motiejus/zig
1
Fork 0
Code Releases Activity

compiler-rt: Implement __extendhftf2

Browse Source
This commit is contained in:
LemonBoy
2021-04-15 18:20:50 +02:00
parent 7a4dad7e87
commit b29677dd12
2 changed files with 52 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
lib/std/special/compiler_rt/extendXfYf2.zig
View File

@@ -23,6 +23,10 @@ pub fn __extendhfsf2(a: u16) callconv(.C) f32 {
return @call(.{ .modifier = .always_inline }, extendXfYf2, .{ f32, f16, a });
}
pub fn __extendhftf2(a: u16) callconv(.C) f128 {
return @call(.{ .modifier = .always_inline }, extendXfYf2, .{ f128, f16, a });
}
pub fn __aeabi_h2f(arg: u16) callconv(.AAPCS) f32 {
@setRuntimeSafety(false);
return @call(.{ .modifier = .always_inline }, __extendhfsf2, .{arg});

49
lib/std/special/compiler_rt/extendXfYf2_test.zig
View File

@@ -4,9 +4,10 @@
// The MIT license requires this copyright notice to be included in all copies
// and substantial portions of the software.
const builtin = @import("builtin");
const __extenddftf2 = @import("extendXfYf2.zig").__extenddftf2;
const __extendhfsf2 = @import("extendXfYf2.zig").__extendhfsf2;
const __extendhftf2 = @import("extendXfYf2.zig").__extendhftf2;
const __extendsftf2 = @import("extendXfYf2.zig").__extendsftf2;
const __extenddftf2 = @import("extendXfYf2.zig").__extenddftf2;
fn test__extenddftf2(a: f64, expectedHi: u64, expectedLo: u64) void {
const x = __extenddftf2(a);
@@ -161,3 +162,49 @@ fn makeNaN32(rand: u32) f32 {
fn makeInf32() f32 {
return @bitCast(f32, @as(u32, 0x7f800000));
}
fn test__extendhftf2(a: f16, expectedHi: u64, expectedLo: u64) void {
const x = __extendhftf2(@bitCast(u16, a));
const rep = @bitCast(u128, x);
const hi = @intCast(u64, rep >> 64);
const lo = @truncate(u64, rep);
if (hi == expectedHi and lo == expectedLo)
return;
// test other possible NaN representation(signal NaN)
if (expectedHi == 0x7fff800000000000 and expectedLo == 0x0) {
if ((hi & 0x7fff000000000000) == 0x7fff000000000000 and
((hi & 0xffffffffffff) > 0 or lo > 0))
{
return;
}
}
@panic("__extendhftf2 test failure");
}
test "extendhftf2" {
// qNaN
test__extendhftf2(@bitCast(f16, @as(u16, 0x7e00)), 0x7fff800000000000, 0x0);
// NaN
test__extendhftf2(@bitCast(f16, @as(u16, 0x7d00)), 0x7fff400000000000, 0x0);
// inf
test__extendhftf2(@bitCast(f16, @as(u16, 0x7c00)), 0x7fff000000000000, 0x0);
test__extendhftf2(-@bitCast(f16, @as(u16, 0x7c00)), 0xffff000000000000, 0x0);
// zero
test__extendhftf2(@bitCast(f16, @as(u16, 0x0)), 0x0, 0x0);
test__extendhftf2(@bitCast(f16, @as(u16, 0x8000)), 0x8000000000000000, 0x0);
// denormal
test__extendhftf2(@bitCast(f16, @as(u16, 0x0010)), 0x3feb000000000000, 0x0000000000000000);
test__extendhftf2(@bitCast(f16, @as(u16, 0x0001)), 0x3fe7000000000000, 0x0000000000000000);
test__extendhftf2(@bitCast(f16, @as(u16, 0x8001)), 0xbfe7000000000000, 0x0000000000000000);
// pi
test__extendhftf2(@bitCast(f16, @as(u16, 0x4248)), 0x4000920000000000, 0x0000000000000000);
test__extendhftf2(@bitCast(f16, @as(u16, 0xc248)), 0xc000920000000000, 0x0000000000000000);
test__extendhftf2(@bitCast(f16, @as(u16, 0x508c)), 0x4004230000000000, 0x0);
test__extendhftf2(@bitCast(f16, @as(u16, 0x1bb7)), 0x3ff6edc000000000, 0x0);
}