| npx.c (158996) | npx.c (159027) |
|---|---|
| 1/*- 2 * Copyright (c) 1990 William Jolitz. 3 * Copyright (c) 1991 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: --- 17 unchanged lines hidden (view full) --- 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * from: @(#)npx.c 7.2 (Berkeley) 5/12/91 31 */ 32 33#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1990 William Jolitz. 3 * Copyright (c) 1991 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: --- 17 unchanged lines hidden (view full) --- 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * from: @(#)npx.c 7.2 (Berkeley) 5/12/91 31 */ 32 33#include <sys/cdefs.h> |
| 34__FBSDID("$FreeBSD: head/sys/i386/isa/npx.c 158996 2006-05-28 04:40:45Z davidxu $"); | 34__FBSDID("$FreeBSD: head/sys/i386/isa/npx.c 159027 2006-05-29 02:58:37Z davidxu $"); |
| 35 36#include "opt_cpu.h" 37#include "opt_isa.h" 38#include "opt_npx.h" 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/bus.h> --- 894 unchanged lines hidden (view full) --- 937 intr_restore(s); 938 } else { 939 intr_restore(s); 940 bcopy(addr, &td->td_pcb->pcb_save, sizeof(*addr)); 941 } 942 curthread->td_pcb->pcb_flags |= PCB_NPXINITDONE; 943} 944 | 35 36#include "opt_cpu.h" 37#include "opt_isa.h" 38#include "opt_npx.h" 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/bus.h> --- 894 unchanged lines hidden (view full) --- 937 intr_restore(s); 938 } else { 939 intr_restore(s); 940 bcopy(addr, &td->td_pcb->pcb_save, sizeof(*addr)); 941 } 942 curthread->td_pcb->pcb_flags |= PCB_NPXINITDONE; 943} 944 |
| 945/* 946 * POSIX requires new thread to inherit floating-point environment. 947 */ 948void 949npx_fork_thread(struct thread *td, struct thread *newtd) 950{ 951 union savefpu *state; 952 u_int32_t mxcsr; 953 u_int32_t cw; 954 955 if (!(td->td_pcb->pcb_flags & PCB_NPXINITDONE)) { 956 newtd->td_pcb->pcb_flags &= ~PCB_NPXINITDONE; 957 return; 958 } 959 960 state = &newtd->td_pcb->pcb_save; 961 /* get control word */ 962 if (npxgetregs(td, state)) 963 return; 964 if (cpu_fxsr) { 965 mxcsr = state->sv_xmm.sv_env.en_mxcsr; 966 cw = state->sv_xmm.sv_env.en_cw; 967 } else { 968 cw = state->sv_87.sv_env.en_cw; 969 mxcsr = 0; 970 } 971 bcopy(&npx_cleanstate, state, sizeof(*state)); 972 if (cpu_fxsr) { 973 state->sv_xmm.sv_env.en_cw = cw; 974 state->sv_xmm.sv_env.en_mxcsr = mxcsr; 975 } else 976 state->sv_87.sv_env.en_cw = cw; 977 newtd->td_pcb->pcb_flags |= PCB_NPXINITDONE; 978} 979 | |
| 980static void 981fpusave(addr) 982 union savefpu *addr; 983{ 984 985#ifdef CPU_ENABLE_SSE 986 if (cpu_fxsr) 987 fxsave(addr); --- 159 unchanged lines hidden --- | 945static void 946fpusave(addr) 947 union savefpu *addr; 948{ 949 950#ifdef CPU_ENABLE_SSE 951 if (cpu_fxsr) 952 fxsave(addr); --- 159 unchanged lines hidden --- |