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stage1: fix f80 negation

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This commit is contained in:
Veikka Tuominen 2022-02-17 17:29:19 +02:00
parent f20929bd8b
commit 6235afc632
2 changed files with 21 additions and 7 deletions
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10
src/stage1/codegen.cpp
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@ -4139,13 +4139,9 @@ static LLVMValueRef ir_render_binary_not(CodeGen *g, Stage1Air *executable,
static LLVMValueRef ir_gen_soft_f80_neg(CodeGen *g, ZigType *op_type, LLVMValueRef operand) {
uint32_t vector_len = op_type->id == ZigTypeIdVector ? op_type->data.vector.len : 0;
uint64_t buf[2] = {0, 0};
if (g->is_big_endian != native_is_big_endian) {
buf[1] = 0x8000000000000000;
} else {
buf[1] = 0x8000;
}
LLVMValueRef sign_mask = LLVMConstIntOfArbitraryPrecision(LLVMInt128Type(), 2, buf);
LLVMTypeRef llvm_i80 = LLVMIntType(80);
LLVMValueRef sign_mask = LLVMConstInt(llvm_i80, 1, false);
sign_mask = LLVMConstShl(sign_mask, LLVMConstInt(llvm_i80, 79, false));
LLVMValueRef result;
if (vector_len == 0) {

18
test/behavior/floatop.zig
View File

@ -448,3 +448,21 @@ fn testTrunc() !void {
try expect(math.approxEqAbs(f32, @trunc(@as(f32, -0.4)), result[3], epsilon));
}
}
test "negation" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
if (builtin.os.tag == .freebsd) return error.SkipZigTest;
const S = struct {
fn doTheTest() !void {
inline for ([_]type{ f16, f32, f64, f80, f128 }) |T| {
var a: T = 1;
a = -a;
try expect(a == -1);
}
}
};
try S.doTheTest();
comptime try S.doTheTest();
}