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cf00cc00bc
On 64-bit machines we should not split doubles into two 32 bit integer and handle the words separately. We have wide registers. This patch implements a 64-bit ceil version. Ideally all other functions will be converted over time.
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
#ifndef _MATH_PRIVATE_H
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#define math_opt_barrier(x) \
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({ __typeof(x) __x; \
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if (sizeof (x) <= sizeof (double)) \
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__asm ("" : "=x" (__x) : "0" (x)); \
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else \
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__asm ("" : "=t" (__x) : "0" (x)); \
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__x; })
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#define math_force_eval(x) \
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do \
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{ \
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if (sizeof (x) <= sizeof (double)) \
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__asm __volatile ("" : : "x" (x)); \
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else \
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__asm __volatile ("" : : "f" (x)); \
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} \
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while (0)
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#include <math/math_private.h>
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/* We can do a few things better on x86-64. */
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/* Direct movement of float into integer register. */
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#undef EXTRACT_WORDS64
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#define EXTRACT_WORDS64(i,d) \
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do { \
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long int i_; \
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asm ("movd %1, %0" : "=rm" (i_) : "x" (d)); \
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(i) = i_; \
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} while (0)
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/* And the reverse. */
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#undef INSERT_WORDS64
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#define INSERT_WORDS64(d,i) \
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do { \
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long int i_ = i; \
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asm ("movd %1, %0" : "=x" (d) : "rm" (i_)); \
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} while (0)
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/* Direct movement of float into integer register. */
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#undef GET_FLOAT_WORD
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#define GET_FLOAT_WORD(i,d) \
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do { \
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int i_; \
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asm ("movd %1, %0" : "=rm" (i_) : "x" (d)); \
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(i) = i_; \
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} while (0)
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/* And the reverse. */
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#undef SET_FLOAT_WORD
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#define SET_FLOAT_WORD(d,i) \
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do { \
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int i_ = i; \
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asm ("movd %1, %0" : "=x" (d) : "rm" (i_)); \
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} while (0)
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#endif
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