mirror of
https://github.com/jart/cosmopolitan.git
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7b26b42769
This makes breaking changes to add underscores to many non-standard
function names provided by the c library. MODE=tiny is now tinier and
we now use smaller locks that are better for tiny apps in this mode.
Some headers have been renamed to be in the same folder as the build
package, so it'll be easier to know which build dependency is needed.
Certain old misguided interfaces have been removed. Intel intrinsics
headers are now listed in libc/isystem (but not in the amalgamation)
to help further improve open source compatibility. Header complexity
has also been reduced. Lastly, more shell scripts are now available.
Compared to 6f7d0cb1c3, some tiny corrections were made in libc/intrin/g_fds.c and libc/zipos/open.c including double semi colons and incorrect indentation for existing vista changes that were manually pulled from this commit previously.
84 lines
3.8 KiB
C
84 lines
3.8 KiB
C
#ifndef COSMOPOLITAN_LIBC_LOG_COUNTEXPR_H_
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#define COSMOPOLITAN_LIBC_LOG_COUNTEXPR_H_
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#include "libc/macros.internal.h"
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#include "libc/nexgen32e/bench.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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/**
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* Shows nanosecond timings histogram for expr at exit().
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*/
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#define COUNTEXPR(expr) \
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COUNTEXPR_(expr, #expr, STRINGIFY(__FILE__), __LINE__, rdtsc, rdtsc, \
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"COUNTEXPR")
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/**
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* Like COUNTEXPR() but can be used on function calls that return void.
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*/
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#define COUNTSTMT(stmt) \
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(void)COUNTEXPR_((stmt, 0), #stmt, STRINGIFY(__FILE__), __LINE__, rdtsc, \
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rdtsc, "COUNTSTMT")
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/**
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* Same as COUNTEXPR() but uses Intel's expensive measurement technique.
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*/
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#define BENCHEXPR(expr) \
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COUNTEXPR_(expr, #expr, STRINGIFY(__FILE__), __LINE__, __startbench, \
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__endbench, "BENCHEXPR")
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#define COUNTEXPR_(expr, code, file, line, start, stop, macro) \
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COUNTEXPR__(expr, STRINGIFY(code), file, line, start, stop, STRINGIFY(macro))
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#define COUNTEXPR__(expr, code, file, line, start, stop, macro) \
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({ \
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struct countexpr *InfO; \
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uint64_t t1_, t2_, TiCkS, NaNoS; \
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t1_ = start(); \
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asm volatile("" ::: "memory"); \
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autotype(expr) ReS = (expr); \
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asm volatile("" ::: "memory"); \
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t2_ = stop(); \
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TiCkS = t2_ >= t1_ ? t2_ - t1_ : ~t1_ + t2_ + 1; \
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asm(".section .rodata.str1.1,\"aMS\",@progbits,1\n\t" \
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".align\t1\n" \
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"31340:\t.asciz\t" file "\n\t" \
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"31338:\t.asciz\t" code "\n" \
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"31332:\t.asciz\t" macro "\n" \
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".previous\n\t" \
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".section .yoink\n\t" \
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"nopl\tcountexpr_data(%%rip)\n\t" \
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".previous\n\t" \
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".section .sort.data.countexpr.2,\"a\",@progbits\n\t" \
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".align\t8\n31337:\t" \
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".quad\t" #line "\n\t" \
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".quad\t31340b\n\t" \
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".quad\t31338b\n\t" \
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".quad\t31332b\n\t" \
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".rept\t65\n\t" \
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".quad\t0\n\t" \
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".endr\n\t" \
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".previous\n\t" \
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"lea\t31337b(%%rip),%0" \
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: "=r"(InfO)); \
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/* approximation of round(x*.323018) which is usually */ \
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/* the ratio, between x86 rdtsc ticks and nanoseconds */ \
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NaNoS = (TiCkS * 338709) >> 20; \
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++InfO->logos[NaNoS ? bsrl(NaNoS) + 1 : 0]; \
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ReS; \
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})
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struct countexpr {
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long line; /* zero for last entry */
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const char *file;
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const char *code;
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const char *macro;
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long logos[65];
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};
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extern struct countexpr countexpr_data[];
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void countexpr_report(void);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_LOG_COUNTEXPR_H_ */
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