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sh.h (LOAD_EXTEND_OP): QImode zero-extends on SHmedia.

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* sh.h (LOAD_EXTEND_OP): QImode zero-extends on SHmedia.
	* sh.md (truncdiqi2, movqi_media): Likewise.

From-SVN: r55757
This commit is contained in:
J"orn Rennecke 2002-07-25 19:38:54 +00:00 committed by Joern Rennecke
parent 9b331d8d72
commit 5932468563
3 changed files with 14 additions and 8 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Thu Jul 25 20:34:50 2002 J"orn Rennecke <joern.rennecke@superh.com>
* sh.h (LOAD_EXTEND_OP): QImode zero-extends on SHmedia.
* sh.md (truncdiqi2, movqi_media): Likewise.
2002-07-25 Neil Booth <neil@daikokuya.co.uk>
* gcse.c (obstack_chunk_alloc): Remove.

5
gcc/config/sh/sh.h
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@ -2623,9 +2623,12 @@ while (0)
will either zero-extend or sign-extend. The value of this macro should
be the code that says which one of the two operations is implicitly
done, NIL if none. */
/* For SHmedia, we can truncate to QImode easier using zero extension. */
/* FP registers can load SImode values, but don't implicitly sign-extend
them to DImode. */
#define LOAD_EXTEND_OP(MODE) ((MODE) != SImode ? SIGN_EXTEND : NIL)
#define LOAD_EXTEND_OP(MODE) \
(((MODE) == QImode && TARGET_SHMEDIA) ? ZERO_EXTEND \
: (MODE) != SImode ? SIGN_EXTEND : NIL)
/* Define if loading short immediate values into registers sign extends. */
#define SHORT_IMMEDIATES_SIGN_EXTEND

12
gcc/config/sh/sh.md
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@ -3382,17 +3382,15 @@
[(set_attr "type" "arith_media,store_media")
(set_attr "length" "8,4")])
; N.B. we want sign-extension here because
; - we need to be consistent with LOAD_EXTEND_OP and movqi
; - only sign extension allows us to do signed compares transparently.
; unsigned compares don't care about the kind of extension as long as
; it's consistent.
; N.B. This should agree with LOAD_EXTEND_OP and movqi.
; Because we use zero extension, we can't provide signed QImode compares
; using a simple compare or conditional banch insn.
(define_insn "truncdiqi2"
[(set (match_operand:QI 0 "general_movdst_operand" "=r,m")
(truncate:QI (match_operand:DI 1 "register_operand" "r,r")))]
"TARGET_SHMEDIA"
"@
ori %1, -256, %0
and %1, 255, %0
st%M0.b %m0, %1"
[(set_attr "type" "arith_media,store")])
@ -3741,7 +3739,7 @@
"@
add.l %1, r63, %0
movi %1, %0
ld%M1.b %m1, %0
ld%M1.ub %m1, %0
st%M0.b %m0, %1"
[(set_attr "type" "arith_media,arith_media,load_media,store_media")])