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Builder: fix float constants in llvm ir

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This commit is contained in:
Jacob Young
2024-02-22 23:51:35 +01:00
parent 83e66d301e
commit dbfa3238fe
2 changed files with 49 additions and 27 deletions
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22
src/codegen/llvm/Builder.zig
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@@ -7220,17 +7220,31 @@ pub const Constant = enum(u32) {
};
}
};
const Mantissa64 = std.meta.FieldType(Float.Repr(f64), .mantissa);
const Exponent32 = std.meta.FieldType(Float.Repr(f32), .exponent);
const Exponent64 = std.meta.FieldType(Float.Repr(f64), .exponent);
const repr: Float.Repr(f32) = @bitCast(item.data);
const denormal_shift = switch (repr.exponent) {
std.math.minInt(Exponent32) => @as(
std.math.Log2Int(Mantissa64),
@clz(repr.mantissa),
) + 1,
else => 0,
};
try writer.print("0x{X:0>16}", .{@as(u64, @bitCast(Float.Repr(f64){
.mantissa = std.math.shl(
std.meta.FieldType(Float.Repr(f64), .mantissa),
Mantissa64,
repr.mantissa,
std.math.floatMantissaBits(f64) - std.math.floatMantissaBits(f32),
std.math.floatMantissaBits(f64) - std.math.floatMantissaBits(f32) +
denormal_shift,
),
.exponent = switch (repr.exponent) {
std.math.minInt(Exponent32) => std.math.minInt(Exponent64),
std.math.minInt(Exponent32) => if (repr.mantissa > 0)
@as(Exponent64, std.math.floatExponentMin(f32) +
std.math.floatExponentMax(f64)) - denormal_shift
else
std.math.minInt(Exponent64),
else => @as(Exponent64, repr.exponent) +
(std.math.floatExponentMax(f64) - std.math.floatExponentMax(f32)),
std.math.maxInt(Exponent32) => std.math.maxInt(Exponent64),
@@ -9920,7 +9934,7 @@ pub fn printUnbuffered(
.scope = extra.file,
.file = extra.file,
.line = extra.line,
.type = null,
.type = extra.ty,
.scopeLine = extra.scope_line,
.containingType = null,
.virtualIndex = null,