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[decompiler] Support accessing 128-bit bitfields (#514)

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* support some 128-bit bitfield stuff

* fix bug

* support type stuff correctly
This commit is contained in:
water111
2021-05-21 20:36:04 -04:00
committed by GitHub
parent 6ac399ca33
commit 3fbdd662dc
14 changed files with 497 additions and 279 deletions
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test/decompiler/test_FormExpressionBuild2.cpp
+84
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@@ -1142,4 +1142,88 @@ TEST_F(FormRegressionTest, Method11FontContext) {
" arg0\n"
" )";
test_with_expr(func, type, expected);
}
// 128-bit bitfields, also type for pextuw
TEST_F(FormRegressionTest, Method4ResTag) {
std::string func =
"sll r0, r0, 0\n"
"L135:\n"
" pcpyud v1, a0, r0\n"
" dsrl32 v1, v1, 31\n"
" bne v1, r0, L136\n"
" sll r0, r0, 0\n"
" pcpyud v1, a0, r0\n"
" dsll v1, v1, 1\n"
" dsrl32 v1, v1, 17\n"
" dsll v0, v1, 2\n"
" beq r0, r0, L137\n"
" sll r0, r0, 0\n"
"L136:\n"
" pcpyud v1, a0, r0\n"
" dsll v1, v1, 1\n"
" dsrl32 v1, v1, 17\n"
" pextuw a0, r0, a0\n"
" lhu a0, 8(a0)\n"
" multu3 v0, v1, a0\n"
"L137:\n"
" jr ra\n"
" daddu sp, sp, r0";
std::string type = "(function res-tag int)";
std::string expected =
"(the-as int (if (zero? (-> arg0 inlined?))\n"
" (* (-> arg0 elt-count) 4)\n"
" (* (the-as uint (-> arg0 elt-count)) (-> arg0 elt-type size))\n"
" )\n"
" )";
test_with_expr(func, type, expected);
}
TEST_F(FormRegressionTest, Method2Vec4s) {
std::string func =
"sll r0, r0, 0\n"
" daddiu sp, sp, -32\n"
" sd ra, 0(sp)\n"
" sd fp, 8(sp)\n"
" or fp, t9, r0\n"
" sq gp, 16(sp)\n"
" por gp, a0, r0\n"
" lw t9, format(s7)\n"
" daddiu a0, s7, #t\n"
" daddiu a1, fp, L344\n"
" sllv a2, gp, r0\n"
" dsra32 a3, gp, 0\n"
" pcpyud v1, gp, r0\n"
" sllv t0, v1, r0\n"
" pcpyud v1, gp, r0\n"
" dsra32 t1, v1, 0\n"
" por t2, gp, r0\n"
" jalr ra, t9\n"
" sll v0, ra, 0\n"
" por v0, gp, r0\n"
" ld ra, 0(sp)\n"
" ld fp, 8(sp)\n"
" lq gp, 16(sp)\n"
" jr ra\n"
" daddiu sp, sp, 32";
std::string type = "(function vec4s vec4s)";
std::string expected =
"(begin\n"
" (format\n"
" #t\n"
" \"#<vector ~F ~F ~F ~F @ #x~X>\"\n"
" (-> arg0 x)\n"
" (-> arg0 y)\n"
" (-> arg0 z)\n"
" (-> arg0 w)\n"
" arg0\n"
" )\n"
" arg0\n"
" )";
test_with_expr(func, type, expected, false, "", {{"L344", "#<vector ~F ~F ~F ~F @ #x~X>"}});
}