as: SH-Regs

 
 9.42.2.2 Register Names
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 You can use the predefined symbols 'r0', 'r1', 'r2', 'r3', 'r4', 'r5',
 'r6', 'r7', 'r8', 'r9', 'r10', 'r11', 'r12', 'r13', 'r14', and 'r15' to
 refer to the SH registers.
 
    The SH also has these control registers:
 
 'pr'
      procedure register (holds return address)
 
 'pc'
      program counter
 
 'mach'
 'macl'
      high and low multiply accumulator registers
 
 'sr'
      status register
 
 'gbr'
      global base register
 
 'vbr'
      vector base register (for interrupt vectors)