diff options
Diffstat (limited to 'arch/x86/math-emu/poly.h')
| -rw-r--r-- | arch/x86/math-emu/poly.h | 69 |
1 files changed, 31 insertions, 38 deletions
diff --git a/arch/x86/math-emu/poly.h b/arch/x86/math-emu/poly.h index 4db798114923..168eb44c93c8 100644 --- a/arch/x86/math-emu/poly.h +++ b/arch/x86/math-emu/poly.h @@ -21,9 +21,9 @@ allows. 9-byte would probably be sufficient. */ typedef struct { - unsigned long lsw; - unsigned long midw; - unsigned long msw; + unsigned long lsw; + unsigned long midw; + unsigned long msw; } Xsig; asmlinkage void mul64(unsigned long long const *a, unsigned long long const *b, @@ -49,7 +49,6 @@ asmlinkage void div_Xsig(Xsig *x1, const Xsig *x2, const Xsig *dest); /* Macro to access the 8 ms bytes of an Xsig as a long long */ #define XSIG_LL(x) (*(unsigned long long *)&x.midw) - /* Need to run gcc with optimizations on to get these to actually be in-line. @@ -63,59 +62,53 @@ asmlinkage void div_Xsig(Xsig *x1, const Xsig *x2, const Xsig *dest); static inline unsigned long mul_32_32(const unsigned long arg1, const unsigned long arg2) { - int retval; - asm volatile ("mull %2; movl %%edx,%%eax" \ - :"=a" (retval) \ - :"0" (arg1), "g" (arg2) \ - :"dx"); - return retval; + int retval; + asm volatile ("mull %2; movl %%edx,%%eax":"=a" (retval) + :"0"(arg1), "g"(arg2) + :"dx"); + return retval; } - /* Add the 12 byte Xsig x2 to Xsig dest, with no checks for overflow. */ static inline void add_Xsig_Xsig(Xsig *dest, const Xsig *x2) { - asm volatile ("movl %1,%%edi; movl %2,%%esi;\n" - "movl (%%esi),%%eax; addl %%eax,(%%edi);\n" - "movl 4(%%esi),%%eax; adcl %%eax,4(%%edi);\n" - "movl 8(%%esi),%%eax; adcl %%eax,8(%%edi);\n" - :"=g" (*dest):"g" (dest), "g" (x2) - :"ax","si","di"); + asm volatile ("movl %1,%%edi; movl %2,%%esi;\n" + "movl (%%esi),%%eax; addl %%eax,(%%edi);\n" + "movl 4(%%esi),%%eax; adcl %%eax,4(%%edi);\n" + "movl 8(%%esi),%%eax; adcl %%eax,8(%%edi);\n":"=g" + (*dest):"g"(dest), "g"(x2) + :"ax", "si", "di"); } - /* Add the 12 byte Xsig x2 to Xsig dest, adjust exp if overflow occurs. */ /* Note: the constraints in the asm statement didn't always work properly with gcc 2.5.8. Changing from using edi to using ecx got around the problem, but keep fingers crossed! */ static inline void add_two_Xsig(Xsig *dest, const Xsig *x2, long int *exp) { - asm volatile ("movl %2,%%ecx; movl %3,%%esi;\n" - "movl (%%esi),%%eax; addl %%eax,(%%ecx);\n" - "movl 4(%%esi),%%eax; adcl %%eax,4(%%ecx);\n" - "movl 8(%%esi),%%eax; adcl %%eax,8(%%ecx);\n" - "jnc 0f;\n" - "rcrl 8(%%ecx); rcrl 4(%%ecx); rcrl (%%ecx)\n" - "movl %4,%%ecx; incl (%%ecx)\n" - "movl $1,%%eax; jmp 1f;\n" - "0: xorl %%eax,%%eax;\n" - "1:\n" - :"=g" (*exp), "=g" (*dest) - :"g" (dest), "g" (x2), "g" (exp) - :"cx","si","ax"); + asm volatile ("movl %2,%%ecx; movl %3,%%esi;\n" + "movl (%%esi),%%eax; addl %%eax,(%%ecx);\n" + "movl 4(%%esi),%%eax; adcl %%eax,4(%%ecx);\n" + "movl 8(%%esi),%%eax; adcl %%eax,8(%%ecx);\n" + "jnc 0f;\n" + "rcrl 8(%%ecx); rcrl 4(%%ecx); rcrl (%%ecx)\n" + "movl %4,%%ecx; incl (%%ecx)\n" + "movl $1,%%eax; jmp 1f;\n" + "0: xorl %%eax,%%eax;\n" "1:\n":"=g" (*exp), "=g"(*dest) + :"g"(dest), "g"(x2), "g"(exp) + :"cx", "si", "ax"); } - /* Negate (subtract from 1.0) the 12 byte Xsig */ /* This is faster in a loop on my 386 than using the "neg" instruction. */ static inline void negate_Xsig(Xsig *x) { - asm volatile("movl %1,%%esi;\n" - "xorl %%ecx,%%ecx;\n" - "movl %%ecx,%%eax; subl (%%esi),%%eax; movl %%eax,(%%esi);\n" - "movl %%ecx,%%eax; sbbl 4(%%esi),%%eax; movl %%eax,4(%%esi);\n" - "movl %%ecx,%%eax; sbbl 8(%%esi),%%eax; movl %%eax,8(%%esi);\n" - :"=g" (*x):"g" (x):"si","ax","cx"); + asm volatile ("movl %1,%%esi;\n" + "xorl %%ecx,%%ecx;\n" + "movl %%ecx,%%eax; subl (%%esi),%%eax; movl %%eax,(%%esi);\n" + "movl %%ecx,%%eax; sbbl 4(%%esi),%%eax; movl %%eax,4(%%esi);\n" + "movl %%ecx,%%eax; sbbl 8(%%esi),%%eax; movl %%eax,8(%%esi);\n":"=g" + (*x):"g"(x):"si", "ax", "cx"); } #endif /* _POLY_H */ |