macosx-vecsave.asm   [plain text]

/* Vector save/restore routines.  Note that each vector save/restore
   requires 2 instructions (8 bytes.)

 THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE ENTRY POINT
 - callers have to jump to "saveFP+60" to save f29..f31, for example.
 For FP reg saves/restores, it takes one instruction (4 bytes) to do the
 operation; for Vector regs, 2 instructions are required (8 bytes.)
 MORAL: DO NOT MESS AROUND WITH THESE FUNCTIONS!  */

.text
	.align 2

.private_extern saveVEC
saveVEC:
	li r11,-192
	stvx v20,r11,r0
	li r11,-176
	stvx v21,r11,r0
	li r11,-160
	stvx v22,r11,r0
	li r11,-144
	stvx v23,r11,r0
	li r11,-128
	stvx v24,r11,r0
	li r11,-112
	stvx v25,r11,r0
	li r11,-96
	stvx v26,r11,r0
	li r11,-80
	stvx v27,r11,r0
	li r11,-64
	stvx v28,r11,r0
	li r11,-48
	stvx v29,r11,r0
	li r11,-32
	stvx v30,r11,r0
	li r11,-16
	stvx v31,r11,r0
	blr

.private_extern restVEC
restVEC:
	li r11,-192
	lvx v20,r11,r0
	li r11,-176
	lvx v21,r11,r0
	li r11,-160
	lvx v22,r11,r0
	li r11,-144
	lvx v23,r11,r0
	li r11,-128
	lvx v24,r11,r0
	li r11,-112
	lvx v25,r11,r0
	li r11,-96
	lvx v26,r11,r0
	li r11,-80
	lvx v27,r11,r0
	li r11,-64
	lvx v28,r11,r0
	li r11,-48
	lvx v29,r11,r0
	li r11,-32
	lvx v30,r11,r0
	li r11,-16
	lvx v31,r11,r0
	blr


/* saveVEC_vr11 -- as saveVEC but VRsave is returned in R11.  */

.private_extern saveVEC_vr11
saveVEC_vr11:
	li r11,-192
	stvx v20,r11,r0
	li r11,-176
	stvx v21,r11,r0
	li r11,-160
	stvx v22,r11,r0
	li r11,-144
	stvx v23,r11,r0
	li r11,-128
	stvx v24,r11,r0
	li r11,-112
	stvx v25,r11,r0
	li r11,-96
	stvx v26,r11,r0
	li r11,-80
	stvx v27,r11,r0
	li r11,-64
	stvx v28,r11,r0
	li r11,-48
	stvx v29,r11,r0
	li r11,-32
	stvx v30,r11,r0
	li r11,-16
	stvx v31,r11,r0
	mfspr r11,VRsave
	blr

/* as restVec, but the original VRsave value passed in R10.  */

.private_extern restVEC_vr10
restVEC_vr10:
	li r11,-192
	lvx v20,r11,r0
	li r11,-176
	lvx v21,r11,r0
	li r11,-160
	lvx v22,r11,r0
	li r11,-144
	lvx v23,r11,r0
	li r11,-128
	lvx v24,r11,r0
	li r11,-112
	lvx v25,r11,r0
	li r11,-96
	lvx v26,r11,r0
	li r11,-80
	lvx v27,r11,r0
	li r11,-64
	lvx v28,r11,r0
	li r11,-48
	lvx v29,r11,r0
	li r11,-32
	lvx v30,r11,r0
	li r11,-16
	lvx v31,r11,r0
				/* restore VRsave from R10.  */
	mtspr VRsave,r10
	blr