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Implement iabs for x86 SIMD

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This only covers the types necessary for implementing the Wasm SIMD spec--`i8x16`, `i16x8`, `i32x4`.
This commit is contained in:
Andrew Brown
2020-06-29 15:51:25 -07:00
parent 26bdf9c333
commit 737cf1d605
4 changed files with 28 additions and 0 deletions
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7
cranelift/codegen/meta/src/isa/x86/encodings.rs
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@@ -1638,6 +1638,7 @@ fn define_simd(
let fill_nop = shared.by_name("fill_nop");
let fmul = shared.by_name("fmul");
let fsub = shared.by_name("fsub");
let iabs = shared.by_name("iabs");
let iadd = shared.by_name("iadd");
let icmp = shared.by_name("icmp");
let imul = shared.by_name("imul");
@@ -2184,6 +2185,12 @@ fn define_simd(
e.enc_both_inferred(avgr, rec_fa.opcodes(opcodes));
}
// SIMD integer absolute value.
for (ty, opcodes) in &[(I8, &PABSB[..]), (I16, &PABSW[..]), (I32, &PABSD)] {
let iabs = iabs.bind(vector(*ty, sse_vector_size));
e.enc_both_inferred_maybe_isap(iabs, rec_furm.opcodes(opcodes), Some(use_ssse3_simd));
}
// SIMD logical operations
let band = shared.by_name("band");
let band_not = shared.by_name("band_not");

11
cranelift/codegen/meta/src/isa/x86/opcodes.rs
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@@ -303,6 +303,17 @@ pub static OR_IMM8_SIGN_EXTEND: [u8; 1] = [0x83];
/// Return the bitwise logical OR of packed single-precision values in xmm and x/m (SSE).
pub static ORPS: [u8; 2] = [0x0f, 0x56];
/// Compute the absolute value of bytes in xmm2/m128 and store the unsigned result in xmm1 (SSSE3).
pub static PABSB: [u8; 4] = [0x66, 0x0f, 0x38, 0x1c];
/// Compute the absolute value of 32-bit integers in xmm2/m128 and store the unsigned result in
/// xmm1 (SSSE3).
pub static PABSD: [u8; 4] = [0x66, 0x0f, 0x38, 0x1e];
/// Compute the absolute value of 16-bit integers in xmm2/m128 and store the unsigned result in
/// xmm1 (SSSE3).
pub static PABSW: [u8; 4] = [0x66, 0x0f, 0x38, 0x1d];
/// Converts 8 packed signed word integers from xmm1 and from xxm2/m128 into 16 packed signed byte
/// integers in xmm1 using signed saturation (SSE2).
pub static PACKSSWB: [u8; 3] = [0x66, 0x0f, 0x63];