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frontend/ir_emitter: Add half-precision variant of FPNeg

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Lioncash 2019-03-23 13:21:55 -04:00 • committed by MerryMage
parent f01afc5ae6
commit c97efcb978
4 changed files with 24 additions and 6 deletions
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15
src/backend/x64/emit_x64_floating_point.cpp
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@ -38,6 +38,8 @@ namespace {
const Xbyak::Reg64 INVALID_REG = Xbyak::Reg64(-1);
constexpr u64 f16_negative_zero = 0x8000;
constexpr u64 f32_negative_zero = 0x80000000u;
constexpr u64 f32_nan = 0x7fc00000u;
constexpr u64 f32_non_sign_mask = 0x7fffffffu;
@ -341,9 +343,18 @@ void EmitX64::EmitFPAbs64(EmitContext& ctx, IR::Inst* inst) {
ctx.reg_alloc.DefineValue(inst, result);
}
void EmitX64::EmitFPNeg16(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
code.pxor(result, code.MConst(xword, f16_negative_zero));
ctx.reg_alloc.DefineValue(inst, result);
}
void EmitX64::EmitFPNeg32(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
code.pxor(result, code.MConst(xword, f32_negative_zero));
@ -352,7 +363,7 @@ void EmitX64::EmitFPNeg32(EmitContext& ctx, IR::Inst* inst) {
void EmitX64::EmitFPNeg64(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
code.pxor(result, code.MConst(xword, f64_negative_zero));