selftests/powerpc: Standardise TM calls

#include "utils.h"

#include "tm.h"

#define TBEGIN          ".long 0x7C00051D ;"

#define TEND            ".long 0x7C00055D ;"

#define TCHECK          ".long 0x7C00059C ;"

#define TSUSPEND        ".long 0x7C0005DD ;"

#define TRESUME         ".long 0x7C2005DD ;"

#define SPRN_TEXASR     0x82

#define SPRN_DSCR       0x03

int test_body(void)

			"mtspr   %[sprn_dscr], 3;"

			/* start and suspend a transaction */

			TBEGIN

			"tbegin.;"

			"beq     1f;"

			TSUSPEND

			"tsuspend.;"

			/* hard loop until the transaction becomes doomed */

			"2: ;"

			TCHECK

			"tcheck 0;"

			"bc      4, 0, 2b;"

			/* record DSCR and TEXASR */

			"mfspr   3, %[sprn_texasr];"

			"std     3, %[texasr];"

			TRESUME

			TEND

			"tresume.;"

			"tend.;"

			"li      %[rv], 0;"

			"1: ;"

			: [rv]"=r"(rv), [dscr2]"=m"(dscr2), [texasr]"=m"(texasr)

		exit(1);

	asm volatile("li 1, 0 ;"		/* stack ptr == NULL */

		     "1:"

		     ".long 0x7C00051D ;"	/* tbegin */

		     "tbegin.;"

		     "beq 1b ;"			/* retry forever */

		     ".long 0x7C0005DD ; ;"	/* tsuspend */

		     "tsuspend.;"

		     "ld 2, 0(1) ;"		/* trigger segv" */

		     : : : "memory");