mirror of
https://github.com/jart/cosmopolitan.git
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fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
83 lines
3.7 KiB
C
83 lines
3.7 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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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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".balign\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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".balign\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 /* COSMOPOLITAN_LIBC_LOG_COUNTEXPR_H_ */
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