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(CALL_NEXT_PTR): Like CALL_NEXT(), except that the two argument

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registers are passed via macro args.
(CALL_NEXT): Define in terms of CALL_NEXT_PTR().
(rotate_regs): Fix it so it doesn't overwrite any local registers
	once they are rotated.  Note: it's OK to write the output
	registers, since those are outside of the rotating partition.

(Logical change 1.184)
This commit is contained in:
mostang.com!davidm 2004-03-19 08:18:44 +00:00
parent d5dc7dc613
commit 96d2898321
1 changed files with 17 additions and 10 deletions
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27
tests/ia64-test-nat-asm.S
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@ -25,18 +25,20 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
.text .text
#define CALL_NEXT(gp_save_reg) \ #define CALL_NEXT_PTR(gp_save_reg, arg0, arg1) \
ld8 r2 = [in0], 8;; /* read the next function pointer */ \ ld8 r2 = [arg0], 8;; /* read the next function pointer */ \
ld8 r3 = [r2], 8;; /* read the function's entry-point */ \ ld8 r3 = [r2], 8;; /* read the function's entry-point */ \
ld8 r2 = [r2];; /* read the function's gp */ \ ld8 r2 = [r2];; /* read the function's gp */ \
mov b6 = r3; \ mov b6 = r3; \
mov gp_save_reg = gp; \ mov gp_save_reg = gp; \
mov out0 = in0; \ mov out0 = arg0; \
mov out1 = in1; \ mov out1 = arg1; \
mov gp = r2; \ mov gp = r2; \
br.call.sptk.many rp = b6;; \ br.call.sptk.many rp = b6;; \
mov gp = gp_save_reg mov gp = gp_save_reg
#define CALL_NEXT(gp_save_reg) CALL_NEXT_PTR(gp_save_reg, in0, in1)
#define LOAD_VAL(reg) \ #define LOAD_VAL(reg) \
ld8 reg = [in1], 8;; \ ld8 reg = [in1], 8;; \
tbit.nz p15, p0 = reg, 0;; \ tbit.nz p15, p0 = reg, 0;; \
@ -250,6 +252,11 @@ save_static_to_scratch:
br.ret.sptk.many rp br.ret.sptk.many rp
.endp save_static_to_scratch .endp save_static_to_scratch
/* Rotate registers a bit in a vain attempt to sow some confusion.
Care must be taken not to write any rotating general register
after rotation, because we keep the preserved state
there... */
.global rotate_regs .global rotate_regs
.proc rotate_regs .proc rotate_regs
rotate_regs: rotate_regs:
@ -263,19 +270,18 @@ rotate_regs:
mov loc2 = pr mov loc2 = pr
.save ar.lc, loc3 .save ar.lc, loc3
mov loc3 = ar.lc mov loc3 = ar.lc
.spillreg r4, loc4
mov r8 = in0 mov loc4 = r4
mov r9 = in1
ld8 r2 = [in1], 8;; ld8 r2 = [in1], 8;;
mov r8 = in0
mov r9 = in1
and r2 = 127, r2;; and r2 = 127, r2;;
mov ar.ec = 0 mov ar.ec = 0
mov ar.lc = r2;; mov ar.lc = r2;;
1: br.ctop.dptk.few 1b;; 1: br.ctop.dptk.few 1b;;
mov in0 = r8 CALL_NEXT_PTR(r4, r8, r9)
mov in1 = r9;;
CALL_NEXT(loc4)
clrrrb clrrrb
@ -283,6 +289,7 @@ rotate_regs:
mov rp = loc1 mov rp = loc1
mov pr = loc2, -1 mov pr = loc2, -1
mov ar.lc = loc3 mov ar.lc = loc3
mov r4 = loc4
br.ret.sptk.many rp br.ret.sptk.many rp
.endp rotate_regs .endp rotate_regs