From afc78fc626220619b70051030a1096945ad93e73 Mon Sep 17 00:00:00 2001 From: rsandifo Date: Fri, 19 Jan 2007 13:34:59 +0000 Subject: [PATCH] gcc/ 200x-xx-xx Sandra Loosemore * longlong.h (count_leading_zeros, COUNT_LEADING_ZEROS_0): Add ColdFire alternatives. * config/m68k/m68k.h (CLZ_DEFINED_VALUE_AT_ZERO): New macro. * config/m68k/m68k.md (clzsi2): Define for ColdFire architectures that support ff1 instruction. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@120959 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 8 ++++++++ gcc/config/m68k/m68k.h | 3 +++ gcc/config/m68k/m68k.md | 9 +++++++++ gcc/longlong.h | 5 +++++ 4 files changed, 25 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 014c268ee8d..ee405910c19 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2007-01-19 Sandra Loosemore + + * longlong.h (count_leading_zeros, COUNT_LEADING_ZEROS_0): Add + ColdFire alternatives. + * config/m68k/m68k.h (CLZ_DEFINED_VALUE_AT_ZERO): New macro. + * config/m68k/m68k.md (clzsi2): Define for ColdFire + architectures that support ff1 instruction. + 2007-01-19 Richard Sandiford Julian Brown diff --git a/gcc/config/m68k/m68k.h b/gcc/config/m68k/m68k.h index d373be7c468..e85c1d9b5fa 100644 --- a/gcc/config/m68k/m68k.h +++ b/gcc/config/m68k/m68k.h @@ -1006,6 +1006,9 @@ __transfer_from_trampoline () \ #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 +/* The ColdFire FF1 instruction returns 32 for zero. */ +#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1) + #define STORE_FLAG_VALUE (-1) #define Pmode SImode diff --git a/gcc/config/m68k/m68k.md b/gcc/config/m68k/m68k.md index c953ec2d434..b3e72e78a40 100644 --- a/gcc/config/m68k/m68k.md +++ b/gcc/config/m68k/m68k.md @@ -3961,6 +3961,15 @@ return "fabs%. %1,%0"; }) +;; bit indexing instructions + +;; ColdFire ff1 instruction implements clz. +(define_insn "clzsi2" + [(set (match_operand:SI 0 "register_operand" "=d") + (clz:SI (match_operand:SI 1 "register_operand" "0")))] + "TARGET_ISAAPLUS || TARGET_ISAC" + "ff1 %0") + ;; one complement instructions ;; "one_cmpldi2" is mainly here to help combine(). diff --git a/gcc/longlong.h b/gcc/longlong.h index 1325b31f0c9..8b512d2f284 100644 --- a/gcc/longlong.h +++ b/gcc/longlong.h @@ -521,6 +521,11 @@ UDItype __umulsidi3 (USItype, USItype); __asm__ ("bfffo %1{%b2:%b2},%0" \ : "=d" ((USItype) (count)) \ : "od" ((USItype) (x)), "n" (0)) +/* Some ColdFire architectures have a ff1 instruction supported via + __builtin_clz. */ +#elif defined (__mcfisaaplus__) || defined (__mcfisac__) +#define count_leading_zeros(count,x) ((count) = __builtin_clz (x)) +#define COUNT_LEADING_ZEROS_0 32 #endif #endif /* mc68000 */ -- 2.11.0