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remove stage1 workaround for big int set

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Underlying fix should have been d7b029995c.

u128 limb sizes are still not fully tested as we are missing compiler-rt
support (__divei4, __modei4 on x86_64). Should be no zig blockers so the
assertion has been removed.
This commit is contained in:
Marc Tiehuis 2023-02-04 10:58:03 +13:00 committed by Andrew Kelley
parent c9b957c937
commit 4009e0d2b1
2 changed files with 3 additions and 9 deletions
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1
lib/std/math/big.zig
View File

@ -13,7 +13,6 @@ pub const Log2Limb = std.math.Log2Int(Limb);
comptime { comptime {
assert(std.math.floorPowerOfTwo(usize, limb_info.bits) == limb_info.bits); assert(std.math.floorPowerOfTwo(usize, limb_info.bits) == limb_info.bits);
assert(limb_info.bits <= 64); // u128 set is unsupported
assert(limb_info.signedness == .unsigned); assert(limb_info.signedness == .unsigned);
} }

11
lib/std/math/big/int.zig
View File

@ -30,7 +30,7 @@ pub fn calcLimbLen(scalar: anytype) usize {
} }
const w_value = std.math.absCast(scalar); const w_value = std.math.absCast(scalar);
return @divFloor(@intCast(Limb, math.log2(w_value)), limb_bits) + 1; return @intCast(usize, @divFloor(@intCast(Limb, math.log2(w_value)), limb_bits) + 1);
} }
pub fn calcToStringLimbsBufferLen(a_len: usize, base: u8) usize { pub fn calcToStringLimbsBufferLen(a_len: usize, base: u8) usize {
@ -238,10 +238,7 @@ pub const Mutable = struct {
var i: usize = 0; var i: usize = 0;
while (true) : (i += 1) { while (true) : (i += 1) {
self.limbs[i] = @truncate(Limb, w_value); self.limbs[i] = @truncate(Limb, w_value);
w_value >>= limb_bits;
// TODO: shift == 64 at compile-time fails. Fails on u128 limbs.
w_value >>= limb_bits / 2;
w_value >>= limb_bits / 2;
if (w_value == 0) break; if (w_value == 0) break;
} }
@ -258,9 +255,7 @@ pub const Mutable = struct {
comptime var i = 0; comptime var i = 0;
inline while (true) : (i += 1) { inline while (true) : (i += 1) {
self.limbs[i] = w_value & mask; self.limbs[i] = w_value & mask;
w_value >>= limb_bits;
w_value >>= limb_bits / 2;
w_value >>= limb_bits / 2;
if (w_value == 0) break; if (w_value == 0) break;
} }