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[v8,56/87] target/mips: Adjust set_pc() for nanoMIPS

Message ID 1534182832-554-57-git-send-email-aleksandar.markovic@rt-rk.com
State New
Headers show
Series Add nanoMIPS support to QEMU | expand

Commit Message

Aleksandar Markovic Aug. 13, 2018, 5:53 p.m. UTC 
From: James Hogan <james.hogan@mips.com>

ERET and ERETNC shouldn't clear MIPS_HFLAG_M16 for nanoMIPS since there
is no ISA bit, so fix set_pc() to skip the hflags update.

Signed-off-by: James Hogan <james.hogan@mips.com>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
---
 target/mips/op_helper.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/target/mips/op_helper.c b/target/mips/op_helper.c
index b3eef9f..53c1eea 100644
--- a/target/mips/op_helper.c
+++ b/target/mips/op_helper.c
@@ -2392,6 +2392,9 @@  static void debug_post_eret(CPUMIPSState *env)
 static void set_pc(CPUMIPSState *env, target_ulong error_pc)
 {
     env->active_tc.PC = error_pc & ~(target_ulong)1;
+    if (env->insn_flags & ISA_NANOMIPS32) {
+        return;
+    }
     if (error_pc & 1) {
         env->hflags |= MIPS_HFLAG_M16;
     } else {