diff options
Diffstat (limited to 'libc/sysdeps/x86_64/fpu/math_private.h')
| -rw-r--r-- | libc/sysdeps/x86_64/fpu/math_private.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/libc/sysdeps/x86_64/fpu/math_private.h b/libc/sysdeps/x86_64/fpu/math_private.h index 4febcbb5e..4be753654 100644 --- a/libc/sysdeps/x86_64/fpu/math_private.h +++ b/libc/sysdeps/x86_64/fpu/math_private.h @@ -18,4 +18,41 @@ do \ while (0) #include <math/math_private.h> + +/* We can do a few things better on x86-64. */ + +/* Direct movement of float into integer register. */ +#undef EXTRACT_WORDS64 +#define EXTRACT_WORDS64(i,d) \ +do { \ + long int i_; \ + asm ("movd %1, %0" : "=rm" (i_) : "x" (d)); \ + (i) = i_; \ +} while (0) + +/* And the reverse. */ +#undef INSERT_WORDS64 +#define INSERT_WORDS64(d,i) \ +do { \ + long int i_ = i; \ + asm ("movd %1, %0" : "=x" (d) : "rm" (i_)); \ +} while (0) + +/* Direct movement of float into integer register. */ +#undef GET_FLOAT_WORD +#define GET_FLOAT_WORD(i,d) \ +do { \ + int i_; \ + asm ("movd %1, %0" : "=rm" (i_) : "x" (d)); \ + (i) = i_; \ +} while (0) + +/* And the reverse. */ +#undef SET_FLOAT_WORD +#define SET_FLOAT_WORD(d,i) \ +do { \ + int i_ = i; \ + asm ("movd %1, %0" : "=x" (d) : "rm" (i_)); \ +} while (0) + #endif |