Subversion Repositories open8_urisc

# thumb_blx_in_range.s

#

# Test THUMB/THUMB-2 blx instructions just within the branch range limits.

# Because bit 1 of the branch target comes from the branch instruction

# address, the branch range from PC (branch instruction address + 4) is

# acutally -((1<<22) + 2) to ((1<<22) - 4) for THUMB and -((1<<24) + 2) to

# ((1<<24) - 4) from THUMB2.

        .syntax unified

        .section        .text.pre,"x"

# Add padding so that target is just in branch range.

        .space  8

        .align  2

        .global _backward_target

        .code   32

        .type   _backword_target, %function

_backward_target:

        bx      lr

        .size   _backward_target, .-_backward_target

        .text

# Define _start so that linker does not complain.

        .global _start

        .code   32

        .align  2

        .type   _start, %function

_start:

        bx      lr

        .size   _start, .-_start

        .global _backward_test

        .code   16

        .thumb_func

        .type   _backward_test, %function

_backward_test:

        nop.n

        blx     _backward_target

        .size   _backward_test, .-_backward_test

        .align  2

        .global _forward_test

        .code   16

        .thumb_func

        .type   _forward_test, %function

_forward_test:

        blx     _forward_target

        .size   _forward_test, .-_forward_test

        .code   32

        .section        .text.post,"x"

# Add padding so that target is just in branch range.

        .space  12

        .align  2

        .global _forward_target

        .code   32

        .type   _forward_target, %function

_forward_target:

        bx      lr

        .size   _forward_target, .-_forward_target