From d50af2e474281a1e88d191f783c2792824698974 Mon Sep 17 00:00:00 2001
From: hachem <im@hachem.wtf>
Date: Thu, 10 Sep 2026 05:52:08 +0200
Subject: feat: conditional select

---
 docs/language.md | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'docs/language.md')

diff --git a/docs/language.md b/docs/language.md
index a4743b3..ecdbf19 100644
--- a/docs/language.md
+++ b/docs/language.md
@@ -171,6 +171,12 @@ while .countdown rcx > 0     // emits `.countdown:` … `jmp .countdown` … `.c
     rcx -= 1
 ```
 
+A **conditional select** picks one of two register values without a branch: `dst = a if <cond> else b`. It lowers to `csel` on AArch64 (one instruction) and `cmov` on x86 (a default move plus a conditional move, arranged so `dst` may safely alias either source). Both sources must be registers.
+
+```hdass
+r3 = r1 if r1 > r2 else r2   // r3 = max(r1, r2), branchless
+```
+
 ## Dereference (`^`)
 
 `^reg` is the memory at the address in `reg` — NASM's `[reg]`. On the left of `=` it stores there. The store width comes from the value operand, so a sized sub-register picks the size:
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