diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S | 58 |
1 files changed, 47 insertions, 11 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S index 936d641b6b..c42ccfbe44 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S @@ -1,5 +1,5 @@ /* Save current context and install the given one. - 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 @@ -27,7 +27,16 @@ #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 + #if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4) + .section ".text" ENTRY(__novec_swapcontext) CALL_MCOUNT 2 #ifdef __ASSUME_NEW_RT_SIGRETURN_SYSCALL @@ -157,10 +166,31 @@ ENTRY(__novec_swapcontext) cmpdi r0,0 bne L(nv_do_sigret) +# ifdef SHARED +/* Load _rtld-global._dl_hwcap. */ + ld r8,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r8) +# else + ld r8,0(r8) /* 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,r8,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) @@ -283,15 +313,7 @@ compat_symbol (libc, __novec_swapcontext, swapcontext, 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(__swapcontext) CALL_MCOUNT 2 @@ -409,7 +431,7 @@ ENTRY(__swapcontext) la r10,(SIGCONTEXT_V_RESERVE+8)(r3) la r9,(SIGCONTEXT_V_RESERVE+24)(r3) - andis. r8,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16) + andis. r6,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16) clrrdi r10,r10,4 beq L(has_no_vec) @@ -540,7 +562,7 @@ L(has_no_vec): # else ld r8,0(r8) /* Load extern _dl_hwcap. */ # endif - andis. r8,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16) + andis. r6,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16) beq L(has_no_vec2) cmpdi r10,0 @@ -646,7 +668,21 @@ L(has_no_vec2): 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,r8,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) |