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protobuf/upb/pb/compile_decoder_x64.h

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/*
** This file has been pre-processed with DynASM.
** http://luajit.org/dynasm.html
** DynASM version 1.3.0, DynASM x64 version 1.3.0
** DO NOT EDIT! The original file is in "upb/pb/compile_decoder_x64.dasc".
*/
#if DASM_VERSION != 10300
#error "Version mismatch between DynASM and included encoding engine"
#endif
# 1 "upb/pb/compile_decoder_x64.dasc"
//|//
//|// upb - a minimalist implementation of protocol buffers.
//|//
//|// Copyright (c) 2011-2013 Google Inc. See LICENSE for details.
//|// Author: Josh Haberman <jhaberman@gmail.com>
//|//
//|// JIT compiler for upb_pbdecoder on x86-64. Generates machine code from the
//|// bytecode generated in compile_decoder.c.
//|
//|.arch x64
//|.actionlist upb_jit_actionlist
static const unsigned char upb_jit_actionlist[2158] = {
249,255,248,10,248,1,85,65,87,65,86,65,85,65,84,83,72,137,252,243,73,137,
252,255,72,184,237,237,65,84,73,137,228,72,129,228,239,252,255,208,76,137,
228,65,92,133,192,15,137,244,247,73,137,167,233,72,137,216,77,139,183,233,
73,139,159,233,77,139,167,233,77,139,174,233,73,139,174,233,73,43,175,233,
73,3,175,233,73,139,151,233,72,133,210,15,133,244,248,252,255,208,73,139,
135,233,73,199,135,233,0,0,0,0,248,1,255,91,65,92,65,93,65,94,65,95,93,195,
248,2,73,141,183,233,72,41,212,72,137,231,72,184,237,237,65,84,73,137,228,
72,129,228,239,252,255,208,76,137,228,65,92,195,255,248,11,73,141,191,233,
72,137,230,73,139,151,233,72,41,226,73,137,151,233,137,195,72,184,237,237,
65,84,73,137,228,72,129,228,239,252,255,208,76,137,228,65,92,137,216,73,139,
167,233,91,65,92,65,93,65,94,65,95,93,195,255,248,12,73,57,159,233,15,132,
244,247,73,137,159,233,248,1,77,137,183,233,73,137,159,233,77,137,167,233,
73,137,175,233,73,43,175,233,73,3,175,233,73,137,174,233,77,137,174,233,76,
137,252,255,72,184,237,237,65,84,73,137,228,72,129,228,239,252,255,208,76,
137,228,65,92,252,233,244,11,255,248,13,248,1,77,137,174,233,73,137,159,233,
255,76,57,227,15,132,244,253,255,76,137,225,72,41,217,72,131,252,249,1,15,
130,244,253,255,15,182,19,132,210,15,137,244,254,248,7,232,244,14,248,8,72,
131,195,1,72,137,252,233,72,41,217,72,41,209,15,130,244,15,73,137,142,233,
73,129,198,239,72,137,221,72,1,213,77,59,183,233,15,132,244,249,65,199,134,
233,0,0,0,0,72,133,201,15,132,244,248,77,139,167,233,72,57,252,235,15,135,
244,248,76,57,229,15,135,244,248,255,73,137,252,236,248,2,195,248,3,73,139,
159,233,76,137,252,255,255,72,190,237,237,255,190,237,255,49,252,246,255,
72,184,237,237,65,84,73,137,228,72,129,228,239,252,255,208,76,137,228,65,
92,232,244,12,252,233,244,1,255,248,16,72,131,252,236,16,72,137,188,253,36,
233,248,1,72,199,4,36,0,0,0,0,76,137,252,255,72,137,230,73,137,159,233,77,
137,183,233,73,137,159,233,77,137,167,233,73,137,175,233,73,43,175,233,73,
3,175,233,73,137,174,233,77,137,174,233,252,255,148,253,36,233,77,139,183,
233,73,139,159,233,77,139,167,233,77,139,174,233,73,139,174,233,73,43,175,
233,73,3,175,233,255,133,192,15,137,244,248,72,139,20,36,252,242,15,16,4,
36,72,131,196,16,195,248,2,232,244,11,252,233,244,1,255,248,17,76,137,252,
255,137,214,15,182,209,77,137,183,233,73,137,159,233,77,137,167,233,73,137,
175,233,73,43,175,233,73,3,175,233,73,137,174,233,77,137,174,233,72,184,237,
237,65,84,73,137,228,72,129,228,239,252,255,208,76,137,228,65,92,77,139,183,
233,73,139,159,233,77,139,167,233,77,139,174,233,73,139,174,233,73,43,175,
233,73,3,175,233,129,252,248,239,255,15,133,244,247,195,248,1,129,252,248,
239,15,132,244,247,232,244,11,248,1,49,192,195,255,248,18,248,19,72,191,237,
237,232,244,16,72,131,252,235,4,73,137,159,233,195,255,248,20,248,21,72,191,
237,237,232,244,16,72,131,252,235,8,73,137,159,233,195,255,248,22,248,23,
255,76,57,227,15,132,244,247,255,76,137,225,72,41,217,72,131,252,249,16,15,
130,244,247,255,252,243,15,111,3,102,15,215,192,252,247,208,15,188,192,60,
10,15,131,244,24,72,1,195,195,248,1,72,141,139,233,72,137,216,76,57,225,73,
15,71,204,248,2,72,131,192,1,72,57,200,15,132,244,24,252,246,0,128,15,133,
244,2,248,3,72,137,195,195,255,248,25,72,131,252,236,16,248,1,72,57,252,235,
15,133,244,248,72,131,196,16,49,192,195,248,2,76,137,252,255,72,137,230,77,
137,183,233,73,137,159,233,77,137,167,233,73,137,175,233,73,43,175,233,73,
3,175,233,73,137,174,233,77,137,174,233,72,184,237,237,65,84,73,137,228,72,
129,228,239,252,255,208,76,137,228,65,92,77,139,183,233,73,139,159,233,77,
139,167,233,77,139,174,233,255,73,139,174,233,73,43,175,233,73,3,175,233,
131,252,248,0,15,141,244,249,139,20,36,72,131,196,16,195,248,3,232,244,11,
252,233,244,1,255,248,14,248,26,255,76,57,227,15,132,244,24,255,76,137,225,
72,41,217,72,131,252,249,10,15,130,244,24,255,72,137,223,72,184,237,237,65,
84,73,137,228,72,129,228,239,252,255,208,76,137,228,65,92,72,133,192,15,132,
244,24,72,137,195,72,131,252,235,1,73,137,159,233,195,255,248,24,72,191,237,
237,232,244,16,72,131,252,235,1,73,137,159,233,195,255,248,27,72,131,252,
236,8,72,137,52,36,248,1,76,137,252,255,77,137,183,233,73,137,159,233,77,
137,167,233,73,137,175,233,73,43,175,233,73,3,175,233,73,137,174,233,77,137,
174,233,73,137,159,233,72,184,237,237,65,84,73,137,228,72,129,228,239,252,
255,208,76,137,228,65,92,77,139,183,233,73,139,159,233,77,139,167,233,77,
139,174,233,73,139,174,233,73,43,175,233,255,73,3,175,233,131,252,248,0,15,
141,244,248,72,131,196,8,195,248,2,232,244,11,72,139,52,36,72,57,252,235,
15,133,244,1,184,237,72,131,196,8,195,255,248,28,81,82,72,131,252,236,16,
72,137,252,247,72,137,214,72,137,226,72,184,237,237,65,84,73,137,228,72,129,
228,239,252,255,208,76,137,228,65,92,72,131,196,16,90,89,132,192,15,132,244,
248,72,139,68,36,224,195,248,2,72,49,192,72,252,247,208,195,255,76,57,227,
15,133,244,249,255,76,137,225,72,41,217,72,129,252,249,239,15,131,244,249,
255,248,2,255,232,244,14,255,232,244,26,255,232,244,19,255,232,244,21,255,
252,233,244,250,255,248,3,255,139,19,255,72,139,19,255,252,243,15,16,3,255,
252,242,15,16,3,255,15,182,19,132,210,15,136,244,2,255,248,4,255,137,208,
209,252,234,131,224,1,252,247,216,49,194,255,72,137,208,72,209,252,234,72,
131,224,1,72,252,247,216,72,49,194,255,72,133,210,15,149,210,255,73,137,149,
233,255,65,137,149,233,255,252,242,65,15,17,133,233,255,252,243,65,15,17,
133,233,255,65,136,149,233,255,65,128,141,233,235,255,76,137,252,239,255,
72,184,237,237,65,84,73,137,228,72,129,228,239,252,255,208,76,137,228,65,
92,255,132,192,15,133,244,251,232,244,12,252,233,244,1,248,5,255,72,129,195,
239,255,232,244,22,255,232,244,23,255,232,244,18,255,232,244,20,255,252,246,
3,128,15,133,244,2,255,249,248,1,255,76,57,227,15,132,244,252,255,76,137,
225,72,41,217,72,131,252,249,2,15,130,244,252,255,15,182,19,132,210,15,137,
244,253,15,182,139,233,132,201,15,136,244,252,193,225,7,131,226,127,9,202,
72,131,195,2,252,233,244,254,248,6,232,244,25,133,192,15,133,244,254,195,
248,7,72,131,195,1,248,8,137,209,193,252,234,3,128,225,7,255,248,2,129,252,
250,239,255,15,131,244,253,255,15,131,244,251,255,72,184,237,237,72,139,4,
208,255,72,139,4,213,237,255,248,3,56,200,255,15,133,244,252,255,15,133,244,
251,255,72,193,232,16,72,141,21,244,250,249,248,4,72,1,208,195,248,5,232,
244,17,133,192,15,132,244,1,72,141,5,244,255,195,255,248,6,56,204,15,133,
244,5,72,129,194,239,255,252,233,244,28,255,248,7,255,232,244,28,252,233,
244,3,255,76,57,227,15,133,244,247,255,76,137,225,72,41,217,72,129,252,249,
239,15,131,244,247,255,232,244,27,129,252,248,239,15,132,244,249,129,252,
248,239,15,132,245,252,233,244,251,255,128,59,235,255,102,129,59,238,255,
102,129,59,238,15,133,244,248,128,187,233,235,248,2,255,129,59,239,255,129,
59,239,15,133,244,249,128,187,233,235,255,15,132,244,250,248,3,255,232,245,
72,133,192,15,132,245,252,255,224,255,252,233,245,255,248,4,72,129,195,239,
248,5,255,248,1,76,137,252,239,255,132,192,15,133,244,248,232,244,12,252,
233,244,1,248,2,255,144,255,248,9,255,73,139,151,233,72,184,237,237,65,84,
73,137,228,72,129,228,239,252,255,208,76,137,228,65,92,255,249,249,72,131,
252,236,8,255,72,137,252,234,72,41,218,255,72,133,192,15,133,244,248,232,
244,12,252,233,244,1,248,2,255,73,137,197,255,72,57,252,235,15,132,244,250,
248,1,76,57,227,15,133,244,248,232,244,12,252,233,244,1,248,2,255,72,137,
218,76,137,225,72,41,217,77,139,135,233,72,184,237,237,65,84,73,137,228,72,
129,228,239,252,255,208,76,137,228,65,92,72,1,195,255,76,57,227,15,132,244,
249,232,244,29,248,3,255,76,137,227,255,72,57,252,235,15,133,244,1,248,4,
255,77,137,174,233,73,199,134,233,0,0,0,0,73,129,198,239,77,59,183,233,15,
132,244,15,65,199,134,233,237,255,232,244,13,255,73,129,252,238,239,77,139,
174,233,255,77,139,167,233,73,3,174,233,73,59,175,233,15,130,244,247,76,57,
229,15,135,244,247,73,137,252,236,248,1,255,72,57,221,15,132,245,255,232,
245,255,248,9,72,131,196,8,195,255
};
# 12 "upb/pb/compile_decoder_x64.dasc"
//|.globals UPB_JIT_GLOBAL_
enum {
UPB_JIT_GLOBAL_enterjit,
UPB_JIT_GLOBAL_exitjit,
UPB_JIT_GLOBAL_suspend,
UPB_JIT_GLOBAL_pushlendelim,
UPB_JIT_GLOBAL_decodev32_fallback,
UPB_JIT_GLOBAL_err,
UPB_JIT_GLOBAL_getvalue_slow,
UPB_JIT_GLOBAL_parse_unknown,
UPB_JIT_GLOBAL_skipf32_fallback,
UPB_JIT_GLOBAL_decodef32_fallback,
UPB_JIT_GLOBAL_skipf64_fallback,
UPB_JIT_GLOBAL_decodef64_fallback,
UPB_JIT_GLOBAL_skipv32_fallback,
UPB_JIT_GLOBAL_skipv64_fallback,
UPB_JIT_GLOBAL_decode_varint_slow,
UPB_JIT_GLOBAL_decode_unknown_tag_fallback,
UPB_JIT_GLOBAL_decodev64_fallback,
UPB_JIT_GLOBAL_checktag_fallback,
UPB_JIT_GLOBAL_hashlookup,
UPB_JIT_GLOBAL_strret_fallback,
UPB_JIT_GLOBAL__MAX
};
# 13 "upb/pb/compile_decoder_x64.dasc"
//|.globalnames upb_jit_globalnames
static const char *const upb_jit_globalnames[] = {
"enterjit",
"exitjit",
"suspend",
"pushlendelim",
"decodev32_fallback",
"err",
"getvalue_slow",
"parse_unknown",
"skipf32_fallback",
"decodef32_fallback",
"skipf64_fallback",
"decodef64_fallback",
"skipv32_fallback",
"skipv64_fallback",
"decode_varint_slow",
"decode_unknown_tag_fallback",
"decodev64_fallback",
"checktag_fallback",
"hashlookup",
"strret_fallback",
(const char *)0
};
# 14 "upb/pb/compile_decoder_x64.dasc"
//|
//|// Calling conventions. Note -- this will need to be changed for
//|// Windows, which uses a different calling convention!
//|.define ARG1_64, rdi
//|.define ARG2_8, r6b // DynASM's equivalent to "sil" -- low byte of esi.
//|.define ARG2_32, esi
//|.define ARG2_64, rsi
//|.define ARG3_8, dl
//|.define ARG3_32, edx
//|.define ARG3_64, rdx
//|.define ARG4_64, rcx
//|.define ARG5_64, r8
//|.define XMMARG1, xmm0
//|
//|// Register allocation / type map.
//|// ALL of the code in this file uses these register allocations.
//|// When we "call" within this file, we do not use regular calling
//|// conventions, but of course when calling to user callbacks we must.
//|.define PTR, rbx // DECODER->ptr (unsynced)
//|.define DATAEND, r12 // DECODER->data_end (unsynced)
//|.define CLOSURE, r13 // FRAME->closure (unsynced)
//|.type FRAME, upb_pbdecoder_frame, r14 // DECODER->top (unsynced)
#define Dt1(_V) (int)(ptrdiff_t)&(((upb_pbdecoder_frame *)0)_V)
# 36 "upb/pb/compile_decoder_x64.dasc"
//|.type DECODER, upb_pbdecoder, r15 // DECODER (immutable)
#define Dt2(_V) (int)(ptrdiff_t)&(((upb_pbdecoder *)0)_V)
# 37 "upb/pb/compile_decoder_x64.dasc"
//|.define DELIMEND, rbp
//|
//| // Spills unsynced registers back to memory.
//|.macro commit_regs
//| mov DECODER->top, FRAME
//| mov DECODER->ptr, PTR
//| mov DECODER->data_end, DATAEND
//| // We don't guarantee that delim_end is NULL when out of range like the
//| // interpreter does.
//| mov DECODER->delim_end, DELIMEND
//| sub DELIMEND, DECODER->buf
//| add DELIMEND, DECODER->bufstart_ofs
//| mov FRAME->end_ofs, DELIMEND
//| mov FRAME->sink.closure, CLOSURE
//|.endmacro
//|
//| // Loads unsynced registers from memory back into registers.
//|.macro load_regs
//| mov FRAME, DECODER->top
//| mov PTR, DECODER->ptr
//| mov DATAEND, DECODER->data_end
//| mov CLOSURE, FRAME->sink.closure
//| mov DELIMEND, FRAME->end_ofs
//| sub DELIMEND, DECODER->bufstart_ofs
//| add DELIMEND, DECODER->buf
//|.endmacro
//|
//| // Calls an external C function at address "addr".
//|.macro callp, addr
//| mov64 rax, (uintptr_t)addr
//|
//| // Stack must be 16-byte aligned (x86-64 ABI requires this).
//| //
//| // OPT: possibly remove this by statically ensuring correct alignment.
//| //
//| // OPT: use "call rel32" where possible.
//| push r12
//| mov r12, rsp
//| and rsp, 0xfffffffffffffff0UL // Align stack.
//| call rax
//| mov rsp, r12
//| pop r12
//|.endmacro
//|
//|.macro ld64, val
//|| {
//|| uintptr_t v = (uintptr_t)val;
//|| if (v > 0xffffffff) {
//| mov64 ARG2_64, v
//|| } else if (v) {
//| mov ARG2_32, v
//|| } else {
//| xor ARG2_32, ARG2_32
//|| }
//|| }
//|.endmacro
//|
//|.macro load_handler_data, h, arg
//| ld64 upb_handlers_gethandlerdata(h, arg)
//|.endmacro
//|
//|.macro chkeob, bytes, target
//|| if (bytes == 1) {
//| cmp PTR, DATAEND
//| je target
//|| } else {
//| mov rcx, DATAEND
//| sub rcx, PTR
//| cmp rcx, bytes
//| jb target
//|| }
//|.endmacro
//|
//|.macro chkneob, bytes, target
//|| if (bytes == 1) {
//| cmp PTR, DATAEND
//| jne target
//|| } else {
//| mov rcx, DATAEND
//| sub rcx, PTR
//| cmp rcx, bytes
//| jae target
//|| }
//|.endmacro
//|.macro sethas, reg, hasbit
//|| if (hasbit >= 0) {
//| or byte [reg + ((uint32_t)hasbit / 8)], (1 << ((uint32_t)hasbit % 8))
//|| }
//|.endmacro
//|
//| // Decodes 32-bit varint into rdx, inlining 1 byte.
//|.macro dv32
//| chkeob 1, >7
//| movzx edx, byte [PTR]
//| test dl, dl
//| jns >8
//|7:
//| call ->decodev32_fallback
//|8:
//| add PTR, 1
//|.endmacro
#define DECODE_EOF -3
static upb_func *gethandler(const upb_handlers *h, upb_selector_t sel) {
return h ? upb_handlers_gethandler(h, sel) : NULL;
}
// Defines an "assembly label" for the current code generation offset.
// This label exists *purely* for debugging purposes: it is emitted into
// the .so, and printed as part of JIT debugging output when UPB_JIT_LOAD_SO is
// defined.
//
// We would define this in the .c file except that it conditionally defines a
// pclabel.
static void asmlabel(jitcompiler *jc, const char *fmt, ...) {
#ifndef NDEBUG
int ofs = jc->dynasm->section->ofs;
assert(ofs != jc->lastlabelofs);
jc->lastlabelofs = ofs;
#endif
#ifndef UPB_JIT_LOAD_SO
UPB_UNUSED(jc);
UPB_UNUSED(fmt);
#else
va_list args;
va_start(args, fmt);
char *str = upb_vasprintf(fmt, args);
va_end(args);
int pclabel = alloc_pclabel(jc);
// Normally we would prefer to allocate this inline with the codegen,
// ie.
// |=>asmlabel(...)
// But since we do this conditionally, only when UPB_JIT_LOAD_SO is defined,
// we do it here instead.
//|=>pclabel:
dasm_put(Dst, 0, pclabel);
# 176 "upb/pb/compile_decoder_x64.dasc"
upb_inttable_insert(&jc->asmlabels, pclabel, upb_value_ptr(str));
#endif
}
// Should only be called when the associated handler is known to exist.
static bool alwaysok(const upb_handlers *h, upb_selector_t sel) {
upb_handlerattr attr = UPB_HANDLERATTR_INITIALIZER;
bool ok = upb_handlers_getattr(h, sel, &attr);
UPB_ASSERT_VAR(ok, ok);
bool ret = upb_handlerattr_alwaysok(&attr);
upb_handlerattr_uninit(&attr);
return ret;
}
// Emit static assembly routines; code that does not vary based on the message
// schema. Since it's not input-dependent, we only need one single copy of it.
// For the moment we generate a single copy per generated handlers. Eventually
// we should generate this code at compile time and link it into the binary so
// we have one copy total. To do that we'll want to be sure that it is within
// 2GB of our JIT code, so that branches between the two are near (rel32).
//
// We'd put this assembly in a .s file directly, but DynASM's ability to
// calculate structure offsets automatically is too useful to pass up (it's way
// more convenient to write DECODER->sink than [rbx + 0x96], especially since
// the latter would have to be changed whenever the structure is updated).
static void emit_static_asm(jitcompiler *jc) {
//| // Trampolines for entering/exiting the JIT. These are a bit tricky to
//| // support full resuming; when we suspend we copy the JIT's portion of
//| // the call stack into the upb_pbdecoder and restore it when we resume.
asmlabel(jc, "enterjit");
//|->enterjit:
//|1:
//| push rbp
//| push r15
//| push r14
//| push r13
//| push r12
//| push rbx
//|
//| mov rbx, ARG2_64 // Preserve JIT method.
//|
//| mov DECODER, rdi
//| callp upb_pbdecoder_resume // Same args as us; reuse regs.
//| test eax, eax
//| jns >1
//| mov DECODER->saved_rsp, rsp
//| mov rax, rbx
//| load_regs
//|
//| // Test whether we have a saved stack to resume.
//| mov ARG3_64, DECODER->call_len
//| test ARG3_64, ARG3_64
//| jnz >2
//|
//| call rax
//|
//| mov rax, DECODER->size_param
//| mov qword DECODER->call_len, 0
//|1:
//| pop rbx
dasm_put(Dst, 2, (unsigned int)((uintptr_t)upb_pbdecoder_resume), (unsigned int)(((uintptr_t)upb_pbdecoder_resume)>>32), 0xfffffffffffffff0UL, Dt2(->saved_rsp), Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt1(->sink.closure), Dt1(->end_ofs), Dt2(->bufstart_ofs), Dt2(->buf), Dt2(->call_len), Dt2(->size_param), Dt2(->call_len));
# 236 "upb/pb/compile_decoder_x64.dasc"
//| pop r12
//| pop r13
//| pop r14
//| pop r15
//| pop rbp
//| ret
//|
//|2:
//| // Resume decoder.
//| lea ARG2_64, DECODER->callstack
//| sub rsp, ARG3_64
//| mov ARG1_64, rsp
//| callp memcpy // Restore stack.
//| ret // Return to resumed function (not ->enterjit caller).
//|
//| // Other code can call this to suspend the JIT.
//| // To the calling code, it will appear that the function returns when
//| // the JIT resumes, and more buffer space will be available.
//| // Args: eax=the value that decode() should return.
dasm_put(Dst, 115, Dt2(->callstack), (unsigned int)((uintptr_t)memcpy), (unsigned int)(((uintptr_t)memcpy)>>32), 0xfffffffffffffff0UL);
# 255 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "exitjit");
//|->exitjit:
//| // Save the stack into DECODER->callstack.
//| lea ARG1_64, DECODER->callstack
//| mov ARG2_64, rsp
//| mov ARG3_64, DECODER->saved_rsp
//| sub ARG3_64, rsp
//| mov DECODER->call_len, ARG3_64 // Preserve len for next resume.
//| mov ebx, eax // Preserve return value across memcpy.
//| callp memcpy // Copy stack into decoder.
//| mov eax, ebx // This will be our return value.
//|
//| // Must NOT do this before the memcpy(), otherwise memcpy() will
//| // clobber the stack we are trying to save!
//| mov rsp, DECODER->saved_rsp
//| pop rbx
//| pop r12
//| pop r13
//| pop r14
//| pop r15
//| pop rbp
//| ret
//|
//| // Like suspend() in the C decoder, except that the function appears
//| // (from the caller's perspective) not to return until the decoder is
//| // resumed.
dasm_put(Dst, 161, Dt2(->callstack), Dt2(->saved_rsp), Dt2(->call_len), (unsigned int)((uintptr_t)memcpy), (unsigned int)(((uintptr_t)memcpy)>>32), 0xfffffffffffffff0UL, Dt2(->saved_rsp));
# 281 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "suspend");
//|->suspend:
//| cmp DECODER->ptr, PTR
//| je >1
//| mov DECODER->checkpoint, PTR
//|1:
//| commit_regs
//| mov rdi, DECODER
//| callp upb_pbdecoder_suspend
//| jmp ->exitjit
//|
dasm_put(Dst, 222, Dt2(->ptr), Dt2(->checkpoint), Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt2(->delim_end), Dt2(->buf), Dt2(->bufstart_ofs), Dt1(->end_ofs), Dt1(->sink.closure), (unsigned int)((uintptr_t)upb_pbdecoder_suspend), (unsigned int)(((uintptr_t)upb_pbdecoder_suspend)>>32), 0xfffffffffffffff0UL);
# 292 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "pushlendelim");
//|->pushlendelim:
//|1:
//| mov FRAME->sink.closure, CLOSURE
//| mov DECODER->checkpoint, PTR
//| dv32
dasm_put(Dst, 300, Dt1(->sink.closure), Dt2(->checkpoint));
if (1 == 1) {
dasm_put(Dst, 313);
} else {
dasm_put(Dst, 321);
}
# 298 "upb/pb/compile_decoder_x64.dasc"
//| mov rcx, DELIMEND
//| sub rcx, PTR
//| sub rcx, rdx
//| jb ->err // Len is greater than enclosing message.
//| mov FRAME->end_ofs, rcx
//| add FRAME, sizeof(upb_pbdecoder_frame)
//| mov DELIMEND, PTR
//| add DELIMEND, rdx
//| cmp FRAME, DECODER->limit
//| je >3 // Stack overflow
//| mov dword FRAME->groupnum, 0
//| test rcx, rcx
//| jz >2
//| mov DATAEND, DECODER->end
//| cmp PTR, DELIMEND
//| ja >2
//| cmp DELIMEND, DATAEND
//| ja >2
//| mov DATAEND, DELIMEND // If DELIMEND >= PTR && DELIMEND < DATAEND
dasm_put(Dst, 337, Dt1(->end_ofs), sizeof(upb_pbdecoder_frame), Dt2(->limit), Dt1(->groupnum), Dt2(->end));
# 317 "upb/pb/compile_decoder_x64.dasc"
//|2:
//| ret
//|3:
//| // Error -- call seterr.
//| mov PTR, DECODER->checkpoint // Rollback to before the delim len.
//| // Prepare seterr args.
//| mov ARG1_64, DECODER
//| ld64 kPbDecoderStackOverflow
dasm_put(Dst, 428, Dt2(->checkpoint));
{
uintptr_t v = (uintptr_t)kPbDecoderStackOverflow;
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 325 "upb/pb/compile_decoder_x64.dasc"
//| callp upb_pbdecoder_seterr
//| call ->suspend
//| jmp <1
//|
//| // For getting a value that spans a buffer seam. Falls back to C.
//| // Args: rdi=C decoding function (prototype: int f(upb_pbdecoder*, void*))
dasm_put(Dst, 458, (unsigned int)((uintptr_t)upb_pbdecoder_seterr), (unsigned int)(((uintptr_t)upb_pbdecoder_seterr)>>32), 0xfffffffffffffff0UL);
# 331 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "getvalue_slow");
//|->getvalue_slow:
//| sub rsp, 16 // Stack is [8-byte value, 8-byte func pointer]
//| mov [rsp + 8], rdi // Need to preserve fptr across suspends.
//|1:
//| mov qword [rsp], 0 // For parsing routines that only parse 32 bits.
//| mov ARG1_64, DECODER
//| mov ARG2_64, rsp
//| mov DECODER->checkpoint, PTR
//| commit_regs
//| call aword [rsp + 8]
//| load_regs
//| test eax, eax
dasm_put(Dst, 487, 8, Dt2(->checkpoint), Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt2(->delim_end), Dt2(->buf), Dt2(->bufstart_ofs), Dt1(->end_ofs), Dt1(->sink.closure), 8, Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt1(->sink.closure), Dt1(->end_ofs), Dt2(->bufstart_ofs), Dt2(->buf));
# 344 "upb/pb/compile_decoder_x64.dasc"
//| jns >2
//| // Success; return parsed data (in rdx AND xmm0).
//| mov rdx, [rsp]
//| movsd xmm0, qword [rsp]
//| add rsp, 16
//| ret
//|2:
//| call ->exitjit // Return eax from decode function.
//| jmp <1
//|
dasm_put(Dst, 588);
# 354 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "parse_unknown");
//| // Args: edx=fieldnum, cl=wire type
//|->parse_unknown:
//| // OPT: handle directly instead of kicking to C.
//| // Check for ENDGROUP.
//| mov ARG1_64, DECODER
//| mov ARG2_32, edx
//| movzx ARG3_32, cl
//| commit_regs
//| callp upb_pbdecoder_skipunknown
//| load_regs
//| cmp eax, DECODE_ENDGROUP
//| jne >1
dasm_put(Dst, 619, Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt2(->delim_end), Dt2(->buf), Dt2(->bufstart_ofs), Dt1(->end_ofs), Dt1(->sink.closure), (unsigned int)((uintptr_t)upb_pbdecoder_skipunknown), (unsigned int)(((uintptr_t)upb_pbdecoder_skipunknown)>>32), 0xfffffffffffffff0UL, Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt1(->sink.closure), Dt1(->end_ofs), Dt2(->bufstart_ofs), Dt2(->buf), DECODE_ENDGROUP);
# 367 "upb/pb/compile_decoder_x64.dasc"
//| ret // Return eax=DECODE_ENDGROUP, not zero
//|1:
//| cmp eax, DECODE_OK
//| je >1
//| call ->exitjit // Return eax from decode function.
//|1:
//| xor eax, eax
//| ret
//|
//| // Fallback functions for parsing single values. These are used when the
//| // buffer doesn't contain enough remaining data for the fast path. Each
//| // primitive type (v32, v64, f32, f64) has two functions: decode & skip.
//| // Decode functions return their value in rsi/esi.
//| //
//| // These functions leave PTR = value_end - fast_path_bytes, so that we can
//| // re-join the fast path which will add fast_path_bytes after the callback
//| // completes. We also set DECODER->ptr to this value which is a signal to
//| // ->suspend that DECODER->checkpoint is up to date.
dasm_put(Dst, 716, DECODE_OK);
# 385 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "skip_decode_f32_fallback");
//|->skipf32_fallback:
//|->decodef32_fallback:
//| mov64 rdi, (uintptr_t)upb_pbdecoder_decode_f32
//| call ->getvalue_slow
//| sub PTR, 4
//| mov DECODER->ptr, PTR
//| ret
//|
dasm_put(Dst, 740, (unsigned int)((uintptr_t)upb_pbdecoder_decode_f32), (unsigned int)(((uintptr_t)upb_pbdecoder_decode_f32)>>32), Dt2(->ptr));
# 394 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "skip_decode_f64_fallback");
//|->skipf64_fallback:
//|->decodef64_fallback:
//| mov64 rdi, (uintptr_t)upb_pbdecoder_decode_f64
//| call ->getvalue_slow
//| sub PTR, 8
//| mov DECODER->ptr, PTR
//| ret
//|
//| // Called for varint >= 1 byte.
dasm_put(Dst, 762, (unsigned int)((uintptr_t)upb_pbdecoder_decode_f64), (unsigned int)(((uintptr_t)upb_pbdecoder_decode_f64)>>32), Dt2(->ptr));
# 404 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "skip_decode_v32_fallback");
//|->skipv32_fallback:
//|->skipv64_fallback:
//| chkeob 16, >1
dasm_put(Dst, 784);
if (16 == 1) {
dasm_put(Dst, 789);
} else {
dasm_put(Dst, 797);
}
# 408 "upb/pb/compile_decoder_x64.dasc"
//| // With at least 16 bytes left, we can do a branch-less SSE version.
//| movdqu xmm0, [PTR]
//| pmovmskb eax, xmm0 // bits 0-15 are continuation bits, 16-31 are 0.
//| not eax
//| bsf eax, eax
//| cmp al, 10
//| jae ->decode_varint_slow // Error (>10 byte varint).
//| add PTR, rax // bsf result is 0-based, so PTR=end-1, as desired.
//| ret
//|
//|1:
//| // With fewer than 16 bytes, we have to read byte by byte.
//| lea rcx, [PTR + 10]
//| mov rax, PTR // Preserve PTR in case of fallback to slow path.
//| cmp rcx, DATAEND
//| cmova rcx, DATAEND // rax = MIN(DATAEND, PTR + 10)
//|2:
//| add rax, 1
//| cmp rax, rcx
//| je ->decode_varint_slow
//| test byte [rax], 0x80
//| jnz <2
//|3:
//| mov PTR, rax // PTR = varint_end - 1, as desired
//| ret
//|
//| // Returns tag in edx
dasm_put(Dst, 813, 10);
# 435 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "decode_unknown_tag_fallback");
//|->decode_unknown_tag_fallback:
//| sub rsp, 16
//|1:
//| cmp PTR, DELIMEND
//| jne >2
//| add rsp, 16
//| xor eax, eax
//| ret
//|2:
//| // OPT: Have a medium-fast path before falling back to _slow.
//| mov ARG1_64, DECODER
//| mov ARG2_64, rsp
//| commit_regs
//| callp upb_pbdecoder_decode_varint_slow
//| load_regs
dasm_put(Dst, 882, Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt2(->delim_end), Dt2(->buf), Dt2(->bufstart_ofs), Dt1(->end_ofs), Dt1(->sink.closure), (unsigned int)((uintptr_t)upb_pbdecoder_decode_varint_slow), (unsigned int)(((uintptr_t)upb_pbdecoder_decode_varint_slow)>>32), 0xfffffffffffffff0UL, Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt1(->sink.closure));
# 451 "upb/pb/compile_decoder_x64.dasc"
//| cmp eax, 0
//| jge >3
//| mov edx, [rsp] // Success; return parsed data.
//| add rsp, 16
//| ret
//|3:
//| call ->exitjit // Return eax from decode function.
//| jmp <1
//|
//| // Called for varint >= 1 byte.
dasm_put(Dst, 985, Dt1(->end_ofs), Dt2(->bufstart_ofs), Dt2(->buf));
# 461 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "decode_v32_v64_fallback");
//|->decodev32_fallback:
//|->decodev64_fallback:
//| chkeob 10, ->decode_varint_slow
dasm_put(Dst, 1023);
if (10 == 1) {
dasm_put(Dst, 1028);
} else {
dasm_put(Dst, 1036);
}
# 465 "upb/pb/compile_decoder_x64.dasc"
//| // OPT: do something faster than just calling the C version.
//| mov rdi, PTR
//| callp upb_vdecode_fast
//| test rax, rax
//| je ->decode_varint_slow // Unterminated varint.
//| mov PTR, rax
//| sub PTR, 1
//| mov DECODER->ptr, PTR
//| ret
//|
dasm_put(Dst, 1052, (unsigned int)((uintptr_t)upb_vdecode_fast), (unsigned int)(((uintptr_t)upb_vdecode_fast)>>32), 0xfffffffffffffff0UL, Dt2(->ptr));
# 475 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "decode_varint_slow");
//|->decode_varint_slow:
//| // Slow path: end of buffer or error (varint length >= 10).
//| mov64 rdi, (uintptr_t)upb_pbdecoder_decode_varint_slow
//| call ->getvalue_slow
//| sub PTR, 1
//| mov DECODER->ptr, PTR
//| ret
//|
//| // Args: rsi=expected tag, return=rax (DECODE_{OK,MISMATCH})
dasm_put(Dst, 1097, (unsigned int)((uintptr_t)upb_pbdecoder_decode_varint_slow), (unsigned int)(((uintptr_t)upb_pbdecoder_decode_varint_slow)>>32), Dt2(->ptr));
# 485 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "checktag_fallback");
//|->checktag_fallback:
//| sub rsp, 8
//| mov [rsp], rsi // Preserve expected tag.
//|1:
//| mov ARG1_64, DECODER
//| commit_regs
//| mov DECODER->checkpoint, PTR
//| callp upb_pbdecoder_checktag_slow
//| load_regs
dasm_put(Dst, 1117, Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt2(->delim_end), Dt2(->buf), Dt2(->bufstart_ofs), Dt1(->end_ofs), Dt1(->sink.closure), Dt2(->checkpoint), (unsigned int)((uintptr_t)upb_pbdecoder_checktag_slow), (unsigned int)(((uintptr_t)upb_pbdecoder_checktag_slow)>>32), 0xfffffffffffffff0UL, Dt2(->top), Dt2(->ptr), Dt2(->data_end), Dt1(->sink.closure), Dt1(->end_ofs), Dt2(->bufstart_ofs));
# 495 "upb/pb/compile_decoder_x64.dasc"
//| cmp eax, 0
//| jge >2
//| add rsp, 8
//| ret
//|2:
//| call ->exitjit
//| mov rsi, [rsp]
//| cmp PTR, DELIMEND
//| jne <1
//| mov eax, DECODE_EOF
//| add rsp, 8
//| ret
//|
//| // Args: rsi=upb_inttable, rdx=key, return=rax (-1 if not found).
//| // Preserves: rcx, rdx
//| // OPT: Could write this in assembly if it's a hotspot.
dasm_put(Dst, 1216, Dt2(->buf), DECODE_EOF);
# 511 "upb/pb/compile_decoder_x64.dasc"
asmlabel(jc, "hashlookup");
//|->hashlookup:
//| push rcx
//| push rdx
//| sub rsp, 16
//| mov rdi, rsi
//| mov rsi, rdx
//| mov rdx, rsp
//| callp upb_inttable_lookup
//| add rsp, 16
//| pop rdx
//| pop rcx
//| test al, al
//| jz >2 // Unknown field.
//| mov rax, [rsp-32] // Value from table.
//| ret
//|2:
//| xor rax, rax
//| not rax
//| ret
dasm_put(Dst, 1258, (unsigned int)((uintptr_t)upb_inttable_lookup), (unsigned int)(((uintptr_t)upb_inttable_lookup)>>32), 0xfffffffffffffff0UL);
# 531 "upb/pb/compile_decoder_x64.dasc"
}
static void jitprimitive(jitcompiler *jc, opcode op,
const upb_handlers *h, upb_selector_t sel) {
typedef enum { V32, V64, F32, F64, X } valtype_t;
static valtype_t types[] = {
X, F64, F32, V64, V64, V32, F64, F32, V64, X, X, X, X, V32, V32, F32, F64,
V32, V64 };
static char fastpath_bytes[] = { 1, 1, 4, 8 };
const valtype_t type = types[op];
const int fastbytes = fastpath_bytes[type];
upb_func *handler = gethandler(h, sel);
if (handler) {
//|1:
//| chkneob fastbytes, >3
dasm_put(Dst, 112);
if (fastbytes == 1) {
dasm_put(Dst, 1327);
} else {
dasm_put(Dst, 1335, fastbytes);
}
# 547 "upb/pb/compile_decoder_x64.dasc"
//|2:
dasm_put(Dst, 1351);
# 548 "upb/pb/compile_decoder_x64.dasc"
switch (type) {
case V32:
//| call ->decodev32_fallback
dasm_put(Dst, 1354);
# 551 "upb/pb/compile_decoder_x64.dasc"
break;
case V64:
//| call ->decodev64_fallback
dasm_put(Dst, 1358);
# 554 "upb/pb/compile_decoder_x64.dasc"
break;
case F32:
//| call ->decodef32_fallback
dasm_put(Dst, 1362);
# 557 "upb/pb/compile_decoder_x64.dasc"
break;
case F64:
//| call ->decodef64_fallback
dasm_put(Dst, 1366);
# 560 "upb/pb/compile_decoder_x64.dasc"
break;
case X: break;
}
//| jmp >4
dasm_put(Dst, 1370);
# 564 "upb/pb/compile_decoder_x64.dasc"
// Fast path decode; for when check_bytes bytes are available.
//|3:
dasm_put(Dst, 1375);
# 567 "upb/pb/compile_decoder_x64.dasc"
switch (op) {
case OP_PARSE_SFIXED32:
case OP_PARSE_FIXED32:
//| mov edx, dword [PTR]
dasm_put(Dst, 1378);
# 571 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_PARSE_SFIXED64:
case OP_PARSE_FIXED64:
//| mov rdx, qword [PTR]
dasm_put(Dst, 1381);
# 575 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_PARSE_FLOAT:
//| movss xmm0, dword [PTR]
dasm_put(Dst, 1385);
# 578 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_PARSE_DOUBLE:
//| movsd xmm0, qword [PTR]
dasm_put(Dst, 1391);
# 581 "upb/pb/compile_decoder_x64.dasc"
break;
default:
// Inline one byte of varint decoding.
//| movzx edx, byte [PTR]
//| test dl, dl
//| js <2 // Fallback to slow path for >1 byte varint.
dasm_put(Dst, 1397);
# 587 "upb/pb/compile_decoder_x64.dasc"
break;
}
// Second-stage decode; used for both fast and slow paths
// (only needed for a few types).
//|4:
dasm_put(Dst, 1407);
# 593 "upb/pb/compile_decoder_x64.dasc"
switch (op) {
case OP_PARSE_SINT32:
// 32-bit zig-zag decode.
//| mov eax, edx
//| shr edx, 1
//| and eax, 1
//| neg eax
//| xor edx, eax
dasm_put(Dst, 1410);
# 601 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_PARSE_SINT64:
// 64-bit zig-zag decode.
//| mov rax, rdx
//| shr rdx, 1
//| and rax, 1
//| neg rax
//| xor rdx, rax
dasm_put(Dst, 1424);
# 609 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_PARSE_BOOL:
//| test rdx, rdx
//| setne dl
dasm_put(Dst, 1443);
# 613 "upb/pb/compile_decoder_x64.dasc"
break;
default: break;
}
// Call callback (or specialize if we can).
upb_fieldtype_t type;
const upb_shim_data *data = upb_shim_getdata(h, sel, &type);
if (data) {
switch (type) {
case UPB_TYPE_INT64:
case UPB_TYPE_UINT64:
//| mov [CLOSURE + data->offset], rdx
dasm_put(Dst, 1450, data->offset);
# 625 "upb/pb/compile_decoder_x64.dasc"
break;
case UPB_TYPE_INT32:
case UPB_TYPE_UINT32:
case UPB_TYPE_ENUM:
//| mov [CLOSURE + data->offset], edx
dasm_put(Dst, 1455, data->offset);
# 630 "upb/pb/compile_decoder_x64.dasc"
break;
case UPB_TYPE_DOUBLE:
//| movsd qword [CLOSURE + data->offset], XMMARG1
dasm_put(Dst, 1460, data->offset);
# 633 "upb/pb/compile_decoder_x64.dasc"
break;
case UPB_TYPE_FLOAT:
//| movss dword [CLOSURE + data->offset], XMMARG1
dasm_put(Dst, 1468, data->offset);
# 636 "upb/pb/compile_decoder_x64.dasc"
break;
case UPB_TYPE_BOOL:
//| mov [CLOSURE + data->offset], dl
dasm_put(Dst, 1476, data->offset);
# 639 "upb/pb/compile_decoder_x64.dasc"
break;
case UPB_TYPE_STRING:
case UPB_TYPE_BYTES:
case UPB_TYPE_MESSAGE:
assert(false); break;
}
//| sethas CLOSURE, data->hasbit
if (data->hasbit >= 0) {
dasm_put(Dst, 1481, ((uint32_t)data->hasbit / 8), (1 << ((uint32_t)data->hasbit % 8)));
}
# 646 "upb/pb/compile_decoder_x64.dasc"
} else if (handler) {
//| mov ARG1_64, CLOSURE
//| load_handler_data h, sel
dasm_put(Dst, 1487);
{
uintptr_t v = (uintptr_t)upb_handlers_gethandlerdata(h, sel);
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 649 "upb/pb/compile_decoder_x64.dasc"
//| callp handler
dasm_put(Dst, 1492, (unsigned int)((uintptr_t)handler), (unsigned int)(((uintptr_t)handler)>>32), 0xfffffffffffffff0UL);
# 650 "upb/pb/compile_decoder_x64.dasc"
if (!alwaysok(h, sel)) {
//| test al, al
//| jnz >5
//| call ->suspend
//| jmp <1
//|5:
dasm_put(Dst, 1514);
# 656 "upb/pb/compile_decoder_x64.dasc"
}
}
// We do this last so that the checkpoint is not advanced past the user's
// data until the callback has returned success.
//| add PTR, fastbytes
dasm_put(Dst, 1530, fastbytes);
# 662 "upb/pb/compile_decoder_x64.dasc"
} else {
// No handler registered for this value, just skip it.
//| chkneob fastbytes, >3
if (fastbytes == 1) {
dasm_put(Dst, 1327);
} else {
dasm_put(Dst, 1335, fastbytes);
}
# 665 "upb/pb/compile_decoder_x64.dasc"
//|2:
dasm_put(Dst, 1351);
# 666 "upb/pb/compile_decoder_x64.dasc"
switch (type) {
case V32:
//| call ->skipv32_fallback
dasm_put(Dst, 1535);
# 669 "upb/pb/compile_decoder_x64.dasc"
break;
case V64:
//| call ->skipv64_fallback
dasm_put(Dst, 1539);
# 672 "upb/pb/compile_decoder_x64.dasc"
break;
case F32:
//| call ->skipf32_fallback
dasm_put(Dst, 1543);
# 675 "upb/pb/compile_decoder_x64.dasc"
break;
case F64:
//| call ->skipf64_fallback
dasm_put(Dst, 1547);
# 678 "upb/pb/compile_decoder_x64.dasc"
break;
case X: break;
}
// Fast-path skip.
//|3:
dasm_put(Dst, 1375);
# 684 "upb/pb/compile_decoder_x64.dasc"
if (type == V32 || type == V64) {
//| test byte [PTR], 0x80
//| jnz <2
dasm_put(Dst, 1551);
# 687 "upb/pb/compile_decoder_x64.dasc"
}
//| add PTR, fastbytes
dasm_put(Dst, 1530, fastbytes);
# 689 "upb/pb/compile_decoder_x64.dasc"
}
}
static void jitdispatch(jitcompiler *jc,
const upb_pbdecodermethod *method) {
// Lots of room for tweaking/optimization here.
const upb_inttable *dispatch = &method->dispatch;
bool has_hash_entries = (dispatch->t.count > 0);
// Whether any of the fields for this message can have two wire types which
// are both valid (packed & non-packed).
//
// OPT: populate this more precisely; not all messages with hash entries have
// this characteristic.
bool has_multi_wiretype = has_hash_entries;
//|=>define_jmptarget(jc, &method->dispatch):
//|1:
dasm_put(Dst, 1560, define_jmptarget(jc, &method->dispatch));
# 708 "upb/pb/compile_decoder_x64.dasc"
// Decode the field tag.
//| mov aword DECODER->checkpoint, PTR
//| chkeob 2, >6
dasm_put(Dst, 308, Dt2(->checkpoint));
if (2 == 1) {
dasm_put(Dst, 1564);
} else {
dasm_put(Dst, 1572);
}
# 711 "upb/pb/compile_decoder_x64.dasc"
//| movzx edx, byte [PTR]
//| test dl, dl
//| jns >7 // Jump if first byte has no continuation bit.
//| movzx ecx, byte [PTR + 1]
//| test cl, cl
//| js >6 // Jump if second byte has continuation bit.
//| // Confirmed two-byte varint.
//| shl ecx, 7
//| and edx, 0x7f
//| or edx, ecx
//| add PTR, 2
//| jmp >8
//|6:
//| call ->decode_unknown_tag_fallback
//| test eax, eax // Hit DELIMEND?
//| jnz >8
//| ret
//|7:
//| add PTR, 1
//|8:
//| mov ecx, edx
//| shr edx, 3
//| and cl, 7
dasm_put(Dst, 1588, 1);
# 734 "upb/pb/compile_decoder_x64.dasc"
// See comment attached to upb_pbdecodermethod.dispatch for layout of the
// dispatch table.
//|2:
//| cmp edx, dispatch->array_size
dasm_put(Dst, 1653, dispatch->array_size);
# 739 "upb/pb/compile_decoder_x64.dasc"
if (has_hash_entries) {
//| jae >7
dasm_put(Dst, 1660);
# 741 "upb/pb/compile_decoder_x64.dasc"
} else {
//| jae >5
dasm_put(Dst, 1665);
# 743 "upb/pb/compile_decoder_x64.dasc"
}
//| // OPT: Compact the lookup arr into 32-bit entries.
if ((uintptr_t)dispatch->array > 0x7fffffff) {
//| mov64 rax, (uintptr_t)dispatch->array
//| mov rax, qword [rax + rdx * 8]
dasm_put(Dst, 1670, (unsigned int)((uintptr_t)dispatch->array), (unsigned int)(((uintptr_t)dispatch->array)>>32));
# 748 "upb/pb/compile_decoder_x64.dasc"
} else {
//| mov rax, qword [rdx * 8 + dispatch->array]
dasm_put(Dst, 1679, dispatch->array);
# 750 "upb/pb/compile_decoder_x64.dasc"
}
//|3:
//| // We take advantage of the fact that non-present entries are stored
//| // as -1, which will result in wire types that will never match.
//| cmp al, cl
dasm_put(Dst, 1685);
# 755 "upb/pb/compile_decoder_x64.dasc"
if (has_multi_wiretype) {
//| jne >6
dasm_put(Dst, 1690);
# 757 "upb/pb/compile_decoder_x64.dasc"
} else {
//| jne >5
dasm_put(Dst, 1695);
# 759 "upb/pb/compile_decoder_x64.dasc"
}
//| shr rax, 16
//|
//| // Load the machine code address from the table entry.
//| // The table entry is relative to the dispatch->array jmptarget
//| // (patchdispatch() took care of this) which is the same as
//| // local label "4". The "lea" is really just trying to do
//| // lea rax, [>4 + rax]
//| //
//| // But we can't write that directly for some reason, so we use
//| // rdx as a temporary.
//| lea rdx, [>4]
//|=>define_jmptarget(jc, dispatch->array):
//|4:
//| add rax, rdx
//| ret
//|
//|5:
//| // Field isn't in our table.
//| call ->parse_unknown
//| test eax, eax // ENDGROUP?
//| jz <1
//| lea rax, [>9] // ENDGROUP; Load address of OP_ENDMSG.
//| ret
dasm_put(Dst, 1700, define_jmptarget(jc, dispatch->array));
# 783 "upb/pb/compile_decoder_x64.dasc"
if (has_multi_wiretype) {
//|6:
//| // Primary wire type didn't match, check secondary wire type.
//| cmp ah, cl
//| jne <5
//| // Secondary wire type is a match, look up fn + UPB_MAX_FIELDNUMBER.
//| add rdx, UPB_MAX_FIELDNUMBER
//| // This key will never be in the array part, so do a hash lookup.
dasm_put(Dst, 1734, UPB_MAX_FIELDNUMBER);
# 792 "upb/pb/compile_decoder_x64.dasc"
assert(has_hash_entries);
//| ld64 dispatch
{
uintptr_t v = (uintptr_t)dispatch;
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 794 "upb/pb/compile_decoder_x64.dasc"
//| jmp ->hashlookup // Tail call.
dasm_put(Dst, 1747);
# 795 "upb/pb/compile_decoder_x64.dasc"
}
if (has_hash_entries) {
//|7:
//| // Hash table lookup.
//| ld64 dispatch
dasm_put(Dst, 1752);
{
uintptr_t v = (uintptr_t)dispatch;
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 801 "upb/pb/compile_decoder_x64.dasc"
//| call ->hashlookup
//| jmp <3
dasm_put(Dst, 1755);
# 803 "upb/pb/compile_decoder_x64.dasc"
}
}
static void jittag(jitcompiler *jc, uint64_t tag, int n, int ofs,
const upb_pbdecodermethod *method) {
// Internally we parse unknown fields; if this runs us into DELIMEND we jump
// to the corresponding DELIMEND target (either msg end or repeated field
// end), which we find from the OP_CHECKDELIM which must have necessarily
// preceded us.
uint32_t last_instruction = *(jc->pc - 2);
int last_arg = (int32_t)last_instruction >> 8;
assert((last_instruction & 0xff) == OP_CHECKDELIM);
uint32_t *delimend = (jc->pc - 1) + last_arg;
const size_t ptr_words = sizeof(void*) / sizeof(uint32_t);
if (getop(*(jc->pc - 1)) == OP_TAGN) {
jc->pc += ptr_words;
}
//| chkneob n, >1
if (n == 1) {
dasm_put(Dst, 1763);
} else {
dasm_put(Dst, 1771, n);
}
# 823 "upb/pb/compile_decoder_x64.dasc"
//| // OPT: this is way too much fallback code to put here.
//| // Reduce and/or move to a separate section to make better icache usage.
//| ld64 tag
{
uintptr_t v = (uintptr_t)tag;
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 827 "upb/pb/compile_decoder_x64.dasc"
//| call ->checktag_fallback
//| cmp eax, DECODE_MISMATCH
//| je >3
//| cmp eax, DECODE_EOF
//| je =>jmptarget(jc, delimend)
//| jmp >5
dasm_put(Dst, 1787, DECODE_MISMATCH, DECODE_EOF, jmptarget(jc, delimend));
# 833 "upb/pb/compile_decoder_x64.dasc"
//|1:
dasm_put(Dst, 112);
# 835 "upb/pb/compile_decoder_x64.dasc"
switch (n) {
case 1:
//| cmp byte [PTR], tag
dasm_put(Dst, 1810, tag);
# 838 "upb/pb/compile_decoder_x64.dasc"
break;
case 2:
//| cmp word [PTR], tag
dasm_put(Dst, 1814, tag);
# 841 "upb/pb/compile_decoder_x64.dasc"
break;
case 3:
//| // OPT: Slightly more efficient code, but depends on an extra byte.
//| // mov eax, dword [PTR]
//| // shl eax, 8
//| // cmp eax, tag << 8
//| cmp word [PTR], (tag & 0xffff)
//| jne >2
//| cmp byte [PTR + 2], (tag >> 16)
//|2:
dasm_put(Dst, 1819, (tag & 0xffff), 2, (tag >> 16));
# 851 "upb/pb/compile_decoder_x64.dasc"
break;
case 4:
//| cmp dword [PTR], tag
dasm_put(Dst, 1834, tag);
# 854 "upb/pb/compile_decoder_x64.dasc"
break;
case 5:
//| cmp dword [PTR], (tag & 0xffffffff)
//| jne >3
//| cmp byte [PTR + 4], (tag >> 32)
dasm_put(Dst, 1838, (tag & 0xffffffff), 4, (tag >> 32));
# 859 "upb/pb/compile_decoder_x64.dasc"
}
//| je >4
//|3:
dasm_put(Dst, 1850);
# 862 "upb/pb/compile_decoder_x64.dasc"
if (ofs == 0) {
//| call =>jmptarget(jc, &method->dispatch)
//| test rax, rax
//| jz =>jmptarget(jc, delimend)
//| jmp rax
dasm_put(Dst, 1857, jmptarget(jc, &method->dispatch), jmptarget(jc, delimend));
# 867 "upb/pb/compile_decoder_x64.dasc"
} else {
//| jmp =>jmptarget(jc, jc->pc + ofs)
dasm_put(Dst, 1869, jmptarget(jc, jc->pc + ofs));
# 869 "upb/pb/compile_decoder_x64.dasc"
}
//|4:
//| add PTR, n
//|5:
dasm_put(Dst, 1873, n);
# 873 "upb/pb/compile_decoder_x64.dasc"
}
// Compile the bytecode to x64.
static void jitbytecode(jitcompiler *jc) {
upb_pbdecodermethod *method = NULL;
const upb_handlers *h = NULL;
for (jc->pc = jc->group->bytecode; jc->pc < jc->group->bytecode_end; ) {
int32_t instr = *jc->pc;
opcode op = instr & 0xff;
uint32_t arg = instr >> 8;
int32_t longofs = arg;
if (op != OP_SETDISPATCH) {
// Skipped for SETDISPATCH because it defines its own asmlabel for the
// dispatch code it emits.
asmlabel(jc, "0x%lx.%s", pcofs(jc), upb_pbdecoder_getopname(op));
// Skipped for SETDISPATCH because it should point at the function
// prologue, not the dispatch function that is emitted first.
// TODO: optimize this to only define pclabels that are actually used.
//|=>define_jmptarget(jc, jc->pc):
dasm_put(Dst, 0, define_jmptarget(jc, jc->pc));
# 894 "upb/pb/compile_decoder_x64.dasc"
}
jc->pc++;
switch (op) {
case OP_STARTMSG: {
upb_func *startmsg = gethandler(h, UPB_STARTMSG_SELECTOR);
if (startmsg) {
// bool startmsg(void *closure, const void *hd)
//|1:
//| mov ARG1_64, CLOSURE
//| load_handler_data h, UPB_STARTMSG_SELECTOR
dasm_put(Dst, 1882);
{
uintptr_t v = (uintptr_t)upb_handlers_gethandlerdata(h, UPB_STARTMSG_SELECTOR);
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 906 "upb/pb/compile_decoder_x64.dasc"
//| callp startmsg
dasm_put(Dst, 1492, (unsigned int)((uintptr_t)startmsg), (unsigned int)(((uintptr_t)startmsg)>>32), 0xfffffffffffffff0UL);
# 907 "upb/pb/compile_decoder_x64.dasc"
if (!alwaysok(h, UPB_STARTMSG_SELECTOR)) {
//| test al, al
//| jnz >2
//| call ->suspend
//| jmp <1
//|2:
dasm_put(Dst, 1889);
# 913 "upb/pb/compile_decoder_x64.dasc"
}
} else {
//| nop
dasm_put(Dst, 1905);
# 916 "upb/pb/compile_decoder_x64.dasc"
}
break;
}
case OP_ENDMSG: {
upb_func *endmsg = gethandler(h, UPB_ENDMSG_SELECTOR);
//|9:
dasm_put(Dst, 1907);
# 922 "upb/pb/compile_decoder_x64.dasc"
if (endmsg) {
// bool endmsg(void *closure, const void *hd, upb_status *status)
//| mov ARG1_64, CLOSURE
//| load_handler_data h, UPB_ENDMSG_SELECTOR
dasm_put(Dst, 1487);
{
uintptr_t v = (uintptr_t)upb_handlers_gethandlerdata(h, UPB_ENDMSG_SELECTOR);
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 926 "upb/pb/compile_decoder_x64.dasc"
//| mov ARG3_64, DECODER->status
//| callp endmsg
dasm_put(Dst, 1910, Dt2(->status), (unsigned int)((uintptr_t)endmsg), (unsigned int)(((uintptr_t)endmsg)>>32), 0xfffffffffffffff0UL);
# 928 "upb/pb/compile_decoder_x64.dasc"
}
break;
}
case OP_SETDISPATCH: {
uint32_t *op_pc = jc->pc - 1;
// Load info for new method.
upb_inttable *dispatch;
memcpy(&dispatch, jc->pc, sizeof(void*));
jc->pc += sizeof(void*) / sizeof(uint32_t);
// The OP_SETDISPATCH bytecode contains a pointer that is
// &method->dispatch; we want to go backwards and recover method.
method =
(void*)((char*)dispatch - offsetof(upb_pbdecodermethod, dispatch));
// May be NULL, in which case no handlers for this message will be found.
// OPT: we should do better by completely skipping the message in this
// case instead of parsing it field by field. We should also do the skip
// in the containing message's code.
h = method->dest_handlers_;
const char *msgname = upb_msgdef_fullname(upb_handlers_msgdef(h));
// Emit dispatch code for new method.
asmlabel(jc, "0x%lx.dispatch.%s", pcofs(jc), msgname);
jitdispatch(jc, method);
// Emit function prologue for new method.
asmlabel(jc, "0x%lx.parse.%s", pcofs(jc), msgname);
//|=>define_jmptarget(jc, op_pc):
//|=>define_jmptarget(jc, method):
//| sub rsp, 8
dasm_put(Dst, 1936, define_jmptarget(jc, op_pc), define_jmptarget(jc, method));
# 958 "upb/pb/compile_decoder_x64.dasc"
break;
}
case OP_PARSE_DOUBLE:
case OP_PARSE_FLOAT:
case OP_PARSE_INT64:
case OP_PARSE_UINT64:
case OP_PARSE_INT32:
case OP_PARSE_FIXED64:
case OP_PARSE_FIXED32:
case OP_PARSE_BOOL:
case OP_PARSE_UINT32:
case OP_PARSE_SFIXED32:
case OP_PARSE_SFIXED64:
case OP_PARSE_SINT32:
case OP_PARSE_SINT64:
jitprimitive(jc, op, h, arg);
break;
case OP_STARTSEQ:
case OP_STARTSUBMSG:
case OP_STARTSTR: {
upb_func *start = gethandler(h, arg);
if (start) {
// void *startseq(void *closure, const void *hd)
// void *startsubmsg(void *closure, const void *hd)
// void *startstr(void *closure, const void *hd, size_t size_hint)
//|1:
//| mov ARG1_64, CLOSURE
//| load_handler_data h, arg
dasm_put(Dst, 1882);
{
uintptr_t v = (uintptr_t)upb_handlers_gethandlerdata(h, arg);
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 987 "upb/pb/compile_decoder_x64.dasc"
if (op == OP_STARTSTR) {
//| mov ARG3_64, DELIMEND
//| sub ARG3_64, PTR
dasm_put(Dst, 1944);
# 990 "upb/pb/compile_decoder_x64.dasc"
}
//| callp start
dasm_put(Dst, 1492, (unsigned int)((uintptr_t)start), (unsigned int)(((uintptr_t)start)>>32), 0xfffffffffffffff0UL);
# 992 "upb/pb/compile_decoder_x64.dasc"
if (!alwaysok(h, arg)) {
//| test rax, rax
//| jnz >2
//| call ->suspend
//| jmp <1
//|2:
dasm_put(Dst, 1952);
# 998 "upb/pb/compile_decoder_x64.dasc"
}
//| mov CLOSURE, rax
dasm_put(Dst, 1969);
# 1000 "upb/pb/compile_decoder_x64.dasc"
} else {
// TODO: nop is only required because of asmlabel().
//| nop
dasm_put(Dst, 1905);
# 1003 "upb/pb/compile_decoder_x64.dasc"
}
break;
}
case OP_ENDSEQ:
case OP_ENDSUBMSG:
case OP_ENDSTR: {
upb_func *end = gethandler(h, arg);
if (end) {
// bool endseq(void *closure, const void *hd)
// bool endsubmsg(void *closure, const void *hd)
// bool endstr(void *closure, const void *hd)
//|1:
//| mov ARG1_64, CLOSURE
//| load_handler_data h, arg
dasm_put(Dst, 1882);
{
uintptr_t v = (uintptr_t)upb_handlers_gethandlerdata(h, arg);
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 1017 "upb/pb/compile_decoder_x64.dasc"
//| callp end
dasm_put(Dst, 1492, (unsigned int)((uintptr_t)end), (unsigned int)(((uintptr_t)end)>>32), 0xfffffffffffffff0UL);
# 1018 "upb/pb/compile_decoder_x64.dasc"
if (!alwaysok(h, arg)) {
//| test al, al
//| jnz >2
//| call ->suspend
//| jmp <1
//|2:
dasm_put(Dst, 1889);
# 1024 "upb/pb/compile_decoder_x64.dasc"
}
} else {
// TODO: nop is only required because of asmlabel().
//| nop
dasm_put(Dst, 1905);
# 1028 "upb/pb/compile_decoder_x64.dasc"
}
break;
}
case OP_STRING: {
upb_func *str = gethandler(h, arg);
//| cmp PTR, DELIMEND
//| je >4
//|1:
//| cmp PTR, DATAEND
//| jne >2
//| call ->suspend
//| jmp <1
//|2:
dasm_put(Dst, 1973);
# 1041 "upb/pb/compile_decoder_x64.dasc"
if (str) {
// size_t str(void *closure, const void *hd, const char *str, size_t n)
//| mov ARG1_64, CLOSURE
//| load_handler_data h, arg
dasm_put(Dst, 1487);
{
uintptr_t v = (uintptr_t)upb_handlers_gethandlerdata(h, arg);
if (v > 0xffffffff) {
dasm_put(Dst, 446, (unsigned int)(v), (unsigned int)((v)>>32));
} else if (v) {
dasm_put(Dst, 451, v);
} else {
dasm_put(Dst, 454);
}
}
# 1045 "upb/pb/compile_decoder_x64.dasc"
//| mov ARG3_64, PTR
//| mov ARG4_64, DATAEND
//| sub ARG4_64, PTR
//| mov ARG5_64, qword DECODER->handle
//| callp str
//| add PTR, rax
dasm_put(Dst, 2000, Dt2(->handle), (unsigned int)((uintptr_t)str), (unsigned int)(((uintptr_t)str)>>32), 0xfffffffffffffff0UL);
# 1051 "upb/pb/compile_decoder_x64.dasc"
if (!alwaysok(h, arg)) {
//| cmp PTR, DATAEND
//| je >3
//| call ->strret_fallback
//|3:
dasm_put(Dst, 2038);
# 1056 "upb/pb/compile_decoder_x64.dasc"
}
} else {
//| mov PTR, DATAEND
dasm_put(Dst, 2051);
# 1059 "upb/pb/compile_decoder_x64.dasc"
}
//| cmp PTR, DELIMEND
//| jne <1
//|4:
dasm_put(Dst, 2055);
# 1063 "upb/pb/compile_decoder_x64.dasc"
break;
}
case OP_PUSHTAGDELIM:
//| mov FRAME->sink.closure, CLOSURE
//| // This shouldn't need to be read, because tag-delimited fields
//| // shouldn't have an OP_SETDELIM after them. But for the moment
//| // non-packed repeated fields do OP_SETDELIM so they can share more
//| // code with the packed code-path. If this is changed later, this
//| // store can be removed.
//| mov qword FRAME->end_ofs, 0
//| add FRAME, sizeof(upb_pbdecoder_frame)
//| cmp FRAME, DECODER->limit
//| je ->err
//| mov dword FRAME->groupnum, arg
dasm_put(Dst, 2066, Dt1(->sink.closure), Dt1(->end_ofs), sizeof(upb_pbdecoder_frame), Dt2(->limit), Dt1(->groupnum), arg);
# 1077 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_PUSHLENDELIM:
//| call ->pushlendelim
dasm_put(Dst, 2096);
# 1080 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_POP:
//| sub FRAME, sizeof(upb_pbdecoder_frame)
//| mov CLOSURE, FRAME->sink.closure
dasm_put(Dst, 2100, sizeof(upb_pbdecoder_frame), Dt1(->sink.closure));
# 1084 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_SETDELIM:
// OPT: experiment with testing vs old offset to optimize away.
//| mov DATAEND, DECODER->end
//| add DELIMEND, FRAME->end_ofs
//| cmp DELIMEND, DECODER->buf
//| jb >1
//| cmp DELIMEND, DATAEND
//| ja >1 // OPT: try cmov.
//| mov DATAEND, DELIMEND
//|1:
dasm_put(Dst, 2110, Dt2(->end), Dt1(->end_ofs), Dt2(->buf));
# 1095 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_SETBIGGROUPNUM:
//| mov dword FRAME->groupnum, *jc->pc++
dasm_put(Dst, 2090, Dt1(->groupnum), *jc->pc++);
# 1098 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_CHECKDELIM:
//| cmp DELIMEND, PTR
//| je =>jmptarget(jc, jc->pc + longofs)
dasm_put(Dst, 2140, jmptarget(jc, jc->pc + longofs));
# 1102 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_CALL:
//| call =>jmptarget(jc, jc->pc + longofs)
dasm_put(Dst, 2147, jmptarget(jc, jc->pc + longofs));
# 1105 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_BRANCH:
//| jmp =>jmptarget(jc, jc->pc + longofs);
dasm_put(Dst, 1869, jmptarget(jc, jc->pc + longofs));
# 1108 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_RET:
//|9:
//| add rsp, 8
//| ret
dasm_put(Dst, 2150);
# 1113 "upb/pb/compile_decoder_x64.dasc"
break;
case OP_TAG1:
jittag(jc, (arg >> 8) & 0xff, 1, (int8_t)arg, method);
break;
case OP_TAG2:
jittag(jc, (arg >> 8) & 0xffff, 2, (int8_t)arg, method);
break;
case OP_TAGN: {
uint64_t tag;
memcpy(&tag, jc->pc, 8);
jittag(jc, tag, arg >> 8, (int8_t)arg, method);
break;
}
case OP_HALT:
assert(false);
}
}
asmlabel(jc, "eof");
//| nop
dasm_put(Dst, 1905);
# 1133 "upb/pb/compile_decoder_x64.dasc"
}