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Code Issues Releases Activity

FNSTSW instruction can use AX register as an operand.

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Obtained from:	fenv.h
This commit is contained in:
Jung-uk Kim 2010-07-26 21:24:52 +00:00
parent c3b40fb7bf
commit 2e50fa36a5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=210517
2 changed files with 2 additions and 2 deletions
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2
sys/amd64/amd64/fpu.c
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@ -69,7 +69,7 @@ __FBSDID("$FreeBSD$");
#define fnclex() __asm("fnclex")
#define fninit() __asm("fninit")
#define fnstcw(addr) __asm __volatile("fnstcw %0" : "=m" (*(addr)))
#define fnstsw(addr) __asm __volatile("fnstsw %0" : "=m" (*(addr)))
#define fnstsw(addr) __asm __volatile("fnstsw %0" : "=am" (*(addr)))
#define fxrstor(addr) __asm("fxrstor %0" : : "m" (*(addr)))
#define fxsave(addr) __asm __volatile("fxsave %0" : "=m" (*(addr)))
#define ldmxcsr(r) __asm __volatile("ldmxcsr %0" : : "m" (r))

2
sys/i386/isa/npx.c
View File

@ -92,7 +92,7 @@ __FBSDID("$FreeBSD$");
#define fninit() __asm("fninit")
#define fnsave(addr) __asm __volatile("fnsave %0" : "=m" (*(addr)))
#define fnstcw(addr) __asm __volatile("fnstcw %0" : "=m" (*(addr)))
#define fnstsw(addr) __asm __volatile("fnstsw %0" : "=m" (*(addr)))
#define fnstsw(addr) __asm __volatile("fnstsw %0" : "=am" (*(addr)))
#define fp_divide_by_0() __asm("fldz; fld1; fdiv %st,%st(1); fnop")
#define frstor(addr) __asm("frstor %0" : : "m" (*(addr)))
#ifdef CPU_ENABLE_SSE