🚀 go-pugleaf

Bug report for gas.

Version: gas-1.38

Machine: sun4

Operating system: SunOS 4.1.2

file:

------------------------------ cut here ------------------------------
/* unimp.s */
.text
	unimp 17
------------------------------ cut here ------------------------------

Options for gas: gas unimp.s -o unimp.o

What's wrong:

unimp.o contains, according to adb, the instruct `unimp 0x4'. The same
source file assembled with SunOS as (/usr/bin/as) produces a file
which isn't identical to unimp.o and with `unimp 0x11'.

My explanation:

Gas thinks unimp takes a 22 bit PC relative operand, when in fact it's
not PC relative.

My patch:

*** sparc-opcode.h.orig	Thu Jun  7 22:22:10 1990
--- sparc-opcode.h	Sat Aug  8 23:12:55 1992
***************
*** 58,63 ****
--- 58,64 ----
     D    crsd coprocessor register
     h    22 high bits.
     i    13 bit Immediate.
+    s    22 bit Immediate.
     l    22 bit PC relative immediate.
     L    30 bit PC relative immediate.
     a    Annul.  The annul bit is set.
***************
*** 497,503 ****
  { "tsubcctv",   0x80580000, 0x40a00000, "1,2,d", 0 },
  { "tsubcctv",   0x80582000, 0x40a00000, "1,i,d", 0 },
  
! { "unimp",      0x00000000, 0x00000000, "l", 0 },
  
  { "iflush",     0x81d80000, 0x40202000, "1+2", 0 },
  { "iflush",     0x81d82000, 0x40200000, "1+i", 0 },
--- 498,504 ----
  { "tsubcctv",   0x80580000, 0x40a00000, "1,2,d", 0 },
  { "tsubcctv",   0x80582000, 0x40a00000, "1,i,d", 0 },
  
! { "unimp",      0x00000000, 0x00000000, "s", 0 },
  
  { "iflush",     0x81d80000, 0x40202000, "1+2", 0 },
  { "iflush",     0x81d82000, 0x40200000, "1+i", 0 },

*** sparc.c.orig	Mon Oct 22 19:04:04 1990
--- sparc.c	Sat Aug  8 23:16:16 1992
***************
*** 665,670 ****
--- 665,674 ----
  	        the_insn.reloc = RELOC_HI22;
  		goto immediate;
  
+ 	    case 's':      /* 22 bit immediate sak */
+ 		the_insn.reloc = RELOC_BASE22;
+ 		goto immediate;
+ 
  	    case 'l':   /* 22 bit PC relative immediate */
  	        the_insn.reloc = RELOC_WDISP22;
  		the_insn.pcrel = 1;

/assar