From 4fb7971f4b419c9c5cac5cdeaf4b32162caa9a49 Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Thu, 17 Aug 2000 23:46:43 +0000 Subject: [PATCH] Allow illegal shifts by zero to be recorded as logical shift lefts by zero. --- gas/ChangeLog | 5 +++++ gas/config/tc-arm.c | 18 ++++++++++++------ 2 files changed, 17 insertions(+), 6 deletions(-) diff --git a/gas/ChangeLog b/gas/ChangeLog index 03c7e97a67c..2e767f0e2e7 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,8 @@ +2000-08-17 Nick Clifton + + * config/tc-arm.c (decode_shift): Allow illegal shifts by zero + to be recoded as logical shift lefts by zero. + 2000-08-16 Jim Wilson * config/tc-ia64.c (specify_resource, case IA64_RS_GR): Handle diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c index a2ae26f8c55..8af25e621fe 100644 --- a/gas/config/tc-arm.c +++ b/gas/config/tc-arm.c @@ -2531,7 +2531,7 @@ decode_shift (str, unrestrict) char ** str; int unrestrict; { - struct asm_shift_name * shift; + const struct asm_shift_name * shift; char * p; char c; @@ -2548,7 +2548,7 @@ decode_shift (str, unrestrict) c = * p; * p = '\0'; - shift = (struct asm_shift_name *) hash_find (arm_shift_hsh, * str); + shift = (const struct asm_shift_name *) hash_find (arm_shift_hsh, * str); * p = c; if (shift == NULL) @@ -2602,10 +2602,16 @@ decode_shift (str, unrestrict) || (num == 32 && shift->properties->allows_32 == 0) ) { - /* As a special case we allow ROR #0, but we issue a message - reminding the programmer that this is actually an RRX. */ - if (num == 0 && shift->properties->index == SHIFT_ROR) - as_tsktsk (_("ROR #0 is actually RRX")); + /* As a special case we allow a shift of zero for + modes that do not support it to be recoded as an + logical shift left of zero (ie nothing). We warn + about this though. */ + if (num == 0) + { + as_tsktsk (_("Shift of 0 ignored.")); + shift = shift_names; + assert (shift->properties->index == SHIFT_LSL); + } else { inst.error = _("Invalid immediate shift"); -- 2.30.2