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libphobos: Add D support for RISC-V Linux 

2019-04-23  Iain Buclaw  <ibuclaw@gdcproject.org>

	* configure.tgt: Add riscv*-*-linux* as supported target.
	* libdruntime/gcc/sections/elf_shared.d (getDependencies): Adjust
	dlpi_addr on RISCV32 and RISCV64.
	* src/std/math.d: Add IEEE FPU control support for RISCV.

From-SVN: r270522
This commit is contained in:
Iain Buclaw 2019-04-23 22:53:12 +00:00 committed by Iain Buclaw
parent 1bacd25b0c
commit d9392bfa03
4 changed files with 56 additions and 1 deletions
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7
libphobos/ChangeLog
View File

@ -1,3 +1,10 @@
2019-04-23 Iain Buclaw <ibuclaw@gdcproject.org>
* configure.tgt: Add linux/riscv as supported target.
* libdruntime/gcc/sections/elf_shared.d (getDependencies): Adjust
dlpi_addr on RISCV32 and RISCV64.
* src/std/math.d: Add IEEE FPU control support for RISC-V.
2019-04-23 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
Bernd Edlinger <bernd.edlinger@hotmail.de>
Jakub Jelinek <jakub@redhat.com>

3
libphobos/configure.tgt
View File

@ -29,6 +29,9 @@ case "${target}" in
mips*-*-linux*)
LIBPHOBOS_SUPPORTED=yes
;;
riscv*-*-linux*)
LIBPHOBOS_SUPPORTED=yes
;;
x86_64-*-kfreebsd*-gnu | i?86-*-kfreebsd*-gnu)
LIBPHOBOS_SUPPORTED=yes
;;

14
libphobos/libdruntime/gcc/sections/elf_shared.d
View File

@ -22,6 +22,9 @@
module gcc.sections.elf_shared;
version (RISCV32) version = RISCV_Any;
version (RISCV64) version = RISCV_Any;
version (CRuntime_Glibc) enum SharedELF = true;
else version (CRuntime_Musl) enum SharedELF = true;
else version (FreeBSD) enum SharedELF = true;
@ -723,7 +726,16 @@ version (Shared)
version (CRuntime_Musl)
strtab = cast(const(char)*)(info.dlpi_addr + dyn.d_un.d_ptr); // relocate
else version (linux)
strtab = cast(const(char)*)dyn.d_un.d_ptr;
{
// This might change in future glibc releases (after 2.29) as dynamic sections
// are not required to be read-only on RISC-V. This was copy & pasted from MIPS
// while upstreaming RISC-V support. Otherwise MIPS is the only arch which sets
// in glibc: #define DL_RO_DYN_SECTION 1
version (RISCV_Any)
strtab = cast(const(char)*)(info.dlpi_addr + dyn.d_un.d_ptr); // relocate
else
strtab = cast(const(char)*)dyn.d_un.d_ptr;
}
else version (FreeBSD)
strtab = cast(const(char)*)(info.dlpi_addr + dyn.d_un.d_ptr); // relocate
else version (NetBSD)

33
libphobos/src/std/math.d
View File

@ -4757,6 +4757,15 @@ private:
return result;
}
}
else version (RISCV_Any)
{
uint result = void;
asm pure nothrow @nogc
{
"frflags %0" : "=r" result;
}
return result;
}
else
assert(0, "Not yet supported");
}
@ -4831,6 +4840,14 @@ private:
}
}
}
else version (RISCV_Any)
{
uint newValues = 0x0;
asm pure nothrow @nogc
{
"fsflags %0" : : "r" newValues;
}
}
else
assert(0, "Not yet supported");
}
@ -5423,6 +5440,15 @@ private:
}
return cont;
}
else version (RISCV_Any)
{
ControlState cont;
asm pure nothrow @nogc
{
"frcsr %0" : "=r" cont;
}
return cont;
}
else
assert(0, "Not yet supported");
}
@ -5508,6 +5534,13 @@ private:
}
}
}
else version (RISCV_Any)
{
asm pure nothrow @nogc
{
"fscsr %0" : : "r" (newState);
}
}
else
assert(0, "Not yet supported");
}