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Change hashing rules for float-like types to make 0 == -0

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gingerBill
2025-04-16 10:52:35 +01:00
parent 990cc56974
commit 3dcc22fa6d
5 changed files with 132 additions and 4 deletions
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src/llvm_backend.cpp
+47
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@@ -563,6 +563,53 @@ gb_internal lbValue lb_hasher_proc_for_type(lbModule *m, Type *type) {
lbValue res = lb_emit_runtime_call(p, "default_hasher_string", args);
lb_add_callsite_force_inline(p, res);
LLVMBuildRet(p->builder, res.value);
} else if (is_type_float(type)) {
lbValue ptr = lb_emit_conv(p, data, pt);
lbValue v = lb_emit_load(p, ptr);
v = lb_emit_conv(p, v, t_f64);
auto args = array_make<lbValue>(temporary_allocator(), 2);
args[0] = v;
args[1] = seed;
lbValue res = lb_emit_runtime_call(p, "default_hasher_f64", args);
lb_add_callsite_force_inline(p, res);
LLVMBuildRet(p->builder, res.value);
} else if (is_type_complex(type)) {
lbValue ptr = lb_emit_conv(p, data, pt);
lbValue xp = lb_emit_struct_ep(p, ptr, 0);
lbValue yp = lb_emit_struct_ep(p, ptr, 1);
lbValue x = lb_emit_conv(p, lb_emit_load(p, xp), t_f64);
lbValue y = lb_emit_conv(p, lb_emit_load(p, yp), t_f64);
auto args = array_make<lbValue>(temporary_allocator(), 3);
args[0] = x;
args[1] = y;
args[2] = seed;
lbValue res = lb_emit_runtime_call(p, "default_hasher_complex128", args);
lb_add_callsite_force_inline(p, res);
LLVMBuildRet(p->builder, res.value);
} else if (is_type_quaternion(type)) {
lbValue ptr = lb_emit_conv(p, data, pt);
lbValue xp = lb_emit_struct_ep(p, ptr, 0);
lbValue yp = lb_emit_struct_ep(p, ptr, 1);
lbValue zp = lb_emit_struct_ep(p, ptr, 2);
lbValue wp = lb_emit_struct_ep(p, ptr, 3);
lbValue x = lb_emit_conv(p, lb_emit_load(p, xp), t_f64);
lbValue y = lb_emit_conv(p, lb_emit_load(p, yp), t_f64);
lbValue z = lb_emit_conv(p, lb_emit_load(p, zp), t_f64);
lbValue w = lb_emit_conv(p, lb_emit_load(p, wp), t_f64);
auto args = array_make<lbValue>(temporary_allocator(), 5);
args[0] = x;
args[1] = y;
args[2] = z;
args[3] = w;
args[4] = seed;
lbValue res = lb_emit_runtime_call(p, "default_hasher_quaternion256", args);
lb_add_callsite_force_inline(p, res);
LLVMBuildRet(p->builder, res.value);
} else {
GB_PANIC("Unhandled type for hasher: %s", type_to_string(type));
}