. --- gcc-4.7.4/libgcc/config/i386/t-linux
  280. +++ gcc-4.7.4/libgcc/config/i386/t-linux
  281. @@ -2,3 +2,5 @@
  282.  # Need to support TImode for x86.  Override the settings from
  283.  # t-slibgcc-elf-ver and t-linux
  284.  SHLIB_MAPFILES = libgcc-std.ver $(srcdir)/config/i386/libgcc-glibc.ver
  285. +
  286. +HOST_LIBGCC2_CFLAGS += -mlong-double-80