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Add __aeabi_{f,d}neg and __neg{s,d,X}f2 to compiler-rt

master
vegecode 2019-03-22 22:51:25 -05:00
parent 38c2093500
commit 779137be41
3 changed files with 28 additions and 0 deletions
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1
CMakeLists.txt
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@ -664,6 +664,7 @@ set(ZIG_STD_FILES
"special/compiler_rt/muloti4.zig"
"special/compiler_rt/mulXf3.zig"
"special/compiler_rt/multi3.zig"
"special/compiler_rt/negXf2.zig"
"special/compiler_rt/popcountdi2.zig"
"special/compiler_rt/truncXfYf2.zig"
"special/compiler_rt/udivmod.zig"

6
std/special/compiler_rt.zig
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@ -82,6 +82,9 @@ comptime {
@export("__umoddi3", __umoddi3, linkage);
@export("__udivmodsi4", __udivmodsi4, linkage);
@export("__negsf2", @import("compiler_rt/negXf2.zig").__negsf2, linkage);
@export("__negdf2", @import("compiler_rt/negXf2.zig").__negdf2, linkage);
if (is_arm_arch and !is_arm_64) {
@export("__aeabi_uldivmod", __aeabi_uldivmod, linkage);
@export("__aeabi_uidivmod", __aeabi_uidivmod, linkage);
@ -107,6 +110,9 @@ comptime {
@export("__aeabi_memcmp4", __aeabi_memcmp, linkage);
@export("__aeabi_memcmp8", __aeabi_memcmp, linkage);
@export("__aeabi_fneg", @import("compiler_rt/negXf2.zig").__negsf2, linkage);
@export("__aeabi_dneg", @import("compiler_rt/negXf2.zig").__negdf2, linkage);
@export("__aeabi_fadd", @import("compiler_rt/addXf3.zig").__addsf3, linkage);
@export("__aeabi_dadd", @import("compiler_rt/addXf3.zig").__adddf3, linkage);
@export("__aeabi_fsub", @import("compiler_rt/addXf3.zig").__subsf3, linkage);

21
std/special/compiler_rt/negXf2.zig Normal file
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@ -0,0 +1,21 @@
const std = @import("std");
pub extern fn __negsf2(a: f32) f32 {
return negXf2(f32, a);
}
pub extern fn __negdf2(a: f64) f64 {
return negXf2(f64, a);
}
fn negXf2(comptime T: type, a: T) T {
const Z = @IntType(false, T.bit_count);
const typeWidth = T.bit_count;
const significandBits = std.math.floatMantissaBits(T);
const exponentBits = std.math.floatExponentBits(T);
const signBit = (Z(1) << (significandBits + exponentBits));
return @bitCast(T, @bitCast(Z, a) ^ signBit);
}