From 67d04a988a06f52f4abca848f3579a8037070afe Mon Sep 17 00:00:00 2001 From: Veikka Tuominen Date: Wed, 19 Jan 2022 18:47:51 +0200 Subject: std: add f80 bits --- lib/std/math.zig | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'lib/std/math.zig') diff --git a/lib/std/math.zig b/lib/std/math.zig index cb911b1263..59532d7ab2 100644 --- a/lib/std/math.zig +++ b/lib/std/math.zig @@ -43,7 +43,21 @@ pub const f128_max = @bitCast(f128, @as(u128, 0x7FFEFFFFFFFFFFFFFFFFFFFFFFFFFFFF pub const f128_epsilon = @bitCast(f128, @as(u128, 0x3F8F0000000000000000000000000000)); pub const f128_toint = 1.0 / f128_epsilon; +const F80Repr = if (@import("builtin").cpu.arch.endian() == .Little) extern struct { + fraction: u64, + exp: u16, +} else extern struct { + exp: u16, + fraction: u64, +}; + // float.h details +pub const f80_true_min = @ptrCast(*const f80, &F80Repr{ .fraction = 1, .exp = 0 }).*; +pub const f80_min = @ptrCast(*const f80, &F80Repr{ .fraction = 0x8000000000000000, .exp = 1 }).*; +pub const f80_max = @ptrCast(*const f80, &F80Repr{ .fraction = 0xFFFFFFFFFFFFFFFF, .exp = 0x7FFE }).*; +pub const f80_epsilon = @ptrCast(*const f80, &F80Repr{ .fraction = 0x8000000000000000, .exp = 0x3FC0 }).*; +pub const f80_toint = 1.0 / f80_epsilon; + pub const f64_true_min = 4.94065645841246544177e-324; pub const f64_min = 2.2250738585072014e-308; pub const f64_max = 1.79769313486231570815e+308; @@ -91,6 +105,10 @@ pub const qnan_f64 = @bitCast(f64, qnan_u64); pub const inf_u64 = @as(u64, 0x7FF << 52); pub const inf_f64 = @bitCast(f64, inf_u64); +pub const inf_f80 = @ptrCast(*const f80, &F80Repr{ .fraction = 0x8000000000000000, .exp = 0x7fff }).*; +pub const nan_f80 = @ptrCast(*const f80, &F80Repr{ .fraction = 0xA000000000000000, .exp = 0x7fff }).*; +pub const qnan_f80 = @ptrCast(*const f80, &F80Repr{ .fraction = 0xC000000000000000, .exp = 0x7fff }).*; + pub const nan_u128 = @as(u128, 0x7fff0000000000000000000000000001); pub const nan_f128 = @bitCast(f128, nan_u128); -- cgit v1.2.3