Ruby 2.7.0p0(2019-12-25revision647ee6f091eafcce70ffb75ddf7e121e192ab217)

sparc.c
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1 /********************************************************************
2 Flush register windows on sparc.
3
4 This function is in a separate file to prevent inlining. The "flushw"
5 assembler instruction used on sparcv9 flushes all register windows
6 except the current one, so if it is inlined, the current register
7 window of the process executing the instruction will not be flushed
8 correctly.
9
10 See http://bugs.ruby-lang.org/issues/5244 for discussion.
11 *********************************************************************/
12 void
13 rb_sparc_flush_register_windows(void)
14 {
15 /*
16 * gcc doesn't provide "asm" keyword if -ansi and the various -std options
17 * are given.
18 * http://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html
19 */
20 #ifndef __GNUC__
21 #define __asm__ asm
22 #endif
23
24 __asm__
25 #ifdef __GNUC__
26 __volatile__
27 #endif
28
29 /* This condition should be in sync with one in configure.ac */
30 #if defined(__sparcv9) || defined(__sparc_v9__) || defined(__arch64__)
31 # ifdef __GNUC__
32 ("flushw" : : : "%o7")
33 # else
34 ("flushw")
35 # endif /* __GNUC__ */
36 #else
37 ("ta 0x03")
38 #endif
39 ;
40 }
rb_sparc_flush_register_windows
void rb_sparc_flush_register_windows(void)
Definition: sparc.c:13
__asm__
#define __asm__