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Implements f64x2.convert_low_i32x4_u for x64

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This commit is contained in:
Johnnie Birch
2021-06-05 23:15:50 -07:00
parent 16379db174
commit 2d676d838f
11 changed files with 94 additions and 6 deletions
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52
cranelift/codegen/src/isa/x64/lower.rs
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@@ -4154,6 +4154,58 @@ fn lower_insn_to_regs<C: LowerCtx<I = Inst>>(
dst,
));
}
Opcode::FcvtLowFromUint => {
// Algorithm uses unpcklps to help create a float that is equivalent
// 0x1.0p52 + double(src). 0x1.0p52 is unique because at this exponent
// every value of the mantissa represents a corresponding uint32 number.
// When we subtract 0x1.0p52 we are left with double(src).
let src = put_input_in_reg(ctx, inputs[0]);
let dst = get_output_reg(ctx, outputs[0]).only_reg().unwrap();
let uint_mask = ctx.alloc_tmp(types::I32X4).only_reg().unwrap();
ctx.emit(Inst::gen_move(dst, src, types::I32X4));
static UINT_MASK: [u8; 16] = [
0x00, 0x00, 0x30, 0x43, 0x00, 0x00, 0x30, 0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00,
];
let uint_mask_const = ctx.use_constant(VCodeConstantData::WellKnown(&UINT_MASK));
ctx.emit(Inst::xmm_load_const(
uint_mask_const,
uint_mask,
types::I32X4,
));
// Creates 0x1.0p52 + double(src)
ctx.emit(Inst::xmm_rm_r(
SseOpcode::Unpcklps,
RegMem::from(uint_mask),
dst,
));
static UINT_MASK_HIGH: [u8; 16] = [
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x30, 0x43,
];
let uint_mask_high_const =
ctx.use_constant(VCodeConstantData::WellKnown(&UINT_MASK_HIGH));
let uint_mask_high = ctx.alloc_tmp(types::I32X4).only_reg().unwrap();
ctx.emit(Inst::xmm_load_const(
uint_mask_high_const,
uint_mask_high,
types::I32X4,
));
// 0x1.0p52 + double(src) - 0x1.0p52
ctx.emit(Inst::xmm_rm_r(
SseOpcode::Subpd,
RegMem::from(uint_mask_high),
dst,
));
}
Opcode::FcvtFromUint => {
let dst = get_output_reg(ctx, outputs[0]).only_reg().unwrap();
let ty = ty.unwrap();