mirrors/Odin
1
0
Fork 0
mirror of https://github.com/odin-lang/Odin.git synced 2026-07-21 07:01:09 +00:00
Code Issues Packages Projects Releases Wiki Activity

rexcode/arm64: NEON three-different (long) encode forms

Browse Source 
Adds 26 widening long mnemonics (72 forms) via specgen: SADDL/UADDL/SSUBL/USUBL, SMULL/UMULL, SMLAL/UMLAL/SMLSL/UMLSL, SQDMULL/SQDMLAL/SQDMLSL and their high-half '2' variants. Destination arrangement is wider than the sources (Vd.8H, Vn.8B, Vm.8B; the '2' forms read the high half). Encoding stays VD/VN/VM, so no encoder change.

specgen gains a mixed-arrangement THREE_DIFF shape (low/high source-half pairs). Verified: decode round-trips (SMULL/SADDL2/SQDMULL/UMLAL), arm64 check + 461 tests pass.
This commit is contained in:
Brendan Punsky
2026-06-15 21:16:56 -04:00
committed by Flāvius
parent 00b666bbc0
commit f78a3a5573
9 changed files with 1307 additions and 858 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
core/rexcode/arm64/tablegen/specgen.lua
View File

@@ -109,6 +109,55 @@ for _, fam in ipairs(FAMILIES) do
sections[#sections+1] = string.format("\t// %s.\n%s", fam.title, table.concat(blocks, "\n"))
end
-- Advanced SIMD three-different (long): Vd.<wide>, Vn.<narrow>, Vm.<narrow>.
-- Base mnemonics use the low-half source arrangement; the "2" variants use the
-- high half. enc stays VD/VN/VM; only the operand arrangements differ.
local LONG_LOW = {{"8H","8B"},{"4S","4H"},{"2D","2S"}}
local LONG_HIGH = {{"8H","16B"},{"4S","8H"},{"2D","4S"}}
local THREE_DIFF = {
{"SADDL","saddl",LONG_LOW}, {"SADDL2","saddl2",LONG_HIGH},
{"UADDL","uaddl",LONG_LOW}, {"UADDL2","uaddl2",LONG_HIGH},
{"SSUBL","ssubl",LONG_LOW}, {"SSUBL2","ssubl2",LONG_HIGH},
{"USUBL","usubl",LONG_LOW}, {"USUBL2","usubl2",LONG_HIGH},
{"SMULL_V","smull",LONG_LOW}, {"SMULL2_V","smull2",LONG_HIGH},
{"UMULL_V","umull",LONG_LOW}, {"UMULL2_V","umull2",LONG_HIGH},
{"SMLAL","smlal",LONG_LOW}, {"SMLAL2","smlal2",LONG_HIGH},
{"UMLAL","umlal",LONG_LOW}, {"UMLAL2","umlal2",LONG_HIGH},
{"SMLSL","smlsl",LONG_LOW}, {"SMLSL2","smlsl2",LONG_HIGH},
{"UMLSL","umlsl",LONG_LOW}, {"UMLSL2","umlsl2",LONG_HIGH},
{"SQDMULL","sqdmull",LONG_LOW}, {"SQDMULL2","sqdmull2",LONG_HIGH},
{"SQDMLAL","sqdmlal",LONG_LOW}, {"SQDMLAL2","sqdmlal2",LONG_HIGH},
{"SQDMLSL","sqdmlsl",LONG_LOW}, {"SQDMLSL2","sqdmlsl2",LONG_HIGH},
}
do
local dblocks = {}
for _, it in ipairs(THREE_DIFF) do
local mnem, llvm, pairs = it[1], it[2], it[3]
local rows = {}
for _, pr in ipairs(pairs) do
local d, s = pr[1], pr[2]
local da, sa = ARR[d].asm, ARR[s].asm
local function mk(r) return string.format("%s v%d.%s, v%d.%s, v%d.%s", llvm, r,da, r,sa, r,sa) end
local w0, w31 = word(mk(0)), word(mk(31))
if w0 and w31 then
local mask = bit.band(bit.bnot(bit.bxor(w0, w31)), 0xFFFFFFFF)
rows[#rows+1] = string.format(
"\t\t{.%s, {.%s, .%s, .%s, .NONE}, {.VD, .VN, .VM, .NONE}, 0x%s, 0x%s, .NEON, {}},",
mnem, ARR[d].vt, ARR[s].vt, ARR[s].vt,
bit.tohex(w0):upper(), bit.tohex(mask):upper())
n_forms = n_forms + 1
else
skips[#skips+1] = mnem.." "..d.."<-"..s
end
end
if #rows > 0 then
dblocks[#dblocks+1] = string.format("\t.%s = {\n%s\n\t},", mnem, table.concat(rows, "\n"))
n_mnem = n_mnem + 1
end
end
sections[#sections+1] = "\t// Advanced SIMD three-different (long).\n" .. table.concat(dblocks, "\n")
end
local region = "\t// SPECGEN:BEGIN\n" .. table.concat(sections, "\n\n") .. "\n\t// SPECGEN:END"
local fh = assert(io.open(TABLE, "r")); local src = fh:read("*a"); fh:close()