Alphaの32/64bitコード比較

alpha-elf.s

	.set noreorder
	.set volatile
	.set noat
	.text
	.align 2
	.globl test
	.ent test
test:
	.frame $30,0,$26,0
	ldgp $29,0($27)
$test..ng:
	.prologue 1
	lda $1,global
	stl $16,0($1)
	ret $31,($26),1
	.end test
	.align 2
	.globl test2
	.ent test2
test2:
	.frame $30,16,$26,0
	.mask 0x4000000,-16
	ldgp $29,0($27)
$test2..ng:
	lda $30,-16($30)
	stq $26,0($30)
	.prologue 1
	lda $16,4($31)
	jsr $26,test
	ldgp $29,0($26)
	lda $16,8($31)
	jsr $26,test
	ldgp $29,0($26)
	lda $16,8($31)
	jsr $26,test
	ldgp $29,0($26)
	ldq $26,0($30)
	lda $30,16($30)
	ret $31,($26),1
	.end test2
	.comm	global,4,4
	.ident	"GCC: (GNU) 4.6.1"

alpha-elf.txt

alpha-elf.x:     file format elf64-alpha


Disassembly of section .text:

00000001200000e8 <test>:
int global;

void test(int v) {
   1200000e8:	02 00 bb 27 	ldah	gp,2(t12)
   1200000ec:	d0 80 bd 23 	lda	gp,-32560(gp)
    global = v;
   1200000f0:	08 80 3d a4 	ldq	t0,-32760(gp)
   1200000f4:	00 00 01 b2 	stl	a0,0(t0)
}
   1200000f8:	01 80 fa 6b 	ret

00000001200000fc <test2>:

void test2(void) {
   1200000fc:	02 00 bb 27 	ldah	gp,2(t12)
   120000100:	bc 80 bd 23 	lda	gp,-32580(gp)
   120000104:	f0 ff de 23 	lda	sp,-16(sp)
   120000108:	00 00 5e b7 	stq	ra,0(sp)
    test(sizeof(int));
   12000010c:	04 00 1f 22 	lda	a0,4
   120000110:	00 80 7d a7 	ldq	t12,-32768(gp)
   120000114:	f4 7f 5b 6b 	jsr	ra,(t12),1200000e8 <test>
   120000118:	02 00 ba 27 	ldah	gp,2(ra)
   12000011c:	a0 80 bd 23 	lda	gp,-32608(gp)
    test(sizeof(long));
   120000120:	08 00 1f 22 	lda	a0,8
   120000124:	00 80 7d a7 	ldq	t12,-32768(gp)
   120000128:	ef 7f 5b 6b 	jsr	ra,(t12),1200000e8 <test>
   12000012c:	02 00 ba 27 	ldah	gp,2(ra)
   120000130:	8c 80 bd 23 	lda	gp,-32628(gp)
    test(sizeof(void *));
   120000134:	08 00 1f 22 	lda	a0,8
   120000138:	00 80 7d a7 	ldq	t12,-32768(gp)
   12000013c:	ea 7f 5b 6b 	jsr	ra,(t12),1200000e8 <test>
   120000140:	02 00 ba 27 	ldah	gp,2(ra)
   120000144:	78 80 bd 23 	lda	gp,-32648(gp)
}
   120000148:	00 00 5e a7 	ldq	ra,0(sp)
   12000014c:	10 00 de 23 	lda	sp,16(sp)
   120000150:	01 80 fa 6b 	ret

alpha-winnt.s

	.set noreorder
	.set volatile
	.set noat
	.globl	__fltused
	.file	1 "alpha.c"
	.text
	.align 2
	.globl test
	.ent test
test:
	.frame $30,0,$26,0
	.prologue 0
	lda $1,global
	stl $16,0($1)
	ret $31,($26),1
	.end test
	.align 2
	.globl test2
	.ent test2
test2:
	.frame $30,0,$26,0
	.mask 0x4000000,0
	lda $30,-16($30)
	stq $26,0($30)
	.prologue 0
	lda $16,4
	bsr $26,test
	lda $16,4
	bsr $26,test
	lda $16,4
	bsr $26,test
	ldq $26,0($30)
	lda $30,16($30)
	ret $31,($26),1
	.end test2
	.comm global,4

alpha.c

int global;

void test(int v) {
    global = v;
}

void test2(void) {
    test(sizeof(int));
    test(sizeof(long));
    test(sizeof(void *));
}