OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

pa.h (LEGITIMIZE_ADDRESS): Rework to create REG or REG+D addresses instead of REG+REG addresses. 

* pa.h (LEGITIMIZE_ADDRESS): Rework to create REG or REG+D
	addresses instead of REG+REG addresses.

From-SVN: r3243
This commit is contained in:
Jeff Law 1993-01-14 14:50:18 -07:00
parent ba1811f11f
commit f014712100
1 changed files with 43 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
gcc/config/pa/pa.h
View File

@ -1232,23 +1232,54 @@ extern union tree_node *current_function_decl;
GO_IF_LEGITIMATE_ADDRESS.
It is always safe for this macro to do nothing. It exists to recognize
opportunities to optimize the output. */
opportunities to optimize the output.
/* On the HP-PA, change REG+N into REG+REG, and REG+(X*Y) into REG+REG. */
For the PA, transform:
memory(X + <large int>)
into:
Y = <large int> & ~mask;
Z = X + Y
memory (Z + (<large int> & mask));
This is for CSE to find several similar references, and only use one Z.
MODE_FLOAT references allow displacements which fit in 5 bits, so use
0xf as the mask.
MODE_INT references allow displacements which fit in 11 bits, so use
0x1fff as the mask.
This relies on the fact that most mode MODE_FLOAT references will use FP
registers and most mode MODE_INT references will use integer registers.
(In the rare case of an FP register used in an integer MODE, we depend
on secondary reloads and the final output pass to clean things up.) */
Also change REG+(X*Y) into REG. (With X*Y in an extra pseudo). */
#define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
{ if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 1))) \
(X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \
copy_to_mode_reg (SImode, XEXP (X, 1))); \
if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 0))) \
(X) = gen_rtx (PLUS, SImode, XEXP (X, 1), \
copy_to_mode_reg (SImode, XEXP (X, 0))); \
{ if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
&& GET_CODE (XEXP (X, 1)) == CONST_INT) \
{ \
rtx int_reg, ptr_reg; \
int offset = INTVAL (XEXP (X, 1)); \
int mask = GET_MODE_CLASS (mode) == MODE_FLOAT ? 0xf \
: 0x1fff; \
int_reg = force_reg (SImode, GEN_INT (offset & ~ mask)); \
ptr_reg = force_reg (SImode, \
gen_rtx (PLUS, SImode, \
XEXP (X, 0), int_reg)); \
X = plus_constant (ptr_reg, offset & mask); \
goto WIN; \
} \
if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == MULT) \
(X) = gen_rtx (PLUS, SImode, XEXP (X, 1), \
force_operand (XEXP (X, 0), 0)); \
(X) = force_operand (gen_rtx (PLUS, SImode, XEXP (X, 1), \
force_operand (XEXP (X, 0), 0)), 0);\
if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == MULT) \
(X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \
force_operand (XEXP (X, 1), 0)); \
(X) = force_operand (gen_rtx (PLUS, SImode, XEXP (X, 0), \
force_operand (XEXP (X, 1), 0)), 0);\
if (memory_address_p (MODE, X)) \
goto WIN; \
if (flag_pic) (X) = legitimize_pic_address (X, MODE, gen_reg_rtx (Pmode));\