pan/va: Remove DISCARD.f32 destination
It doesn't actually write anything. This is a pointless divergence from Bifrost. Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16585>
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@ -805,14 +805,12 @@
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<mod name="eq" start="36" size="1"/>
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</ins>
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<ins name="DISCARD.f32" title="Discard fragment" opcode="0x20" unit="CVT">
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<ins name="DISCARD.f32" title="Discard fragment" dests="0" opcode="0x20" unit="CVT">
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<desc>
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Evaluates the given condition, and if it passes, discards the current
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fragment and terminates the thread. The destination should be set to R60.
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Only valid in a **fragment** shader.
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fragment and terminates the thread. Only valid in a **fragment** shader.
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</desc>
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<cmp/>
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<dest>Updated coverage mask (set to R60)</dest>
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<src absneg="true" swizzle="true">Left value to compare</src>
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<src absneg="true" swizzle="true">Right value to compare</src>
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</ins>
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@ -69,13 +69,6 @@ TEST_F(LowerIsel, 16BitSwizzles) {
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}
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}
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TEST_F(LowerIsel, DiscardImplicitR60) {
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CASE(bi_discard_f32(b, reg, reg, BI_CMPF_EQ), {
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bi_instr *I = bi_discard_f32(b, reg, reg, BI_CMPF_EQ);
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I->dest[0] = bi_register(60);
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});
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}
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TEST_F(LowerIsel, JumpsLoweredToBranches) {
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bi_block block = { };
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@ -41,12 +41,6 @@ va_lower_isel(bi_instr *I)
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I->src[1] = bi_zero();
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break;
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/* Needs to output the coverage mask */
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case BI_OPCODE_DISCARD_F32:
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assert(bi_is_null(I->dest[0]));
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I->dest[0] = bi_register(60);
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break;
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/* Extra source in Valhall not yet modeled in the Bifrost IR */
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case BI_OPCODE_ICMP_I32:
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I->op = BI_OPCODE_ICMP_U32;
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