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[v6,04/24] target/m68k: Update FPSR.EXC

Message ID 20250511203546.139788-5-richard.henderson@linaro.org
State New
Headers show
Series target/m68k: fpu improvements | expand

Commit Message

Richard Henderson May 11, 2025, 8:35 p.m. UTC 
So far we've only been updating the AEXC byte.
Update the EXC byte as well.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/m68k/fpu_helper.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)
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Patch

diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c
index 195281f118..deae94b0ee 100644
--- a/target/m68k/fpu_helper.c
+++ b/target/m68k/fpu_helper.c
@@ -168,26 +168,28 @@  static void update_fpsr(CPUM68KState *env, int cc)
     uint32_t fpsr = env->fpsr;
     int flags = get_float_exception_flags(&env->fp_status);
 
-    fpsr &= ~FPSR_CC_MASK;
+    fpsr &= ~(FPSR_CC_MASK | FPSR_EXC_MASK);
     fpsr |= cc;
 
     if (flags) {
         set_float_exception_flags(0, &env->fp_status);
 
-        if (flags & float_flag_invalid) {
-            fpsr |= FPSR_AEXP_IOP;
+        if (flags & float_flag_invalid_snan) {
+            fpsr |= FPSR_EXC_SNAN | FPSR_AEXP_IOP;
+        } else if (flags & float_flag_invalid) {
+            fpsr |= FPSR_EXC_OPERR | FPSR_AEXP_IOP;
         }
         if (flags & float_flag_overflow) {
-            fpsr |= FPSR_AEXP_OVFL;
+            fpsr |= FPSR_EXC_OVFL | FPSR_AEXP_OVFL;
         }
         if (flags & (float_flag_underflow | float_flag_output_denormal_flushed)) {
-            fpsr |= FPSR_AEXP_UNFL;
+            fpsr |= FPSR_EXC_UNFL | FPSR_AEXP_UNFL;
         }
         if (flags & float_flag_divbyzero) {
-            fpsr |= FPSR_AEXP_DZ;
+            fpsr |= FPSR_EXC_DZ | FPSR_AEXP_DZ;
         }
         if (flags & float_flag_inexact) {
-            fpsr |= FPSR_AEXC_INEX;
+            fpsr |= FPSR_EXC_INEX2 | FPSR_AEXC_INEX;
         }
     }
     env->fpsr = fpsr;