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amd64: FP: back to static size for allocation and copying

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This commit is contained in:
Sigrid 2020-12-06 19:40:57 +01:00
parent 334c5e1134
commit 97b3291533
3 changed files with 3 additions and 8 deletions
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1
sys/src/9/pc64/dat.h
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@ -241,7 +241,6 @@ struct Mach
u64int dr7; /* shadow copy of dr7 */
u64int xcr0;
u32int fpsavesz;
void* vmx;

4
sys/src/9/pc64/fpu.c
View file

@ -16,7 +16,6 @@ fpuinit(void)
uintptr cr4;
ulong regs[4];
m->fpsavesz = sizeof(FPsave); /* always enough to fit sse+avx */
if((m->cpuiddx & (Sse|Fxsr)) == (Sse|Fxsr)){ /* have sse fp? */
cr4 = getcr4() | CR4Osfxsr|CR4Oxmmex;
putcr4(cr4);
@ -31,9 +30,6 @@ fpuinit(void)
fpsave = fpxsave;
fprestore = fpxrestore;
cpuid(0xd, 0, regs);
m->fpsavesz = regs[1];
cpuid(0xd, 1, regs);
if(regs[0] & Xsaveopt)
fpsave = fpxsaveopt;

6
sys/src/9/pc64/main.c
View file

@ -488,7 +488,7 @@ mathemu(Ureg *ureg, void*)
up->fpstate |= FPkernel;
}
while(up->fpslot[index] == nil)
up->fpslot[index] = mallocalign(m->fpsavesz, FPalign, 0, 0);
up->fpslot[index] = mallocalign(sizeof(FPsave), FPalign, 0, 0);
up->fpsave = up->fpslot[index];
up->fpstate = FPactive | (up->fpstate & (FPnouser|FPkernel|FPindexm));
break;
@ -574,8 +574,8 @@ procfork(Proc *p)
case FPinactive | FPpush:
case FPinactive:
while(p->fpslot[0] == nil)
p->fpslot[0] = mallocalign(m->fpsavesz, FPalign, 0, 0);
memmove(p->fpsave = p->fpslot[0], up->fpslot[0], m->fpsavesz);
p->fpslot[0] = mallocalign(sizeof(FPsave), FPalign, 0, 0);
memmove(p->fpsave = p->fpslot[0], up->fpslot[0], sizeof(FPsave));
p->fpstate = FPinactive;
}
splx(s);