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live-bootstrap/steps/gcc-4.7.4/patches/gcc-10-mlong-double.patch
fosslinux 6ed2e09f3a Remove the notion of "sys*" 
- This idea originates from very early in the project and was, at the
  time, a very easy way to categorise things.
- Now, it doesn't really make much sense - it is fairly arbitary, often
  occuring when there is a change in kernel, but not from builder-hex0
  to fiwix, and sysb is in reality completely unnecessary.
- In short, the sys* stuff is a bit of a mess that makes the project
  more difficult to understand.
- This puts everything down into one folder and has a manifest file that
  is used to generate the build scripts on the fly rather than using
  coded scripts.
- This is created in the "seed" stage.

stage0-posix -- (calls) --> seed -- (generates) --> main steps

Alongside this change there are a variety of other smaller fixups to the
general structure of the live-bootstrap rootfs.

- Creating a rootfs has become much simpler and is defined as code in
  go.sh. The new structure, for an about-to-be booted system, is

/
-- /steps (direct copy of steps/)
-- /distfiles (direct copy of distfiles/)
-- all files from seed/*
-- all files from seed/stage0-posix/*

- There is no longer such a thing as /usr/include/musl, this didn't
  really make any sense, as musl is the final libc used. Rather, to
  separate musl and mes, we have /usr/include/mes, which is much easier
  to work with.
- This also makes mes easier to blow away later.
- A few things that weren't properly in packages have been changed;
  checksum-transcriber, simple-patch, kexec-fiwix have all been given
  fully qualified package names.
- Highly breaking change, scripts now exist in their package directory
  but NOT WITH THE packagename.sh. Rather, they use pass1.sh, pass2.sh,
  etc. This avoids manual definition of passes.
  - Ditto with patches; default directory is patches, but then any patch
    series specific to a pass are named patches-passX.
2023-12-15 21:43:19 +11:00

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SPDX-FileCopyrightText: 2023 fosslinux <fosslinux@aussies.space>
SPDX-FileCopyrightText: 2012 H.J. Lu <hongjiu.lu@intel.com>
SPDX-License-Identifier: GPL-3.0-or-later
Backport of the commit:
[PATCH] Add -mlong-double-64/-mlong-double-80 to i386
to GCC 4.7.
GCC 10 uses this argument to ensure some files are compiled with long
double length = 80. This is almost universally true for i386, so it
could be patched out; but the use of this flag is rather extensive,
and if removed will break future added architectures anyway, so it
makes more sense to simply add in support to GCC 4.7.
diff --git gcc/config/i386/i386-c.c gcc/config/i386/i386-c.c
index d00e0ba54b939..edd64ff7ae388 100644
--- gcc/config/i386/i386-c.c
+++ gcc/config/i386/i386-c.c
@@ -418,6 +418,9 @@
builtin_define_std ("i386");
}
+ if (TARGET_LONG_DOUBLE_64)
+ cpp_define (parse_in, "__LONG_DOUBLE_64__");
+
ix86_target_macros_internal (ix86_isa_flags,
ix86_arch,
ix86_tune,
diff --git gcc/config/i386/i386.c gcc/config/i386/i386.c
index a6fc45b047a94..da931ee153745 100644
--- gcc/config/i386/i386.c
+++ gcc/config/i386/i386.c
@@ -2786,6 +2786,7 @@ ix86_target_string (HOST_WIDE_INT isa, int flags, const char *arch,
static struct ix86_target_opts flag_opts[] =
{
{ "-m128bit-long-double", MASK_128BIT_LONG_DOUBLE },
+ { "-mlong-double-64", MASK_LONG_DOUBLE_64 },
{ "-m80387", MASK_80387 },
{ "-maccumulate-outgoing-args", MASK_ACCUMULATE_OUTGOING_ARGS },
{ "-malign-double", MASK_ALIGN_DOUBLE },
@@ -4084,6 +4085,11 @@ ix86_option_override_internal (bool main_args_p)
else if (target_flags_explicit & MASK_RECIP)
recip_mask &= ~(RECIP_MASK_ALL & ~recip_mask_explicit);
+ /* Default long double to 64-bit for Bionic. */
+ if (TARGET_HAS_BIONIC
+ && !(target_flags_explicit & MASK_LONG_DOUBLE_64))
+ target_flags |= MASK_LONG_DOUBLE_64;
+
/* Save the initial options in case the user does function specific
options. */
if (main_args_p)
diff --git gcc/config/i386/i386.h gcc/config/i386/i386.h
index 11f79e3f670af..3a41a43e308bf 100644
--- gcc/config/i386/i386.h
+++ gcc/config/i386/i386.h
@@ -671,9 +671,17 @@ enum target_cpu_default
#define LONG_LONG_TYPE_SIZE 64
#define FLOAT_TYPE_SIZE 32
#define DOUBLE_TYPE_SIZE 64
-#define LONG_DOUBLE_TYPE_SIZE 80
+#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_64 ? 64 : 80)
-#define WIDEST_HARDWARE_FP_SIZE LONG_DOUBLE_TYPE_SIZE
+/* Define this to set long double type size to use in libgcc2.c, which can
+ not depend on target_flags. */
+#ifdef __LONG_DOUBLE_64__
+#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
+#else
+#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 80
+#endif
+
+#define WIDEST_HARDWARE_FP_SIZE 80
#if defined (TARGET_BI_ARCH) || TARGET_64BIT_DEFAULT
#define MAX_BITS_PER_WORD 64
diff --git gcc/config/i386/i386.opt gcc/config/i386/i386.opt
index e4f78f3ce50f3..6a389947d904e 100644
--- gcc/config/i386/i386.opt
+++ gcc/config/i386/i386.opt
@@ -86,6 +86,14 @@ m96bit-long-double
Target RejectNegative Report InverseMask(128BIT_LONG_DOUBLE) Save
sizeof(long double) is 12
+mlong-double-80
+Target Report RejectNegative InverseMask(LONG_DOUBLE_64) Save
+Use 80-bit long double
+
+mlong-double-64
+Target Report RejectNegative Mask(LONG_DOUBLE_64) Save
+Use 64-bit long double
+
maccumulate-outgoing-args
Target Report Mask(ACCUMULATE_OUTGOING_ARGS) Save
Reserve space for outgoing arguments in the function prologue
diff --git gcc/testsuite/gcc.target/i386/long-double-64-1.c gcc/testsuite/gcc.target/i386/long-double-64-1.c
new file mode 100644
index 0000000000000..cf933796f8aea
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-64-1.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mlong-double-64" } */
+
+long double
+foo (long double x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler-not "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-64-2.c gcc/testsuite/gcc.target/i386/long-double-64-2.c
new file mode 100644
index 0000000000000..ddf4fe656d099
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-64-2.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -mbionic" } */
+
+long double
+foo (long double x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler-not "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-64-3.c gcc/testsuite/gcc.target/i386/long-double-64-3.c
new file mode 100644
index 0000000000000..e748fab2edd3c
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-64-3.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -mandroid" } */
+
+long double
+foo (long double x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler-not "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-64-4.c gcc/testsuite/gcc.target/i386/long-double-64-4.c
new file mode 100644
index 0000000000000..d9c25aaec080c
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-64-4.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mlong-double-80 -mlong-double-64" } */
+
+long double
+foo (long double x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler-not "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-80-1.c gcc/testsuite/gcc.target/i386/long-double-80-1.c
new file mode 100644
index 0000000000000..d3b75a0be21de
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-80-1.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mlong-double-80" } */
+
+long double
+foo (long double x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-80-2.c gcc/testsuite/gcc.target/i386/long-double-80-2.c
new file mode 100644
index 0000000000000..954dfd15d4271
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-80-2.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -mlong-double-80 -mbionic" } */
+
+long double
+foo (long double x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-80-3.c gcc/testsuite/gcc.target/i386/long-double-80-3.c
new file mode 100644
index 0000000000000..e0e8365e32c4a
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-80-3.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -mlong-double-80 -mandroid" } */
+
+long double
+foo (long double x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-80-4.c gcc/testsuite/gcc.target/i386/long-double-80-4.c
new file mode 100644
index 0000000000000..cac2d55bc166c
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-80-4.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mlong-double-64 -mlong-double-80" } */
+
+long double
+foo (long double x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-80-5.c gcc/testsuite/gcc.target/i386/long-double-80-5.c
new file mode 100644
index 0000000000000..4aa606fd1ba05
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-80-5.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mlong-double-64" } */
+
+__float80
+foo (__float80 x)
+{
+ return x * x;
+}
+
+/* { dg-final { scan-assembler "fldt" } } */
diff --git gcc/testsuite/gcc.target/i386/long-double-80-6.c gcc/testsuite/gcc.target/i386/long-double-80-6.c
new file mode 100644
index 0000000000000..a395a265942c1
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-80-6.c
@@ -0,0 +1,11 @@
+/* { dg-do run } */
+/* { dg-options "-O0 -mlong-double-64 -mfpmath=387" } */
+
+int
+main ()
+{
+ __float80 a = -0.23456789;
+ if ((double) a >= 0)
+ __builtin_abort ();
+ return 0;
+}
diff --git gcc/testsuite/gcc.target/i386/long-double-80-7.c gcc/testsuite/gcc.target/i386/long-double-80-7.c
new file mode 100644
index 0000000000000..9b30fe8856786
--- /dev/null
+++ gcc/testsuite/gcc.target/i386/long-double-80-7.c
@@ -0,0 +1,13 @@
+/* { dg-do run } */
+/* { dg-options "-O0 -mlong-double-64 -mfpmath=sse" } */
+/* { dg-require-effective-target sse2 } */
+
+#include "sse2-check.h"
+
+static void
+sse2_test (void)
+{
+ __float80 a = -0.23456789;
+ if ((double) a >= 0)
+ __builtin_abort ();
+}
diff --git libgcc/config/i386/t-linux libgcc/config/i386/t-linux
index 29b4c22398346..4f47f7bfa59cf 100644
--- libgcc/config/i386/t-linux
+++ libgcc/config/i386/t-linux
@@ -2,3 +2,5 @@
# Need to support TImode for x86. Override the settings from
# t-slibgcc-elf-ver and t-linux
SHLIB_MAPFILES = libgcc-std.ver $(srcdir)/config/i386/libgcc-glibc.ver
+
+HOST_LIBGCC2_CFLAGS += -mlong-double-80
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