From a053e878494080f7070cf92890e546057236c9c9 Mon Sep 17 00:00:00 2001 From: Zack Weinberg Date: Thu, 16 May 2019 13:34:27 -0400 Subject: Remove support for PowerPC SPE extension (powerpc*-*-*gnuspe*). MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit GCC 9 dropped support for the SPE extensions to PowerPC, which means powerpc*-*-*gnuspe* configurations are no longer buildable with that compiler. This ISA extension was peculiar to the “e500” line of embedded PowerPC chips, which, as far as I can tell, are no longer being manufactured, so I think we should follow suit. This patch was developed by grepping for “e500”, “__SPE__”, and “__NO_FPRS__”, and may not eliminate every vestige of SPE support. Most uses of __NO_FPRS__ are left alone, as they are relevant to normal embedded PowerPC with soft-float. * sysdeps/powerpc/preconfigure: Error out on powerpc-*-*gnuspe* host type. * scripts/build-many-glibcs.py: Remove powerpc-*-linux-gnuspe and powerpc-*-linux-gnuspe-e500v1 from list of build configurations. * sysdeps/powerpc/powerpc32/e500: Recursively delete. * sysdeps/unix/sysv/linux/powerpc/powerpc32/e500: Recursively delete. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/context-e500.h: Delete. * sysdeps/powerpc/fpu_control.h: Remove SPE variant. Issue an #error if used with a compiler in SPE-float mode. * sysdeps/powerpc/powerpc32/__longjmp_common.S * sysdeps/powerpc/powerpc32/setjmp_common.S * sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext-common.S * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/getcontext.S * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/setcontext.S * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/swapcontext.S * sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext-common.S * sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext-common.S: Remove code to preserve SPE register state. * sysdeps/unix/sysv/linux/powerpc/elision-lock.c * sysdeps/unix/sysv/linux/powerpc/elision-trylock.c * sysdeps/unix/sysv/linux/powerpc/elision-unlock.c Remove __SPE__ ifndefs. --- sysdeps/powerpc/fpu_control.h | 39 ++++----------------------------------- 1 file changed, 4 insertions(+), 35 deletions(-) (limited to 'sysdeps/powerpc/fpu_control.h') diff --git a/sysdeps/powerpc/fpu_control.h b/sysdeps/powerpc/fpu_control.h index e0c5cf6534..e88d81640d 100644 --- a/sysdeps/powerpc/fpu_control.h +++ b/sysdeps/powerpc/fpu_control.h @@ -19,6 +19,10 @@ #ifndef _FPU_CONTROL_H #define _FPU_CONTROL_H +#if defined __SPE__ || (defined __NO_FPRS__ && !defined _SOFT_FLOAT) +# error "SPE/e500 is no longer supported" +#endif + #ifdef _SOFT_FLOAT # define _FPU_RESERVED 0xffffffff @@ -28,41 +32,6 @@ typedef unsigned int fpu_control_t; # define _FPU_SETCW(cw) (void) (cw) extern fpu_control_t __fpu_control; -#elif defined __NO_FPRS__ /* e500 */ - -/* rounding control */ -# define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */ -# define _FPU_RC_DOWN 0x03 -# define _FPU_RC_UP 0x02 -# define _FPU_RC_ZERO 0x01 - -/* masking of interrupts */ -# define _FPU_MASK_ZM 0x10 /* zero divide */ -# define _FPU_MASK_OM 0x04 /* overflow */ -# define _FPU_MASK_UM 0x08 /* underflow */ -# define _FPU_MASK_XM 0x40 /* inexact */ -# define _FPU_MASK_IM 0x20 /* invalid operation */ - -# define _FPU_RESERVED 0x00c10080 /* These bits are reserved and not changed. */ - -/* Correct IEEE semantics require traps to be enabled at the hardware - level; the kernel then does the emulation and determines whether - generation of signals from those traps was enabled using prctl. */ -# define _FPU_DEFAULT 0x0000003c /* Default value. */ -# define _FPU_IEEE _FPU_DEFAULT - -/* Type of the control word. */ -typedef unsigned int fpu_control_t; - -/* Macros for accessing the hardware control word. */ -# define _FPU_GETCW(cw) \ - __asm__ volatile ("mfspefscr %0" : "=r" (cw)) -# define _FPU_SETCW(cw) \ - __asm__ volatile ("mtspefscr %0" : : "r" (cw)) - -/* Default control word set at startup. */ -extern fpu_control_t __fpu_control; - #else /* PowerPC 6xx floating-point. */ /* rounding control */ -- cgit 1.4.1