fix(asm): match RISC-V branch and jump encodings

2026-08-13 17:57:10 +02:00
parent 31a2cee382
commit 681a449c01
6 changed files with 62 additions and 72 deletions
@@ -0,0 +1,35 @@
+// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include "textflag.h"
+
+TEXT ·branches(SB), NOSPLIT, $0
+	ADDI $1, X10, X10
+	BEQ X10, X11, beq_done
+	ADDI $2, X10, X10
+beq_done:
+	BNE X10, X11, bne_done
+	ADDI $3, X10, X10
+bne_done:
+	BLT X10, X11, blt_done
+	ADDI $4, X10, X10
+blt_done:
+	BGE X10, X11, bge_done
+	ADDI $5, X10, X10
+bge_done:
+	BLTU X10, X11, bltu_done
+	ADDI $6, X10, X10
+bltu_done:
+	BGEU X10, X11, bgeu_done
+	ADDI $7, X10, X10
+bgeu_done:
+	RET
+
+TEXT ·jumps(SB), NOSPLIT, $0
+	JMP done
+	ADDI $1, X10, X10
+done:
+	JAL X11, skip
+	ADDI $2, X10, X10
+skip:
+	RET