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40 lines
1.7 KiB
Odin
40 lines
1.7 KiB
Odin
#+build amd64
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package test_internal
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import "core:testing"
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// The sign/zero-extend family is the only one whose two operands differ in width, so its AT&T
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// mnemonic names both -- `movsx` from i8 to i32 is `movsbl`. Emitting the name plus a single width
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// suffix produced `movsxl`, which no assembler has, so none of these forms could be built
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@(test)
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asm_extend_mnemonics :: proc(t: ^testing.T) {
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sx_8_16 :: asm(a: i8) -> (r: i16) { movsx r, a; }
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sx_8_32 :: asm(a: i8) -> (r: i32) { movsx r, a; }
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sx_8_64 :: asm(a: i8) -> (r: i64) { movsx r, a; }
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sx_16_32 :: asm(a: i16) -> (r: i32) { movsx r, a; }
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sx_16_64 :: asm(a: i16) -> (r: i64) { movsx r, a; }
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zx_8_16 :: asm(a: u8) -> (r: u16) { movzx r, a; }
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zx_8_32 :: asm(a: u8) -> (r: u32) { movzx r, a; }
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zx_8_64 :: asm(a: u8) -> (r: u64) { movzx r, a; }
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zx_16_32 :: asm(a: u16) -> (r: u32) { movzx r, a; }
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zx_16_64 :: asm(a: u16) -> (r: u64) { movzx r, a; }
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sxd :: asm(a: i32) -> (r: i64) { movsxd r, a; }
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testing.expect_value(t, sx_8_16(-1), i16(-1))
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testing.expect_value(t, sx_8_32(-1), i32(-1))
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testing.expect_value(t, sx_8_64(-1), i64(-1))
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testing.expect_value(t, sx_16_32(-300), i32(-300))
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testing.expect_value(t, sx_16_64(-300), i64(-300))
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testing.expect_value(t, sxd(-123456), i64(-123456))
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testing.expect_value(t, zx_8_16(0xFF), u16(255))
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testing.expect_value(t, zx_8_32(0xFF), u32(255))
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testing.expect_value(t, zx_8_64(0xFF), u64(255))
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testing.expect_value(t, zx_16_32(0xFFFF), u32(65535))
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testing.expect_value(t, zx_16_64(0xFFFF), u64(65535))
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// positive values too, so a mnemonic that merely truncates cannot pass
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testing.expect_value(t, sx_8_32(127), i32(127))
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testing.expect_value(t, zx_8_32(1), u32(1))
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}
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