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Added MULH test

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vhaudiquet 2023-11-03 17:19:00 +01:00
parent de202e25b9
commit 3e110a82f4
2 changed files with 41 additions and 0 deletions
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40
tests/mulh.s Normal file
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@ -0,0 +1,40 @@
.include "exit_return.s"
.global _start
_start:
# Set base value of a0 to 'test failed'
addi a0, zero, 1
# Multiply 2 * 3 in t0, high bits
addi t0, zero, 3
addi t1, zero, 2
mulh t0, t0, t1
addi t1, zero, 0
beq t0, t1, mulh_low_ok
exret
mulh_low_ok:
# Multiply 2<<29 * 8 in t0, high bits
# Result high should be 2
addi t1, zero, 2
slli t0, t1, 29
addi t1, zero, 8
mulh t0, t0, t1
addi t1, zero, 2
beq t0, t1, mulh_high_ok
exret
mulh_high_ok:
# Multiply 2 << 29 * -8 in t0, high bits
# Result high should be 0xFFFF_FFFE ie -2 signed ?
addi t1, zero, 2
slli t0, t1, 29
addi t1, zero, -8
mulh t0, t0, t1
addi t1, zero, -2
beq t0, t1, mulh_neg_ok
exret
mulh_neg_ok:
addi a0, zero, 0
exret

1
tests/test.sh
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@ -29,3 +29,4 @@ test "BLT : Branch Less Than " "../build/tests/blt " 0
test "JAL : Jump And Link " "../build/tests/jal " 0
test "SWLW : Store Word Load Word " "../build/tests/swlw " 0
test "JALR : Jump And Link Register " "../build/tests/jalr " 0
test "MULH : MULtply High " "../build/tests/mulh " 0