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m68k: Use M68K_SCALE_AVAILABLE on __mpn_lshift and __mpn_rshift

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This patch adds a new macro, M68K_SCALE_AVAILABLE, similar to gmp
scale_available_p (mpn/m68k/m68k-defs.m4) that expand to 1 if a
scale factor can be used in addressing modes.  This is used
instead of __mc68020__ for some optimization decisions.

Checked on a build for m68k-linux-gnu target mc68020 and mc68040.
This commit is contained in:
Adhemerval Zanella 2023-08-18 14:49:31 -03:00
parent b85880633f
commit 87ced255bd
3 changed files with 14 additions and 7 deletions
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6
sysdeps/m68k/m680x0/lshift.S
View file

@ -57,9 +57,9 @@ ENTRY(__mpn_lshift)
bne L(Lnormal)
cmpl R(s_ptr),R(res_ptr)
bls L(Lspecial) /* jump if s_ptr >= res_ptr */
#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020))
#if M68K_SCALE_AVAILABLE
lea MEM_INDX1(s_ptr,s_size,l,4),R(a2)
#else /* not mc68020 */
#else
movel R(s_size),R(d0)
asll #2,R(d0)
lea MEM_INDX(s_ptr,d0,l),R(a2)
@ -71,7 +71,7 @@ L(Lnormal:)
moveql #32,R(d5)
subl R(cnt),R(d5)
#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020))
#if M68K_SCALE_AVAILABLE
lea MEM_INDX1(s_ptr,s_size,l,4),R(s_ptr)
lea MEM_INDX1(res_ptr,s_size,l,4),R(res_ptr)
#else /* not mc68000 */

8
sysdeps/m68k/m680x0/rshift.S
View file

@ -56,9 +56,9 @@ ENTRY(__mpn_rshift)
bne L(Lnormal)
cmpl R(res_ptr),R(s_ptr)
bls L(Lspecial) /* jump if res_ptr >= s_ptr */
#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020))
#if M68K_SCALE_AVAILABLE
lea MEM_INDX1(res_ptr,s_size,l,4),R(a2)
#else /* not mc68020 */
#else
movel R(s_size),R(d0)
asll #2,R(d0)
lea MEM_INDX(res_ptr,d0,l),R(a2)
@ -121,10 +121,10 @@ L(Lend:)
cfi_restore_state
L(Lspecial:)
#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020))
#if M68K_SCALE_AVAILABLE
lea MEM_INDX1(s_ptr,s_size,l,4),R(s_ptr)
lea MEM_INDX1(res_ptr,s_size,l,4),R(res_ptr)
#else /* not mc68000 */
#else
movel R(s_size),R(d0)
asll #2,R(d0)
addl R(d0),R(s_ptr)

7
sysdeps/m68k/m680x0/sysdep.h
View file

@ -37,3 +37,10 @@
OP " " SRC "(" PC "), " DST
#endif /* __ASSEMBLER__ */
# if defined __mc68020__ || defined __mc68030__ || defined __mc68040__ \
|| defined __mc68060__
# define M68K_SCALE_AVAILABLE 1
# else
# define M68K_SCALE_AVAILABLE 0
# endif