update env docs for Machete (#3960)

Sunny-bot1 · web-flow · commit fa2369271d55 · 2025-09-08T14:44:52.000+08:00
diff --git a/docs/usage/environment_variables.md b/docs/usage/environment_variables.md
@@ -72,5 +72,7 @@ environment_variables: dict[str, Callable[[], Any]] = {
     "FD_USE_DEEP_GEMM":
     lambda: bool(int(os.getenv("FD_USE_DEEP_GEMM", "0"))),
 
+    # Whether to use Machete for wint4 dense GEMM.
+    "FD_USE_MACHETE": lambda: os.getenv("FD_USE_MACHETE", "0"),
 }
 ```
diff --git a/docs/zh/usage/environment_variables.md b/docs/zh/usage/environment_variables.md
@@ -71,5 +71,8 @@ environment_variables: dict[str, Callable[[], Any]] = {
     # 是否使用DeepGemm后端的FP8 blockwise MoE.
     "FD_USE_DEEP_GEMM":
     lambda: bool(int(os.getenv("FD_USE_DEEP_GEMM", "0"))),
+
+    # 是否使用 Machete 后端的 wint4 GEMM.
+    "FD_USE_MACHETE": lambda: os.getenv("FD_USE_MACHETE", "0"),
 }
 ```

Original file line number	Diff line number	Diff line change
`@@ -72,5 +72,7 @@ environment_variables: dict[str, Callable[[], Any]] = {`
`72`	`72`	`"FD_USE_DEEP_GEMM":`
`73`	`73`	`lambda: bool(int(os.getenv("FD_USE_DEEP_GEMM", "0"))),`
`74`	`74`
	`75`	`+ # Whether to use Machete for wint4 dense GEMM.`
	`76`	`+ "FD_USE_MACHETE": lambda: os.getenv("FD_USE_MACHETE", "0"),`
`75`	`77`	`}`
`76`	`78`	```
Original file line number	Diff line number	Diff line change
`@@ -71,5 +71,8 @@ environment_variables: dict[str, Callable[[], Any]] = {`
`71`	`71`	`# 是否使用DeepGemm后端的FP8 blockwise MoE.`
`72`	`72`	`"FD_USE_DEEP_GEMM":`
`73`	`73`	`lambda: bool(int(os.getenv("FD_USE_DEEP_GEMM", "0"))),`
	`74`	`+`
	`75`	`+ # 是否使用 Machete 后端的 wint4 GEMM.`
	`76`	`+ "FD_USE_MACHETE": lambda: os.getenv("FD_USE_MACHETE", "0"),`
`74`	`77`	`}`
`75`	`78`	```