patches/gcc/3.4.6/190-all_sh-pr16665-fix.patch
author Michael Hope <michael.hope@linaro.org>
Wed Oct 19 15:27:32 2011 +1300 (2011-10-19)
changeset 2739 f320e22f2cba
parent 402 197e1b49586e
permissions -rw-r--r--
arch: add softfp support

Some architectures support a mixed hard/soft floating point, where
the compiler emits hardware floating point instructions, but passes
the operands in core (aka integer) registers.

For example, ARM supports this mode (to come in the next changeset).

Add support for softfp cross compilers to the GCC and GLIBC
configuration. Needed for Ubuntu and other distros that are softfp.

Signed-off-by: Michael Hope <michael.hope@linaro.org>
[yann.morin.1998@anciens.enib.fr: split the original patch]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
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diff -durN gcc-3.4.6.orig/gcc/config/sh/sh.c gcc-3.4.6/gcc/config/sh/sh.c
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--- gcc-3.4.6.orig/gcc/config/sh/sh.c	2004-09-03 08:51:30.000000000 +0200
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+++ gcc-3.4.6/gcc/config/sh/sh.c	2007-08-15 23:01:48.000000000 +0200
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@@ -9107,6 +9107,15 @@
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     }
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   this = FUNCTION_ARG (cum, Pmode, ptr_type_node, 1);
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+  /* In PIC case, we set PIC register to compute the target address.  We
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+     can use a scratch register to save and restore the original value  
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+     except for SHcompact.  For SHcompact, use stack.  */
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+  if (flag_pic && TARGET_SHCOMPACT)
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+    {
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+      push (PIC_OFFSET_TABLE_REGNUM);
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+      emit_insn (gen_GOTaddr2picreg ());
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+    }
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+
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   /* For SHcompact, we only have r0 for a scratch register: r1 is the
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      static chain pointer (even if you can't have nested virtual functions
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      right now, someone might implement them sometime), and the rest of the
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@@ -9189,8 +9198,24 @@
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       assemble_external (function);
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       TREE_USED (function) = 1;
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     }
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+  /* We can use scratch1 to save and restore the original value of
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+     PIC register except for SHcompact.  */
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+  if (flag_pic && ! TARGET_SHCOMPACT)
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+    {
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+      emit_move_insn (scratch1,
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+		      gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM));
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+      emit_insn (gen_GOTaddr2picreg ());
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+    }
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   funexp = XEXP (DECL_RTL (function), 0);
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   emit_move_insn (scratch2, funexp);
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+  if (flag_pic)
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+    {
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+      if (! TARGET_SHCOMPACT)
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+	emit_move_insn (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM),
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+			scratch1);
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+      else
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+	pop (PIC_OFFSET_TABLE_REGNUM);
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+    }
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   funexp = gen_rtx_MEM (FUNCTION_MODE, scratch2);
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   sibcall = emit_call_insn (gen_sibcall (funexp, const0_rtx, NULL_RTX));
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   SIBLING_CALL_P (sibcall) = 1;