From bd3fe0cac583739bc0d7c4b5c8f301bb350abca0 Mon Sep 17 00:00:00 2001
From: Andy Belle-Isle <drumsetmonkey@gmail.com>
Date: Fri, 30 Aug 2019 00:19:31 -0400
Subject: Renamed lib to deps so github will ignore it for language stats
---
deps/LuaJIT/dynasm/dasm_arm64.h | 519 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 519 insertions(+)
create mode 100644 deps/LuaJIT/dynasm/dasm_arm64.h
(limited to 'deps/LuaJIT/dynasm/dasm_arm64.h')
diff --git a/deps/LuaJIT/dynasm/dasm_arm64.h b/deps/LuaJIT/dynasm/dasm_arm64.h
new file mode 100644
index 0000000..ff21236
--- /dev/null
+++ b/deps/LuaJIT/dynasm/dasm_arm64.h
@@ -0,0 +1,519 @@
+/*
+** DynASM ARM64 encoding engine.
+** Copyright (C) 2005-2017 Mike Pall. All rights reserved.
+** Released under the MIT license. See dynasm.lua for full copyright notice.
+*/
+
+#include <stddef.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define DASM_ARCH "arm64"
+
+#ifndef DASM_EXTERN
+#define DASM_EXTERN(a,b,c,d) 0
+#endif
+
+/* Action definitions. */
+enum {
+ DASM_STOP, DASM_SECTION, DASM_ESC, DASM_REL_EXT,
+ /* The following actions need a buffer position. */
+ DASM_ALIGN, DASM_REL_LG, DASM_LABEL_LG,
+ /* The following actions also have an argument. */
+ DASM_REL_PC, DASM_LABEL_PC,
+ DASM_IMM, DASM_IMM6, DASM_IMM12, DASM_IMM13W, DASM_IMM13X, DASM_IMML,
+ DASM__MAX
+};
+
+/* Maximum number of section buffer positions for a single dasm_put() call. */
+#define DASM_MAXSECPOS 25
+
+/* DynASM encoder status codes. Action list offset or number are or'ed in. */
+#define DASM_S_OK 0x00000000
+#define DASM_S_NOMEM 0x01000000
+#define DASM_S_PHASE 0x02000000
+#define DASM_S_MATCH_SEC 0x03000000
+#define DASM_S_RANGE_I 0x11000000
+#define DASM_S_RANGE_SEC 0x12000000
+#define DASM_S_RANGE_LG 0x13000000
+#define DASM_S_RANGE_PC 0x14000000
+#define DASM_S_RANGE_REL 0x15000000
+#define DASM_S_UNDEF_LG 0x21000000
+#define DASM_S_UNDEF_PC 0x22000000
+
+/* Macros to convert positions (8 bit section + 24 bit index). */
+#define DASM_POS2IDX(pos) ((pos)&0x00ffffff)
+#define DASM_POS2BIAS(pos) ((pos)&0xff000000)
+#define DASM_SEC2POS(sec) ((sec)<<24)
+#define DASM_POS2SEC(pos) ((pos)>>24)
+#define DASM_POS2PTR(D, pos) (D->sections[DASM_POS2SEC(pos)].rbuf + (pos))
+
+/* Action list type. */
+typedef const unsigned int *dasm_ActList;
+
+/* Per-section structure. */
+typedef struct dasm_Section {
+ int *rbuf; /* Biased buffer pointer (negative section bias). */
+ int *buf; /* True buffer pointer. */
+ size_t bsize; /* Buffer size in bytes. */
+ int pos; /* Biased buffer position. */
+ int epos; /* End of biased buffer position - max single put. */
+ int ofs; /* Byte offset into section. */
+} dasm_Section;
+
+/* Core structure holding the DynASM encoding state. */
+struct dasm_State {
+ size_t psize; /* Allocated size of this structure. */
+ dasm_ActList actionlist; /* Current actionlist pointer. */
+ int *lglabels; /* Local/global chain/pos ptrs. */
+ size_t lgsize;
+ int *pclabels; /* PC label chains/pos ptrs. */
+ size_t pcsize;
+ void **globals; /* Array of globals (bias -10). */
+ dasm_Section *section; /* Pointer to active section. */
+ size_t codesize; /* Total size of all code sections. */
+ int maxsection; /* 0 <= sectionidx < maxsection. */
+ int status; /* Status code. */
+ dasm_Section sections[1]; /* All sections. Alloc-extended. */
+};
+
+/* The size of the core structure depends on the max. number of sections. */
+#define DASM_PSZ(ms) (sizeof(dasm_State)+(ms-1)*sizeof(dasm_Section))
+
+
+/* Initialize DynASM state. */
+void dasm_init(Dst_DECL, int maxsection)
+{
+ dasm_State *D;
+ size_t psz = 0;
+ int i;
+ Dst_REF = NULL;
+ DASM_M_GROW(Dst, struct dasm_State, Dst_REF, psz, DASM_PSZ(maxsection));
+ D = Dst_REF;
+ D->psize = psz;
+ D->lglabels = NULL;
+ D->lgsize = 0;
+ D->pclabels = NULL;
+ D->pcsize = 0;
+ D->globals = NULL;
+ D->maxsection = maxsection;
+ for (i = 0; i < maxsection; i++) {
+ D->sections[i].buf = NULL; /* Need this for pass3. */
+ D->sections[i].rbuf = D->sections[i].buf - DASM_SEC2POS(i);
+ D->sections[i].bsize = 0;
+ D->sections[i].epos = 0; /* Wrong, but is recalculated after resize. */
+ }
+}
+
+/* Free DynASM state. */
+void dasm_free(Dst_DECL)
+{
+ dasm_State *D = Dst_REF;
+ int i;
+ for (i = 0; i < D->maxsection; i++)
+ if (D->sections[i].buf)
+ DASM_M_FREE(Dst, D->sections[i].buf, D->sections[i].bsize);
+ if (D->pclabels) DASM_M_FREE(Dst, D->pclabels, D->pcsize);
+ if (D->lglabels) DASM_M_FREE(Dst, D->lglabels, D->lgsize);
+ DASM_M_FREE(Dst, D, D->psize);
+}
+
+/* Setup global label array. Must be called before dasm_setup(). */
+void dasm_setupglobal(Dst_DECL, void **gl, unsigned int maxgl)
+{
+ dasm_State *D = Dst_REF;
+ D->globals = gl - 10; /* Negative bias to compensate for locals. */
+ DASM_M_GROW(Dst, int, D->lglabels, D->lgsize, (10+maxgl)*sizeof(int));
+}
+
+/* Grow PC label array. Can be called after dasm_setup(), too. */
+void dasm_growpc(Dst_DECL, unsigned int maxpc)
+{
+ dasm_State *D = Dst_REF;
+ size_t osz = D->pcsize;
+ DASM_M_GROW(Dst, int, D->pclabels, D->pcsize, maxpc*sizeof(int));
+ memset((void *)(((unsigned char *)D->pclabels)+osz), 0, D->pcsize-osz);
+}
+
+/* Setup encoder. */
+void dasm_setup(Dst_DECL, const void *actionlist)
+{
+ dasm_State *D = Dst_REF;
+ int i;
+ D->actionlist = (dasm_ActList)actionlist;
+ D->status = DASM_S_OK;
+ D->section = &D->sections[0];
+ memset((void *)D->lglabels, 0, D->lgsize);
+ if (D->pclabels) memset((void *)D->pclabels, 0, D->pcsize);
+ for (i = 0; i < D->maxsection; i++) {
+ D->sections[i].pos = DASM_SEC2POS(i);
+ D->sections[i].ofs = 0;
+ }
+}
+
+
+#ifdef DASM_CHECKS
+#define CK(x, st) \
+ do { if (!(x)) { \
+ D->status = DASM_S_##st|(p-D->actionlist-1); return; } } while (0)
+#define CKPL(kind, st) \
+ do { if ((size_t)((char *)pl-(char *)D->kind##labels) >= D->kind##size) { \
+ D->status = DASM_S_RANGE_##st|(p-D->actionlist-1); return; } } while (0)
+#else
+#define CK(x, st) ((void)0)
+#define CKPL(kind, st) ((void)0)
+#endif
+
+static int dasm_imm12(unsigned int n)
+{
+ if ((n >> 12) == 0)
+ return n;
+ else if ((n & 0xff000fff) == 0)
+ return (n >> 12) | 0x1000;
+ else
+ return -1;
+}
+
+static int dasm_ffs(unsigned long long x)
+{
+ int n = -1;
+ while (x) { x >>= 1; n++; }
+ return n;
+}
+
+static int dasm_imm13(int lo, int hi)
+{
+ int inv = 0, w = 64, s = 0xfff, xa, xb;
+ unsigned long long n = (((unsigned long long)hi) << 32) | (unsigned int)lo;
+ unsigned long long m = 1ULL, a, b, c;
+ if (n & 1) { n = ~n; inv = 1; }
+ a = n & -n; b = (n+a)&-(n+a); c = (n+a-b)&-(n+a-b);
+ xa = dasm_ffs(a); xb = dasm_ffs(b);
+ if (c) {
+ w = dasm_ffs(c) - xa;
+ if (w == 32) m = 0x0000000100000001UL;
+ else if (w == 16) m = 0x0001000100010001UL;
+ else if (w == 8) m = 0x0101010101010101UL;
+ else if (w == 4) m = 0x1111111111111111UL;
+ else if (w == 2) m = 0x5555555555555555UL;
+ else return -1;
+ s = (-2*w & 0x3f) - 1;
+ } else if (!a) {
+ return -1;
+ } else if (xb == -1) {
+ xb = 64;
+ }
+ if ((b-a) * m != n) return -1;
+ if (inv) {
+ return ((w - xb) << 6) | (s+w+xa-xb);
+ } else {
+ return ((w - xa) << 6) | (s+xb-xa);
+ }
+ return -1;
+}
+
+/* Pass 1: Store actions and args, link branches/labels, estimate offsets. */
+void dasm_put(Dst_DECL, int start, ...)
+{
+ va_list ap;
+ dasm_State *D = Dst_REF;
+ dasm_ActList p = D->actionlist + start;
+ dasm_Section *sec = D->section;
+ int pos = sec->pos, ofs = sec->ofs;
+ int *b;
+
+ if (pos >= sec->epos) {
+ DASM_M_GROW(Dst, int, sec->buf, sec->bsize,
+ sec->bsize + 2*DASM_MAXSECPOS*sizeof(int));
+ sec->rbuf = sec->buf - DASM_POS2BIAS(pos);
+ sec->epos = (int)sec->bsize/sizeof(int) - DASM_MAXSECPOS+DASM_POS2BIAS(pos);
+ }
+
+ b = sec->rbuf;
+ b[pos++] = start;
+
+ va_start(ap, start);
+ while (1) {
+ unsigned int ins = *p++;
+ unsigned int action = (ins >> 16);
+ if (action >= DASM__MAX) {
+ ofs += 4;
+ } else {
+ int *pl, n = action >= DASM_REL_PC ? va_arg(ap, int) : 0;
+ switch (action) {
+ case DASM_STOP: goto stop;
+ case DASM_SECTION:
+ n = (ins & 255); CK(n < D->maxsection, RANGE_SEC);
+ D->section = &D->sections[n]; goto stop;
+ case DASM_ESC: p++; ofs += 4; break;
+ case DASM_REL_EXT: break;
+ case DASM_ALIGN: ofs += (ins & 255); b[pos++] = ofs; break;
+ case DASM_REL_LG:
+ n = (ins & 2047) - 10; pl = D->lglabels + n;
+ /* Bkwd rel or global. */
+ if (n >= 0) { CK(n>=10||*pl<0, RANGE_LG); CKPL(lg, LG); goto putrel; }
+ pl += 10; n = *pl;
+ if (n < 0) n = 0; /* Start new chain for fwd rel if label exists. */
+ goto linkrel;
+ case DASM_REL_PC:
+ pl = D->pclabels + n; CKPL(pc, PC);
+ putrel:
+ n = *pl;
+ if (n < 0) { /* Label exists. Get label pos and store it. */
+ b[pos] = -n;
+ } else {
+ linkrel:
+ b[pos] = n; /* Else link to rel chain, anchored at label. */
+ *pl = pos;
+ }
+ pos++;
+ break;
+ case DASM_LABEL_LG:
+ pl = D->lglabels + (ins & 2047) - 10; CKPL(lg, LG); goto putlabel;
+ case DASM_LABEL_PC:
+ pl = D->pclabels + n; CKPL(pc, PC);
+ putlabel:
+ n = *pl; /* n > 0: Collapse rel chain and replace with label pos. */
+ while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = pos;
+ }
+ *pl = -pos; /* Label exists now. */
+ b[pos++] = ofs; /* Store pass1 offset estimate. */
+ break;
+ case DASM_IMM:
+ CK((n & ((1<<((ins>>10)&31))-1)) == 0, RANGE_I);
+ n >>= ((ins>>10)&31);
+#ifdef DASM_CHECKS
+ if ((ins & 0x8000))
+ CK(((n + (1<<(((ins>>5)&31)-1)))>>((ins>>5)&31)) == 0, RANGE_I);
+ else
+ CK((n>>((ins>>5)&31)) == 0, RANGE_I);
+#endif
+ b[pos++] = n;
+ break;
+ case DASM_IMM6:
+ CK((n >> 6) == 0, RANGE_I);
+ b[pos++] = n;
+ break;
+ case DASM_IMM12:
+ CK(dasm_imm12((unsigned int)n) != -1, RANGE_I);
+ b[pos++] = n;
+ break;
+ case DASM_IMM13W:
+ CK(dasm_imm13(n, n) != -1, RANGE_I);
+ b[pos++] = n;
+ break;
+ case DASM_IMM13X: {
+ int m = va_arg(ap, int);
+ CK(dasm_imm13(n, m) != -1, RANGE_I);
+ b[pos++] = n;
+ b[pos++] = m;
+ break;
+ }
+ case DASM_IMML: {
+#ifdef DASM_CHECKS
+ int scale = (p[-2] >> 30);
+ CK((!(n & ((1<<scale)-1)) && (unsigned int)(n>>scale) < 4096) ||
+ (unsigned int)(n+256) < 512, RANGE_I);
+#endif
+ b[pos++] = n;
+ break;
+ }
+ }
+ }
+ }
+stop:
+ va_end(ap);
+ sec->pos = pos;
+ sec->ofs = ofs;
+}
+#undef CK
+
+/* Pass 2: Link sections, shrink aligns, fix label offsets. */
+int dasm_link(Dst_DECL, size_t *szp)
+{
+ dasm_State *D = Dst_REF;
+ int secnum;
+ int ofs = 0;
+
+#ifdef DASM_CHECKS
+ *szp = 0;
+ if (D->status != DASM_S_OK) return D->status;
+ {
+ int pc;
+ for (pc = 0; pc*sizeof(int) < D->pcsize; pc++)
+ if (D->pclabels[pc] > 0) return DASM_S_UNDEF_PC|pc;
+ }
+#endif
+
+ { /* Handle globals not defined in this translation unit. */
+ int idx;
+ for (idx = 20; idx*sizeof(int) < D->lgsize; idx++) {
+ int n = D->lglabels[idx];
+ /* Undefined label: Collapse rel chain and replace with marker (< 0). */
+ while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; }
+ }
+ }
+
+ /* Combine all code sections. No support for data sections (yet). */
+ for (secnum = 0; secnum < D->maxsection; secnum++) {
+ dasm_Section *sec = D->sections + secnum;
+ int *b = sec->rbuf;
+ int pos = DASM_SEC2POS(secnum);
+ int lastpos = sec->pos;
+
+ while (pos != lastpos) {
+ dasm_ActList p = D->actionlist + b[pos++];
+ while (1) {
+ unsigned int ins = *p++;
+ unsigned int action = (ins >> 16);
+ switch (action) {
+ case DASM_STOP: case DASM_SECTION: goto stop;
+ case DASM_ESC: p++; break;
+ case DASM_REL_EXT: break;
+ case DASM_ALIGN: ofs -= (b[pos++] + ofs) & (ins & 255); break;
+ case DASM_REL_LG: case DASM_REL_PC: pos++; break;
+ case DASM_LABEL_LG: case DASM_LABEL_PC: b[pos++] += ofs; break;
+ case DASM_IMM: case DASM_IMM6: case DASM_IMM12: case DASM_IMM13W:
+ case DASM_IMML: pos++; break;
+ case DASM_IMM13X: pos += 2; break;
+ }
+ }
+ stop: (void)0;
+ }
+ ofs += sec->ofs; /* Next section starts right after current section. */
+ }
+
+ D->codesize = ofs; /* Total size of all code sections */
+ *szp = ofs;
+ return DASM_S_OK;
+}
+
+#ifdef DASM_CHECKS
+#define CK(x, st) \
+ do { if (!(x)) return DASM_S_##st|(p-D->actionlist-1); } while (0)
+#else
+#define CK(x, st) ((void)0)
+#endif
+
+/* Pass 3: Encode sections. */
+int dasm_encode(Dst_DECL, void *buffer)
+{
+ dasm_State *D = Dst_REF;
+ char *base = (char *)buffer;
+ unsigned int *cp = (unsigned int *)buffer;
+ int secnum;
+
+ /* Encode all code sections. No support for data sections (yet). */
+ for (secnum = 0; secnum < D->maxsection; secnum++) {
+ dasm_Section *sec = D->sections + secnum;
+ int *b = sec->buf;
+ int *endb = sec->rbuf + sec->pos;
+
+ while (b != endb) {
+ dasm_ActList p = D->actionlist + *b++;
+ while (1) {
+ unsigned int ins = *p++;
+ unsigned int action = (ins >> 16);
+ int n = (action >= DASM_ALIGN && action < DASM__MAX) ? *b++ : 0;
+ switch (action) {
+ case DASM_STOP: case DASM_SECTION: goto stop;
+ case DASM_ESC: *cp++ = *p++; break;
+ case DASM_REL_EXT:
+ n = DASM_EXTERN(Dst, (unsigned char *)cp, (ins&2047), !(ins&2048));
+ goto patchrel;
+ case DASM_ALIGN:
+ ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0xe1a00000;
+ break;
+ case DASM_REL_LG:
+ CK(n >= 0, UNDEF_LG);
+ /* fallthrough */
+ case DASM_REL_PC:
+ CK(n >= 0, UNDEF_PC);
+ n = *DASM_POS2PTR(D, n) - (int)((char *)cp - base) + 4;
+ patchrel:
+ if (!(ins & 0xf800)) { /* B, BL */
+ CK((n & 3) == 0 && ((n+0x08000000) >> 28) == 0, RANGE_REL);
+ cp[-1] |= ((n >> 2) & 0x03ffffff);
+ } else if ((ins & 0x800)) { /* B.cond, CBZ, CBNZ, LDR* literal */
+ CK((n & 3) == 0 && ((n+0x00100000) >> 21) == 0, RANGE_REL);
+ cp[-1] |= ((n << 3) & 0x00ffffe0);
+ } else if ((ins & 0x3000) == 0x2000) { /* ADR */
+ CK(((n+0x00100000) >> 21) == 0, RANGE_REL);
+ cp[-1] |= ((n << 3) & 0x00ffffe0) | ((n & 3) << 29);
+ } else if ((ins & 0x3000) == 0x3000) { /* ADRP */
+ cp[-1] |= ((n >> 9) & 0x00ffffe0) | (((n >> 12) & 3) << 29);
+ } else if ((ins & 0x1000)) { /* TBZ, TBNZ */
+ CK((n & 3) == 0 && ((n+0x00008000) >> 16) == 0, RANGE_REL);
+ cp[-1] |= ((n << 3) & 0x0007ffe0);
+ }
+ break;
+ case DASM_LABEL_LG:
+ ins &= 2047; if (ins >= 20) D->globals[ins-10] = (void *)(base + n);
+ break;
+ case DASM_LABEL_PC: break;
+ case DASM_IMM:
+ cp[-1] |= (n & ((1<<((ins>>5)&31))-1)) << (ins&31);
+ break;
+ case DASM_IMM6:
+ cp[-1] |= ((n&31) << 19) | ((n&32) << 26);
+ break;
+ case DASM_IMM12:
+ cp[-1] |= (dasm_imm12((unsigned int)n) << 10);
+ break;
+ case DASM_IMM13W:
+ cp[-1] |= (dasm_imm13(n, n) << 10);
+ break;
+ case DASM_IMM13X:
+ cp[-1] |= (dasm_imm13(n, *b++) << 10);
+ break;
+ case DASM_IMML: {
+ int scale = (p[-2] >> 30);
+ cp[-1] |= (!(n & ((1<<scale)-1)) && (unsigned int)(n>>scale) < 4096) ?
+ ((n << (10-scale)) | 0x01000000) : ((n & 511) << 12);
+ break;
+ }
+ default: *cp++ = ins; break;
+ }
+ }
+ stop: (void)0;
+ }
+ }
+
+ if (base + D->codesize != (char *)cp) /* Check for phase errors. */
+ return DASM_S_PHASE;
+ return DASM_S_OK;
+}
+#undef CK
+
+/* Get PC label offset. */
+int dasm_getpclabel(Dst_DECL, unsigned int pc)
+{
+ dasm_State *D = Dst_REF;
+ if (pc*sizeof(int) < D->pcsize) {
+ int pos = D->pclabels[pc];
+ if (pos < 0) return *DASM_POS2PTR(D, -pos);
+ if (pos > 0) return -1; /* Undefined. */
+ }
+ return -2; /* Unused or out of range. */
+}
+
+#ifdef DASM_CHECKS
+/* Optional sanity checker to call between isolated encoding steps. */
+int dasm_checkstep(Dst_DECL, int secmatch)
+{
+ dasm_State *D = Dst_REF;
+ if (D->status == DASM_S_OK) {
+ int i;
+ for (i = 1; i <= 9; i++) {
+ if (D->lglabels[i] > 0) { D->status = DASM_S_UNDEF_LG|i; break; }
+ D->lglabels[i] = 0;
+ }
+ }
+ if (D->status == DASM_S_OK && secmatch >= 0 &&
+ D->section != &D->sections[secmatch])
+ D->status = DASM_S_MATCH_SEC|(D->section-D->sections);
+ return D->status;
+}
+#endif
+
--
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