| /** |
| * This file has no copyright assigned and is placed in the Public Domain. |
| * This file is part of the mingw-w64 runtime package. |
| * No warranty is given; refer to the file DISCLAIMER.PD within this package. |
| */ |
| #include <fenv.h> |
| #include <math.h> |
| #include <errno.h> |
| |
| double |
| modf (double value, double* iptr) |
| { |
| double int_part = 0.0; |
| /* truncate */ |
| #if defined(_AMD64_) || defined(__x86_64__) |
| asm volatile ("subq $8, %%rsp\n" |
| "fnstcw 4(%%rsp)\n" |
| "movzwl 4(%%rsp), %%eax\n" |
| "orb $12, %%ah\n" |
| "movw %%ax, (%%rsp)\n" |
| "fldcw (%%rsp)\n" |
| "frndint\n" |
| "fldcw 4(%%rsp)\n" |
| "addq $8, %%rsp\n" : "=t" (int_part) : "0" (value) : "eax"); /* round */ |
| #elif defined(_X86_) || defined(__i386__) |
| asm volatile ("push %%eax\n\tsubl $8, %%esp\n" |
| "fnstcw 4(%%esp)\n" |
| "movzwl 4(%%esp), %%eax\n" |
| "orb $12, %%ah\n" |
| "movw %%ax, (%%esp)\n" |
| "fldcw (%%esp)\n" |
| "frndint\n" |
| "fldcw 4(%%esp)\n" |
| "addl $8, %%esp\n\tpop %%eax\n" : "=t" (int_part) : "0" (value) : "eax"); /* round */ |
| #else |
| int_part = trunc(value); |
| #endif |
| if (iptr) |
| *iptr = int_part; |
| return (isinf (value) ? 0.0 : value - int_part); |
| } |