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format.c
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format.c
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#include <disarm64.h>
#include <stdint.h>
static char* da_strpcat4(char* restrict dst, const char* str, unsigned len) {
for (unsigned i = 0; i < 4; i++)
dst[i] = str[i];
return dst + len;
}
static char* da_strpcat8(char* restrict dst, const char* str, unsigned len) {
for (unsigned i = 0; i < 8; i++)
dst[i] = str[i];
return dst + len;
}
static char* da_strpcat12(char* restrict dst, const char* str, unsigned len) {
for (unsigned i = 0; i < 12; i++)
dst[i] = str[i];
return dst + len;
}
static char* da_strpcatimmdecstr(char* restrict dst, unsigned imm,
unsigned skip) {
static const char* tbl =
" #0\0 #1\0 #2\0 #3\0 #4\0 #5\0 #6\0 #7\0 "
" #8\0 #9\0 #10\0 #11\0 #12\0 #13\0 #14\0 #15\0"
" #16\0 #17\0 #18\0 #19\0 #20\0 #21\0 #22\0 #23\0"
" #24\0 #25\0 #26\0 #27\0 #28\0 #29\0 #30\0 #31\0"
" #32\0 #33\0 #34\0 #35\0 #36\0 #37\0 #38\0 #39\0"
" #40\0 #41\0 #42\0 #43\0 #44\0 #45\0 #46\0 #47\0"
" #48\0 #49\0 #50\0 #51\0 #52\0 #53\0 #54\0 #55\0"
" #56\0 #57\0 #58\0 #59\0 #60\0 #61\0 #62\0 #63\0 #64";
return da_strpcat4(dst, tbl + 5 * imm + skip, 3 - skip + (imm >= 10));
}
static char* da_strpcatuimmhex(char* restrict dst, uint64_t imm) {
unsigned numbytes = 16 - (__builtin_clzll(imm | 1) / 4);
unsigned idx = numbytes;
do {
dst[--idx] = "0123456789abcdef"[imm % 16];
imm /= 16;
} while (imm);
return dst + numbytes;
}
static char* da_strpcatsimmhex16(char* restrict dst, int16_t imm,
unsigned skip) {
uint64_t uimm = imm < 0 ? -(uint64_t)imm : (uint64_t)imm;
if (imm < 0)
dst = da_strpcat8(dst, &"], #-0x "[skip], 7 - skip);
else
dst = da_strpcat8(dst, &"], #0x "[skip], 6 - skip);
return da_strpcatuimmhex(dst, uimm);
}
static char* da_strpcatreggp(char* restrict dst, unsigned sf, unsigned idx) {
const char* wstr = "w0\0 w1\0 w2\0 w3\0 w4\0 w5\0 w6\0 w7\0 "
"w8\0 w9\0 w10\0w11\0w12\0w13\0w14\0w15\0"
"w16\0w17\0w18\0w19\0w20\0w21\0w22\0w23\0"
"w24\0w25\0w26\0w27\0w28\0w29\0w30\0wzr";
const char* xstr = "x0\0 x1\0 x2\0 x3\0 x4\0 x5\0 x6\0 x7\0 "
"x8\0 x9\0 x10\0x11\0x12\0x13\0x14\0x15\0"
"x16\0x17\0x18\0x19\0x20\0x21\0x22\0x23\0"
"x24\0x25\0x26\0x27\0x28\0x29\0x30\0xzr";
return da_strpcat4(dst, (sf ? xstr : wstr) + idx * 4, idx >= 10 ? 3 : 2);
}
static char* da_strpcatreggpsp(char* restrict dst, unsigned sf, unsigned idx) {
const char* wstr = "w0\0 w1\0 w2\0 w3\0 w4\0 w5\0 w6\0 w7\0 "
"w8\0 w9\0 w10\0w11\0w12\0w13\0w14\0w15\0"
"w16\0w17\0w18\0w19\0w20\0w21\0w22\0w23\0"
"w24\0w25\0w26\0w27\0w28\0w29\0w30\0wsp";
const char* xstr = "x0\0 x1\0 x2\0 x3\0 x4\0 x5\0 x6\0 x7\0 "
"x8\0 x9\0 x10\0x11\0x12\0x13\0x14\0x15\0"
"x16\0x17\0x18\0x19\0x20\0x21\0x22\0x23\0"
"x24\0x25\0x26\0x27\0x28\0x29\0x30\0sp\0";
unsigned len = idx >= 10 && !(idx == 31 && sf) ? 3 : 2;
return da_strpcat4(dst, (sf ? xstr : wstr) + idx * 4, len);
}
static char* da_strpcatregv(char* restrict dst, unsigned idx) {
const char* vstr = "v0\0 v1\0 v2\0 v3\0 v4\0 v5\0 v6\0 v7\0 "
"v8\0 v9\0 v10\0v11\0v12\0v13\0v14\0v15\0"
"v16\0v17\0v18\0v19\0v20\0v21\0v22\0v23\0"
"v24\0v25\0v26\0v27\0v28\0v29\0v30\0v31";
return da_strpcat4(dst, vstr + 4 * idx, idx >= 10 ? 3 : 2);
}
void da64_format(const struct Da64Inst* ddi, char* buf128) {
if (ddi->mnem == DA64I_UNKNOWN) {
*buf128 = '\0';
return;
}
const char* const mnemstr =
#define DA64_DECSTR
#include "disarm64-private.inc"
#undef DA64_DECSTR
;
static const uint16_t mnemtab[] = {
#define DA64_DECSTRTAB
#include "disarm64-private.inc"
#undef DA64_DECSTRTAB
};
const char* va = ".8b .16b.4h .8h .2s .4s .1d .2d .2h .1q";
char* end = buf128;
if (ddi->mnem < sizeof(mnemtab) / sizeof(mnemtab[0]))
end = da_strpcat12(end, mnemstr + (mnemtab[ddi->mnem] & 0xfff),
mnemtab[ddi->mnem] >> 12);
for (unsigned i = 0; i < sizeof(ddi->ops) / sizeof(ddi->ops[0]); i++) {
if (ddi->ops[i].type == DA_OP_NONE)
break;
if (i && ddi->ops[0].type != DA_OP_COND)
*(end++) = ',', *(end++) = ' ';
else if (i || ddi->ops[0].type != DA_OP_COND)
*(end++) = ' ';
switch (ddi->ops[i].type) {
case DA_OP_REGGP:
end = da_strpcatreggp(end, ddi->ops[i].reggp.sf, ddi->ops[i].reg);
break;
case DA_OP_REGGPINC:
end = da_strpcatreggp(end, ddi->ops[i].reggp.sf, ddi->ops[i].reg);
*end++ = '!';
break;
case DA_OP_REGGPEXT: {
end = da_strpcatreggp(end, ddi->ops[i].reggpext.sf, ddi->ops[i].reg);
static const char* exttbl = ", uxtb\0, uxth\0, uxtw\0, uxtx\0"
", sxtb\0, sxth\0, sxtw\0, sxtx\0"
", lsl\0 , lsr\0 , asr\0 , ror\0 ";
end = da_strpcat8(end, exttbl + ddi->ops[i].reggpext.ext * 7,
5 + (ddi->ops[i].reggpext.ext < 8));
end = da_strpcatimmdecstr(end, ddi->ops[i].reggpext.shift, 0);
break;
}
case DA_OP_REGSP:
end = da_strpcat4(end, &"wsp "[ddi->ops[i].reggp.sf],
3 - ddi->ops[i].reggp.sf);
break;
case DA_OP_REGFP: {
const char* rstr = "b0\0 b1\0 b2\0 b3\0 b4\0 b5\0 b6\0 b7\0 "
"b8\0 b9\0 b10\0b11\0b12\0b13\0b14\0b15\0"
"b16\0b17\0b18\0b19\0b20\0b21\0b22\0b23\0"
"b24\0b25\0b26\0b27\0b28\0b29\0b30\0b31\0"
"h0\0 h1\0 h2\0 h3\0 h4\0 h5\0 h6\0 h7\0 "
"h8\0 h9\0 h10\0h11\0h12\0h13\0h14\0h15\0"
"h16\0h17\0h18\0h19\0h20\0h21\0h22\0h23\0"
"h24\0h25\0h26\0h27\0h28\0h29\0h30\0h31\0"
"s0\0 s1\0 s2\0 s3\0 s4\0 s5\0 s6\0 s7\0 "
"s8\0 s9\0 s10\0s11\0s12\0s13\0s14\0s15\0"
"s16\0s17\0s18\0s19\0s20\0s21\0s22\0s23\0"
"s24\0s25\0s26\0s27\0s28\0s29\0s30\0s31\0"
"d0\0 d1\0 d2\0 d3\0 d4\0 d5\0 d6\0 d7\0 "
"d8\0 d9\0 d10\0d11\0d12\0d13\0d14\0d15\0"
"d16\0d17\0d18\0d19\0d20\0d21\0d22\0d23\0"
"d24\0d25\0d26\0d27\0d28\0d29\0d30\0d31\0"
"q0\0 q1\0 q2\0 q3\0 q4\0 q5\0 q6\0 q7\0 "
"q8\0 q9\0 q10\0q11\0q12\0q13\0q14\0q15\0"
"q16\0q17\0q18\0q19\0q20\0q21\0q22\0q23\0"
"q24\0q25\0q26\0q27\0q28\0q29\0q30\0q31";
unsigned idx = ddi->ops[i].reg;
unsigned sz = ddi->ops[i].regfp.size;
end = da_strpcat4(end, rstr + (sz * 32 + idx) * 4, idx >= 10 ? 3 : 2);
break;
}
case DA_OP_REGVEC:
end = da_strpcatregv(end, ddi->ops[i].reg);
end = da_strpcat4(end, va + 4 * ddi->ops[i].regvec.va,
ddi->ops[i].regvec.va == 1 ? 4 : 3);
break;
case DA_OP_REGVIDX:
end = da_strpcatregv(end, ddi->ops[i].reg);
end = da_strpcat4(
end,
&".b[\0.h[\0.s[\0.d[\0.q[\0.2b[.4b[.2h["[4 *
ddi->ops[i].regvidx.esize],
3 + (ddi->ops[i].regvidx.esize > 4));
end = da_strpcatimmdecstr(end, ddi->ops[i].regvidx.elem, 2);
*(end++) = ']';
break;
case DA_OP_REGVTBL:
*(end++) = '{';
end = da_strpcatregv(end, ddi->ops[i].reg);
end = da_strpcat4(end, va + 4 * ddi->ops[i].regvtbl.va,
ddi->ops[i].regvtbl.va == 1 ? 4 : 3);
if (ddi->ops[i].regvtbl.cnt > 1) {
*(end++) = '-';
end = da_strpcatregv(
end, (ddi->ops[i].reg + ddi->ops[i].regvtbl.cnt - 1) & 31);
end = da_strpcat4(end, va + 4 * ddi->ops[i].regvtbl.va,
ddi->ops[i].regvtbl.va == 1 ? 4 : 3);
}
*(end++) = '}';
break;
case DA_OP_REGVTBLIDX:
*(end++) = '{';
end = da_strpcatregv(end, ddi->ops[i].reg);
end = da_strpcat4(end, &".b.h.s.d "[ddi->ops[i].regvtblidx.esize * 2], 2);
if (ddi->ops[i].regvtbl.cnt > 1) {
*(end++) = '-';
end = da_strpcatregv(
end, (ddi->ops[i].reg + ddi->ops[i].regvtblidx.cnt - 1) & 31);
end =
da_strpcat4(end, &".b.h.s.d "[ddi->ops[i].regvtblidx.esize * 2], 2);
}
end = da_strpcat4(end, " }[", 3);
end = da_strpcatimmdecstr(end, ddi->ops[i].regvtblidx.elem, 2);
*(end++) = ']';
break;
case DA_OP_MEMUOFF:
*(end++) = '[';
end = da_strpcatreggpsp(end, 1, ddi->ops[i].reg);
if (ddi->ops[i].uimm16) {
end = da_strpcat8(end, ", #0x ", 5);
end = da_strpcatuimmhex(end, ddi->ops[i].uimm16);
}
*(end++) = ']';
break;
case DA_OP_MEMSOFF:
*(end++) = '[';
end = da_strpcatreggpsp(end, 1, ddi->ops[i].reg);
if (ddi->ops[i].simm16)
end = da_strpcatsimmhex16(end, ddi->ops[i].simm16, 1);
*(end++) = ']';
break;
case DA_OP_MEMSOFFPRE:
*(end++) = '[';
end = da_strpcatreggpsp(end, 1, ddi->ops[i].reg);
end = da_strpcatsimmhex16(end, ddi->ops[i].simm16, 1);
end = da_strpcat4(end, "]! ", 2);
break;
case DA_OP_MEMSOFFPOST:
*(end++) = '[';
end = da_strpcatreggpsp(end, 1, ddi->ops[i].reg);
end = da_strpcatsimmhex16(end, ddi->ops[i].simm16, 0);
break;
case DA_OP_MEMREG: {
*(end++) = '[';
end = da_strpcatreggpsp(end, 1, ddi->ops[i].reg);
end = da_strpcat4(end, ", ", 2);
end = da_strpcatreggp(end, (ddi->ops[i].memreg.ext & 3) == 3,
ddi->ops[i].memreg.offreg);
// compact option: 2 => 0; 3 => 1; 6 => 2; 7 => 4
unsigned optidx = (ddi->ops[i].memreg.ext - 1) >> 1;
if (!ddi->ops[i].memreg.sc) {
const char* ext = ", uxtw]\0]\0 , sxtw]\0, sxtx]";
end = da_strpcat8(end, ext + 8 * optidx, optidx == 1 ? 1 : 7);
} else {
const char* ext = ", uxtw #0]\0, lsl #0]\0 , sxtw #0]\0, sxtx #0]\0"
", uxtw #1]\0, lsl #1]\0 , sxtw #1]\0, sxtx #1]\0"
", uxtw #2]\0, lsl #2]\0 , sxtw #2]\0, sxtx #2]\0"
", uxtw #3]\0, lsl #3]\0 , sxtw #3]\0, sxtx #3]\0"
", uxtw #4]\0, lsl #4]\0 , sxtw #4]\0, sxtx #4]";
end = da_strpcat12(
end, ext + 11 * (optidx + 4 * ddi->ops[i].memreg.shift), 10);
}
break;
}
case DA_OP_MEMREGPOST:
*(end++) = '[';
end = da_strpcatreggpsp(end, 1, ddi->ops[i].reg);
end = da_strpcat4(end, "], ", 3);
end = da_strpcatreggp(end, 1, ddi->ops[i].memreg.offreg);
break;
case DA_OP_MEMINC:
*(end++) = '[';
end = da_strpcatreggp(end, 1, ddi->ops[i].reg);
end = da_strpcat4(end, "]! ", 2);
break;
case DA_OP_IMMSMALL:
end = da_strpcatimmdecstr(end, ddi->ops[i].uimm16, 1);
break;
case DA_OP_IMMLARGE:
end = da_strpcat4(end, "#0x", 3);
end = da_strpcatuimmhex(end, ddi->imm64);
break;
case DA_OP_SIMM:
end = da_strpcatsimmhex16(end, ddi->ops[i].simm16, 3);
break;
case DA_OP_UIMM:
end = da_strpcat4(end, "#0x", 3);
end = da_strpcatuimmhex(end, ddi->ops[i].uimm16);
break;
case DA_OP_UIMMSHIFT:
end = da_strpcat4(end, "#0x", 3);
end = da_strpcatuimmhex(end, ddi->ops[i].uimm16);
end = da_strpcat8(end, &", lsl, msl "[ddi->ops[i].immshift.mask * 5], 5);
end = da_strpcatimmdecstr(end, ddi->ops[i].immshift.shift, 0);
break;
case DA_OP_IMMFLOAT: {
const char* floattable =
"\x02#2 \x06#2.125 \x05#2.25 \x06#2.375 "
"\x04#2.5 \x06#2.625 \x05#2.75 \x06#2.875 "
"\x02#3 \x06#3.125 \x05#3.25 \x06#3.375 "
"\x04#3.5 \x06#3.625 \x05#3.75 \x06#3.875 "
"\x02#4 \x05#4.25 \x04#4.5 \x05#4.75 "
"\x02#5 \x05#5.25 \x04#5.5 \x05#5.75 "
"\x02#6 \x05#6.25 \x04#6.5 \x05#6.75 "
"\x02#7 \x05#7.25 \x04#7.5 \x05#7.75 "
"\x02#8 \x04#8.5 \x02#9 \x04#9.5 "
"\x03#10 \x05#10.5 \x03#11 \x05#11.5 "
"\x03#12 \x05#12.5 \x03#13 \x05#13.5 "
"\x03#14 \x05#14.5 \x03#15 \x05#15.5 "
"\x03#16 \x03#17 \x03#18 \x03#19 "
"\x03#20 \x03#21 \x03#22 \x03#23 "
"\x03#24 \x03#25 \x03#26 \x03#27 "
"\x03#28 \x03#29 \x03#30 \x03#31 "
"\x06#0.125 \x0a#0.1328125 \x09#0.140625 \x0a#0.1484375 "
"\x08#0.15625 \x0a#0.1640625 \x09#0.171875 \x0a#0.1796875 "
"\x07#0.1875 \x0a#0.1953125 \x09#0.203125 \x0a#0.2109375 "
"\x08#0.21875 \x0a#0.2265625 \x09#0.234375 \x0a#0.2421875 "
"\x05#0.25 \x09#0.265625 \x08#0.28125 \x09#0.296875 "
"\x07#0.3125 \x09#0.328125 \x08#0.34375 \x09#0.359375 "
"\x06#0.375 \x09#0.390625 \x08#0.40625 \x09#0.421875 "
"\x07#0.4375 \x09#0.453125 \x08#0.46875 \x09#0.484375 "
"\x04#0.5 \x08#0.53125 \x07#0.5625 \x08#0.59375 "
"\x06#0.625 \x08#0.65625 \x07#0.6875 \x08#0.71875 "
"\x05#0.75 \x08#0.78125 \x07#0.8125 \x08#0.84375 "
"\x06#0.875 \x08#0.90625 \x07#0.9375 \x08#0.96875 "
"\x02#1 \x07#1.0625 \x06#1.125 \x07#1.1875 "
"\x05#1.25 \x07#1.3125 \x06#1.375 \x07#1.4375 "
"\x04#1.5 \x07#1.5625 \x06#1.625 \x07#1.6875 "
"\x05#1.75 \x07#1.8125 \x06#1.875 \x07#1.9375 "
"\x03#-2 \x07#-2.125 \x06#-2.25 \x07#-2.375 "
"\x05#-2.5 \x07#-2.625 \x06#-2.75 \x07#-2.875 "
"\x03#-3 \x07#-3.125 \x06#-3.25 \x07#-3.375 "
"\x05#-3.5 \x07#-3.625 \x06#-3.75 \x07#-3.875 "
"\x03#-4 \x06#-4.25 \x05#-4.5 \x06#-4.75 "
"\x03#-5 \x06#-5.25 \x05#-5.5 \x06#-5.75 "
"\x03#-6 \x06#-6.25 \x05#-6.5 \x06#-6.75 "
"\x03#-7 \x06#-7.25 \x05#-7.5 \x06#-7.75 "
"\x03#-8 \x05#-8.5 \x03#-9 \x05#-9.5 "
"\x04#-10 \x06#-10.5 \x04#-11 \x06#-11.5 "
"\x04#-12 \x06#-12.5 \x04#-13 \x06#-13.5 "
"\x04#-14 \x06#-14.5 \x04#-15 \x06#-15.5 "
"\x04#-16 \x04#-17 \x04#-18 \x04#-19 "
"\x04#-20 \x04#-21 \x04#-22 \x04#-23 "
"\x04#-24 \x04#-25 \x04#-26 \x04#-27 "
"\x04#-28 \x04#-29 \x04#-30 \x04#-31 "
"\x07#-0.125 \x0b#-0.1328125\x0a#-0.140625 \x0b#-0.1484375"
"\x09#-0.15625 \x0b#-0.1640625\x0a#-0.171875 \x0b#-0.1796875"
"\x08#-0.1875 \x0b#-0.1953125\x0a#-0.203125 \x0b#-0.2109375"
"\x09#-0.21875 \x0b#-0.2265625\x0a#-0.234375 \x0b#-0.2421875"
"\x06#-0.25 \x0a#-0.265625 \x09#-0.28125 \x0a#-0.296875 "
"\x08#-0.3125 \x0a#-0.328125 \x09#-0.34375 \x0a#-0.359375 "
"\x07#-0.375 \x0a#-0.390625 \x09#-0.40625 \x0a#-0.421875 "
"\x08#-0.4375 \x0a#-0.453125 \x09#-0.46875 \x0a#-0.484375 "
"\x05#-0.5 \x09#-0.53125 \x08#-0.5625 \x09#-0.59375 "
"\x07#-0.625 \x09#-0.65625 \x08#-0.6875 \x09#-0.71875 "
"\x06#-0.75 \x09#-0.78125 \x08#-0.8125 \x09#-0.84375 "
"\x07#-0.875 \x09#-0.90625 \x08#-0.9375 \x09#-0.96875 "
"\x03#-1 \x08#-1.0625 \x07#-1.125 \x08#-1.1875 "
"\x06#-1.25 \x08#-1.3125 \x07#-1.375 \x08#-1.4375 "
"\x05#-1.5 \x08#-1.5625 \x07#-1.625 \x08#-1.6875 "
"\x06#-1.75 \x08#-1.8125 \x07#-1.875 \x08#-1.9375 "
"\x04#0.0 ";
const char* floatelem = floattable + 12 * ddi->ops[i].uimm16;
end = da_strpcat12(end, floatelem + 1, *floatelem);
break;
}
case DA_OP_COND: {
const char* cc = "eqnecsccmiplvsvchilsgeltgtlealnv ";
end = da_strpcat4(end, cc + ddi->ops[i].cond * 2, 2);
break;
}
case DA_OP_PRFOP: {
const char* prfstr =
"\x09pldl1keep\x09pldl1strm\x09pldl2keep\x09pldl2strm"
"\x09pldl3keep\x09pldl3strm\x02#6 \x02#7 "
"\x09plil1keep\x09plil1strm\x09plil2keep\x09plil2strm"
"\x09plil3keep\x09plil3strm\x03#14 \x03#15 "
"\x09pstl1keep\x09pstl1strm\x09pstl2keep\x09pstl2strm"
"\x09pstl3keep\x09pstl3strm\x03#22 \x03#23 "
"\x03#24 \x03#25 \x03#26 \x03#27 "
"\x03#28 \x03#29 \x03#30 \x03#31 ";
const char* prfstrelem = prfstr + 10 * ddi->ops[i].prfop;
end = da_strpcat12(end, prfstrelem + 1, *prfstrelem);
break;
}
default: break;
}
}
*end = 0;
}