diff options
Diffstat (limited to 'test-suite/tests/numbers.test')
-rw-r--r-- | test-suite/tests/numbers.test | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test-suite/tests/numbers.test b/test-suite/tests/numbers.test index 8cecb06ad..59e370ec9 100644 --- a/test-suite/tests/numbers.test +++ b/test-suite/tests/numbers.test @@ -5390,11 +5390,19 @@ (for-each (lambda (n) (for-each (lambda (count) (test n count)) `(-1000 + ,(* 2 (- fixnum-bit)) + ,(- -3 fixnum-bit) + ,(- -2 fixnum-bit) + ,(- -1 fixnum-bit) ,(- fixnum-bit) ,(- (- fixnum-bit 1)) -3 -2 -1 0 1 2 3 ,(- fixnum-bit 1) ,fixnum-bit + ,(+ fixnum-bit 1) + ,(+ fixnum-bit 2) + ,(+ fixnum-bit 3) + ,(* 2 fixnum-bit) 1000))) (list 0 1 3 23 -1 -3 -23 fixnum-max @@ -5423,6 +5431,22 @@ '(#b11001 #b11100 #b11101 #b10001 #b10100 #b10101))) (list 0 64 -64 (* 64 fixnum-max) (* 64 fixnum-min))) + ;; Right shift by LONG_MIN, typically (ash -1 63) and (ash -1 31) + ;; depending on the word size, where negating the shift count + ;; overflows. See <https://bugs.gnu.org/21901>. + (pass-if-equal "Right shift of positive integer by (ash -1 63) bits" + 0 + (ash-variant 123 (ash -1 63))) + (pass-if-equal "Right shift of negative integer by (ash -1 63) bits" + (if rounded? 0 -1) + (ash-variant -123 (ash -1 63))) + (pass-if-equal "Right shift of positive integer by (ash -1 31) bits" + 0 + (ash-variant 123 (ash -1 31))) + (pass-if-equal "Right shift of negative integer by (ash -1 31) bits" + (if rounded? 0 -1) + (ash-variant -123 (ash -1 31))) + ;; Huge shift counts (pass-if-equal "Huge left shift of 0" 0 |