diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S | 58 |
1 files changed, 48 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S index 48e9af363d..b4e28b4813 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S @@ -1,5 +1,5 @@ /* Switch to context. - Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 2002, 2004, 2005, 2006, 2008 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -27,6 +27,15 @@ #include "ucontext_i.h" #include <asm/errno.h> + .section ".toc","aw" +.LC__dl_hwcap: +#ifdef SHARED + .tc _rtld_global_ro[TC],_rtld_global_ro +#else + .tc _dl_hwcap[TC],_dl_hwcap +#endif + .section ".text" + #if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4) ENTRY(__novec_setcontext) CALL_MCOUNT 1 @@ -62,10 +71,32 @@ ENTRY(__novec_setcontext) cmpdi r3,0 bne L(nv_error_exit) +# ifdef SHARED +/* Load _rtld-global._dl_hwcap. */ + ld r5,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r5) +# else + ld r5,0(r5) /* Load extern _dl_hwcap. */ +# endif + lfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31) lfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31) lfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31) + +# ifdef _ARCH_PWR6 + /* Use the extended four-operand version of the mtfsf insn. */ + mtfsf 0xff,fp0,1,0 +# else + /* Availability of DFP indicates a 64-bit FPSCR. */ + andi. r6,r5,PPC_FEATURE_HAS_DFP + beq 5f + /* Use the extended four-operand version of the mtfsf insn. */ + mtfsf 0xff,fp0,1,0 + b 6f + /* Continue to operate on the FPSCR as if it were 32-bits. */ +5: mtfsf 0xff,fp0 +6: +# endif /* _ARCH_PWR6 */ lfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r31) lfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r31) lfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r31) @@ -189,15 +220,7 @@ compat_symbol (libc, __novec_setcontext, setcontext, GLIBC_2_3) #endif - .section ".toc","aw" -.LC__dl_hwcap: -#ifdef SHARED - .tc _rtld_global_ro[TC],_rtld_global_ro -#else - .tc _dl_hwcap[TC],_dl_hwcap -#endif .section ".text" - .machine "altivec" ENTRY(__setcontext) CALL_MCOUNT 1 @@ -241,7 +264,7 @@ ENTRY(__setcontext) # else ld r5,0(r5) /* Load extern _dl_hwcap. */ # endif - andis. r5,r5,(PPC_FEATURE_HAS_ALTIVEC >> 16) + andis. r6,r5,(PPC_FEATURE_HAS_ALTIVEC >> 16) beq L(has_no_vec) cmpdi r10,0 @@ -346,7 +369,22 @@ L(has_no_vec): lfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31) lfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31) lfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31) + +# ifdef _ARCH_PWR6 + /* Use the extended four-operand version of the mtfsf insn. */ + mtfsf 0xff,fp0,1,0 +# else + /* Availability of DFP indicates a 64-bit FPSCR. */ + andi. r6,r5,PPC_FEATURE_HAS_DFP + beq 7f + /* Use the extended four-operand version of the mtfsf insn. */ + mtfsf 0xff,fp0,1,0 + b 8f + /* Continue to operate on the FPSCR as if it were 32-bits. */ +7: mtfsf 0xff,fp0 +8: +# endif /* _ARCH_PWR6 */ lfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r31) lfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r31) lfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r31) |