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Code Issues Releases Activity

JIT: Support negative address offsets.

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This commit is contained in:
bunnei 2015-07-31 12:40:09 -04:00
parent 094ae6fadb
commit cfb354f11f
1 changed files with 25 additions and 26 deletions
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51
src/video_core/shader/shader_jit_x64.cpp
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@ -91,9 +91,10 @@ const JitFunction instr_table[64] = {
// purposes, as documented below:
/// Pointer to the uniform memory
static const X64Reg UNIFORMS = R10;
static const X64Reg UNIFORMS = R9;
/// The two 32-bit VS address offset registers set by the MOVA instruction
static const X64Reg ADDROFFS_REG = R11;
static const X64Reg ADDROFFS_REG_0 = R10;
static const X64Reg ADDROFFS_REG_1 = R11;
/// VS loop count register
static const X64Reg LOOPCOUNT_REG = R12;
/// Current VS loop iteration number (we could probably use LOOPCOUNT_REG, but this quicker)
@ -162,21 +163,18 @@ void JitCompiler::Compile_SwizzleSrc(Instruction instr, unsigned src_num, Source
if (src_num == offset_src && instr.common.address_register_index != 0) {
switch (instr.common.address_register_index) {
case 1: // address offset 1
MOV(32, R(RBX), R(ADDROFFS_REG));
MOVAPS(dest, MComplex(src_ptr, ADDROFFS_REG_0, 1, src_offset));
break;
case 2: // address offset 2
MOV(64, R(RBX), R(ADDROFFS_REG));
SHR(64, R(RBX), Imm8(32));
MOVAPS(dest, MComplex(src_ptr, ADDROFFS_REG_1, 1, src_offset));
break;
case 3: // adddress offet 3
MOV(64, R(RBX), R(LOOPCOUNT_REG));
MOVAPS(dest, MComplex(src_ptr, LOOPCOUNT_REG, 1, src_offset));
break;
default:
UNREACHABLE();
break;
}
MOVAPS(dest, MComplex(src_ptr, RBX, 1, src_offset));
} else {
// Load the source
MOVAPS(dest, MDisp(src_ptr, src_offset));
@ -381,33 +379,34 @@ void JitCompiler::Compile_MOVA(Instruction instr) {
// Get result
MOVQ_xmm(R(RAX), SRC1);
SHL(64, R(RAX), Imm8(4)); // Multiply by 16 to be used as an offset later
// Handle destination enable
if (swiz.DestComponentEnabled(0) && swiz.DestComponentEnabled(1)) {
MOV(64, R(ADDROFFS_REG), R(RAX)); // Overwrite both
// Move and sign-extend low 32 bits
MOVSX(64, 32, ADDROFFS_REG_0, R(RAX));
// Move and sign-extend high 32 bits
SHR(64, R(RAX), Imm8(32));
MOVSX(64, 32, ADDROFFS_REG_1, R(RAX));
// Multiply by 16 to be used as an offset later
SHL(64, R(ADDROFFS_REG_0), Imm8(4));
SHL(64, R(ADDROFFS_REG_1), Imm8(4));
} else {
if (swiz.DestComponentEnabled(0)) {
// Preserve Y-component
// Move and sign-extend low 32 bits
MOVSX(64, 32, ADDROFFS_REG_0, R(RAX));
// Clear low 32 bits of previous address register
MOV(32, R(RBX), R(ADDROFFS_REG));
XOR(64, R(ADDROFFS_REG), R(RBX));
// Clear high 32-bits of new address register
MOV(32, R(RAX), R(RAX));
// Multiply by 16 to be used as an offset later
SHL(64, R(ADDROFFS_REG_0), Imm8(4));
} else if (swiz.DestComponentEnabled(1)) {
// Preserve X-component
// Move and sign-extend high 32 bits
SHR(64, R(RAX), Imm8(32));
MOVSX(64, 32, ADDROFFS_REG_1, R(RAX));
// Clear high 32-bits of previous address register
MOV(32, R(ADDROFFS_REG), R(ADDROFFS_REG));
// Clear low 32 bits of new address register
MOV(32, R(RBX), R(RAX));
XOR(64, R(RAX), R(RBX));
// Multiply by 16 to be used as an offset later
SHL(64, R(ADDROFFS_REG_1), Imm8(4));
}
OR(64, R(ADDROFFS_REG), R(RAX)); // Combine result
}
}