Fix display for fixed xmm0/ymm0, SSE redundant prefixes

All singleton registers need to be displayable from register flags
alone!

When using the new 0360..0363 codes, make sure we appropriate avoid
displaying the legacy use of the prefixes.

diff --git a/disasm.c b/disasm.c
index 81e6d07..95fe2ad 100644 (file)
--- a/disasm.c
+++ b/disasm.c
@@ -114,6 +114,10 @@ static enum reg_enum whichreg(int32_t regflags, int regval, int rex)
         return R_RCX;
     if (!(FPU0 & ~regflags))
         return R_ST0;
+    if (!(XMM0 & ~regflags))
+       return R_XMM0;
+    if (!(YMM0 & ~regflags))
+       return R_YMM0;
     if (!(REG_CS & ~regflags))
         return (regval == 1) ? R_CS : 0;
     if (!(REG_DESS & ~regflags))
@@ -884,16 +888,19 @@ static int matches(const struct itemplate *t, uint8_t *data,
        case 0361:
            if (!prefix->osp || prefix->rep)
                return false;
+           o_used = true;
            break;
 
        case 0362:
            if (prefix->osp || prefix->rep != 0xf2)
                return false;
+           drep = 0;
            break;
 
        case 0363:
            if (prefix->osp || prefix->rep != 0xf3)
                return false;
+           drep = 0;
            break;
 
        case 0364: