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From-SVN: r381
This commit is contained in:
James Van Artsdalen 1992-03-03 19:42:18 +00:00
parent 412dc3482f
commit ab408a8674
2 changed files with 10 additions and 6 deletions
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2
gcc/config/i386/i386.c
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@ -49,7 +49,7 @@ static char *qi_high_reg_name[] = QI_HIGH_REGISTER_NAMES;
enum reg_class regclass_map[FIRST_PSEUDO_REGISTER] =
{
/* ax, dx, cx, bx */
AREG, DREG, CREG, Q_REGS,
AREG, DREG, CREG, BREG,
/* si, di, bp, sp */
SIREG, DIREG, INDEX_REGS, GENERAL_REGS,
/* FP registers */

14
gcc/config/i386/i386.h
View File

@ -309,13 +309,16 @@ extern int target_flags;
in a smaller-numbered class.
For any two classes, it is very desirable that there be another
class that represents their union. */
class that represents their union.
It might seem that class BREG is unnecessary, since no useful 386
opcode needs reg %ebx. But some systems pass args to the OS in ebx,
and the "b" register constraint is useful in asms for syscalls. */
enum reg_class
{
NO_REGS,
AREG, DREG, CREG,
AREG, DREG, CREG, BREG,
Q_REGS, /* %eax %ebx %ecx %edx */
SIREG, DIREG,
INDEX_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp */
@ -331,7 +334,7 @@ enum reg_class
#define REG_CLASS_NAMES \
{ "NO_REGS", \
"AREG", "DREG", "CREG", \
"AREG", "DREG", "CREG", "BREG", \
"Q_REGS", \
"SIREG", "DIREG", \
"INDEX_REGS", \
@ -346,7 +349,7 @@ enum reg_class
#define REG_CLASS_CONTENTS \
{ 0, \
0x1, 0x2, 0x4, /* AREG, DREG, CREG */ \
0x1, 0x2, 0x4, 0x8, /* AREG, DREG, CREG, BREG */ \
0xf, /* Q_REGS */ \
0x10, 0x20, /* SIREG, DIREG */ \
0x1007f, /* INDEX_REGS */ \
@ -409,6 +412,7 @@ extern enum reg_class regclass_map[FIRST_PSEUDO_REGISTER];
(C) == 't' ? FP_TOP_REG : \
(C) == 'u' ? FP_SECOND_REG : \
(C) == 'a' ? AREG : \
(C) == 'b' ? BREG : \
(C) == 'c' ? CREG : \
(C) == 'd' ? DREG : \
(C) == 'D' ? DIREG : \