diff options
Diffstat (limited to 'target-i386/cpu.h')
| -rw-r--r-- | target-i386/cpu.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h index 1cb32ae456..e64569854f 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -698,6 +698,13 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS]; /* Use a clearer name for this. */ #define CPU_INTERRUPT_INIT CPU_INTERRUPT_RESET +/* Instead of computing the condition codes after each x86 instruction, + * QEMU just stores one operand (called CC_SRC), the result + * (called CC_DST) and the type of operation (called CC_OP). When the + * condition codes are needed, the condition codes can be calculated + * using this information. Condition codes are not generated if they + * are only needed for conditional branches. + */ typedef enum { CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */ CC_OP_EFLAGS, /* all cc are explicitly computed, CC_SRC = flags */ |